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    <link:label id="lab_us-gaap_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1_b8c2005d-ddee-48ae-aa18-59ed81ca8f19_terseLabel_en-US" xlink:label="lab_us-gaap_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment acquisitions in accruals</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_OtherRevenueMember" xlink:to="lab_aqunf_OtherRevenueMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongTermDebtAndCapitalLeaseObligations_4fb1c3cf-1cf8-44e1-adf0-6ab970cf869d_totalLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total obligations</link:label>
    <link:label id="lab_us-gaap_LongTermDebtAndCapitalLeaseObligations_label_en-US" xlink:label="lab_us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt and Lease Obligation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:to="lab_us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_ManagementSuccessionandExecutiveRetirementExpense_cd8e29dc-6560-4537-87e3-caa9b3c8740b_terseLabel_en-US" xlink:label="lab_aqunf_ManagementSuccessionandExecutiveRetirementExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Management succession and executive retirement expense</link:label>
    <link:label id="lab_aqunf_ManagementSuccessionandExecutiveRetirementExpense_label_en-US" xlink:label="lab_aqunf_ManagementSuccessionandExecutiveRetirementExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Management Succession and Executive Retirement Expense</link:label>
    <link:label id="lab_aqunf_ManagementSuccessionandExecutiveRetirementExpense_documentation_en-US" xlink:label="lab_aqunf_ManagementSuccessionandExecutiveRetirementExpense" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Management Succession and Executive Retirement Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_ManagementSuccessionandExecutiveRetirementExpense" xlink:href="aqunf-20201231.xsd#aqunf_ManagementSuccessionandExecutiveRetirementExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_ManagementSuccessionandExecutiveRetirementExpense" xlink:to="lab_aqunf_ManagementSuccessionandExecutiveRetirementExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_country_CA_c9fc3dc6-7c54-4f5c-81d1-7292b6be6185_terseLabel_en-US" xlink:label="lab_country_CA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Canada</link:label>
    <link:label id="lab_country_CA_8fa6a1a8-408e-4439-9848-44ba41710f41_verboseLabel_en-US" xlink:label="lab_country_CA" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Canada</link:label>
    <link:label id="lab_country_CA_label_en-US" xlink:label="lab_country_CA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CANADA</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_country_CA" xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_CA"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_country_CA" xlink:to="lab_country_CA" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember_1b9b013f-a6fe-4654-be5f-013f11b1831f_terseLabel_en-US" xlink:label="lab_us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Post-Employment Benefit Payments</link:label>
    <link:label id="lab_us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember_label_en-US" xlink:label="lab_us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Pension, Postretirement and Supplemental Plans [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember" xlink:to="lab_us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_PeriodFourMember_18581d7e-dec5-4bf6-b57d-fe358d74d1d8_terseLabel_en-US" xlink:label="lab_aqunf_PeriodFourMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Due after 5 years</link:label>
    <link:label id="lab_aqunf_PeriodFourMember_label_en-US" xlink:label="lab_aqunf_PeriodFourMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Period Four [Member]</link:label>
    <link:label id="lab_aqunf_PeriodFourMember_documentation_en-US" xlink:label="lab_aqunf_PeriodFourMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Period 4 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_PeriodFourMember" xlink:href="aqunf-20201231.xsd#aqunf_PeriodFourMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_PeriodFourMember" xlink:to="lab_aqunf_PeriodFourMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TaxCreditCarryforwardAmount_858590a0-2968-4108-a576-db715061bb24_terseLabel_en-US" xlink:label="lab_us-gaap_TaxCreditCarryforwardAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax credits</link:label>
    <link:label id="lab_us-gaap_TaxCreditCarryforwardAmount_label_en-US" xlink:label="lab_us-gaap_TaxCreditCarryforwardAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax Credit Carryforward, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardAmount" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TaxCreditCarryforwardAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TaxCreditCarryforwardAmount" xlink:to="lab_us-gaap_TaxCreditCarryforwardAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PreferredStockValue_515278ff-272d-49a2-bd15-5143399ac883_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred shares</link:label>
    <link:label id="lab_us-gaap_PreferredStockValue_c60c0aaa-93a8-467c-8804-564df5bddd04_verboseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockValue" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Carrying amount</link:label>
    <link:label id="lab_us-gaap_PreferredStockValue_label_en-US" xlink:label="lab_us-gaap_PreferredStockValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred Stock, Value, Issued</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PreferredStockValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockValue" xlink:to="lab_us-gaap_PreferredStockValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_7b6dfd75-797a-4a1f-9771-64561d1f577a_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward" xlink:to="lab_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_RedeemableNonControllingInterestMember_136841e6-19c8-4051-8c64-d9b081f9b1ad_terseLabel_en-US" xlink:label="lab_aqunf_RedeemableNonControllingInterestMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redeemable Non-Controlling Interest</link:label>
    <link:label id="lab_aqunf_RedeemableNonControllingInterestMember_label_en-US" xlink:label="lab_aqunf_RedeemableNonControllingInterestMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redeemable Non-Controlling Interest [Member]</link:label>
    <link:label id="lab_aqunf_RedeemableNonControllingInterestMember_documentation_en-US" xlink:label="lab_aqunf_RedeemableNonControllingInterestMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redeemable Non-Controlling Interest [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_RedeemableNonControllingInterestMember" xlink:href="aqunf-20201231.xsd#aqunf_RedeemableNonControllingInterestMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_RedeemableNonControllingInterestMember" xlink:to="lab_aqunf_RedeemableNonControllingInterestMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RegulatoryLiabilityNoncurrent_c5db052a-ca33-4611-8778-8d87a68bebe1_verboseLabel_en-US" xlink:label="lab_us-gaap_RegulatoryLiabilityNoncurrent" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulatory liabilities (note 7)</link:label>
    <link:label id="lab_us-gaap_RegulatoryLiabilityNoncurrent_1889c595-f731-4e40-bf5a-3c4515da2d96_terseLabel_en-US" xlink:label="lab_us-gaap_RegulatoryLiabilityNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current regulatory liabilities</link:label>
    <link:label id="lab_us-gaap_RegulatoryLiabilityNoncurrent_label_en-US" xlink:label="lab_us-gaap_RegulatoryLiabilityNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulatory Liability, Noncurrent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityNoncurrent" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RegulatoryLiabilityNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RegulatoryLiabilityNoncurrent" xlink:to="lab_us-gaap_RegulatoryLiabilityNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_CommitmentsDisclosureTable_ecef3d8f-f6b4-40c6-8485-d68313250fb7_terseLabel_en-US" xlink:label="lab_aqunf_CommitmentsDisclosureTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitments Disclosure [Table]</link:label>
    <link:label id="lab_aqunf_CommitmentsDisclosureTable_label_en-US" xlink:label="lab_aqunf_CommitmentsDisclosureTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitments Disclosure [Table]</link:label>
    <link:label id="lab_aqunf_CommitmentsDisclosureTable_documentation_en-US" xlink:label="lab_aqunf_CommitmentsDisclosureTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitments Disclosure [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_CommitmentsDisclosureTable" xlink:href="aqunf-20201231.xsd#aqunf_CommitmentsDisclosureTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_CommitmentsDisclosureTable" xlink:to="lab_aqunf_CommitmentsDisclosureTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_8726b712-44f8-46bb-befc-daf3f2f9f7bd_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other comprehensive income (loss) (&#8220;OCI&#8221;):</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Comprehensive Income (Loss), Net of Tax [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_aa7c19a7-0762-453f-8118-d1c90037bf74_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2023</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payment, Year Three</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherLiabilitiesNoncurrent_9d3bc461-637e-4756-a15b-7e53a873ff13_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other long-term liabilities (note 12)</link:label>
    <link:label id="lab_us-gaap_OtherLiabilitiesNoncurrent_label_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Liabilities, Noncurrent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLiabilitiesNoncurrent" xlink:to="lab_us-gaap_OtherLiabilitiesNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DeferredIncomeTaxAssetsNet_aedab9ab-3853-4146-84e6-4b401b57a0ea_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxAssetsNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred income taxes (note 18)</link:label>
    <link:label id="lab_us-gaap_DeferredIncomeTaxAssetsNet_c9689956-8119-40fb-bc42-bc099be80957_verboseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxAssetsNet" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax assets</link:label>
    <link:label id="lab_us-gaap_DeferredIncomeTaxAssetsNet_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxAssetsNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Income Tax Assets, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredIncomeTaxAssetsNet" xlink:to="lab_us-gaap_DeferredIncomeTaxAssetsNet" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_3c198e68-61a6-4639-8e03-09e22be285ed_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends and issuance of shares under dividend reinvestment plan</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Issued During Period, Value, Dividend Reinvestment Plan</link:label>
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    <link:label id="lab_aqunf_IncomeTaxExpensesLineItems_documentation_en-US" xlink:label="lab_aqunf_IncomeTaxExpensesLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Expenses [Line Items]</link:label>
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    <link:label id="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_c7e7e849-55a3-4ae9-a97f-36d1cfff937c_terseLabel_en-US" xlink:label="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Effect of exchange rate differences on cash and restricted cash</link:label>
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    <link:label id="lab_aqunf_EnvironmentalRemediationRateRecoveryPeriod_ff4356c3-dce3-4588-b6f8-0b2239939f4f_terseLabel_en-US" xlink:label="lab_aqunf_EnvironmentalRemediationRateRecoveryPeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Environmental remediation, rate recovery period</link:label>
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    <link:label id="lab_aqunf_EnvironmentalRemediationRateRecoveryPeriod_documentation_en-US" xlink:label="lab_aqunf_EnvironmentalRemediationRateRecoveryPeriod" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Environmental Remediation, Rate Recovery Period</link:label>
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    <link:label id="lab_us-gaap_InvestmentIncomeMember_2dacbc79-f983-4e48-939d-04d54b7be162_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentIncomeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest, dividend and other income</link:label>
    <link:label id="lab_us-gaap_InvestmentIncomeMember_label_en-US" xlink:label="lab_us-gaap_InvestmentIncomeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment Income [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InvestmentIncomeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentIncomeMember" xlink:to="lab_us-gaap_InvestmentIncomeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_b4af46bc-76f6-4ac6-ba43-5e926e8685b1_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net earnings</link:label>
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_label_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest"/>
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    <link:label id="lab_aqunf_CanadianInvestmentsandSubsidiariesMember_212c16f3-e1c2-4944-88c7-db2c01d91fd9_terseLabel_en-US" xlink:label="lab_aqunf_CanadianInvestmentsandSubsidiariesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Canadian Investments and Subsidiaries</link:label>
    <link:label id="lab_aqunf_CanadianInvestmentsandSubsidiariesMember_label_en-US" xlink:label="lab_aqunf_CanadianInvestmentsandSubsidiariesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Canadian Investments and Subsidiaries [Member]</link:label>
    <link:label id="lab_aqunf_CanadianInvestmentsandSubsidiariesMember_documentation_en-US" xlink:label="lab_aqunf_CanadianInvestmentsandSubsidiariesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Canadian Investments and Subsidiaries [Member]</link:label>
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    <link:label id="lab_us-gaap_ElectricityGenerationPlantNonNuclearMember_059574ea-2a23-4b55-83bf-601cc8a0995f_terseLabel_en-US" xlink:label="lab_us-gaap_ElectricityGenerationPlantNonNuclearMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Power plant</link:label>
    <link:label id="lab_us-gaap_ElectricityGenerationPlantNonNuclearMember_label_en-US" xlink:label="lab_us-gaap_ElectricityGenerationPlantNonNuclearMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Electricity Generation Plant, Non-Nuclear [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ElectricityGenerationPlantNonNuclearMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ElectricityGenerationPlantNonNuclearMember"/>
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    <link:label id="lab_us-gaap_ConcentrationRiskPercentage1_881aa8a2-76e7-4f03-91a6-9cf0d26ce7e4_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskPercentage1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of revenue contributed by large utility customers</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskPercentage1_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskPercentage1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Concentration Risk, Percentage</link:label>
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    <link:label id="lab_aqunf_WindFacilityCapacity_27e02146-0f33-4153-b3d8-09323c4027ef_terseLabel_en-US" xlink:label="lab_aqunf_WindFacilityCapacity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Wind facility capacity (megawatt ac)</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_aqunf_WindFacilityCapacity" xlink:href="aqunf-20201231.xsd#aqunf_WindFacilityCapacity"/>
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    <link:label id="lab_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets_de2aa0cd-7d97-4a78-9556-d8c039c44c43_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair value of plan assets</link:label>
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecreaseAbstract_439d2697-0e4e-420f-bc6c-13451e23332e_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecreaseAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash provided by (used in):</link:label>
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    <link:label id="lab_us-gaap_StatementLineItems_4e32f396-1d48-406f-99bf-0d56456e5181_terseLabel_en-US" xlink:label="lab_us-gaap_StatementLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement [Line Items]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementLineItems" xlink:to="lab_us-gaap_StatementLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_U.S.DollarSeniorUnsecuredUtilityNotesMember_b2a65325-9b47-48d5-b9b6-34b37de4d333_terseLabel_en-US" xlink:label="lab_aqunf_U.S.DollarSeniorUnsecuredUtilityNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">U.S. Dollar Senior Unsecured Utility Notes</link:label>
    <link:label id="lab_aqunf_U.S.DollarSeniorUnsecuredUtilityNotesMember_label_en-US" xlink:label="lab_aqunf_U.S.DollarSeniorUnsecuredUtilityNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">U.S. Dollar Senior Unsecured Utility Notes [Member]</link:label>
    <link:label id="lab_aqunf_U.S.DollarSeniorUnsecuredUtilityNotesMember_documentation_en-US" xlink:label="lab_aqunf_U.S.DollarSeniorUnsecuredUtilityNotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">U.S. Dollar Senior Unsecured Utility Notes [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_U.S.DollarSeniorUnsecuredUtilityNotesMember" xlink:href="aqunf-20201231.xsd#aqunf_U.S.DollarSeniorUnsecuredUtilityNotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_U.S.DollarSeniorUnsecuredUtilityNotesMember" xlink:to="lab_aqunf_U.S.DollarSeniorUnsecuredUtilityNotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ClassOfStockDomain_b44451f8-e59a-40f8-ba7d-2dbe5c0523f2_terseLabel_en-US" xlink:label="lab_us-gaap_ClassOfStockDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Stock [Domain]</link:label>
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    <link:label id="lab_aqunf_TreasuryStockAmountReservedForIssuanceUnderThePlan_d8ece1b6-d326-432e-a57d-65d98a706ab9_terseLabel_en-US" xlink:label="lab_aqunf_TreasuryStockAmountReservedForIssuanceUnderThePlan" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Treasury atock, amount reserved for issuance under the plan</link:label>
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    <link:label id="lab_us-gaap_ForeignExchangeContractMember_eec39b8d-880a-4223-8971-22db40719641_terseLabel_en-US" xlink:label="lab_us-gaap_ForeignExchangeContractMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign exchange contract</link:label>
    <link:label id="lab_us-gaap_ForeignExchangeContractMember_label_en-US" xlink:label="lab_us-gaap_ForeignExchangeContractMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign Exchange Contract [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ForeignExchangeContractMember" xlink:to="lab_us-gaap_ForeignExchangeContractMember" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_MidWestWindDevelopmentProjectMember_ac750c31-30c6-4a55-bf22-efbfb7420555_terseLabel_en-US" xlink:label="lab_aqunf_MidWestWindDevelopmentProjectMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mid-west Wind Development Project</link:label>
    <link:label id="lab_aqunf_MidWestWindDevelopmentProjectMember_label_en-US" xlink:label="lab_aqunf_MidWestWindDevelopmentProjectMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mid-west Wind Development Project [Member]</link:label>
    <link:label id="lab_aqunf_MidWestWindDevelopmentProjectMember_documentation_en-US" xlink:label="lab_aqunf_MidWestWindDevelopmentProjectMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mid-west Wind Development Project</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_MidWestWindDevelopmentProjectMember" xlink:href="aqunf-20201231.xsd#aqunf_MidWestWindDevelopmentProjectMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_MidWestWindDevelopmentProjectMember" xlink:to="lab_aqunf_MidWestWindDevelopmentProjectMember" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_RetiredGeneratingPlantMember_3163934b-f15e-481f-8714-ea655c9dbf14_terseLabel_en-US" xlink:label="lab_aqunf_RetiredGeneratingPlantMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retired generating plant</link:label>
    <link:label id="lab_aqunf_RetiredGeneratingPlantMember_label_en-US" xlink:label="lab_aqunf_RetiredGeneratingPlantMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retired Generating Plant [Member]</link:label>
    <link:label id="lab_aqunf_RetiredGeneratingPlantMember_documentation_en-US" xlink:label="lab_aqunf_RetiredGeneratingPlantMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retired Generating Plant [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_RetiredGeneratingPlantMember" xlink:href="aqunf-20201231.xsd#aqunf_RetiredGeneratingPlantMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_RetiredGeneratingPlantMember" xlink:to="lab_aqunf_RetiredGeneratingPlantMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherAssetsNoncurrent_0eb2672d-b36f-4848-b9d4-7cae7b9c6e6e_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other assets (note 11)</link:label>
    <link:label id="lab_us-gaap_OtherAssetsNoncurrent_b8a56d19-3174-494a-bb55-567d1561f690_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other assets, noncurrent</link:label>
    <link:label id="lab_us-gaap_OtherAssetsNoncurrent_label_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Assets, Noncurrent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssetsNoncurrent" xlink:to="lab_us-gaap_OtherAssetsNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PlanNameAxis_5f92462d-ec86-455e-8b65-c1ccf3dd54c9_terseLabel_en-US" xlink:label="lab_us-gaap_PlanNameAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan Name [Axis]</link:label>
    <link:label id="lab_us-gaap_PlanNameAxis_label_en-US" xlink:label="lab_us-gaap_PlanNameAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan Name [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PlanNameAxis" xlink:to="lab_us-gaap_PlanNameAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_ERCOTNorthHUBExpiryDecember2027Member_8a38188f-e9dd-4d4b-8bf4-41a6c742587d_terseLabel_en-US" xlink:label="lab_aqunf_ERCOTNorthHUBExpiryDecember2027Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">ERCOT North HUB</link:label>
    <link:label id="lab_aqunf_ERCOTNorthHUBExpiryDecember2027Member_label_en-US" xlink:label="lab_aqunf_ERCOTNorthHUBExpiryDecember2027Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">ERCOT North HUB, Expiry December 2027 [Member]</link:label>
    <link:label id="lab_aqunf_ERCOTNorthHUBExpiryDecember2027Member_documentation_en-US" xlink:label="lab_aqunf_ERCOTNorthHUBExpiryDecember2027Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">ERCOT North HUB, Expiry December 2027 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_ERCOTNorthHUBExpiryDecember2027Member" xlink:href="aqunf-20201231.xsd#aqunf_ERCOTNorthHUBExpiryDecember2027Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_ERCOTNorthHUBExpiryDecember2027Member" xlink:to="lab_aqunf_ERCOTNorthHUBExpiryDecember2027Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EquityMethodInvestmentUnderlyingEquityInNetAssets_af3efbe4-dc34-4601-82fe-003bc78c4c8c_terseLabel_en-US" xlink:label="lab_us-gaap_EquityMethodInvestmentUnderlyingEquityInNetAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net assets</link:label>
    <link:label id="lab_us-gaap_EquityMethodInvestmentUnderlyingEquityInNetAssets_label_en-US" xlink:label="lab_us-gaap_EquityMethodInvestmentUnderlyingEquityInNetAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity Method Investment, Underlying Equity in Net Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentUnderlyingEquityInNetAssets" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityMethodInvestmentUnderlyingEquityInNetAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityMethodInvestmentUnderlyingEquityInNetAssets" xlink:to="lab_us-gaap_EquityMethodInvestmentUnderlyingEquityInNetAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueConcentrationOfRiskAccountsReceivable_b22d4383-4cc6-4019-8e8c-912c3851eb27_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueConcentrationOfRiskAccountsReceivable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts receivable</link:label>
    <link:label id="lab_us-gaap_FairValueConcentrationOfRiskAccountsReceivable_label_en-US" xlink:label="lab_us-gaap_FairValueConcentrationOfRiskAccountsReceivable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value, Concentration of Risk, Accounts Receivable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueConcentrationOfRiskAccountsReceivable" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueConcentrationOfRiskAccountsReceivable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueConcentrationOfRiskAccountsReceivable" xlink:to="lab_us-gaap_FairValueConcentrationOfRiskAccountsReceivable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_GainLossOnSaleOfInvestments_b23d5a42-bb31-46ea-8a82-92818a663ea9_terseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfInvestments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain (loss) on sale of investments</link:label>
    <link:label id="lab_us-gaap_GainLossOnSaleOfInvestments_label_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfInvestments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain (Loss) on Sale of Investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfInvestments" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnSaleOfInvestments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnSaleOfInvestments" xlink:to="lab_us-gaap_GainLossOnSaleOfInvestments" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_PropertyPlantAndEquipmentDisclosureTable_4dc00825-8dc6-4926-8ed3-813d11773b2c_terseLabel_en-US" xlink:label="lab_aqunf_PropertyPlantAndEquipmentDisclosureTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant, and Equipment Disclosure [Table]</link:label>
    <link:label id="lab_aqunf_PropertyPlantAndEquipmentDisclosureTable_label_en-US" xlink:label="lab_aqunf_PropertyPlantAndEquipmentDisclosureTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property Plant And Equipment Disclosure [Table]</link:label>
    <link:label id="lab_aqunf_PropertyPlantAndEquipmentDisclosureTable_documentation_en-US" xlink:label="lab_aqunf_PropertyPlantAndEquipmentDisclosureTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant, and Equipment Disclosure [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_PropertyPlantAndEquipmentDisclosureTable" xlink:href="aqunf-20201231.xsd#aqunf_PropertyPlantAndEquipmentDisclosureTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_PropertyPlantAndEquipmentDisclosureTable" xlink:to="lab_aqunf_PropertyPlantAndEquipmentDisclosureTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_Assets_80d4b350-3bbb-4c62-b033-992c926dea81_totalLabel_en-US" xlink:label="lab_us-gaap_Assets" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets</link:label>
    <link:label id="lab_us-gaap_Assets_a43bfc6b-6822-48c5-bd69-a1eee30aa960_netLabel_en-US" xlink:label="lab_us-gaap_Assets" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Generating assets of Long Sault</link:label>
    <link:label id="lab_us-gaap_Assets_ecaa9a8a-e816-4f7b-b9c6-33d717074aee_terseLabel_en-US" xlink:label="lab_us-gaap_Assets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets</link:label>
    <link:label id="lab_us-gaap_Assets_dc11f196-a699-4a22-9723-ee42da007154_verboseLabel_en-US" xlink:label="lab_us-gaap_Assets" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total assets</link:label>
    <link:label id="lab_us-gaap_Assets_label_en-US" xlink:label="lab_us-gaap_Assets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Assets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Assets" xlink:to="lab_us-gaap_Assets" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_c6684c67-cc69-4e43-b696-2d9567f681c3_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related party transactions</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related Party Transactions Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionsDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:to="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_DefinedContributionPlanEmployerMatchingContributionFullyVestedPeriodOfServiceMinimum_edbd7769-3388-4fcf-bd44-3a2ca63da184_terseLabel_en-US" xlink:label="lab_aqunf_DefinedContributionPlanEmployerMatchingContributionFullyVestedPeriodOfServiceMinimum" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vesting period of matching contribution shares</link:label>
    <link:label id="lab_aqunf_DefinedContributionPlanEmployerMatchingContributionFullyVestedPeriodOfServiceMinimum_label_en-US" xlink:label="lab_aqunf_DefinedContributionPlanEmployerMatchingContributionFullyVestedPeriodOfServiceMinimum" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Contribution Plan Employer Matching Contribution Fully Vested Period Of Service Minimum</link:label>
    <link:label id="lab_aqunf_DefinedContributionPlanEmployerMatchingContributionFullyVestedPeriodOfServiceMinimum_documentation_en-US" xlink:label="lab_aqunf_DefinedContributionPlanEmployerMatchingContributionFullyVestedPeriodOfServiceMinimum" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Contribution Plan Employer Matching Contribution Fully Vested Period Of Service Minimum</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_DefinedContributionPlanEmployerMatchingContributionFullyVestedPeriodOfServiceMinimum" xlink:href="aqunf-20201231.xsd#aqunf_DefinedContributionPlanEmployerMatchingContributionFullyVestedPeriodOfServiceMinimum"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_DefinedContributionPlanEmployerMatchingContributionFullyVestedPeriodOfServiceMinimum" xlink:to="lab_aqunf_DefinedContributionPlanEmployerMatchingContributionFullyVestedPeriodOfServiceMinimum" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_TaxYears20212026Member_76b28a5b-15c4-49f1-bd8d-d02618861301_terseLabel_en-US" xlink:label="lab_aqunf_TaxYears20212026Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax Years 2021-2026</link:label>
    <link:label id="lab_aqunf_TaxYears20212026Member_label_en-US" xlink:label="lab_aqunf_TaxYears20212026Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax Years 2021-2026 [Member]</link:label>
    <link:label id="lab_aqunf_TaxYears20212026Member_documentation_en-US" xlink:label="lab_aqunf_TaxYears20212026Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax Years 2021-2026</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_TaxYears20212026Member" xlink:href="aqunf-20201231.xsd#aqunf_TaxYears20212026Member"/>
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    <link:label id="lab_us-gaap_DebtConversionConvertedInstrumentSharesIssued1_bae9a9b8-cf67-4b7c-abe1-1c99596fcb3c_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtConversionConvertedInstrumentSharesIssued1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Conversion of convertible debentures (in shares)</link:label>
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    <link:label id="lab_aqunf_ISONESpotRateContractExpiringFebruary2022Member_d11381ad-e5b4-4aa1-b0b3-e70917d7861b_terseLabel_en-US" xlink:label="lab_aqunf_ISONESpotRateContractExpiringFebruary2022Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">ISO NE Spot Rate contract expiring February 2022</link:label>
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    <link:label id="lab_srt_ContractualObligationFiscalYearMaturityScheduleTableTextBlock_22e8f478-a86a-4908-ae2a-f2557cb9de37_terseLabel_en-US" xlink:label="lab_srt_ContractualObligationFiscalYearMaturityScheduleTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities Maturity Profile</link:label>
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    <link:label id="lab_us-gaap_Liabilities_cf81e4ff-fbf2-4fef-affd-76dde97be512_totalLabel_en-US" xlink:label="lab_us-gaap_Liabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities</link:label>
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    <link:label id="lab_aqunf_NoncontrollingInterestDisposedAmount_abec7321-0f72-4489-8ba3-9dafce9ae61b_terseLabel_en-US" xlink:label="lab_aqunf_NoncontrollingInterestDisposedAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ownership interest sold</link:label>
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    <link:label id="lab_us-gaap_LossContingencyDamagesSoughtValue_05fd8770-73ef-4c9c-b95a-50c1c05fd221_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingencyDamagesSoughtValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Damages claimed by other party in lawsuit</link:label>
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    <link:label id="lab_aqunf_HookUpFeeLiability_documentation_en-US" xlink:label="lab_aqunf_HookUpFeeLiability" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hook-up Fee Liability</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_50586510-448b-4713-ad18-5c88fc5c94d1_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Related Party Transactions, by Related Party [Table]</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfStockByClassTextBlock_17c4293b-537f-481a-91b8-79dea135d630_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfStockByClassTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Shares Issued and Outstanding</link:label>
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    <link:label id="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_1abab4f5-20ed-4828-b5d2-e7b417c2c263_terseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitments and Contingencies Disclosure [Abstract]</link:label>
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    <link:label id="lab_us-gaap_FairValueInputsLevel1Member_2e98fddd-a197-40d0-b091-2767f1256f31_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Level 1</link:label>
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    <link:label id="lab_us-gaap_RegulatedOperationsAbstract_21283c7a-398c-49d3-9c92-ea48a87294e9_terseLabel_en-US" xlink:label="lab_us-gaap_RegulatedOperationsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulated Operations [Abstract]</link:label>
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    <link:label id="lab_us-gaap_DebtWeightedAverageInterestRate_f733f187-2c60-4f3d-864d-31e4224dc1e5_terseLabel_en-US" xlink:label="lab_us-gaap_DebtWeightedAverageInterestRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average coupon</link:label>
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    <link:label id="lab_us-gaap_LegalEntityTypeOfCounterpartyDomain_fc243138-90df-4e8a-8ee7-429b92e85680_terseLabel_en-US" xlink:label="lab_us-gaap_LegalEntityTypeOfCounterpartyDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Legal Entity Type of Counterparty [Domain]</link:label>
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    <link:label id="lab_aqunf_CapitalExpenditureShortfallRefundableToCustomersPercent_432db9b6-ad57-47d7-ba4b-eaed69dcb939_terseLabel_en-US" xlink:label="lab_aqunf_CapitalExpenditureShortfallRefundableToCustomersPercent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital expenditure shortfall refundable to customers (percent)</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_aqunf_CapitalExpenditureShortfallRefundableToCustomersPercent" xlink:href="aqunf-20201231.xsd#aqunf_CapitalExpenditureShortfallRefundableToCustomersPercent"/>
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    <link:label id="lab_aqunf_DividendsLineItems_documentation_en-US" xlink:label="lab_aqunf_DividendsLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends [Line Items]</link:label>
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    <link:label id="lab_us-gaap_RegulatoryAgencyAxis_e4341cb5-15fd-475e-a5fa-dc2172582bda_terseLabel_en-US" xlink:label="lab_us-gaap_RegulatoryAgencyAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulatory Agency [Axis]</link:label>
    <link:label id="lab_us-gaap_RegulatoryAgencyAxis_label_en-US" xlink:label="lab_us-gaap_RegulatoryAgencyAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulatory Agency [Axis]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RegulatoryAgencyAxis" xlink:to="lab_us-gaap_RegulatoryAgencyAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_OtherNoncontrollingInterestMember_5acab96c-4b6c-451c-867b-bc99793b2142_terseLabel_en-US" xlink:label="lab_aqunf_OtherNoncontrollingInterestMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Noncontrolling Interests</link:label>
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    <link:label id="lab_aqunf_OtherNoncontrollingInterestMember_documentation_en-US" xlink:label="lab_aqunf_OtherNoncontrollingInterestMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Noncontrolling Interest [Member]</link:label>
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    <link:label id="lab_us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest_48bb3d3e-3418-4c4c-a5e0-20db61357d4c_terseLabel_en-US" xlink:label="lab_us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contributions from redeemable non-controlling interests</link:label>
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    <link:label id="lab_us-gaap_AdditionalPaidInCapitalMember_d62a0006-ce96-470b-8aef-386001c29968_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additional paid-in capital</link:label>
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    <link:label id="lab_us-gaap_OtherAssets_8caf0173-5aa1-490d-8953-d7ce935f84fa_totalLabel_en-US" xlink:label="lab_us-gaap_OtherAssets" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total other assets</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssets" xlink:to="lab_us-gaap_OtherAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherOperatingActivitiesCashFlowStatement_404711d6-fe18-4c99-91fe-e6655a52869f_terseLabel_en-US" xlink:label="lab_us-gaap_OtherOperatingActivitiesCashFlowStatement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Others</link:label>
    <link:label id="lab_us-gaap_OtherOperatingActivitiesCashFlowStatement_label_en-US" xlink:label="lab_us-gaap_OtherOperatingActivitiesCashFlowStatement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Operating Activities, Cash Flow Statement</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherOperatingActivitiesCashFlowStatement" xlink:to="lab_us-gaap_OtherOperatingActivitiesCashFlowStatement" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueByAssetClassAxis_4d09f440-e50c-4690-98cf-f2b3b30e7bd0_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByAssetClassAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment, Type [Axis]</link:label>
    <link:label id="lab_us-gaap_FairValueByAssetClassAxis_label_en-US" xlink:label="lab_us-gaap_FairValueByAssetClassAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Class [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByAssetClassAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByAssetClassAxis" xlink:to="lab_us-gaap_FairValueByAssetClassAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted_a8400431-ec02-42b0-80a1-9a7820897c7b_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Granted, including dividends (in shares)</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MinorityInterestDecreaseFromRedemptions" xlink:to="lab_us-gaap_MinorityInterestDecreaseFromRedemptions" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockSharesOutstanding_4355be50-1e5f-404c-ad8b-b8931efb31cf_periodStartLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Beginning balance (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesOutstanding_d84c4eba-17f5-4963-98b9-2504548b5dc3_periodEndLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ending balance (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesOutstanding_label_en-US" xlink:label="lab_us-gaap_CommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common Stock, Shares, Outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesOutstanding" xlink:to="lab_us-gaap_CommonStockSharesOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EquityMethodInvestments_f81cc9b6-8116-41ed-a446-268756ad01f9_verboseLabel_en-US" xlink:label="lab_us-gaap_EquityMethodInvestments" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity method investments</link:label>
    <link:label id="lab_us-gaap_EquityMethodInvestments_66ef249f-7fc6-4e3e-8ae5-3142adae3acd_netLabel_en-US" xlink:label="lab_us-gaap_EquityMethodInvestments" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">AQN's investment carrying amount for the entities</link:label>
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    <link:label id="lab_us-gaap_EquityMethodInvestments_label_en-US" xlink:label="lab_us-gaap_EquityMethodInvestments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity Method Investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityMethodInvestments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityMethodInvestments" xlink:to="lab_us-gaap_EquityMethodInvestments" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DeferredTaxAssetsNetAbstract_110507d8-43a8-4dc7-a194-f19c8ed18e10_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsNetAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax assets:</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsNetAbstract_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsNetAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Tax Assets, Net [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNetAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredTaxAssetsNetAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract" xlink:to="lab_us-gaap_DeferredTaxAssetsNetAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeTaxDisclosureAbstract_0e25e715-3925-4a77-b753-b0e8a7e95db8_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Disclosure [Abstract]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract" xlink:to="lab_us-gaap_IncomeTaxDisclosureAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_OtherDevelopmentProjectsMember_bcb9f8bd-3faa-414e-8949-0dea2c55ee3f_terseLabel_en-US" xlink:label="lab_aqunf_OtherDevelopmentProjectsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Development Projects</link:label>
    <link:label id="lab_aqunf_OtherDevelopmentProjectsMember_label_en-US" xlink:label="lab_aqunf_OtherDevelopmentProjectsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Development Projects [Member]</link:label>
    <link:label id="lab_aqunf_OtherDevelopmentProjectsMember_documentation_en-US" xlink:label="lab_aqunf_OtherDevelopmentProjectsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Development Projects</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_OtherDevelopmentProjectsMember" xlink:href="aqunf-20201231.xsd#aqunf_OtherDevelopmentProjectsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_OtherDevelopmentProjectsMember" xlink:to="lab_aqunf_OtherDevelopmentProjectsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RevolvingCreditFacilityMember_6e0970ae-710a-45a2-af94-39b165f4fe12_terseLabel_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revolving Credit Facility</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevolvingCreditFacilityMember" xlink:to="lab_us-gaap_RevolvingCreditFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_c0aabf88-d726-495c-9493-a8475481f4d9_totalLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings before income taxes</link:label>
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_label_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_InterestRateSwapOneMember_2d2078a4-d810-41c0-9d2e-6b182ed461c7_terseLabel_en-US" xlink:label="lab_aqunf_InterestRateSwapOneMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest Rate Swap One</link:label>
    <link:label id="lab_aqunf_InterestRateSwapOneMember_label_en-US" xlink:label="lab_aqunf_InterestRateSwapOneMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest Rate Swap One [Member]</link:label>
    <link:label id="lab_aqunf_InterestRateSwapOneMember_documentation_en-US" xlink:label="lab_aqunf_InterestRateSwapOneMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest Rate Swap One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_InterestRateSwapOneMember" xlink:href="aqunf-20201231.xsd#aqunf_InterestRateSwapOneMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_InterestRateSwapOneMember" xlink:to="lab_aqunf_InterestRateSwapOneMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeTermOfContract_9a58e816-a0ad-47be-8c66-7a73479a6ad2_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeTermOfContract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Term of forward-starting interest rate swap</link:label>
    <link:label id="lab_us-gaap_DerivativeTermOfContract_label_en-US" xlink:label="lab_us-gaap_DerivativeTermOfContract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Term of Contract</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTermOfContract" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeTermOfContract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeTermOfContract" xlink:to="lab_us-gaap_DerivativeTermOfContract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentMember_a5e52a3d-6fce-4fa0-a9a7-5b514029f8b9_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentMember_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentMember" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_DefinedBenefitPlanNonserviceCostsTotal_bb1cc437-b6ee-4740-b72c-4e2324c03bc4_negatedLabel_en-US" xlink:label="lab_aqunf_DefinedBenefitPlanNonserviceCostsTotal" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pension and other post-employment non-service costs (note 10)</link:label>
    <link:label id="lab_aqunf_DefinedBenefitPlanNonserviceCostsTotal_dfbe7c06-d2e0-4738-99e0-67a575a8ea23_totalLabel_en-US" xlink:label="lab_aqunf_DefinedBenefitPlanNonserviceCostsTotal" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Non-service Costs, Total</link:label>
    <link:label id="lab_aqunf_DefinedBenefitPlanNonserviceCostsTotal_label_en-US" xlink:label="lab_aqunf_DefinedBenefitPlanNonserviceCostsTotal" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Non-service Costs, Total</link:label>
    <link:label id="lab_aqunf_DefinedBenefitPlanNonserviceCostsTotal_documentation_en-US" xlink:label="lab_aqunf_DefinedBenefitPlanNonserviceCostsTotal" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Non-service Costs, Total</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_DefinedBenefitPlanNonserviceCostsTotal" xlink:href="aqunf-20201231.xsd#aqunf_DefinedBenefitPlanNonserviceCostsTotal"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_DefinedBenefitPlanNonserviceCostsTotal" xlink:to="lab_aqunf_DefinedBenefitPlanNonserviceCostsTotal" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_5d525dc5-dad2-42f8-98a1-67244f2b2895_periodStartLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Beginning balance (CAD per share)</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_117377f3-1ae8-4156-b136-c90a6ddd36e1_periodEndLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ending balance (CAD per share)</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_35edb25a-9599-42f3-b2a1-705e35f63c5e_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisitions of operating entities (note 3)</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments to Acquire Businesses, Net of Cash Acquired</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:to="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_f3859206-5187-4589-9042-1b7acd7bf762_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ownership interest acquired (percent)</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Acquisition, Percentage of Voting Interests Acquired</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:to="lab_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentGross_80e70a31-1e3f-48b6-bf7c-5bd88753ef1a_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentGross" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cost</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentGross_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentGross" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment, Gross</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentGross" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentGross" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressesAddressTypeAxis_d473d4cb-9ccb-4ce3-9582-1a3cb1af6d4e_terseLabel_en-US" xlink:label="lab_dei_EntityAddressesAddressTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Addresses, Address Type [Axis]</link:label>
    <link:label id="lab_dei_EntityAddressesAddressTypeAxis_label_en-US" xlink:label="lab_dei_EntityAddressesAddressTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Addresses, Address Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesAddressTypeAxis" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityAddressesAddressTypeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressesAddressTypeAxis" xlink:to="lab_dei_EntityAddressesAddressTypeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_f5436705-f762-4827-bba7-1f2cfce759d8_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2022</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payment, Year Two</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_909b96ab-4d62-4131-9f56-605fc732a3f9_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Results of Operations and Assets for Segments</link:label>
    <link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Segment Reporting Information, by Segment [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:to="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_f378a8ec-d37d-4c3c-8376-33eb6ed765a7_totalLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unfunded status</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Funded (Unfunded) Status of Plan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlan"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:to="lab_us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_SignificantAccountingPoliciesLineItems_001f1611-e333-45e5-90a7-ad564bfb9a1a_terseLabel_en-US" xlink:label="lab_aqunf_SignificantAccountingPoliciesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant Accounting Policies [Line Items]</link:label>
    <link:label id="lab_aqunf_SignificantAccountingPoliciesLineItems_label_en-US" xlink:label="lab_aqunf_SignificantAccountingPoliciesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant Accounting Policies [Line Items]</link:label>
    <link:label id="lab_aqunf_SignificantAccountingPoliciesLineItems_documentation_en-US" xlink:label="lab_aqunf_SignificantAccountingPoliciesLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant Accounting Policies [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_SignificantAccountingPoliciesLineItems" xlink:href="aqunf-20201231.xsd#aqunf_SignificantAccountingPoliciesLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_SignificantAccountingPoliciesLineItems" xlink:to="lab_aqunf_SignificantAccountingPoliciesLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeStatementAbstract_44b12c2d-6b92-4d95-98a4-c1290a438855_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeStatementAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Statement [Abstract]</link:label>
    <link:label id="lab_us-gaap_IncomeStatementAbstract_label_en-US" xlink:label="lab_us-gaap_IncomeStatementAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Statement [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementAbstract" xlink:to="lab_us-gaap_IncomeStatementAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_b053f927-5adb-43c2-99d4-be95622ec904_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated OCI</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">AOCI Attributable to Parent [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_UseOfEstimates_d2f4b49f-af4c-4bf7-8e90-9ed7c1a215df_terseLabel_en-US" xlink:label="lab_us-gaap_UseOfEstimates" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Use of estimates</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfRegulatoryLiabilitiesTable" xlink:to="lab_us-gaap_ScheduleOfRegulatoryLiabilitiesTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember_e90f6d4d-f72b-40f9-8225-2898b27fd214_terseLabel_en-US" xlink:label="lab_us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total</link:label>
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    <link:label id="lab_aqunf_APUCMember_ef3225ed-930d-4752-b78e-69f4fb230fc4_terseLabel_en-US" xlink:label="lab_aqunf_APUCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">APUC</link:label>
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    <link:label id="lab_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_019af4f9-f6b5-4e57-bc00-88cf313c5c3a_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shares surrendered to fund withholding taxes on exercised share options</link:label>
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    <link:label id="lab_aqunf_DefinedBenefitPlanAmortizationOfRegulatoryAssetsandLiabilities_documentation_en-US" xlink:label="lab_aqunf_DefinedBenefitPlanAmortizationOfRegulatoryAssetsandLiabilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan Amortization Of Regulatory Assets and Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_DefinedBenefitPlanAmortizationOfRegulatoryAssetsandLiabilities" xlink:href="aqunf-20201231.xsd#aqunf_DefinedBenefitPlanAmortizationOfRegulatoryAssetsandLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_DefinedBenefitPlanAmortizationOfRegulatoryAssetsandLiabilities" xlink:to="lab_aqunf_DefinedBenefitPlanAmortizationOfRegulatoryAssetsandLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_9df79cd0-25bc-4ac5-8dac-bf9ebbe37ed9_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Estimated useful lives</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment, Useful Life</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_DisclosureCashDividendsAbstract_4168a422-8b77-435d-ab86-9eab13601dde_terseLabel_en-US" xlink:label="lab_aqunf_DisclosureCashDividendsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Cash Dividends [Abstract]</link:label>
    <link:label id="lab_aqunf_DisclosureCashDividendsAbstract_label_en-US" xlink:label="lab_aqunf_DisclosureCashDividendsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Cash Dividends [Abstract]</link:label>
    <link:label id="lab_aqunf_DisclosureCashDividendsAbstract_documentation_en-US" xlink:label="lab_aqunf_DisclosureCashDividendsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure - Cash Dividends - Additional Information [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_DisclosureCashDividendsAbstract" xlink:href="aqunf-20201231.xsd#aqunf_DisclosureCashDividendsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_DisclosureCashDividendsAbstract" xlink:to="lab_aqunf_DisclosureCashDividendsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_EnergyNorthGasSystemMember_6d7a8b2f-f7ae-4df1-be47-45205b1a2841_terseLabel_en-US" xlink:label="lab_aqunf_EnergyNorthGasSystemMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Energy North Gas System</link:label>
    <link:label id="lab_aqunf_EnergyNorthGasSystemMember_label_en-US" xlink:label="lab_aqunf_EnergyNorthGasSystemMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Energy North Gas System [Member]</link:label>
    <link:label id="lab_aqunf_EnergyNorthGasSystemMember_documentation_en-US" xlink:label="lab_aqunf_EnergyNorthGasSystemMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Energy North Gas System [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_EnergyNorthGasSystemMember" xlink:href="aqunf-20201231.xsd#aqunf_EnergyNorthGasSystemMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_EnergyNorthGasSystemMember" xlink:to="lab_aqunf_EnergyNorthGasSystemMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccrualForEnvironmentalLossContingenciesDiscountRate_4c345824-d1be-4c32-b4a4-c80a3cf29bd1_terseLabel_en-US" xlink:label="lab_us-gaap_AccrualForEnvironmentalLossContingenciesDiscountRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrual for environmental cleanup, discount rate (percent)</link:label>
    <link:label id="lab_us-gaap_AccrualForEnvironmentalLossContingenciesDiscountRate_label_en-US" xlink:label="lab_us-gaap_AccrualForEnvironmentalLossContingenciesDiscountRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrual for Environmental Loss Contingencies, Discount Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccrualForEnvironmentalLossContingenciesDiscountRate" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccrualForEnvironmentalLossContingenciesDiscountRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccrualForEnvironmentalLossContingenciesDiscountRate" xlink:to="lab_us-gaap_AccrualForEnvironmentalLossContingenciesDiscountRate" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_AffiliatedEntityMember_0375db39-8b68-4ba2-8238-1c5ef9049c5d_terseLabel_en-US" xlink:label="lab_srt_AffiliatedEntityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">AIP</link:label>
    <link:label id="lab_srt_AffiliatedEntityMember_07cf26de-0557-4e8c-8656-7d3a8444df6d_verboseLabel_en-US" xlink:label="lab_srt_AffiliatedEntityMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related Party</link:label>
    <link:label id="lab_srt_AffiliatedEntityMember_label_en-US" xlink:label="lab_srt_AffiliatedEntityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Affiliated Entity [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AffiliatedEntityMember" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_AffiliatedEntityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_AffiliatedEntityMember" xlink:to="lab_srt_AffiliatedEntityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueDisclosuresAbstract_32d26e0c-259e-4a21-a270-21be5b39faa3_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value Disclosures [Abstract]</link:label>
    <link:label id="lab_us-gaap_FairValueDisclosuresAbstract_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value Disclosures [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueDisclosuresAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract" xlink:to="lab_us-gaap_FairValueDisclosuresAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongTermInvestmentsAbstract_1cd9ab90-8fbd-47e0-b111-9874c18b439a_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermInvestmentsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term investments</link:label>
    <link:label id="lab_us-gaap_LongTermInvestmentsAbstract_label_en-US" xlink:label="lab_us-gaap_LongTermInvestmentsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Investments [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermInvestmentsAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermInvestmentsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermInvestmentsAbstract" xlink:to="lab_us-gaap_LongTermInvestmentsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_DefinedBenefitPlanUltimateHealthCareCostInflationRate_6785d520-ccdf-4cd3-a4f6-fc1512effa8c_terseLabel_en-US" xlink:label="lab_aqunf_DefinedBenefitPlanUltimateHealthCareCostInflationRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assumed Ultimate Medical Inflation Rate</link:label>
    <link:label id="lab_aqunf_DefinedBenefitPlanUltimateHealthCareCostInflationRate_label_en-US" xlink:label="lab_aqunf_DefinedBenefitPlanUltimateHealthCareCostInflationRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan Ultimate Health Care Cost Inflation Rate</link:label>
    <link:label id="lab_aqunf_DefinedBenefitPlanUltimateHealthCareCostInflationRate_documentation_en-US" xlink:label="lab_aqunf_DefinedBenefitPlanUltimateHealthCareCostInflationRate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Ultimate Health Care Cost, Inflation Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_DefinedBenefitPlanUltimateHealthCareCostInflationRate" xlink:href="aqunf-20201231.xsd#aqunf_DefinedBenefitPlanUltimateHealthCareCostInflationRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_DefinedBenefitPlanUltimateHealthCareCostInflationRate" xlink:to="lab_aqunf_DefinedBenefitPlanUltimateHealthCareCostInflationRate" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_Reclassifications_fd09b4ee-f01d-4a76-bb49-346346db1fee_terseLabel_en-US" xlink:label="lab_us-gaap_Reclassifications" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Comparative figures</link:label>
    <link:label id="lab_us-gaap_Reclassifications_label_en-US" xlink:label="lab_us-gaap_Reclassifications" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reclassifications [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Reclassifications" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Reclassifications"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Reclassifications" xlink:to="lab_us-gaap_Reclassifications" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherNonoperatingGainsLosses_ad81a202-29e2-4fe1-a3ad-ec735e227716_terseLabel_en-US" xlink:label="lab_us-gaap_OtherNonoperatingGainsLosses" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_OtherNonoperatingGainsLosses_label_en-US" xlink:label="lab_us-gaap_OtherNonoperatingGainsLosses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Nonoperating Gains (Losses)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingGainsLosses" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherNonoperatingGainsLosses"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherNonoperatingGainsLosses" xlink:to="lab_us-gaap_OtherNonoperatingGainsLosses" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_AwardMatchAxis_0fa3b4be-dea1-497b-9a83-19dc288019bf_terseLabel_en-US" xlink:label="lab_aqunf_AwardMatchAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Award Match [Axis]</link:label>
    <link:label id="lab_aqunf_AwardMatchAxis_label_en-US" xlink:label="lab_aqunf_AwardMatchAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Award Match [Axis]</link:label>
    <link:label id="lab_aqunf_AwardMatchAxis_documentation_en-US" xlink:label="lab_aqunf_AwardMatchAxis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Award Match</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_AwardMatchAxis" xlink:href="aqunf-20201231.xsd#aqunf_AwardMatchAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_AwardMatchAxis" xlink:to="lab_aqunf_AwardMatchAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock_f7d02899-4b23-4e84-bfbd-39beee44e0a3_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Expense</link:label>
    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Payment Arrangement, Activity [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock" xlink:to="lab_us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherRegulatoryAssetsLiabilitiesMember_740cca66-3129-4573-9c37-aebcbe63d1d4_terseLabel_en-US" xlink:label="lab_us-gaap_OtherRegulatoryAssetsLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_OtherRegulatoryAssetsLiabilitiesMember_label_en-US" xlink:label="lab_us-gaap_OtherRegulatoryAssetsLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Regulatory Assets (Liabilities) [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherRegulatoryAssetsLiabilitiesMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherRegulatoryAssetsLiabilitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherRegulatoryAssetsLiabilitiesMember" xlink:to="lab_us-gaap_OtherRegulatoryAssetsLiabilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_RevenueCollectionPeriod_14a3e8f1-9472-4dcb-8ed5-8109f012fea3_terseLabel_en-US" xlink:label="lab_aqunf_RevenueCollectionPeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue collection period</link:label>
    <link:label id="lab_aqunf_RevenueCollectionPeriod_label_en-US" xlink:label="lab_aqunf_RevenueCollectionPeriod" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue Collection Period</link:label>
    <link:label id="lab_aqunf_RevenueCollectionPeriod_documentation_en-US" xlink:label="lab_aqunf_RevenueCollectionPeriod" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue Collection Period</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_RevenueCollectionPeriod" xlink:href="aqunf-20201231.xsd#aqunf_RevenueCollectionPeriod"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_RevenueCollectionPeriod" xlink:to="lab_aqunf_RevenueCollectionPeriod" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_RateCaseCostsMember_bebd082b-f332-4ca9-92c0-4fa6afc81506_terseLabel_en-US" xlink:label="lab_aqunf_RateCaseCostsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rate review costs</link:label>
    <link:label id="lab_aqunf_RateCaseCostsMember_label_en-US" xlink:label="lab_aqunf_RateCaseCostsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rate Case Costs [Member]</link:label>
    <link:label id="lab_aqunf_RateCaseCostsMember_documentation_en-US" xlink:label="lab_aqunf_RateCaseCostsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rate Case Costs [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_RateCaseCostsMember" xlink:href="aqunf-20201231.xsd#aqunf_RateCaseCostsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_RateCaseCostsMember" xlink:to="lab_aqunf_RateCaseCostsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_LongtermInvestmentsFairValue_a4682e79-0f97-4b15-a352-b9d396c40937_terseLabel_en-US" xlink:label="lab_aqunf_LongtermInvestmentsFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term investments carried at fair value</link:label>
    <link:label id="lab_aqunf_LongtermInvestmentsFairValue_label_en-US" xlink:label="lab_aqunf_LongtermInvestmentsFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Investments, Fair Value</link:label>
    <link:label id="lab_aqunf_LongtermInvestmentsFairValue_documentation_en-US" xlink:label="lab_aqunf_LongtermInvestmentsFairValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Investments, Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_LongtermInvestmentsFairValue" xlink:href="aqunf-20201231.xsd#aqunf_LongtermInvestmentsFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_LongtermInvestmentsFairValue" xlink:to="lab_aqunf_LongtermInvestmentsFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAmountOfLossRecoveryOnPlantAbandonment_b2e98015-1518-4ae5-90ff-4b1137ce83e8_terseLabel_en-US" xlink:label="lab_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAmountOfLossRecoveryOnPlantAbandonment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Abandonment loss</link:label>
    <link:label id="lab_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAmountOfLossRecoveryOnPlantAbandonment_label_en-US" xlink:label="lab_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAmountOfLossRecoveryOnPlantAbandonment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Public Utilities, Property, Plant and Equipment, Amount of Loss (Recovery) on Plant Abandonment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAmountOfLossRecoveryOnPlantAbandonment" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAmountOfLossRecoveryOnPlantAbandonment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAmountOfLossRecoveryOnPlantAbandonment" xlink:to="lab_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAmountOfLossRecoveryOnPlantAbandonment" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_EquityMethodInvestmentFairValueGainLoss_8090b41f-1afa-4eeb-9f9b-a66b6083a088_verboseLabel_en-US" xlink:label="lab_aqunf_EquityMethodInvestmentFairValueGainLoss" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair value gain (loss) on investments</link:label>
    <link:label id="lab_aqunf_EquityMethodInvestmentFairValueGainLoss_43d993eb-6c7d-428a-a805-e7150c5fa8a9_terseLabel_en-US" xlink:label="lab_aqunf_EquityMethodInvestmentFairValueGainLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair value loss</link:label>
    <link:label id="lab_aqunf_EquityMethodInvestmentFairValueGainLoss_db823871-6c00-4730-8851-0a86dcb2a70b_negatedTerseLabel_en-US" xlink:label="lab_aqunf_EquityMethodInvestmentFairValueGainLoss" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair value loss</link:label>
    <link:label id="lab_aqunf_EquityMethodInvestmentFairValueGainLoss_label_en-US" xlink:label="lab_aqunf_EquityMethodInvestmentFairValueGainLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity Method Investment, Fair Value (Gain) Loss</link:label>
    <link:label id="lab_aqunf_EquityMethodInvestmentFairValueGainLoss_documentation_en-US" xlink:label="lab_aqunf_EquityMethodInvestmentFairValueGainLoss" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity Method Investment, Fair Value (Gain) Loss</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_EquityMethodInvestmentFairValueGainLoss" xlink:href="aqunf-20201231.xsd#aqunf_EquityMethodInvestmentFairValueGainLoss"/>
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    <link:label id="lab_us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis_29c523e3-6f9d-4886-af71-492c1d242128_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Legal Entity of Counterparty, Type [Axis]</link:label>
    <link:label id="lab_us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis_label_en-US" xlink:label="lab_us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Legal Entity of Counterparty, Type [Axis]</link:label>
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    <link:label id="lab_us-gaap_LandMember_b9432069-a9c8-49bd-822b-fe1a24b96911_terseLabel_en-US" xlink:label="lab_us-gaap_LandMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Land</link:label>
    <link:label id="lab_us-gaap_LandMember_label_en-US" xlink:label="lab_us-gaap_LandMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Land [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LandMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LandMember" xlink:to="lab_us-gaap_LandMember" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_CumulativeOwnershipInterestAcquired_6fdc0474-3e35-4cce-bce0-00b8f8f5535f_terseLabel_en-US" xlink:label="lab_aqunf_CumulativeOwnershipInterestAcquired" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cumulative ownership interest acquired (percent)</link:label>
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    <link:label id="lab_aqunf_CumulativeOwnershipInterestAcquired_documentation_en-US" xlink:label="lab_aqunf_CumulativeOwnershipInterestAcquired" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cumulative Ownership Interest Acquired</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_CumulativeOwnershipInterestAcquired" xlink:href="aqunf-20201231.xsd#aqunf_CumulativeOwnershipInterestAcquired"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_CumulativeOwnershipInterestAcquired" xlink:to="lab_aqunf_CumulativeOwnershipInterestAcquired" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ConsolidatedEntitiesDomain_10be445e-aabf-4e90-bf49-bf8b72fc5f92_terseLabel_en-US" xlink:label="lab_srt_ConsolidatedEntitiesDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Consolidated Entities [Domain]</link:label>
    <link:label id="lab_srt_ConsolidatedEntitiesDomain_label_en-US" xlink:label="lab_srt_ConsolidatedEntitiesDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Consolidated Entities [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidatedEntitiesDomain" xlink:to="lab_srt_ConsolidatedEntitiesDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_ProceedsfromNoncontrollingInterestsProductionBased_4852c90e-8a71-4efd-9be3-4057b0fa6019_terseLabel_en-US" xlink:label="lab_aqunf_ProceedsfromNoncontrollingInterestsProductionBased" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Production-based cash contributions from non-controlling interest</link:label>
    <link:label id="lab_aqunf_ProceedsfromNoncontrollingInterestsProductionBased_label_en-US" xlink:label="lab_aqunf_ProceedsfromNoncontrollingInterestsProductionBased" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from Noncontrolling Interests, Production Based</link:label>
    <link:label id="lab_aqunf_ProceedsfromNoncontrollingInterestsProductionBased_documentation_en-US" xlink:label="lab_aqunf_ProceedsfromNoncontrollingInterestsProductionBased" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from Noncontrolling Interests, Production Based</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_ProceedsfromNoncontrollingInterestsProductionBased" xlink:href="aqunf-20201231.xsd#aqunf_ProceedsfromNoncontrollingInterestsProductionBased"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_ProceedsfromNoncontrollingInterestsProductionBased" xlink:to="lab_aqunf_ProceedsfromNoncontrollingInterestsProductionBased" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_NIHUBExpiryDecember2031Member_25c72f6a-095c-4d43-ae18-e07f0ffb45e5_terseLabel_en-US" xlink:label="lab_aqunf_NIHUBExpiryDecember2031Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">NI HUB, Expiry December 2031</link:label>
    <link:label id="lab_aqunf_NIHUBExpiryDecember2031Member_label_en-US" xlink:label="lab_aqunf_NIHUBExpiryDecember2031Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">NI HUB, Expiry December 2031 [Member]</link:label>
    <link:label id="lab_aqunf_NIHUBExpiryDecember2031Member_documentation_en-US" xlink:label="lab_aqunf_NIHUBExpiryDecember2031Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">NI HUB, Expiry December 2031</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_NIHUBExpiryDecember2031Member" xlink:href="aqunf-20201231.xsd#aqunf_NIHUBExpiryDecember2031Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_NIHUBExpiryDecember2031Member" xlink:to="lab_aqunf_NIHUBExpiryDecember2031Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_ecd73cd7-5d9d-47e9-a408-d748cef86055_periodStartLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Beginning balance (in shares)</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_50d088fd-2420-4895-8a0f-c0ce90ff24bb_periodEndLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ending balance (in shares)</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent_a8c90f99-952f-4316-92e3-6dcb0ed7ee14_terseLabel_en-US" xlink:label="lab_us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Note payable to related party</link:label>
    <link:label id="lab_us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent_label_en-US" xlink:label="lab_us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notes Payable, Related Parties</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent" xlink:to="lab_us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_NoteReceivableNameDomain_45c355a2-a966-4e1b-b06c-1f8d0700de84_terseLabel_en-US" xlink:label="lab_aqunf_NoteReceivableNameDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Note Receivable, Name [Domain]</link:label>
    <link:label id="lab_aqunf_NoteReceivableNameDomain_label_en-US" xlink:label="lab_aqunf_NoteReceivableNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Note Receivable, Name [Domain]</link:label>
    <link:label id="lab_aqunf_NoteReceivableNameDomain_documentation_en-US" xlink:label="lab_aqunf_NoteReceivableNameDomain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Domain] for Note Receivable, Name [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_NoteReceivableNameDomain" xlink:href="aqunf-20201231.xsd#aqunf_NoteReceivableNameDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_NoteReceivableNameDomain" xlink:to="lab_aqunf_NoteReceivableNameDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DeferredTaxLiabilitiesRegulatoryAssets_dfef9148-8cc4-45eb-b038-8fa96457e34a_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilitiesRegulatoryAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulatory accounts</link:label>
    <link:label id="lab_us-gaap_DeferredTaxLiabilitiesRegulatoryAssets_label_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilitiesRegulatoryAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Tax Liabilities, Regulatory Assets</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesRegulatoryAssets" xlink:to="lab_us-gaap_DeferredTaxLiabilitiesRegulatoryAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_cd123e36-e8ab-4f08-b465-3ac62d0c81bf_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value of Share Options Granted</link:label>
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    <link:label id="lab_us-gaap_DepositsAssetsNoncurrent_464060dc-f1ba-42ba-b7f1-27df176864b3_terseLabel_en-US" xlink:label="lab_us-gaap_DepositsAssetsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term deposits</link:label>
    <link:label id="lab_us-gaap_DepositsAssetsNoncurrent_label_en-US" xlink:label="lab_us-gaap_DepositsAssetsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deposits Assets, Noncurrent</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepositsAssetsNoncurrent" xlink:to="lab_us-gaap_DepositsAssetsNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RegulatoryAssetsNoncurrent_96e37528-d3e7-4ba3-a853-d98fef9485eb_verboseLabel_en-US" xlink:label="lab_us-gaap_RegulatoryAssetsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulatory assets (note 7)</link:label>
    <link:label id="lab_us-gaap_RegulatoryAssetsNoncurrent_f8ec0ba0-39b3-4bb2-b8eb-676cb01fa41d_terseLabel_en-US" xlink:label="lab_us-gaap_RegulatoryAssetsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current regulatory assets</link:label>
    <link:label id="lab_us-gaap_RegulatoryAssetsNoncurrent_label_en-US" xlink:label="lab_us-gaap_RegulatoryAssetsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulatory Assets, Noncurrent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetsNoncurrent" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RegulatoryAssetsNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RegulatoryAssetsNoncurrent" xlink:to="lab_us-gaap_RegulatoryAssetsNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccountsReceivableMember_ce4d61cc-436a-4303-8587-06ada141b2ff_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsReceivableMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts Receivable</link:label>
    <link:label id="lab_us-gaap_AccountsReceivableMember_label_en-US" xlink:label="lab_us-gaap_AccountsReceivableMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts Receivable [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsReceivableMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsReceivableMember" xlink:to="lab_us-gaap_AccountsReceivableMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccountsNotesAndLoansReceivableLineItems_d5d9db9f-9a1b-404e-a89e-241483700f1f_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts, Notes, Loans and Financing Receivable [Line Items]</link:label>
    <link:label id="lab_us-gaap_AccountsNotesAndLoansReceivableLineItems_label_en-US" xlink:label="lab_us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts, Notes, Loans and Financing Receivable [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="lab_us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestRateSwapMember_05410bc5-92c8-42ff-8851-dabec334f9ef_terseLabel_en-US" xlink:label="lab_us-gaap_InterestRateSwapMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest rate swaps</link:label>
    <link:label id="lab_us-gaap_InterestRateSwapMember_label_en-US" xlink:label="lab_us-gaap_InterestRateSwapMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest Rate Swap [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestRateSwapMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestRateSwapMember" xlink:to="lab_us-gaap_InterestRateSwapMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest_8c89bbc7-93dc-49a7-8531-c5d98c1a2fe0_terseLabel_en-US" xlink:label="lab_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">AFUDC capitalized on regulated property</link:label>
    <link:label id="lab_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest_label_en-US" xlink:label="lab_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Allowance for Funds Used During Construction, Capitalized Interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest" xlink:to="lab_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_82057ee9-8e7c-44c5-890b-5b8ad1c34940_terseLabel_en-US" xlink:label="lab_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cumulative Effect, Period of Adoption, Adjustment</link:label>
    <link:label id="lab_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_label_en-US" xlink:label="lab_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cumulative Effect, Period of Adoption, Adjustment [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember" xlink:to="lab_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityRegistrantName_2a4cf0bd-0d4e-49a5-b9d0-e0cc69fedd6f_terseLabel_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:label id="lab_dei_EntityRegistrantName_label_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityRegistrantName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityRegistrantName" xlink:to="lab_dei_EntityRegistrantName" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsequentEventTypeDomain_cb9fc51c-2cdb-4d22-849b-78f2fdf32690_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsequent Event Type [Domain]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventTypeDomain_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsequent Event Type [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTypeDomain" xlink:to="lab_us-gaap_SubsequentEventTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_BusinessAcquisitionLineItems_9d00dde6-1f54-47d1-8776-8a48578d53c2_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Acquisition [Line Items]</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionLineItems_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Acquisition [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems" xlink:to="lab_us-gaap_BusinessAcquisitionLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_DisclosureChangesInNonCashOperatingItemsAbstract_37320eb2-c9ab-4645-8ca3-518e5451db42_terseLabel_en-US" xlink:label="lab_aqunf_DisclosureChangesInNonCashOperatingItemsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Changes In Non Cash Operating Items [Abstract]</link:label>
    <link:label id="lab_aqunf_DisclosureChangesInNonCashOperatingItemsAbstract_label_en-US" xlink:label="lab_aqunf_DisclosureChangesInNonCashOperatingItemsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Changes In Non Cash Operating Items [Abstract]</link:label>
    <link:label id="lab_aqunf_DisclosureChangesInNonCashOperatingItemsAbstract_documentation_en-US" xlink:label="lab_aqunf_DisclosureChangesInNonCashOperatingItemsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure - Changes in Non-Cash Operating Items [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_DisclosureChangesInNonCashOperatingItemsAbstract" xlink:href="aqunf-20201231.xsd#aqunf_DisclosureChangesInNonCashOperatingItemsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_DisclosureChangesInNonCashOperatingItemsAbstract" xlink:to="lab_aqunf_DisclosureChangesInNonCashOperatingItemsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DeferredFinanceCostsNet_4abbc2c2-b691-48dd-adc2-6771481da012_verboseLabel_en-US" xlink:label="lab_us-gaap_DeferredFinanceCostsNet" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred financing costs</link:label>
    <link:label id="lab_us-gaap_DeferredFinanceCostsNet_label_en-US" xlink:label="lab_us-gaap_DeferredFinanceCostsNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Issuance Costs, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredFinanceCostsNet" xlink:to="lab_us-gaap_DeferredFinanceCostsNet" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_d9e2768c-cee5-429f-9761-7f974d06e958_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average exercise price</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_bda2effb-3cc9-4b02-a08f-7193b4be36e0_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average grant-date fair value</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RegulatoryLiabilityCurrent_c957bec4-8895-4cc8-a995-ca5ac9f22c6d_terseLabel_en-US" xlink:label="lab_us-gaap_RegulatoryLiabilityCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulatory liabilities (note 7)</link:label>
    <link:label id="lab_us-gaap_RegulatoryLiabilityCurrent_cb0a4fa1-8da9-4183-bafe-c92d7089d5c2_negatedLabel_en-US" xlink:label="lab_us-gaap_RegulatoryLiabilityCurrent" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Less: current regulatory liabilities</link:label>
    <link:label id="lab_us-gaap_RegulatoryLiabilityCurrent_label_en-US" xlink:label="lab_us-gaap_RegulatoryLiabilityCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulatory Liability, Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityCurrent" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RegulatoryLiabilityCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RegulatoryLiabilityCurrent" xlink:to="lab_us-gaap_RegulatoryLiabilityCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RegulatoryAssets_7a63f1c8-67d0-4be7-b035-dd17772a8d17_totalLabel_en-US" xlink:label="lab_us-gaap_RegulatoryAssets" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total regulatory assets</link:label>
    <link:label id="lab_us-gaap_RegulatoryAssets_7527bd7d-f737-4620-84f0-8ac4bfefa9ca_verboseLabel_en-US" xlink:label="lab_us-gaap_RegulatoryAssets" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulatory assets</link:label>
    <link:label id="lab_us-gaap_RegulatoryAssets_ec805a5b-3a0c-490f-9522-5564fa5d341a_terseLabel_en-US" xlink:label="lab_us-gaap_RegulatoryAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulatory Assets</link:label>
    <link:label id="lab_us-gaap_RegulatoryAssets_label_en-US" xlink:label="lab_us-gaap_RegulatoryAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulatory Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssets" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RegulatoryAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RegulatoryAssets" xlink:to="lab_us-gaap_RegulatoryAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromSaleMaturityAndCollectionOfLongtermInvestments_2f6e7372-6dd9-403a-8079-14f6a05030f2_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleMaturityAndCollectionOfLongtermInvestments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Distributions received from equity investments</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleMaturityAndCollectionOfLongtermInvestments_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleMaturityAndCollectionOfLongtermInvestments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from Sale, Maturity and Collection of Long-term Investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleMaturityAndCollectionOfLongtermInvestments" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromSaleMaturityAndCollectionOfLongtermInvestments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleMaturityAndCollectionOfLongtermInvestments" xlink:to="lab_us-gaap_ProceedsFromSaleMaturityAndCollectionOfLongtermInvestments" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_NotePayableToRelatedPartyMember_6abcbf80-0672-4576-9fe9-73210f357926_terseLabel_en-US" xlink:label="lab_aqunf_NotePayableToRelatedPartyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Note payable to related party</link:label>
    <link:label id="lab_aqunf_NotePayableToRelatedPartyMember_label_en-US" xlink:label="lab_aqunf_NotePayableToRelatedPartyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Note Payable to Related Party [Member]</link:label>
    <link:label id="lab_aqunf_NotePayableToRelatedPartyMember_documentation_en-US" xlink:label="lab_aqunf_NotePayableToRelatedPartyMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Note Payable to Related Party</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_NotePayableToRelatedPartyMember" xlink:href="aqunf-20201231.xsd#aqunf_NotePayableToRelatedPartyMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_NotePayableToRelatedPartyMember" xlink:to="lab_aqunf_NotePayableToRelatedPartyMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsOfDividendsCommonStock_350c343e-a607-4940-835e-f8eb0c67b8d0_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsCommonStock" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash dividends on common shares</link:label>
    <link:label id="lab_us-gaap_PaymentsOfDividendsCommonStock_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsCommonStock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments of Ordinary Dividends, Common Stock</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsOfDividendsCommonStock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDividendsCommonStock" xlink:to="lab_us-gaap_PaymentsOfDividendsCommonStock" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_LibertyPowerGroupMember_ce8dd2bb-6dcd-410d-a4f8-a71264651057_terseLabel_en-US" xlink:label="lab_aqunf_LibertyPowerGroupMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Renewable Energy Group</link:label>
    <link:label id="lab_aqunf_LibertyPowerGroupMember_label_en-US" xlink:label="lab_aqunf_LibertyPowerGroupMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liberty Power Group [Member]</link:label>
    <link:label id="lab_aqunf_LibertyPowerGroupMember_documentation_en-US" xlink:label="lab_aqunf_LibertyPowerGroupMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liberty Power Group [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_LibertyPowerGroupMember" xlink:href="aqunf-20201231.xsd#aqunf_LibertyPowerGroupMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_LibertyPowerGroupMember" xlink:to="lab_aqunf_LibertyPowerGroupMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EquitySecuritiesMember_6522244c-615f-41b2-b1bd-0284967791f0_terseLabel_en-US" xlink:label="lab_us-gaap_EquitySecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity securities</link:label>
    <link:label id="lab_us-gaap_EquitySecuritiesMember_label_en-US" xlink:label="lab_us-gaap_EquitySecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity Securities [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquitySecuritiesMember" xlink:to="lab_us-gaap_EquitySecuritiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityIncorporationStateCountryCode_8c2ee5aa-7c9b-4d65-abd6-518cf508b18c_terseLabel_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
    <link:label id="lab_dei_EntityIncorporationStateCountryCode_label_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityIncorporationStateCountryCode" xlink:to="lab_dei_EntityIncorporationStateCountryCode" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_OtherLiabilityRepaymentPeriod_088039d9-c04e-4e96-aa18-80b92f98d33e_terseLabel_en-US" xlink:label="lab_aqunf_OtherLiabilityRepaymentPeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other liability repayment period</link:label>
    <link:label id="lab_aqunf_OtherLiabilityRepaymentPeriod_label_en-US" xlink:label="lab_aqunf_OtherLiabilityRepaymentPeriod" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Liability, Repayment Period</link:label>
    <link:label id="lab_aqunf_OtherLiabilityRepaymentPeriod_documentation_en-US" xlink:label="lab_aqunf_OtherLiabilityRepaymentPeriod" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Liability, Repayment Period</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_OtherLiabilityRepaymentPeriod" xlink:href="aqunf-20201231.xsd#aqunf_OtherLiabilityRepaymentPeriod"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_OtherLiabilityRepaymentPeriod" xlink:to="lab_aqunf_OtherLiabilityRepaymentPeriod" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_PeriodThreeMember_85ad3b18-4e0d-49ac-88ca-7296e749ea92_terseLabel_en-US" xlink:label="lab_aqunf_PeriodThreeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Due 4 to 5 years</link:label>
    <link:label id="lab_aqunf_PeriodThreeMember_label_en-US" xlink:label="lab_aqunf_PeriodThreeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Period Three [Member]</link:label>
    <link:label id="lab_aqunf_PeriodThreeMember_documentation_en-US" xlink:label="lab_aqunf_PeriodThreeMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Period 3 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_PeriodThreeMember" xlink:href="aqunf-20201231.xsd#aqunf_PeriodThreeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_PeriodThreeMember" xlink:to="lab_aqunf_PeriodThreeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_PartnershipAgreementFundedAmount_c49a6403-e221-4457-ad13-b59dddae3cef_terseLabel_en-US" xlink:label="lab_aqunf_PartnershipAgreementFundedAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Partnership agreement, funded amount</link:label>
    <link:label id="lab_aqunf_PartnershipAgreementFundedAmount_label_en-US" xlink:label="lab_aqunf_PartnershipAgreementFundedAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Partnership Agreement, Funded Amount</link:label>
    <link:label id="lab_aqunf_PartnershipAgreementFundedAmount_documentation_en-US" xlink:label="lab_aqunf_PartnershipAgreementFundedAmount" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Partnership Agreement, Funded Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_PartnershipAgreementFundedAmount" xlink:href="aqunf-20201231.xsd#aqunf_PartnershipAgreementFundedAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_PartnershipAgreementFundedAmount" xlink:to="lab_aqunf_PartnershipAgreementFundedAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PreferredStockDividendsIncomeStatementImpact_2e0b9c46-38aa-46c2-9b1d-fc6349959124_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockDividendsIncomeStatementImpact" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series A and D Preferred shares dividend (note 15)</link:label>
    <link:label id="lab_us-gaap_PreferredStockDividendsIncomeStatementImpact_438ae82e-cffe-4152-aa8d-eb2d06d60fac_verboseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockDividendsIncomeStatementImpact" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series A and D Preferred shares dividend</link:label>
    <link:label id="lab_us-gaap_PreferredStockDividendsIncomeStatementImpact_label_en-US" xlink:label="lab_us-gaap_PreferredStockDividendsIncomeStatementImpact" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred Stock Dividends, Income Statement Impact</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockDividendsIncomeStatementImpact" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PreferredStockDividendsIncomeStatementImpact"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockDividendsIncomeStatementImpact" xlink:to="lab_us-gaap_PreferredStockDividendsIncomeStatementImpact" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SharesIssuedPricePerShare_99dd066d-38bd-475c-9916-85aba211ec1e_terseLabel_en-US" xlink:label="lab_us-gaap_SharesIssuedPricePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shares issued, price per share (USD and CAD per share)</link:label>
    <link:label id="lab_us-gaap_SharesIssuedPricePerShare_label_en-US" xlink:label="lab_us-gaap_SharesIssuedPricePerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shares Issued, Price Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesIssuedPricePerShare" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharesIssuedPricePerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharesIssuedPricePerShare" xlink:to="lab_us-gaap_SharesIssuedPricePerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_InvestmentTaxCreditsUnamortized_9adafe51-2706-4604-860f-93a20beb48b4_terseLabel_en-US" xlink:label="lab_aqunf_InvestmentTaxCreditsUnamortized" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unamortized investment tax credits</link:label>
    <link:label id="lab_aqunf_InvestmentTaxCreditsUnamortized_label_en-US" xlink:label="lab_aqunf_InvestmentTaxCreditsUnamortized" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment Tax Credits, Unamortized</link:label>
    <link:label id="lab_aqunf_InvestmentTaxCreditsUnamortized_documentation_en-US" xlink:label="lab_aqunf_InvestmentTaxCreditsUnamortized" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment Tax Credits, Unamortized</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_InvestmentTaxCreditsUnamortized" xlink:href="aqunf-20201231.xsd#aqunf_InvestmentTaxCreditsUnamortized"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_InvestmentTaxCreditsUnamortized" xlink:to="lab_aqunf_InvestmentTaxCreditsUnamortized" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_ScheduleOfEmployeeServiceShareBasedCompensationExpenseAllocationTable_b87e3208-f923-41d2-a355-ec3e049aeb5d_terseLabel_en-US" xlink:label="lab_aqunf_ScheduleOfEmployeeServiceShareBasedCompensationExpenseAllocationTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule Of Employee Service Share Based Compensation Expense Allocation [Table]</link:label>
    <link:label id="lab_aqunf_ScheduleOfEmployeeServiceShareBasedCompensationExpenseAllocationTable_label_en-US" xlink:label="lab_aqunf_ScheduleOfEmployeeServiceShareBasedCompensationExpenseAllocationTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule Of Employee Service Share Based Compensation Expense Allocation [Table]</link:label>
    <link:label id="lab_aqunf_ScheduleOfEmployeeServiceShareBasedCompensationExpenseAllocationTable_documentation_en-US" xlink:label="lab_aqunf_ScheduleOfEmployeeServiceShareBasedCompensationExpenseAllocationTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule Of Employee Service Share Based Compensation Expense Allocation [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_ScheduleOfEmployeeServiceShareBasedCompensationExpenseAllocationTable" xlink:href="aqunf-20201231.xsd#aqunf_ScheduleOfEmployeeServiceShareBasedCompensationExpenseAllocationTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_ScheduleOfEmployeeServiceShareBasedCompensationExpenseAllocationTable" xlink:to="lab_aqunf_ScheduleOfEmployeeServiceShareBasedCompensationExpenseAllocationTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_db08fe74-c100-4ffd-bd72-8f7da73ad8b1_terseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments for New Accounting Pronouncements [Axis]</link:label>
    <link:label id="lab_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_label_en-US" xlink:label="lab_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounting Standards Update [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:to="lab_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_GainLossOnDispositionOfAssets_256dc9b5-5547-4cb5-972e-7d650b1705ee_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnDispositionOfAssets" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_GainLossOnDispositionOfAssets_label_en-US" xlink:label="lab_us-gaap_GainLossOnDispositionOfAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnDispositionOfAssets" xlink:to="lab_us-gaap_GainLossOnDispositionOfAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_BonusDeferralRestrictedStockUnitsMember_32102527-556f-47a1-b226-406079290ce0_terseLabel_en-US" xlink:label="lab_aqunf_BonusDeferralRestrictedStockUnitsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Bonus Deferral Restricted Stock Units</link:label>
    <link:label id="lab_aqunf_BonusDeferralRestrictedStockUnitsMember_label_en-US" xlink:label="lab_aqunf_BonusDeferralRestrictedStockUnitsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Bonus Deferral Restricted Stock Units [Member]</link:label>
    <link:label id="lab_aqunf_BonusDeferralRestrictedStockUnitsMember_documentation_en-US" xlink:label="lab_aqunf_BonusDeferralRestrictedStockUnitsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Bonus Deferral Restricted Stock Units [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_BonusDeferralRestrictedStockUnitsMember" xlink:href="aqunf-20201231.xsd#aqunf_BonusDeferralRestrictedStockUnitsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_BonusDeferralRestrictedStockUnitsMember" xlink:to="lab_aqunf_BonusDeferralRestrictedStockUnitsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccountingStandardsUpdate201712Member_968f0fda-f300-4d4b-8612-668cd9e9af45_terseLabel_en-US" xlink:label="lab_us-gaap_AccountingStandardsUpdate201712Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adoption of ASU 2017-12 on hedging</link:label>
    <link:label id="lab_us-gaap_AccountingStandardsUpdate201712Member_label_en-US" xlink:label="lab_us-gaap_AccountingStandardsUpdate201712Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounting Standards Update 2017-12 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountingStandardsUpdate201712Member" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountingStandardsUpdate201712Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountingStandardsUpdate201712Member" xlink:to="lab_us-gaap_AccountingStandardsUpdate201712Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross_2c016430-2b1e-4d2b-ae18-633d2efdb672_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shares issued during period (in shares)</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shares Issued, Shares, Share-based Payment Arrangement, before Forfeiture</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsidiarySaleOfStockAxis_8417714c-cd44-4757-b5b8-24ab1c5f82df_terseLabel_en-US" xlink:label="lab_us-gaap_SubsidiarySaleOfStockAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale of Stock [Axis]</link:label>
    <link:label id="lab_us-gaap_SubsidiarySaleOfStockAxis_label_en-US" xlink:label="lab_us-gaap_SubsidiarySaleOfStockAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale of Stock [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis" xlink:to="lab_us-gaap_SubsidiarySaleOfStockAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressPostalZipCode_454c4065-4be1-44e0-bb9b-2fd6507e1d98_terseLabel_en-US" xlink:label="lab_dei_EntityAddressPostalZipCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
    <link:label id="lab_dei_EntityAddressPostalZipCode_label_en-US" xlink:label="lab_dei_EntityAddressPostalZipCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityAddressPostalZipCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressPostalZipCode" xlink:to="lab_dei_EntityAddressPostalZipCode" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_SouthwesternMissouriWindProjectsMember_ae65d150-41e0-444f-8b84-c5e3c8dee2db_terseLabel_en-US" xlink:label="lab_aqunf_SouthwesternMissouriWindProjectsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Southwestern Missouri Wind Projects</link:label>
    <link:label id="lab_aqunf_SouthwesternMissouriWindProjectsMember_label_en-US" xlink:label="lab_aqunf_SouthwesternMissouriWindProjectsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Southwestern Missouri Wind Projects [Member]</link:label>
    <link:label id="lab_aqunf_SouthwesternMissouriWindProjectsMember_documentation_en-US" xlink:label="lab_aqunf_SouthwesternMissouriWindProjectsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Southwestern Missouri Wind Projects</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_SouthwesternMissouriWindProjectsMember" xlink:href="aqunf-20201231.xsd#aqunf_SouthwesternMissouriWindProjectsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_SouthwesternMissouriWindProjectsMember" xlink:to="lab_aqunf_SouthwesternMissouriWindProjectsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DeferredTaxAssetsNet_883983ec-ad64-4abb-8f94-4ac487964b42_totalLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsNet" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total deferred tax assets</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsNet_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Tax Assets, Net of Valuation Allowance</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsNet" xlink:to="lab_us-gaap_DeferredTaxAssetsNet" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_LongTermInvestmentsAndNotesReceivableDisclosureTextBlock_3f7b0404-292b-47a2-beb4-1f96fe090313_terseLabel_en-US" xlink:label="lab_aqunf_LongTermInvestmentsAndNotesReceivableDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term investments</link:label>
    <link:label id="lab_aqunf_LongTermInvestmentsAndNotesReceivableDisclosureTextBlock_label_en-US" xlink:label="lab_aqunf_LongTermInvestmentsAndNotesReceivableDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long Term Investments And Notes Receivable Disclosure [Text Block]</link:label>
    <link:label id="lab_aqunf_LongTermInvestmentsAndNotesReceivableDisclosureTextBlock_documentation_en-US" xlink:label="lab_aqunf_LongTermInvestmentsAndNotesReceivableDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long Term Investments and Notes Receivable Disclosure.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_LongTermInvestmentsAndNotesReceivableDisclosureTextBlock" xlink:href="aqunf-20201231.xsd#aqunf_LongTermInvestmentsAndNotesReceivableDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_LongTermInvestmentsAndNotesReceivableDisclosureTextBlock" xlink:to="lab_aqunf_LongTermInvestmentsAndNotesReceivableDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_Goodwill_17f4f1f0-887b-4935-bf33-74a6aa00b952_terseLabel_en-US" xlink:label="lab_us-gaap_Goodwill" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill (note 6)</link:label>
    <link:label id="lab_us-gaap_Goodwill_2a76f05d-1d66-4a39-bd98-f0e19997fd58_verboseLabel_en-US" xlink:label="lab_us-gaap_Goodwill" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill</link:label>
    <link:label id="lab_us-gaap_Goodwill_73414577-5ba0-45ba-84a3-b799e9efdf4c_periodStartLabel_en-US" xlink:label="lab_us-gaap_Goodwill" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill beginning of the period</link:label>
    <link:label id="lab_us-gaap_Goodwill_7be7576b-355b-425b-bf90-6c83e34233be_periodEndLabel_en-US" xlink:label="lab_us-gaap_Goodwill" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill end of the period</link:label>
    <link:label id="lab_us-gaap_Goodwill_label_en-US" xlink:label="lab_us-gaap_Goodwill" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Goodwill"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Goodwill" xlink:to="lab_us-gaap_Goodwill" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsForfeituresandExpirationsWeightedAverageGrantDateFairValue_981b6714-fc01-4e09-ab54-6134b883e95a_terseLabel_en-US" xlink:label="lab_aqunf_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsForfeituresandExpirationsWeightedAverageGrantDateFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Forfeited (CAD per share)</link:label>
    <link:label id="lab_aqunf_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsForfeituresandExpirationsWeightedAverageGrantDateFairValue_label_en-US" xlink:label="lab_aqunf_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsForfeituresandExpirationsWeightedAverageGrantDateFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures and Expirations, Weighted Average Grant Date Fair Value</link:label>
    <link:label id="lab_aqunf_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsForfeituresandExpirationsWeightedAverageGrantDateFairValue_documentation_en-US" xlink:label="lab_aqunf_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsForfeituresandExpirationsWeightedAverageGrantDateFairValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures and Expirations, Weighted Average Grant Date Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsForfeituresandExpirationsWeightedAverageGrantDateFairValue" xlink:href="aqunf-20201231.xsd#aqunf_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsForfeituresandExpirationsWeightedAverageGrantDateFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsForfeituresandExpirationsWeightedAverageGrantDateFairValue" xlink:to="lab_aqunf_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsForfeituresandExpirationsWeightedAverageGrantDateFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_ed942823-1e7d-4d5d-8db1-5ae543a68a0c_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net current period OCI attributable to shareholders of AQN</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsToAcquireLongtermInvestments_66dfed2a-53f3-49e5-80eb-28c42bfa2186_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireLongtermInvestments" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase in long-term investments</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireLongtermInvestments_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireLongtermInvestments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments to Acquire Long-term Investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireLongtermInvestments" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsToAcquireLongtermInvestments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireLongtermInvestments" xlink:to="lab_us-gaap_PaymentsToAcquireLongtermInvestments" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockDividendsPerShareDeclared_d3a80839-430d-4dc8-ac4e-4fa1cb9d4a52_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareDeclared" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash dividend declared per common share (USD per share)</link:label>
    <link:label id="lab_us-gaap_CommonStockDividendsPerShareDeclared_label_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareDeclared" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common Stock, Dividends, Per Share, Declared</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockDividendsPerShareDeclared" xlink:to="lab_us-gaap_CommonStockDividendsPerShareDeclared" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_3bcc112f-90a1-4412-9f89-76590849d5b0_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Par value</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Instrument, Face Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentFaceAmount" xlink:to="lab_us-gaap_DebtInstrumentFaceAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_RevenueNotfromContractwithCustomerHedgingGains_c318edc2-fe9b-4abe-9471-9c87f4c4be78_terseLabel_en-US" xlink:label="lab_aqunf_RevenueNotfromContractwithCustomerHedgingGains" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue related to net hedging gains, not recognized as revenue from contract with customers</link:label>
    <link:label id="lab_aqunf_RevenueNotfromContractwithCustomerHedgingGains_label_en-US" xlink:label="lab_aqunf_RevenueNotfromContractwithCustomerHedgingGains" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue Not from Contract with Customer, Hedging Gains</link:label>
    <link:label id="lab_aqunf_RevenueNotfromContractwithCustomerHedgingGains_documentation_en-US" xlink:label="lab_aqunf_RevenueNotfromContractwithCustomerHedgingGains" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue Not from Contract with Customer, Hedging Gains</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_RevenueNotfromContractwithCustomerHedgingGains" xlink:href="aqunf-20201231.xsd#aqunf_RevenueNotfromContractwithCustomerHedgingGains"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_RevenueNotfromContractwithCustomerHedgingGains" xlink:to="lab_aqunf_RevenueNotfromContractwithCustomerHedgingGains" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherAssetsCurrent_07b8c864-b21e-4b1f-b0ec-43954b54220e_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other assets (note 11)</link:label>
    <link:label id="lab_us-gaap_OtherAssetsCurrent_label_en-US" xlink:label="lab_us-gaap_OtherAssetsCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Assets, Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssetsCurrent" xlink:to="lab_us-gaap_OtherAssetsCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfGoodwillTextBlock_5f2636e9-5933-452e-a2a0-8610464e47c3_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfGoodwillTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill</link:label>
    <link:label id="lab_us-gaap_ScheduleOfGoodwillTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfGoodwillTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Goodwill [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTextBlock" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfGoodwillTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfGoodwillTextBlock" xlink:to="lab_us-gaap_ScheduleOfGoodwillTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_SolarPowerCapacity_db5130f4-633e-48be-aebd-a58cc6f6932f_terseLabel_en-US" xlink:label="lab_aqunf_SolarPowerCapacity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Solar power capacity (megawatt ac)</link:label>
    <link:label id="lab_aqunf_SolarPowerCapacity_label_en-US" xlink:label="lab_aqunf_SolarPowerCapacity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Solar Power Capacity</link:label>
    <link:label id="lab_aqunf_SolarPowerCapacity_documentation_en-US" xlink:label="lab_aqunf_SolarPowerCapacity" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Solar Power Capacity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_SolarPowerCapacity" xlink:href="aqunf-20201231.xsd#aqunf_SolarPowerCapacity"/>
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    <link:label id="lab_aqunf_SeniorUnsecuredDebtMember_5807d12a-7565-4f4b-a5a1-d14bb225e6d7_terseLabel_en-US" xlink:label="lab_aqunf_SeniorUnsecuredDebtMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Senior Unsecured Debt</link:label>
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    <link:label id="lab_us-gaap_UnsecuredDebtMember_59ddad96-fc28-4243-8f6b-7adb25c8d889_terseLabel_en-US" xlink:label="lab_us-gaap_UnsecuredDebtMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Senior Unsecured Notes</link:label>
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    <link:label id="lab_us-gaap_CommonStockValue_a84feb9b-3d3c-4105-b54f-98b4ed9bd543_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common shares</link:label>
    <link:label id="lab_us-gaap_CommonStockValue_label_en-US" xlink:label="lab_us-gaap_CommonStockValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common Stock, Value, Issued</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockValue" xlink:to="lab_us-gaap_CommonStockValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_e790fc22-2ccd-4f7c-b62e-bd31bc8af260_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2024</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payment, Year Four</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsLineItems_541bd8ee-de09-425a-a7cc-49ce34376371_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finite-Lived Intangible Assets [Line Items]</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsLineItems_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finite-Lived Intangible Assets [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentFiscalYearFocus_a80110e0-021c-41ea-9da5-fb329f76644f_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Fiscal Year Focus</link:label>
    <link:label id="lab_dei_DocumentFiscalYearFocus_label_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Fiscal Year Focus</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_DocumentFiscalYearFocus"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentFiscalYearFocus" xlink:to="lab_dei_DocumentFiscalYearFocus" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherLongTermInvestments_58cdfd7c-6248-4811-8561-3c6bc767eb14_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLongTermInvestments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other long-term investments</link:label>
    <link:label id="lab_us-gaap_OtherLongTermInvestments_label_en-US" xlink:label="lab_us-gaap_OtherLongTermInvestments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Long-term Investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLongTermInvestments" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherLongTermInvestments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLongTermInvestments" xlink:to="lab_us-gaap_OtherLongTermInvestments" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_WeightedAverageNumberOfSharesAbstract_839b5de3-f474-4290-83f3-09e3079fece1_terseLabel_en-US" xlink:label="lab_aqunf_WeightedAverageNumberOfSharesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average number of shares</link:label>
    <link:label id="lab_aqunf_WeightedAverageNumberOfSharesAbstract_label_en-US" xlink:label="lab_aqunf_WeightedAverageNumberOfSharesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Number Of Shares [Abstract]</link:label>
    <link:label id="lab_aqunf_WeightedAverageNumberOfSharesAbstract_documentation_en-US" xlink:label="lab_aqunf_WeightedAverageNumberOfSharesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Number Of Shares [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_WeightedAverageNumberOfSharesAbstract" xlink:href="aqunf-20201231.xsd#aqunf_WeightedAverageNumberOfSharesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_WeightedAverageNumberOfSharesAbstract" xlink:to="lab_aqunf_WeightedAverageNumberOfSharesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_c6228e14-31a3-4791-aaf4-bf029b140903_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Estimated amortization expense for intangibles in year 2</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finite-Lived Intangible Asset, Expected Amortization, Year Two</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_InterconnectionAgreementsMember_22036e5f-6ce8-4fb7-b18e-8b96c47f1a13_terseLabel_en-US" xlink:label="lab_aqunf_InterconnectionAgreementsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interconnection agreements</link:label>
    <link:label id="lab_aqunf_InterconnectionAgreementsMember_label_en-US" xlink:label="lab_aqunf_InterconnectionAgreementsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interconnection Agreements [Member]</link:label>
    <link:label id="lab_aqunf_InterconnectionAgreementsMember_documentation_en-US" xlink:label="lab_aqunf_InterconnectionAgreementsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interconnection Agreements [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_InterconnectionAgreementsMember" xlink:href="aqunf-20201231.xsd#aqunf_InterconnectionAgreementsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_InterconnectionAgreementsMember" xlink:to="lab_aqunf_InterconnectionAgreementsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_AtlanticaYieldEnergySolutionsCanadaInc.Member_fa1bd589-ecec-4d5f-b86d-14e59d90db84_terseLabel_en-US" xlink:label="lab_aqunf_AtlanticaYieldEnergySolutionsCanadaInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Atlantica Yield Energy Solutions Canada, Inc</link:label>
    <link:label id="lab_aqunf_AtlanticaYieldEnergySolutionsCanadaInc.Member_label_en-US" xlink:label="lab_aqunf_AtlanticaYieldEnergySolutionsCanadaInc.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Atlantica Yield Energy Solutions Canada, Inc. [Member]</link:label>
    <link:label id="lab_aqunf_AtlanticaYieldEnergySolutionsCanadaInc.Member_documentation_en-US" xlink:label="lab_aqunf_AtlanticaYieldEnergySolutionsCanadaInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Atlantica Yield Energy Solutions Canada, Inc. [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_AtlanticaYieldEnergySolutionsCanadaInc.Member" xlink:href="aqunf-20201231.xsd#aqunf_AtlanticaYieldEnergySolutionsCanadaInc.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_AtlanticaYieldEnergySolutionsCanadaInc.Member" xlink:to="lab_aqunf_AtlanticaYieldEnergySolutionsCanadaInc.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongTermDebtCurrent_e7c2ffd2-f059-42ec-a56b-65328009d100_verboseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtCurrent" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term debt (note 9)</link:label>
    <link:label id="lab_us-gaap_LongTermDebtCurrent_78aeb638-a993-4428-8d9f-3e9ef1d6fd21_negatedLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtCurrent" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Less: current portion</link:label>
    <link:label id="lab_us-gaap_LongTermDebtCurrent_label_en-US" xlink:label="lab_us-gaap_LongTermDebtCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt, Current Maturities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtCurrent" xlink:to="lab_us-gaap_LongTermDebtCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DefinedBenefitPlanBenefitObligation_f540afea-9dd9-4455-a4ff-edd45d35f93d_periodStartLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanBenefitObligation" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Projected benefit obligation, beginning of year</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanBenefitObligation_565b6bcb-4c70-4bc0-85a6-ea43f85b0cd1_periodEndLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanBenefitObligation" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Projected benefit obligation, end of year</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanBenefitObligation_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanBenefitObligation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Benefit Obligation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanBenefitObligation" xlink:to="lab_us-gaap_DefinedBenefitPlanBenefitObligation" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityCurrentReportingStatus_574e4b55-3ad7-49e9-be99-64da488609b4_terseLabel_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Current Reporting Status</link:label>
    <link:label id="lab_dei_EntityCurrentReportingStatus_label_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Current Reporting Status</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityCurrentReportingStatus"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCurrentReportingStatus" xlink:to="lab_dei_EntityCurrentReportingStatus" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_BondsMember_b396d5ab-eee8-49f2-ada0-312ca098d859_terseLabel_en-US" xlink:label="lab_us-gaap_BondsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Bonds</link:label>
    <link:label id="lab_us-gaap_BondsMember_label_en-US" xlink:label="lab_us-gaap_BondsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Bonds [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BondsMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BondsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BondsMember" xlink:to="lab_us-gaap_BondsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_LongtermDebtIncludingAdjustment_7e48aeb3-c7a1-4153-b74a-415814215ffb_totalLabel_en-US" xlink:label="lab_aqunf_LongtermDebtIncludingAdjustment" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total, including adjustment</link:label>
    <link:label id="lab_aqunf_LongtermDebtIncludingAdjustment_label_en-US" xlink:label="lab_aqunf_LongtermDebtIncludingAdjustment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt, Including Adjustment</link:label>
    <link:label id="lab_aqunf_LongtermDebtIncludingAdjustment_documentation_en-US" xlink:label="lab_aqunf_LongtermDebtIncludingAdjustment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt, Including Adjustment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_LongtermDebtIncludingAdjustment" xlink:href="aqunf-20201231.xsd#aqunf_LongtermDebtIncludingAdjustment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_LongtermDebtIncludingAdjustment" xlink:to="lab_aqunf_LongtermDebtIncludingAdjustment" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RemovalCostsMember_bacdd09e-1e64-481a-9000-ecc9e78ea4c5_terseLabel_en-US" xlink:label="lab_us-gaap_RemovalCostsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cost of removal</link:label>
    <link:label id="lab_us-gaap_RemovalCostsMember_label_en-US" xlink:label="lab_us-gaap_RemovalCostsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Removal Costs [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RemovalCostsMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RemovalCostsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RemovalCostsMember" xlink:to="lab_us-gaap_RemovalCostsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CurrencySwapMember_412413a6-b80f-427d-a8cf-e8a947ed1c53_terseLabel_en-US" xlink:label="lab_us-gaap_CurrencySwapMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Currency Swap</link:label>
    <link:label id="lab_us-gaap_CurrencySwapMember_label_en-US" xlink:label="lab_us-gaap_CurrencySwapMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Currency Swap [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrencySwapMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CurrencySwapMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CurrencySwapMember" xlink:to="lab_us-gaap_CurrencySwapMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherAssetsMiscellaneous_760d3323-77e5-4a02-bf21-421c36997715_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsMiscellaneous" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_OtherAssetsMiscellaneous_label_en-US" xlink:label="lab_us-gaap_OtherAssetsMiscellaneous" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Assets, Miscellaneous</link:label>
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    <link:label id="lab_dei_EntityAddressCityOrTown_548847ca-cfc7-4cea-a30f-4172f5f63f55_terseLabel_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, City or Town</link:label>
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    <link:label id="lab_us-gaap_TypeOfAdoptionMember_3340d1bc-9c21-40a7-8acb-5004e716a54c_terseLabel_en-US" xlink:label="lab_us-gaap_TypeOfAdoptionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Type of Adoption [Domain]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLiabilitiesCurrent" xlink:to="lab_us-gaap_OtherLiabilitiesCurrent" xlink:type="arc" order="1"/>
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    <link:label id="lab_aqunf_BlueHillMember_documentation_en-US" xlink:label="lab_aqunf_BlueHillMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Blue Hill</link:label>
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    <link:label id="lab_aqunf_RegulatedWaterMember_e490f89f-be7a-4a46-8acf-98db29ecd2d0_terseLabel_en-US" xlink:label="lab_aqunf_RegulatedWaterMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulated water reclamation and distribution</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPricePercentage_5efff720-f2bd-46b5-a0ea-69fb9c000bf4_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPricePercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redemption price (percent)</link:label>
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    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract_1f5aac20-3c5b-4293-9c7b-5b085a4d5d74_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income tax expense (note 18)</link:label>
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    <link:label id="lab_us-gaap_SecuredDebtMember_3fd01b09-e468-4c5c-bd88-39d68625812c_terseLabel_en-US" xlink:label="lab_us-gaap_SecuredDebtMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Senior Secured Utility Bonds</link:label>
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    <link:label id="lab_us-gaap_SecuredDebtMember_label_en-US" xlink:label="lab_us-gaap_SecuredDebtMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Secured Debt [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SecuredDebtMember"/>
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    <link:label id="lab_aqunf_NumberOfTurbinesCommissioned_419ff81a-a648-4340-ab34-1611571520d1_terseLabel_en-US" xlink:label="lab_aqunf_NumberOfTurbinesCommissioned" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of turbines commissioned</link:label>
    <link:label id="lab_aqunf_NumberOfTurbinesCommissioned_label_en-US" xlink:label="lab_aqunf_NumberOfTurbinesCommissioned" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of Turbines Commissioned</link:label>
    <link:label id="lab_aqunf_NumberOfTurbinesCommissioned_documentation_en-US" xlink:label="lab_aqunf_NumberOfTurbinesCommissioned" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of Turbines Commissioned</link:label>
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    <link:label id="lab_us-gaap_PartnershipMember_b874c21b-e61f-47a6-8e54-6dd1b4f5f3a6_terseLabel_en-US" xlink:label="lab_us-gaap_PartnershipMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Partnership</link:label>
    <link:label id="lab_us-gaap_PartnershipMember_label_en-US" xlink:label="lab_us-gaap_PartnershipMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Partnership [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnershipMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PartnershipMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnershipMember" xlink:to="lab_us-gaap_PartnershipMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInRegulatoryAssetsAndLiabilities_a6f1e7b9-7632-4ec9-ac75-6ce61b176a08_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInRegulatoryAssetsAndLiabilities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net regulatory assets and liabilities</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInRegulatoryAssetsAndLiabilities" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInRegulatoryAssetsAndLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInRegulatoryAssetsAndLiabilities" xlink:to="lab_us-gaap_IncreaseDecreaseInRegulatoryAssetsAndLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation_8e307309-67e6-40d6-8d54-650dde52a95d_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Projected benefit obligation</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation"/>
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    <link:label id="lab_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_49894fb2-4f67-4b47-a29f-d76249640d18_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Equity Method Investments [Line Items]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_label_en-US" xlink:label="lab_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Equity Method Investments [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
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    <link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_bef4bcd2-86d3-4e70-8e3e-74185bbc4d84_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest rate (percent)</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_a59d5b5f-2218-4de8-ae7c-d1f283ee96cb_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest rate (percent)</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Instrument, Interest Rate, Stated Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DividendsPayableCurrent_6025b4f0-59b9-4b6b-9dd3-f69220fa3ce4_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsPayableCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends payable (note 15)</link:label>
    <link:label id="lab_us-gaap_DividendsPayableCurrent_label_en-US" xlink:label="lab_us-gaap_DividendsPayableCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends Payable, Current</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsPayableCurrent" xlink:to="lab_us-gaap_DividendsPayableCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_EmployeeBenefitsDisclosureTable_8e0612ab-6b41-4aad-a6ca-d135184bcecf_terseLabel_en-US" xlink:label="lab_aqunf_EmployeeBenefitsDisclosureTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee Benefits Disclosure [Table]</link:label>
    <link:label id="lab_aqunf_EmployeeBenefitsDisclosureTable_label_en-US" xlink:label="lab_aqunf_EmployeeBenefitsDisclosureTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee Benefits Disclosure [Table]</link:label>
    <link:label id="lab_aqunf_EmployeeBenefitsDisclosureTable_documentation_en-US" xlink:label="lab_aqunf_EmployeeBenefitsDisclosureTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee Benefits Disclosure [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_EmployeeBenefitsDisclosureTable" xlink:href="aqunf-20201231.xsd#aqunf_EmployeeBenefitsDisclosureTable"/>
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    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_e0d13106-ddb0-4c2e-bd4a-49c1f95dcb5a_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Options exercised (in shares)</link:label>
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    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_AssetRetirementAndEnvironmentalObligations_a8207974-d137-41b6-8b0c-a6372758f79a_negatedTerseLabel_en-US" xlink:label="lab_aqunf_AssetRetirementAndEnvironmentalObligations" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset retirements and environmental obligations</link:label>
    <link:label id="lab_aqunf_AssetRetirementAndEnvironmentalObligations_label_en-US" xlink:label="lab_aqunf_AssetRetirementAndEnvironmentalObligations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Retirement And Environmental Obligations</link:label>
    <link:label id="lab_aqunf_AssetRetirementAndEnvironmentalObligations_documentation_en-US" xlink:label="lab_aqunf_AssetRetirementAndEnvironmentalObligations" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Retirement And Environmental Obligations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_AssetRetirementAndEnvironmentalObligations" xlink:href="aqunf-20201231.xsd#aqunf_AssetRetirementAndEnvironmentalObligations"/>
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    <link:label id="lab_aqunf_NewEnglandNaturalGasSystemMember_a6f85f60-3a15-46b9-9e43-aaf2487943df_terseLabel_en-US" xlink:label="lab_aqunf_NewEnglandNaturalGasSystemMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New England Natural Gas System</link:label>
    <link:label id="lab_aqunf_NewEnglandNaturalGasSystemMember_label_en-US" xlink:label="lab_aqunf_NewEnglandNaturalGasSystemMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New England Natural Gas System [Member]</link:label>
    <link:label id="lab_aqunf_NewEnglandNaturalGasSystemMember_documentation_en-US" xlink:label="lab_aqunf_NewEnglandNaturalGasSystemMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New England Natural Gas System</link:label>
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    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_e5773e24-9246-417d-97e5-7de2206ec8d6_totalLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase in cash, cash equivalents and restricted cash</link:label>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_label_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
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    <link:label id="lab_us-gaap_NonoperatingIncomeExpense_321e228a-ca35-48a1-9df3-bced2cc196eb_totalLabel_en-US" xlink:label="lab_us-gaap_NonoperatingIncomeExpense" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Nonoperating Income (Expense)</link:label>
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    <link:label id="lab_us-gaap_EmployeeStockOptionMember_70f28e46-a969-4001-a5cb-44c565d18e74_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeStockOptionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee Stock Option</link:label>
    <link:label id="lab_us-gaap_EmployeeStockOptionMember_60b75c58-9219-4d68-b237-24d411d7732e_verboseLabel_en-US" xlink:label="lab_us-gaap_EmployeeStockOptionMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share options</link:label>
    <link:label id="lab_us-gaap_EmployeeStockOptionMember_label_en-US" xlink:label="lab_us-gaap_EmployeeStockOptionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Payment Arrangement, Option [Member]</link:label>
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    <link:label id="lab_aqunf_RedeemablePreferredStockShareIssued_916b189b-82ab-4b98-9613-8c5974ab849b_verboseLabel_en-US" xlink:label="lab_aqunf_RedeemablePreferredStockShareIssued" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redeemable preferred stock issued, shares</link:label>
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    <link:label id="lab_us-gaap_AcquisitionCosts_a7da2201-a185-4d2d-b389-e0bbd89476f6_terseLabel_en-US" xlink:label="lab_us-gaap_AcquisitionCosts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisition and transition-related costs</link:label>
    <link:label id="lab_us-gaap_AcquisitionCosts_label_en-US" xlink:label="lab_us-gaap_AcquisitionCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisition Costs, Period Cost</link:label>
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    <link:label id="lab_us-gaap_SaleOfStockNameOfTransactionDomain_28b243e9-7885-428f-b75f-db88627b3bd2_terseLabel_en-US" xlink:label="lab_us-gaap_SaleOfStockNameOfTransactionDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale of Stock [Domain]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
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    <link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_02dd4624-dcb1-4a55-b626-1b8750944b90_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2025</link:label>
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    <link:label id="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_29c1e764-3f81-45de-b8b8-b3235d3dee02_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expected return on assets</link:label>
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    <link:label id="lab_us-gaap_AllowanceForDoubtfulAccountsReceivable_e7b02ae4-970b-4846-8e64-8fc022b6b898_negatedLabel_en-US" xlink:label="lab_us-gaap_AllowanceForDoubtfulAccountsReceivable" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Allowance for doubtful accounts</link:label>
    <link:label id="lab_us-gaap_AllowanceForDoubtfulAccountsReceivable_label_en-US" xlink:label="lab_us-gaap_AllowanceForDoubtfulAccountsReceivable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts Receivable, Allowance for Credit Loss</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInIncomeTaxesReceivable_5110e073-dc29-421b-b45d-66980a1a2854_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInIncomeTaxesReceivable" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income taxes recoverable</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_06ef80d6-622c-4985-be09-2eb206d807b7_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]</link:label>
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    <link:label id="lab_aqunf_OptionsandConvertibleDebenturesMember_87fb02df-20bb-4129-a263-13bdeb710a31_terseLabel_en-US" xlink:label="lab_aqunf_OptionsandConvertibleDebenturesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Options and Convertible Debentures</link:label>
    <link:label id="lab_aqunf_OptionsandConvertibleDebenturesMember_label_en-US" xlink:label="lab_aqunf_OptionsandConvertibleDebenturesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Options and Convertible Debentures [Member]</link:label>
    <link:label id="lab_aqunf_OptionsandConvertibleDebenturesMember_documentation_en-US" xlink:label="lab_aqunf_OptionsandConvertibleDebenturesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Convertible Debentures [Member]</link:label>
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    <link:label id="lab_aqunf_PaymentForOptionToPurchaseInvestment_602dcb12-b787-4100-920f-f92da87081a5_terseLabel_en-US" xlink:label="lab_aqunf_PaymentForOptionToPurchaseInvestment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment for option to purchase investments</link:label>
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    <link:label id="lab_aqunf_PaymentForOptionToPurchaseInvestment_documentation_en-US" xlink:label="lab_aqunf_PaymentForOptionToPurchaseInvestment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment for Option to Purchase Investment</link:label>
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    <link:label id="lab_us-gaap_OtherNonoperatingExpense_370361cf-e132-46d3-aa3f-7f9104825a32_negatedLabel_en-US" xlink:label="lab_us-gaap_OtherNonoperatingExpense" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other net losses (note 19)</link:label>
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    <link:label id="lab_dei_TradingSymbol_cbfdb8c4-69ea-4347-858b-d5fdf82c2f70_terseLabel_en-US" xlink:label="lab_dei_TradingSymbol" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trading Symbol</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RegulatoryLiabilityAxis" xlink:to="lab_us-gaap_RegulatoryLiabilityAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms_cafd5ca4-2d64-413a-9cb6-8ca0291264f5_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Outstanding, Weighted average remaining contractual term</link:label>
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    <link:label id="lab_aqunf_ExpansionCostsforPlantNotCurrentlyEarningReturn_e7ba8925-ea70-4ead-9480-a34416a44718_terseLabel_en-US" xlink:label="lab_aqunf_ExpansionCostsforPlantNotCurrentlyEarningReturn" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expansion costs</link:label>
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    <link:label id="lab_us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis_ff17b156-f2f7-4ec7-b437-61409be91b16_terseLabel_en-US" xlink:label="lab_us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulation Status [Axis]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis"/>
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    <link:label id="lab_aqunf_DividendandRedemptionPaymentsDiscounted_8fb961d5-4f12-4bfc-a4b0-aef91649a702_terseLabel_en-US" xlink:label="lab_aqunf_DividendandRedemptionPaymentsDiscounted" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred shares, Series C</link:label>
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    <link:label id="lab_aqunf_DividendandRedemptionPaymentsDiscounted_documentation_en-US" xlink:label="lab_aqunf_DividendandRedemptionPaymentsDiscounted" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividend and Redemption Payments, Discounted</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_DividendandRedemptionPaymentsDiscounted" xlink:href="aqunf-20201231.xsd#aqunf_DividendandRedemptionPaymentsDiscounted"/>
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    <link:label id="lab_aqunf_RegulatedServicesGroupMember_d09a3221-e4e5-43b7-91cd-3a19cc7a223c_terseLabel_en-US" xlink:label="lab_aqunf_RegulatedServicesGroupMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulated Services Group</link:label>
    <link:label id="lab_aqunf_RegulatedServicesGroupMember_label_en-US" xlink:label="lab_aqunf_RegulatedServicesGroupMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulated Services Group [Member]</link:label>
    <link:label id="lab_aqunf_RegulatedServicesGroupMember_documentation_en-US" xlink:label="lab_aqunf_RegulatedServicesGroupMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulated Services Group</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_RegulatedServicesGroupMember" xlink:href="aqunf-20201231.xsd#aqunf_RegulatedServicesGroupMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_RegulatedServicesGroupMember" xlink:to="lab_aqunf_RegulatedServicesGroupMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_5a7e78e0-4e5b-4a12-b723-27cbf62fe703_terseLabel_en-US" xlink:label="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements [Abstract]</link:label>
    <link:label id="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_label_en-US" xlink:label="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements [Abstract]</link:label>
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    <link:label id="lab_aqunf_CommonlyOwnedNumberofElectricGeneratingFacilities_9689ba07-2dce-43e9-8cfc-fd2eea7bfac0_terseLabel_en-US" xlink:label="lab_aqunf_CommonlyOwnedNumberofElectricGeneratingFacilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of electric generating facilities</link:label>
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    <link:label id="lab_us-gaap_EquipmentMember_22d49747-0907-4ab8-bac4-d35d4e60f904_terseLabel_en-US" xlink:label="lab_us-gaap_EquipmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equipment and other</link:label>
    <link:label id="lab_us-gaap_EquipmentMember_dd2f4e23-b0dd-4e09-9d0a-b4c814ee0083_verboseLabel_en-US" xlink:label="lab_us-gaap_EquipmentMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equipment</link:label>
    <link:label id="lab_us-gaap_EquipmentMember_label_en-US" xlink:label="lab_us-gaap_EquipmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equipment [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquipmentMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquipmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquipmentMember" xlink:to="lab_us-gaap_EquipmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_AccrualForEnvironmentalLossContingenciesUndiscounted_a26d9c60-1698-43c6-9485-d99620258fde_terseLabel_en-US" xlink:label="lab_aqunf_AccrualForEnvironmentalLossContingenciesUndiscounted" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Undiscounted, unescalated cost of environmental cleanup activities</link:label>
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    <link:label id="lab_us-gaap_SegmentReportingInformationLineItems_d49c8d3a-cb9d-49a0-8a4a-bdfa57d41f0c_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingInformationLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segment Reporting Information [Line Items]</link:label>
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    <link:label id="lab_us-gaap_DeferredCreditsAndOtherLiabilitiesCurrent_16ac64fe-dd5d-4fc9-9389-3f29b0566248_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredCreditsAndOtherLiabilitiesCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other long-term liabilities (note 12)</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredCreditsAndOtherLiabilitiesCurrent" xlink:to="lab_us-gaap_DeferredCreditsAndOtherLiabilitiesCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsAggregateIntrinsicValueExercisable_9f36add1-475b-4c24-a275-5493e155b4cd_terseLabel_en-US" xlink:label="lab_aqunf_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsAggregateIntrinsicValueExercisable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercisable, aggregate intrinsic value</link:label>
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    <link:label id="lab_us-gaap_RegulatoryAgencyDomain_2ed6b8ec-f8ae-46d9-96d8-54051051fef6_terseLabel_en-US" xlink:label="lab_us-gaap_RegulatoryAgencyDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulatory Agency [Domain]</link:label>
    <link:label id="lab_us-gaap_RegulatoryAgencyDomain_label_en-US" xlink:label="lab_us-gaap_RegulatoryAgencyDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulatory Agency [Domain]</link:label>
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    <link:label id="lab_us-gaap_BusinessCombinationsPolicy_68b2a259-aafc-4366-a373-62220e7e9fe7_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationsPolicy" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business combinations, intangible assets and goodwill</link:label>
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    <link:label id="lab_us-gaap_ContractualObligationDueInFifthYear_12ee69f1-ec3a-4786-bcc4-6eb455558129_terseLabel_en-US" xlink:label="lab_us-gaap_ContractualObligationDueInFifthYear" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Year 5</link:label>
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    <link:label id="lab_aqunf_DividendsTable_d4bfb18f-1206-4f94-91d0-3ecbdbe7bf0e_terseLabel_en-US" xlink:label="lab_aqunf_DividendsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends [Table]</link:label>
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    <link:label id="lab_aqunf_DividendsTable_documentation_en-US" xlink:label="lab_aqunf_DividendsTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_DividendsTable" xlink:href="aqunf-20201231.xsd#aqunf_DividendsTable"/>
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    <link:label id="lab_aqunf_PurchasedPowerMember_dae3dab3-4dab-469f-852c-d46583995963_terseLabel_en-US" xlink:label="lab_aqunf_PurchasedPowerMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Power purchase</link:label>
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    <link:label id="lab_aqunf_PurchasedPowerMember_documentation_en-US" xlink:label="lab_aqunf_PurchasedPowerMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchased Power [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_PurchasedPowerMember" xlink:href="aqunf-20201231.xsd#aqunf_PurchasedPowerMember"/>
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    <link:label id="lab_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_04bd90c5-1fdb-4549-ac4b-8c9f791e70f2_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated other comprehensive income (loss)</link:label>
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    <link:label id="lab_us-gaap_LesseeLeasesPolicyTextBlock_9a141203-ff9d-4e3e-b643-137354ae993c_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeLeasesPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases</link:label>
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    <link:label id="lab_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_c1bf5097-68d1-4a9f-80a3-1c0735751e45_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Development fees charged to the Company</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty" xlink:to="lab_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ContractualObligation_0956fbe3-3063-4067-91f0-7b1cfb25a738_terseLabel_en-US" xlink:label="lab_us-gaap_ContractualObligation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Obligation to provide cash advances under purchase option agreement</link:label>
    <link:label id="lab_us-gaap_ContractualObligation_99d4912a-0914-4280-9e33-f4406d5e7ed5_totalLabel_en-US" xlink:label="lab_us-gaap_ContractualObligation" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total</link:label>
    <link:label id="lab_us-gaap_ContractualObligation_label_en-US" xlink:label="lab_us-gaap_ContractualObligation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contractual Obligation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractualObligation" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractualObligation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractualObligation" xlink:to="lab_us-gaap_ContractualObligation" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid_a4e18402-fdd9-494f-bbf6-dd45c0f59371_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Benefits paid</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid" xlink:to="lab_us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeAssets_0b42fce0-1a6f-4c82-847a-f47b5d6b8963_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative Asset</link:label>
    <link:label id="lab_us-gaap_DerivativeAssets_label_en-US" xlink:label="lab_us-gaap_DerivativeAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative Asset</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeAssets" xlink:to="lab_us-gaap_DerivativeAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_OtherLongTermLiabilities_47adb923-3858-4edc-82dc-a9740040d424_terseLabel_en-US" xlink:label="lab_aqunf_OtherLongTermLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_aqunf_OtherLongTermLiabilities_label_en-US" xlink:label="lab_aqunf_OtherLongTermLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Long Term Liabilities</link:label>
    <link:label id="lab_aqunf_OtherLongTermLiabilities_documentation_en-US" xlink:label="lab_aqunf_OtherLongTermLiabilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Long Term Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_OtherLongTermLiabilities" xlink:href="aqunf-20201231.xsd#aqunf_OtherLongTermLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_OtherLongTermLiabilities" xlink:to="lab_aqunf_OtherLongTermLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_LongTermInvestmentsandNotesReceivableTableTextBlock_dd6e6cb2-526a-4f6b-88f5-045d51871189_terseLabel_en-US" xlink:label="lab_aqunf_LongTermInvestmentsandNotesReceivableTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Investments</link:label>
    <link:label id="lab_aqunf_LongTermInvestmentsandNotesReceivableTableTextBlock_label_en-US" xlink:label="lab_aqunf_LongTermInvestmentsandNotesReceivableTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long Term Investments and Notes Receivable [Table Text Block]</link:label>
    <link:label id="lab_aqunf_LongTermInvestmentsandNotesReceivableTableTextBlock_documentation_en-US" xlink:label="lab_aqunf_LongTermInvestmentsandNotesReceivableTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long Term Investments.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_LongTermInvestmentsandNotesReceivableTableTextBlock" xlink:href="aqunf-20201231.xsd#aqunf_LongTermInvestmentsandNotesReceivableTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_LongTermInvestmentsandNotesReceivableTableTextBlock" xlink:to="lab_aqunf_LongTermInvestmentsandNotesReceivableTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditMember_94fcee5d-c0f4-4a79-8d1e-b436eab3e7a0_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line of Credit</link:label>
    <link:label id="lab_us-gaap_LineOfCreditMember_label_en-US" xlink:label="lab_us-gaap_LineOfCreditMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line of Credit [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditMember" xlink:to="lab_us-gaap_LineOfCreditMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PensionAndOtherPostretirementPlansPolicy_0a0d2854-76af-46f8-8e93-2dbba03f25b5_terseLabel_en-US" xlink:label="lab_us-gaap_PensionAndOtherPostretirementPlansPolicy" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pension and other post-employment plans</link:label>
    <link:label id="lab_us-gaap_PensionAndOtherPostretirementPlansPolicy_label_en-US" xlink:label="lab_us-gaap_PensionAndOtherPostretirementPlansPolicy" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pension and Other Postretirement Plans, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementPlansPolicy" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PensionAndOtherPostretirementPlansPolicy"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PensionAndOtherPostretirementPlansPolicy" xlink:to="lab_us-gaap_PensionAndOtherPostretirementPlansPolicy" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DeferredIncomeTaxLiabilitiesNet_4944a76c-b445-4576-800a-2cd80c974f41_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxLiabilitiesNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred income taxes (note 18)</link:label>
    <link:label id="lab_us-gaap_DeferredIncomeTaxLiabilitiesNet_ecc9ff8a-eaab-42f6-b0cb-d44f0b443d51_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxLiabilitiesNet" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax liabilities</link:label>
    <link:label id="lab_us-gaap_DeferredIncomeTaxLiabilitiesNet_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxLiabilitiesNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Income Tax Liabilities, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet" xlink:to="lab_us-gaap_DeferredIncomeTaxLiabilitiesNet" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_CanadianDollarSeniorUnsecuredNotesMember_eb2bcfae-4841-4b65-a50f-53c2491defc9_terseLabel_en-US" xlink:label="lab_aqunf_CanadianDollarSeniorUnsecuredNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Canadian Dollar Senior Unsecured Notes</link:label>
    <link:label id="lab_aqunf_CanadianDollarSeniorUnsecuredNotesMember_label_en-US" xlink:label="lab_aqunf_CanadianDollarSeniorUnsecuredNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Canadian Dollar Senior Unsecured Notes [Member]</link:label>
    <link:label id="lab_aqunf_CanadianDollarSeniorUnsecuredNotesMember_documentation_en-US" xlink:label="lab_aqunf_CanadianDollarSeniorUnsecuredNotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Canadian Dollar Senior Unsecured Notes [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_CanadianDollarSeniorUnsecuredNotesMember" xlink:href="aqunf-20201231.xsd#aqunf_CanadianDollarSeniorUnsecuredNotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_CanadianDollarSeniorUnsecuredNotesMember" xlink:to="lab_aqunf_CanadianDollarSeniorUnsecuredNotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_VariableInterestEntityNumberofPowerGeneratingFacilities_46fac870-7998-46e0-ad58-e566c29caa0d_terseLabel_en-US" xlink:label="lab_aqunf_VariableInterestEntityNumberofPowerGeneratingFacilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of power generating facilities</link:label>
    <link:label id="lab_aqunf_VariableInterestEntityNumberofPowerGeneratingFacilities_label_en-US" xlink:label="lab_aqunf_VariableInterestEntityNumberofPowerGeneratingFacilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable Interest Entity, Number of Power Generating Facilities</link:label>
    <link:label id="lab_aqunf_VariableInterestEntityNumberofPowerGeneratingFacilities_documentation_en-US" xlink:label="lab_aqunf_VariableInterestEntityNumberofPowerGeneratingFacilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable Interest Entity, Number of Power Generating Facilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_VariableInterestEntityNumberofPowerGeneratingFacilities" xlink:href="aqunf-20201231.xsd#aqunf_VariableInterestEntityNumberofPowerGeneratingFacilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_VariableInterestEntityNumberofPowerGeneratingFacilities" xlink:to="lab_aqunf_VariableInterestEntityNumberofPowerGeneratingFacilities" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_BusnessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDerivativeInstruments_67d6060a-0b9e-4fea-af6e-f34a1271e81f_negatedTerseLabel_en-US" xlink:label="lab_aqunf_BusnessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDerivativeInstruments" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative instruments</link:label>
    <link:label id="lab_aqunf_BusnessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDerivativeInstruments_label_en-US" xlink:label="lab_aqunf_BusnessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDerivativeInstruments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Busness Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Derivative Instruments</link:label>
    <link:label id="lab_aqunf_BusnessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDerivativeInstruments_documentation_en-US" xlink:label="lab_aqunf_BusnessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDerivativeInstruments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Busness Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Derivative Instruments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_BusnessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDerivativeInstruments" xlink:href="aqunf-20201231.xsd#aqunf_BusnessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDerivativeInstruments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_BusnessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDerivativeInstruments" xlink:to="lab_aqunf_BusnessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDerivativeInstruments" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromRepaymentsOfOtherLongTermDebt_63039bb9-8fa2-4c2c-93d3-f96b8245b7e0_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromRepaymentsOfOtherLongTermDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Decrease in other long-term liabilities</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfOtherLongTermDebt" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfOtherLongTermDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromRepaymentsOfOtherLongTermDebt" xlink:to="lab_us-gaap_ProceedsFromRepaymentsOfOtherLongTermDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_1ceba6fe-ebdd-44ed-b0b1-466baac388ba_verboseLabel_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets, net (note 6)</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:to="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_WildfireMitigationAndVegetationManagementMember_0b202129-8521-4c4a-b014-5ca5ce8832ae_terseLabel_en-US" xlink:label="lab_aqunf_WildfireMitigationAndVegetationManagementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Wildfire mitigation and vegetation management</link:label>
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    <link:label id="lab_aqunf_WildfireMitigationAndVegetationManagementMember_documentation_en-US" xlink:label="lab_aqunf_WildfireMitigationAndVegetationManagementMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Wildfire Mitigation and Vegetation Management</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_WildfireMitigationAndVegetationManagementMember" xlink:href="aqunf-20201231.xsd#aqunf_WildfireMitigationAndVegetationManagementMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_WildfireMitigationAndVegetationManagementMember" xlink:to="lab_aqunf_WildfireMitigationAndVegetationManagementMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CallOptionMember_ed3ea9d3-b331-49c9-a39f-d3994875fb1b_terseLabel_en-US" xlink:label="lab_us-gaap_CallOptionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Options</link:label>
    <link:label id="lab_us-gaap_CallOptionMember_label_en-US" xlink:label="lab_us-gaap_CallOptionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Call Option [Member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CallOptionMember" xlink:to="lab_us-gaap_CallOptionMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OperatingIncomeLoss_aebfd811-31c7-438c-aca9-d26463f8801a_totalLabel_en-US" xlink:label="lab_us-gaap_OperatingIncomeLoss" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating income</link:label>
    <link:label id="lab_us-gaap_OperatingIncomeLoss_label_en-US" xlink:label="lab_us-gaap_OperatingIncomeLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating Income (Loss)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingIncomeLoss" xlink:to="lab_us-gaap_OperatingIncomeLoss" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MinorityInterestDisclosureTextBlock_a47c79aa-783e-40c6-bd8b-0608b3f2414b_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-controlling Interests and Redeemable non-controlling Interest</link:label>
    <link:label id="lab_us-gaap_MinorityInterestDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_MinorityInterestDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Noncontrolling Interest Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDisclosureTextBlock" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MinorityInterestDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MinorityInterestDisclosureTextBlock" xlink:to="lab_us-gaap_MinorityInterestDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_OwnershipInterestCommonlyOwnedFacilities_62816c14-d62f-4727-a703-dffb45bd6e0f_terseLabel_en-US" xlink:label="lab_aqunf_OwnershipInterestCommonlyOwnedFacilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ownership interest in commonly owned facilities</link:label>
    <link:label id="lab_aqunf_OwnershipInterestCommonlyOwnedFacilities_label_en-US" xlink:label="lab_aqunf_OwnershipInterestCommonlyOwnedFacilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ownership Interest, Commonly Owned Facilities</link:label>
    <link:label id="lab_aqunf_OwnershipInterestCommonlyOwnedFacilities_documentation_en-US" xlink:label="lab_aqunf_OwnershipInterestCommonlyOwnedFacilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ownership Interest, Commonly Owned Facilities</link:label>
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    <link:label id="lab_aqunf_NetIncomeLossAttributabletoRedeemableNoncontrollingInterestHeldByRelatedParty_36782c2f-9b84-4e9a-8d99-43c17ffa9162_negatedTerseLabel_en-US" xlink:label="lab_aqunf_NetIncomeLossAttributabletoRedeemableNoncontrollingInterestHeldByRelatedParty" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redeemable non-controlling interest, held by related party</link:label>
    <link:label id="lab_aqunf_NetIncomeLossAttributabletoRedeemableNoncontrollingInterestHeldByRelatedParty_label_en-US" xlink:label="lab_aqunf_NetIncomeLossAttributabletoRedeemableNoncontrollingInterestHeldByRelatedParty" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Income (Loss) Attributable to Redeemable Noncontrolling Interest, Held By Related Party</link:label>
    <link:label id="lab_aqunf_NetIncomeLossAttributabletoRedeemableNoncontrollingInterestHeldByRelatedParty_documentation_en-US" xlink:label="lab_aqunf_NetIncomeLossAttributabletoRedeemableNoncontrollingInterestHeldByRelatedParty" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Income (Loss) Attributable to Redeemable Noncontrolling Interest, Held By Related Party</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_NetIncomeLossAttributabletoRedeemableNoncontrollingInterestHeldByRelatedParty" xlink:href="aqunf-20201231.xsd#aqunf_NetIncomeLossAttributabletoRedeemableNoncontrollingInterestHeldByRelatedParty"/>
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    <link:label id="lab_us-gaap_VariableRateAxis_31949ab3-53b7-418e-a444-4367e79c9a73_terseLabel_en-US" xlink:label="lab_us-gaap_VariableRateAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable Rate [Axis]</link:label>
    <link:label id="lab_us-gaap_VariableRateAxis_label_en-US" xlink:label="lab_us-gaap_VariableRateAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable Rate [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VariableRateAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableRateAxis" xlink:to="lab_us-gaap_VariableRateAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_OtherLongTermLiabilitiesDisclosureTextBlock_6d80b64b-7f77-4e12-984f-14ae84eff05e_terseLabel_en-US" xlink:label="lab_aqunf_OtherLongTermLiabilitiesDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other long-term liabilities</link:label>
    <link:label id="lab_aqunf_OtherLongTermLiabilitiesDisclosureTextBlock_label_en-US" xlink:label="lab_aqunf_OtherLongTermLiabilitiesDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Long Term Liabilities Disclosure [Text Block]</link:label>
    <link:label id="lab_aqunf_OtherLongTermLiabilitiesDisclosureTextBlock_documentation_en-US" xlink:label="lab_aqunf_OtherLongTermLiabilitiesDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Long Term Liabilities Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_OtherLongTermLiabilitiesDisclosureTextBlock" xlink:href="aqunf-20201231.xsd#aqunf_OtherLongTermLiabilitiesDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_OtherLongTermLiabilitiesDisclosureTextBlock" xlink:to="lab_aqunf_OtherLongTermLiabilitiesDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherInvestments_88673b48-bdbf-4700-b416-508ad9386dae_terseLabel_en-US" xlink:label="lab_us-gaap_OtherInvestments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_OtherInvestments_label_en-US" xlink:label="lab_us-gaap_OtherInvestments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInvestments" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherInvestments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherInvestments" xlink:to="lab_us-gaap_OtherInvestments" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8413deed-410e-42ef-a8f2-bb363a47f6f9_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Business Acquisitions, by Acquisition [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_label_en-US" xlink:label="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Business Acquisitions, by Acquisition [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:to="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommitmentsAndContingencies_893d7d51-3699-41c9-8595-b030f22e764a_terseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitments and contingencies (note 22)</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingencies" xlink:to="lab_us-gaap_CommitmentsAndContingencies" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_DefinedBenefitPlanPlanAssetsContributions_8a5430e6-d686-4baf-b7cd-1bdbad6572d6_terseLabel_en-US" xlink:label="lab_aqunf_DefinedBenefitPlanPlanAssetsContributions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contributions into funds</link:label>
    <link:label id="lab_aqunf_DefinedBenefitPlanPlanAssetsContributions_label_en-US" xlink:label="lab_aqunf_DefinedBenefitPlanPlanAssetsContributions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Plan Assets, Contributions</link:label>
    <link:label id="lab_aqunf_DefinedBenefitPlanPlanAssetsContributions_documentation_en-US" xlink:label="lab_aqunf_DefinedBenefitPlanPlanAssetsContributions" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Plan Assets, Contributions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_DefinedBenefitPlanPlanAssetsContributions" xlink:href="aqunf-20201231.xsd#aqunf_DefinedBenefitPlanPlanAssetsContributions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_DefinedBenefitPlanPlanAssetsContributions" xlink:to="lab_aqunf_DefinedBenefitPlanPlanAssetsContributions" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_5b4e4b72-4cd9-461b-80e1-27c5d6813525_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Award vesting period</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period</link:label>
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    <link:label id="lab_aqunf_PublicUtilityFutureServiceYearsOfEmployees_6c0c7d11-007c-4286-b1dc-09af623a650e_terseLabel_en-US" xlink:label="lab_aqunf_PublicUtilityFutureServiceYearsOfEmployees" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Future service years of employees</link:label>
    <link:label id="lab_aqunf_PublicUtilityFutureServiceYearsOfEmployees_label_en-US" xlink:label="lab_aqunf_PublicUtilityFutureServiceYearsOfEmployees" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Public Utility, Future Service Years of Employees</link:label>
    <link:label id="lab_aqunf_PublicUtilityFutureServiceYearsOfEmployees_documentation_en-US" xlink:label="lab_aqunf_PublicUtilityFutureServiceYearsOfEmployees" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Public Utility, Future Service Years of Employees</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_PublicUtilityFutureServiceYearsOfEmployees" xlink:href="aqunf-20201231.xsd#aqunf_PublicUtilityFutureServiceYearsOfEmployees"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_PublicUtilityFutureServiceYearsOfEmployees" xlink:to="lab_aqunf_PublicUtilityFutureServiceYearsOfEmployees" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_StockholdersEquityNoteTable_60ca75cc-2a9f-4960-b325-8625ed9894e0_terseLabel_en-US" xlink:label="lab_aqunf_StockholdersEquityNoteTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stockholders Equity Note [Table]</link:label>
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    <link:label id="lab_aqunf_StockholdersEquityNoteTable_documentation_en-US" xlink:label="lab_aqunf_StockholdersEquityNoteTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stockholders Equity Note [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_StockholdersEquityNoteTable" xlink:href="aqunf-20201231.xsd#aqunf_StockholdersEquityNoteTable"/>
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    <link:label id="lab_dei_EntityAddressStateOrProvince_965a6ca0-c593-4291-ad96-d6e0340a3b9f_terseLabel_en-US" xlink:label="lab_dei_EntityAddressStateOrProvince" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, State or Province</link:label>
    <link:label id="lab_dei_EntityAddressStateOrProvince_label_en-US" xlink:label="lab_dei_EntityAddressStateOrProvince" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, State or Province</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock_24cec3e9-471b-4e90-8e23-7c9b8374b82a_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Benefit Obligations Fair Value of Plan Assets and Funded Status</link:label>
    <link:label id="lab_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Defined Benefit Plans Disclosures [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock"/>
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    <link:label id="lab_aqunf_AbengoaInvestmentsMember_cdd878d9-3a1f-4b95-b689-eb8061c0f4a6_terseLabel_en-US" xlink:label="lab_aqunf_AbengoaInvestmentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Abengoa Investments</link:label>
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    <link:label id="lab_us-gaap_DeferredCreditsAndOtherLiabilities_0a1c88d1-c80c-415d-9ef0-c5f84fb02ede_totalLabel_en-US" xlink:label="lab_us-gaap_DeferredCreditsAndOtherLiabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other long-term liabilities</link:label>
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    <link:label id="lab_us-gaap_CreditConcentrationRiskMember_693a8ac4-e115-4058-b93c-7d142aa5612f_terseLabel_en-US" xlink:label="lab_us-gaap_CreditConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit Concentration Risk</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditConcentrationRiskMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CreditConcentrationRiskMember"/>
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    <link:label id="lab_aqunf_NonregulatedEnergySalesMember_d5e7cb15-529d-4728-8504-fde5902db59f_terseLabel_en-US" xlink:label="lab_aqunf_NonregulatedEnergySalesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-regulated Energy Sales</link:label>
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    <link:label id="lab_us-gaap_HedgingDesignationDomain_2c585f04-a5bd-4415-b605-67a70bf6dfe4_terseLabel_en-US" xlink:label="lab_us-gaap_HedgingDesignationDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging Designation [Domain]</link:label>
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    <link:label id="lab_aqunf_OtherNonoperatingExpenseTextBlock_350de26e-e096-4706-b6fe-85aef659af01_terseLabel_en-US" xlink:label="lab_aqunf_OtherNonoperatingExpenseTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other net losses</link:label>
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    <link:label id="lab_srt_ScenarioForecastMember_7114dfa8-9eeb-49b5-b11f-fee770e04d2d_terseLabel_en-US" xlink:label="lab_srt_ScenarioForecastMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Forecast</link:label>
    <link:label id="lab_srt_ScenarioForecastMember_label_en-US" xlink:label="lab_srt_ScenarioForecastMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Forecast [Member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ScenarioForecastMember" xlink:to="lab_srt_ScenarioForecastMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EarningsPerShareBasicAndDilutedAbstract_259e690e-3954-4726-8cad-e30e106c5f0f_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasicAndDilutedAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Per Share, Basic and Diluted [Abstract]</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareBasicAndDilutedAbstract_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasicAndDilutedAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Per Share, Basic and Diluted [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareBasicAndDilutedAbstract"/>
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    <link:label id="lab_aqunf_CompanyMatchEmployeeContributions5001To10000Member_ba267d2f-af4e-422a-ad57-0fd248b532d8_terseLabel_en-US" xlink:label="lab_aqunf_CompanyMatchEmployeeContributions5001To10000Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Company Match, Employee Contributions $5,001 to $10,000</link:label>
    <link:label id="lab_aqunf_CompanyMatchEmployeeContributions5001To10000Member_label_en-US" xlink:label="lab_aqunf_CompanyMatchEmployeeContributions5001To10000Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Company Match, Employee Contributions $5,001 to $10,000 [Member]</link:label>
    <link:label id="lab_aqunf_CompanyMatchEmployeeContributions5001To10000Member_documentation_en-US" xlink:label="lab_aqunf_CompanyMatchEmployeeContributions5001To10000Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Company Match, Employee Contributions $5,001 to $10,000</link:label>
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    <link:label id="lab_us-gaap_UnrealizedGainLossOnInvestments_472cc63f-47fa-4d69-a54e-154aed9c9ad0_negatedLabel_en-US" xlink:label="lab_us-gaap_UnrealizedGainLossOnInvestments" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in value of investments carried at fair value</link:label>
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    <link:label id="lab_us-gaap_TaxCreditCarryforwardAxis_207a7071-880c-465f-b99e-14a585b419f1_terseLabel_en-US" xlink:label="lab_us-gaap_TaxCreditCarryforwardAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Tax Carryforward [Axis]</link:label>
    <link:label id="lab_us-gaap_TaxCreditCarryforwardAxis_label_en-US" xlink:label="lab_us-gaap_TaxCreditCarryforwardAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax Credit Carryforward [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TaxCreditCarryforwardAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TaxCreditCarryforwardAxis" xlink:to="lab_us-gaap_TaxCreditCarryforwardAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_NoteReceivableNameAxis_c3ce59cf-8d5b-40d2-bfd1-b532b7296ac6_terseLabel_en-US" xlink:label="lab_aqunf_NoteReceivableNameAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Note Receivable, Name [Axis]</link:label>
    <link:label id="lab_aqunf_NoteReceivableNameAxis_label_en-US" xlink:label="lab_aqunf_NoteReceivableNameAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Note Receivable, Name [Axis]</link:label>
    <link:label id="lab_aqunf_NoteReceivableNameAxis_documentation_en-US" xlink:label="lab_aqunf_NoteReceivableNameAxis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Note Receivable, Name [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_NoteReceivableNameAxis" xlink:href="aqunf-20201231.xsd#aqunf_NoteReceivableNameAxis"/>
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    <link:label id="lab_us-gaap_CreditFacilityAxis_30d92874-e4d5-4943-a070-0b3cac1525cf_terseLabel_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit Facility [Axis]</link:label>
    <link:label id="lab_us-gaap_CreditFacilityAxis_label_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit Facility [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CreditFacilityAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CreditFacilityAxis" xlink:to="lab_us-gaap_CreditFacilityAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_NumberOfLawsuits_709bdc2e-c0b9-46b9-a907-6909c207786f_terseLabel_en-US" xlink:label="lab_aqunf_NumberOfLawsuits" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of lawsuits filed</link:label>
    <link:label id="lab_aqunf_NumberOfLawsuits_label_en-US" xlink:label="lab_aqunf_NumberOfLawsuits" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of Lawsuits</link:label>
    <link:label id="lab_aqunf_NumberOfLawsuits_documentation_en-US" xlink:label="lab_aqunf_NumberOfLawsuits" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of Lawsuits</link:label>
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    <link:label id="lab_us-gaap_PreferredStockSharesIssued_6e04ebe4-d4fc-4d37-90cc-9515199a888b_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockSharesIssued" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred stock issued (in shares)</link:label>
    <link:label id="lab_us-gaap_PreferredStockSharesIssued_label_en-US" xlink:label="lab_us-gaap_PreferredStockSharesIssued" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred Stock, Shares Issued</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesIssued" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PreferredStockSharesIssued"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockSharesIssued" xlink:to="lab_us-gaap_PreferredStockSharesIssued" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations_13116389-d009-40ba-8329-559114f95f38_negatedLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Forfeited (in shares)</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures and Expirations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeLiabilitiesNoncurrent_c6939e4c-c02c-4fbe-9dc1-b89d91da579a_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeLiabilitiesNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative instruments (note 24)</link:label>
    <link:label id="lab_us-gaap_DerivativeLiabilitiesNoncurrent_label_en-US" xlink:label="lab_us-gaap_DerivativeLiabilitiesNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative Liability, Noncurrent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesNoncurrent" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeLiabilitiesNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeLiabilitiesNoncurrent" xlink:to="lab_us-gaap_DerivativeLiabilitiesNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_CapitalLeasedAssetsandPlantPropertyandEquipmentOwnedbyConsolidatedVIEGross_b12e86c8-0bcb-4491-acd0-08325e91c2c4_terseLabel_en-US" xlink:label="lab_aqunf_CapitalLeasedAssetsandPlantPropertyandEquipmentOwnedbyConsolidatedVIEGross" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Renewable generation assets related to facilities under capital lease and owned by consolidated VIE</link:label>
    <link:label id="lab_aqunf_CapitalLeasedAssetsandPlantPropertyandEquipmentOwnedbyConsolidatedVIEGross_label_en-US" xlink:label="lab_aqunf_CapitalLeasedAssetsandPlantPropertyandEquipmentOwnedbyConsolidatedVIEGross" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital Leased Assets and Plant Property and Equipment Owned by Consolidated VIE, Gross</link:label>
    <link:label id="lab_aqunf_CapitalLeasedAssetsandPlantPropertyandEquipmentOwnedbyConsolidatedVIEGross_documentation_en-US" xlink:label="lab_aqunf_CapitalLeasedAssetsandPlantPropertyandEquipmentOwnedbyConsolidatedVIEGross" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital Leased Assets and Plant Property and Equipment Owned by Consolidated VIE, Gross</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_CapitalLeasedAssetsandPlantPropertyandEquipmentOwnedbyConsolidatedVIEGross" xlink:href="aqunf-20201231.xsd#aqunf_CapitalLeasedAssetsandPlantPropertyandEquipmentOwnedbyConsolidatedVIEGross"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_CapitalLeasedAssetsandPlantPropertyandEquipmentOwnedbyConsolidatedVIEGross" xlink:to="lab_aqunf_CapitalLeasedAssetsandPlantPropertyandEquipmentOwnedbyConsolidatedVIEGross" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_BusinessCombinationsAbstract_16d1f721-1b4f-4242-98f6-3ddf79fd3c38_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Combinations [Abstract]</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationsAbstract_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Combinations [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationsAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationsAbstract" xlink:to="lab_us-gaap_BusinessCombinationsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_CommitmentsDisclosureLineItems_8d205d1c-04df-4c82-a1bc-294559cb14ac_terseLabel_en-US" xlink:label="lab_aqunf_CommitmentsDisclosureLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitments Disclosure [Line Items]</link:label>
    <link:label id="lab_aqunf_CommitmentsDisclosureLineItems_label_en-US" xlink:label="lab_aqunf_CommitmentsDisclosureLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitments Disclosure [Line Items]</link:label>
    <link:label id="lab_aqunf_CommitmentsDisclosureLineItems_documentation_en-US" xlink:label="lab_aqunf_CommitmentsDisclosureLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitments Disclosure [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_CommitmentsDisclosureLineItems" xlink:href="aqunf-20201231.xsd#aqunf_CommitmentsDisclosureLineItems"/>
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    <link:label id="lab_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentEquipmentUsefulLife_0b532b17-2d10-4116-a57a-7ec4c447e480_terseLabel_en-US" xlink:label="lab_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentEquipmentUsefulLife" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average useful life of assets</link:label>
    <link:label id="lab_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentEquipmentUsefulLife_label_en-US" xlink:label="lab_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentEquipmentUsefulLife" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Public Utilities, Property, Plant and Equipment, Equipment, Useful Life</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentEquipmentUsefulLife" xlink:to="lab_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentEquipmentUsefulLife" xlink:type="arc" order="1"/>
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    <link:label id="lab_aqunf_GaiaPowerInc.vsAPUCMember_4f75b9c6-9c5d-4274-afe8-4efad3b12ef2_terseLabel_en-US" xlink:label="lab_aqunf_GaiaPowerInc.vsAPUCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gaia Power Inc. vs APUC</link:label>
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    <link:label id="lab_aqunf_DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYearPostSixtyFive_9b0dfb72-609b-4123-855a-5e0e04d257ec_terseLabel_en-US" xlink:label="lab_aqunf_DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYearPostSixtyFive" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Age 65 and after</link:label>
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    <link:label id="lab_us-gaap_RelatedPartyDomain_5d287807-54fe-4423-915c-26c4391ea782_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related Party [Domain]</link:label>
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    <link:label id="lab_aqunf_OtherFiniteLivedIntangibleAssetsMember_004684a0-dbb5-42e6-826c-1b5fa8626afe_terseLabel_en-US" xlink:label="lab_aqunf_OtherFiniteLivedIntangibleAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
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    <link:label id="lab_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_6be86538-68e6-4715-8fbc-ed1cf55d47cf_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Available to be drawn on senior debt facilities</link:label>
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    <link:label id="lab_aqunf_WindPowerCapacity_803a3d72-4500-4f7b-97aa-bc64048e8178_terseLabel_en-US" xlink:label="lab_aqunf_WindPowerCapacity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Wind power capacity (megawatt AC)</link:label>
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    <link:label id="lab_aqunf_WindPowerCapacity_documentation_en-US" xlink:label="lab_aqunf_WindPowerCapacity" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Wind Power Capacity</link:label>
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    <link:label id="lab_us-gaap_RelatedPartyTransactionLineItems_684a4d45-b066-4641-b7f4-bf72ac3b9e04_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transactions with Third Party [Line Items]</link:label>
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    <link:label id="lab_us-gaap_DerivativeInstrumentRiskAxis_07e3125c-cae0-4826-b5bf-88d7787bbdeb_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative Instrument [Axis]</link:label>
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    <link:label id="lab_aqunf_SanAntonioWaterSystemJointVentureMember_565316ec-f836-4345-9464-e9143ffa1186_terseLabel_en-US" xlink:label="lab_aqunf_SanAntonioWaterSystemJointVentureMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">San Antonio Water System, Joint Venture</link:label>
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    <link:label id="lab_aqunf_AYESCanadaMember_ff8b4788-cf4b-4d7a-947a-717f402113a0_netLabel_en-US" xlink:label="lab_aqunf_AYESCanadaMember" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Atlantica Yield Energy Solutions Canada Inc.</link:label>
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    <link:label id="lab_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_label_en-US" xlink:label="lab_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward" xlink:to="lab_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_StatementScenarioAxis_90ed2955-7038-4b33-a908-0914b66ab663_terseLabel_en-US" xlink:label="lab_srt_StatementScenarioAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Scenario [Axis]</link:label>
    <link:label id="lab_srt_StatementScenarioAxis_label_en-US" xlink:label="lab_srt_StatementScenarioAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Scenario [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementScenarioAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_StatementScenarioAxis" xlink:to="lab_srt_StatementScenarioAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeLiabilitiesCurrent_d1678410-fb47-4ed1-a380-9b99d9cc9999_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeLiabilitiesCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative instruments (note 24)</link:label>
    <link:label id="lab_us-gaap_DerivativeLiabilitiesCurrent_label_en-US" xlink:label="lab_us-gaap_DerivativeLiabilitiesCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative Liability, Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesCurrent" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeLiabilitiesCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeLiabilitiesCurrent" xlink:to="lab_us-gaap_DerivativeLiabilitiesCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_Security12bTitle_9508c08d-8c8a-475b-a87d-38a668435ad4_terseLabel_en-US" xlink:label="lab_dei_Security12bTitle" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:label id="lab_dei_Security12bTitle_label_en-US" xlink:label="lab_dei_Security12bTitle" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_Security12bTitle"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_Security12bTitle" xlink:to="lab_dei_Security12bTitle" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet_1a70c369-18b8-4da4-9a0e-10e10fb7d9f2_terseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign currency gain on settlement of derivative</link:label>
    <link:label id="lab_us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet_label_en-US" xlink:label="lab_us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet" xlink:to="lab_us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_4bb79165-182b-439d-873a-8bc833915983_totalLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net book value</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_b47c2592-7faf-4c98-84cd-0562bebc3bdd_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finite-Lived Intangible Assets, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsNet" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_8f7293d1-aa9d-45f9-aa3d-50960b8d8983_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current assets (note 11)</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_15506330-8dff-447a-b10e-39c28492ec74_verboseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">OPEB plan assets</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets for Plan Benefits, Defined Benefit Plan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent" xlink:to="lab_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_RegulatedGasMember_f2297e8a-7301-4471-9982-d5ea99610f9a_terseLabel_en-US" xlink:label="lab_aqunf_RegulatedGasMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulated gas distribution</link:label>
    <link:label id="lab_aqunf_RegulatedGasMember_label_en-US" xlink:label="lab_aqunf_RegulatedGasMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulated Gas [Member]</link:label>
    <link:label id="lab_aqunf_RegulatedGasMember_documentation_en-US" xlink:label="lab_aqunf_RegulatedGasMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulated Gas [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_RegulatedGasMember" xlink:href="aqunf-20201231.xsd#aqunf_RegulatedGasMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_RegulatedGasMember" xlink:to="lab_aqunf_RegulatedGasMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ContractualObligationDueInNextTwelveMonths_a8e00f27-360d-4c3b-acd9-aca31ea1c768_terseLabel_en-US" xlink:label="lab_us-gaap_ContractualObligationDueInNextTwelveMonths" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Year 1</link:label>
    <link:label id="lab_us-gaap_ContractualObligationDueInNextTwelveMonths_label_en-US" xlink:label="lab_us-gaap_ContractualObligationDueInNextTwelveMonths" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contractual Obligation, to be Paid, Year One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractualObligationDueInNextTwelveMonths" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractualObligationDueInNextTwelveMonths"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractualObligationDueInNextTwelveMonths" xlink:to="lab_us-gaap_ContractualObligationDueInNextTwelveMonths" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestPayableCurrentAndNoncurrent_f7edfcfe-0ffd-463f-80e0-f38b887d0105_terseLabel_en-US" xlink:label="lab_us-gaap_InterestPayableCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest on long-term debt</link:label>
    <link:label id="lab_us-gaap_InterestPayableCurrentAndNoncurrent_label_en-US" xlink:label="lab_us-gaap_InterestPayableCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest Payable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrentAndNoncurrent" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestPayableCurrentAndNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestPayableCurrentAndNoncurrent" xlink:to="lab_us-gaap_InterestPayableCurrentAndNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestExpense_6390299f-e7d4-4cb1-afbf-728bcbd8826f_terseLabel_en-US" xlink:label="lab_us-gaap_InterestExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest expense on long-term debt and others</link:label>
    <link:label id="lab_us-gaap_InterestExpense_aa49fddf-6f81-44b3-9530-f39c35c7f1c6_negatedLabel_en-US" xlink:label="lab_us-gaap_InterestExpense" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest expense</link:label>
    <link:label id="lab_us-gaap_InterestExpense_label_en-US" xlink:label="lab_us-gaap_InterestExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpense" xlink:to="lab_us-gaap_InterestExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_SaleOfStockConsiderationReceivedOnTransactionGross_f2f80dd4-1a8f-450e-aee2-a9bb76cf14a8_terseLabel_en-US" xlink:label="lab_aqunf_SaleOfStockConsiderationReceivedOnTransactionGross" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash proceeds from issuance of shares</link:label>
    <link:label id="lab_aqunf_SaleOfStockConsiderationReceivedOnTransactionGross_label_en-US" xlink:label="lab_aqunf_SaleOfStockConsiderationReceivedOnTransactionGross" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale Of Stock, Consideration Received On Transaction, Gross</link:label>
    <link:label id="lab_aqunf_SaleOfStockConsiderationReceivedOnTransactionGross_documentation_en-US" xlink:label="lab_aqunf_SaleOfStockConsiderationReceivedOnTransactionGross" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale Of Stock, Consideration Received On Transaction, Gross</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_SaleOfStockConsiderationReceivedOnTransactionGross" xlink:href="aqunf-20201231.xsd#aqunf_SaleOfStockConsiderationReceivedOnTransactionGross"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_SaleOfStockConsiderationReceivedOnTransactionGross" xlink:to="lab_aqunf_SaleOfStockConsiderationReceivedOnTransactionGross" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_DebtPremiumMember_c2a6c33e-58d6-490f-b0ef-c863b32713bb_terseLabel_en-US" xlink:label="lab_aqunf_DebtPremiumMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt premium</link:label>
    <link:label id="lab_aqunf_DebtPremiumMember_label_en-US" xlink:label="lab_aqunf_DebtPremiumMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Premium [Member]</link:label>
    <link:label id="lab_aqunf_DebtPremiumMember_documentation_en-US" xlink:label="lab_aqunf_DebtPremiumMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Premium [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_DebtPremiumMember" xlink:href="aqunf-20201231.xsd#aqunf_DebtPremiumMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_DebtPremiumMember" xlink:to="lab_aqunf_DebtPremiumMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfCapitalizationTable_5c4c47e8-942d-4fb2-90c8-4ff0e973354a_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfCapitalizationTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Capitalization [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfCapitalizationTable_label_en-US" xlink:label="lab_us-gaap_ScheduleOfCapitalizationTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Capitalization [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCapitalizationTable" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfCapitalizationTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfCapitalizationTable" xlink:to="lab_us-gaap_ScheduleOfCapitalizationTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DepreciationDepletionAndAmortization_220c5027-0b84-4394-bd8c-30af3cd8fe7b_verboseLabel_en-US" xlink:label="lab_us-gaap_DepreciationDepletionAndAmortization" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation and amortization</link:label>
    <link:label id="lab_us-gaap_DepreciationDepletionAndAmortization_6455b8aa-a952-46ce-b4cd-15b860d38286_terseLabel_en-US" xlink:label="lab_us-gaap_DepreciationDepletionAndAmortization" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation and amortization</link:label>
    <link:label id="lab_us-gaap_DepreciationDepletionAndAmortization_label_en-US" xlink:label="lab_us-gaap_DepreciationDepletionAndAmortization" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation, Depletion and Amortization</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepreciationDepletionAndAmortization" xlink:to="lab_us-gaap_DepreciationDepletionAndAmortization" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_8d5766d3-1ce8-4620-b995-9cddf678de62_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-controlling interest (percent)</link:label>
    <link:label id="lab_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_label_en-US" xlink:label="lab_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners</link:label>
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    <link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_c04283a8-0bf3-4d03-b9bf-87013efee856_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2022</link:label>
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    <link:label id="lab_us-gaap_AssetRetirementObligationCostsMember_f8fb4141-04a4-4e83-a8df-90ef60ebac97_terseLabel_en-US" xlink:label="lab_us-gaap_AssetRetirementObligationCostsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset retirement obligation</link:label>
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    <link:label id="lab_aqunf_NumberOfInterestRateSwapsRedesignatedAsCashFlowHedges_532f5083-0abe-44a8-a2e0-3c3799a1ced0_terseLabel_en-US" xlink:label="lab_aqunf_NumberOfInterestRateSwapsRedesignatedAsCashFlowHedges" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of interest rate swaps redesignated as cash flow hedges</link:label>
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    <link:label id="lab_us-gaap_IncomeTaxReceivable_cda0952e-0efe-4d56-8f93-4b7307bcea6a_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReceivable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income taxes recoverable</link:label>
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    <link:label id="lab_us-gaap_ConstructionLoanPayableMember_ea0f27cf-2da2-4f3a-bdfa-8f1c08d99d31_terseLabel_en-US" xlink:label="lab_us-gaap_ConstructionLoanPayableMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Construction Loan Payable</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_e5f8b844-8794-4775-aeac-21826c53d507_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Provision for Income Taxes</link:label>
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    <link:label id="lab_us-gaap_ElectricGenerationEquipmentMember_ff71ab48-c08a-4940-aa35-2bb3a5cd9e1c_terseLabel_en-US" xlink:label="lab_us-gaap_ElectricGenerationEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Generation</link:label>
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    <link:label id="lab_dei_LegalEntityAxis_de400e12-b2b8-4a07-a122-ccd25638641c_terseLabel_en-US" xlink:label="lab_dei_LegalEntityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Legal Entity [Axis]</link:label>
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    <link:label id="lab_aqunf_NumberOfRightToBeIssuedWithEachShareOfCommonStock_a8e3a18e-24da-4dad-b7b6-b285af0facbc_terseLabel_en-US" xlink:label="lab_aqunf_NumberOfRightToBeIssuedWithEachShareOfCommonStock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of voting rights per share</link:label>
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    <link:label id="lab_aqunf_SugarCreekMember_c5d8a8ae-6378-4e49-bddb-14f203a1c2d1_terseLabel_en-US" xlink:label="lab_aqunf_SugarCreekMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sugar Creek</link:label>
    <link:label id="lab_aqunf_SugarCreekMember_label_en-US" xlink:label="lab_aqunf_SugarCreekMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sugar Creek [Member]</link:label>
    <link:label id="lab_aqunf_SugarCreekMember_documentation_en-US" xlink:label="lab_aqunf_SugarCreekMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sugar Creek</link:label>
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    <link:label id="lab_aqunf_SaleOfStockAveragePricePerShare_ad297054-30dc-4e68-89d5-542fa9002a4e_terseLabel_en-US" xlink:label="lab_aqunf_SaleOfStockAveragePricePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale of stock, average price per share (in USD)</link:label>
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    <link:label id="lab_dei_DocumentPeriodEndDate_bb387765-e565-4d12-9fb4-1c23050435a5_terseLabel_en-US" xlink:label="lab_dei_DocumentPeriodEndDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Period End Date</link:label>
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    <link:label id="lab_us-gaap_MandatorilyRedeemablePreferredStockFairValueDisclosure_37ff3455-7750-48d1-95cb-5bf10ccce47e_terseLabel_en-US" xlink:label="lab_us-gaap_MandatorilyRedeemablePreferredStockFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred shares, Series C</link:label>
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    <link:label id="lab_aqunf_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsExercisableWeightedAverageGrantDateFairValue_22091528-6098-484c-a081-e41d2bd8a628_terseLabel_en-US" xlink:label="lab_aqunf_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsExercisableWeightedAverageGrantDateFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercisable (CAD per share)</link:label>
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    <link:label id="lab_us-gaap_NetInvestmentHedgingMember_0660494f-8c1b-4a50-943e-eecfad2e3f27_terseLabel_en-US" xlink:label="lab_us-gaap_NetInvestmentHedgingMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Investment Hedging</link:label>
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    <link:label id="lab_us-gaap_DividendsDeclaredTableTextBlock_98b808a1-58b5-4b82-bc95-2abbffb104bd_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsDeclaredTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends</link:label>
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    <link:label id="lab_aqunf_VariousMember_c02d7750-43af-4c91-a39c-43476e2bdc3c_terseLabel_en-US" xlink:label="lab_aqunf_VariousMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Various</link:label>
    <link:label id="lab_aqunf_VariousMember_label_en-US" xlink:label="lab_aqunf_VariousMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Various [Member]</link:label>
    <link:label id="lab_aqunf_VariousMember_documentation_en-US" xlink:label="lab_aqunf_VariousMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Various</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_VariousMember" xlink:href="aqunf-20201231.xsd#aqunf_VariousMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_VariousMember" xlink:to="lab_aqunf_VariousMember" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_COVID19PandemicPolicyPolicyTextBlock_4351d988-38ac-45e9-b7da-ed26cdf2fb2f_terseLabel_en-US" xlink:label="lab_aqunf_COVID19PandemicPolicyPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">COVID-19 pandemic</link:label>
    <link:label id="lab_aqunf_COVID19PandemicPolicyPolicyTextBlock_label_en-US" xlink:label="lab_aqunf_COVID19PandemicPolicyPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">COVID-19 Pandemic, Policy [Policy Text Block]</link:label>
    <link:label id="lab_aqunf_COVID19PandemicPolicyPolicyTextBlock_documentation_en-US" xlink:label="lab_aqunf_COVID19PandemicPolicyPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">COVID-19 Pandemic, Policy</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_COVID19PandemicPolicyPolicyTextBlock" xlink:href="aqunf-20201231.xsd#aqunf_COVID19PandemicPolicyPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_COVID19PandemicPolicyPolicyTextBlock" xlink:to="lab_aqunf_COVID19PandemicPolicyPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant_d5dbbb35-a2c8-459e-adf8-09efe1fc321e_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contributions from retirees</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant" xlink:to="lab_us-gaap_DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_PeriodInForceOptionToPurchaseInvestment_3776f9a2-3da2-4e9a-a5b2-35ed21858762_terseLabel_en-US" xlink:label="lab_aqunf_PeriodInForceOptionToPurchaseInvestment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Term of option to purchase investment</link:label>
    <link:label id="lab_aqunf_PeriodInForceOptionToPurchaseInvestment_label_en-US" xlink:label="lab_aqunf_PeriodInForceOptionToPurchaseInvestment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Period in Force, Option to Purchase Investment</link:label>
    <link:label id="lab_aqunf_PeriodInForceOptionToPurchaseInvestment_documentation_en-US" xlink:label="lab_aqunf_PeriodInForceOptionToPurchaseInvestment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Period in Force, Option to Purchase Investment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_PeriodInForceOptionToPurchaseInvestment" xlink:href="aqunf-20201231.xsd#aqunf_PeriodInForceOptionToPurchaseInvestment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_PeriodInForceOptionToPurchaseInvestment" xlink:to="lab_aqunf_PeriodInForceOptionToPurchaseInvestment" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AssetRetirementObligationsNoncurrent_40f73488-16f7-43bf-9a7b-165b3791b9da_terseLabel_en-US" xlink:label="lab_us-gaap_AssetRetirementObligationsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset retirement obligations</link:label>
    <link:label id="lab_us-gaap_AssetRetirementObligationsNoncurrent_1ce4d208-78b1-4d9e-a6af-17ca4e48bfa8_periodStartLabel_en-US" xlink:label="lab_us-gaap_AssetRetirementObligationsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opening balance</link:label>
    <link:label id="lab_us-gaap_AssetRetirementObligationsNoncurrent_616c996c-fc94-4fdf-8ff5-a597037ab47d_periodEndLabel_en-US" xlink:label="lab_us-gaap_AssetRetirementObligationsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Closing balance</link:label>
    <link:label id="lab_us-gaap_AssetRetirementObligationsNoncurrent_label_en-US" xlink:label="lab_us-gaap_AssetRetirementObligationsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Retirement Obligations, Noncurrent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetRetirementObligationsNoncurrent" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetRetirementObligationsNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetRetirementObligationsNoncurrent" xlink:to="lab_us-gaap_AssetRetirementObligationsNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtSecuritiesMember_4c32e1a9-9800-4ed2-b519-97efb1d45e60_terseLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt securities</link:label>
    <link:label id="lab_us-gaap_DebtSecuritiesMember_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Securities [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtSecuritiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecuritiesMember" xlink:to="lab_us-gaap_DebtSecuritiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DefinedBenefitPlanServiceCost_fb2d9d3b-3a09-4cfc-981b-0a582e3e38ea_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanServiceCost" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Service cost</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanServiceCost_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanServiceCost" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Service Cost</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanServiceCost" xlink:to="lab_us-gaap_DefinedBenefitPlanServiceCost" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ConcentrationRiskByBenchmarkAxis_62fd0342-757c-4507-8aeb-b6bc80201f53_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Concentration Risk Benchmark [Axis]</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskByBenchmarkAxis_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Concentration Risk Benchmark [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:to="lab_us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CustomerRelationshipsMember_0f6922ee-48dc-4d7b-bfe2-d731141bcc82_terseLabel_en-US" xlink:label="lab_us-gaap_CustomerRelationshipsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer Relationships</link:label>
    <link:label id="lab_us-gaap_CustomerRelationshipsMember_label_en-US" xlink:label="lab_us-gaap_CustomerRelationshipsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer Relationships [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CustomerRelationshipsMember" xlink:to="lab_us-gaap_CustomerRelationshipsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CostOfGoodsAndServicesSold_4e2d30e0-93ff-4f08-a495-a338e3aa1647_terseLabel_en-US" xlink:label="lab_us-gaap_CostOfGoodsAndServicesSold" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expenses</link:label>
    <link:label id="lab_us-gaap_CostOfGoodsAndServicesSold_label_en-US" xlink:label="lab_us-gaap_CostOfGoodsAndServicesSold" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cost of Goods and Services Sold</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CostOfGoodsAndServicesSold" xlink:to="lab_us-gaap_CostOfGoodsAndServicesSold" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_SuccessionandRetirementExpense_57c4a4d9-4b03-4c49-844d-e8e64afde2a5_terseLabel_en-US" xlink:label="lab_aqunf_SuccessionandRetirementExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Succession and retirement expense</link:label>
    <link:label id="lab_aqunf_SuccessionandRetirementExpense_label_en-US" xlink:label="lab_aqunf_SuccessionandRetirementExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Succession and Retirement Expense</link:label>
    <link:label id="lab_aqunf_SuccessionandRetirementExpense_documentation_en-US" xlink:label="lab_aqunf_SuccessionandRetirementExpense" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Succession and Retirement Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_SuccessionandRetirementExpense" xlink:href="aqunf-20201231.xsd#aqunf_SuccessionandRetirementExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_SuccessionandRetirementExpense" xlink:to="lab_aqunf_SuccessionandRetirementExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CostsAndExpenses_5693c656-5f19-47bd-8d0e-eaee21ff468f_totalLabel_en-US" xlink:label="lab_us-gaap_CostsAndExpenses" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Costs and Expenses, Total</link:label>
    <link:label id="lab_us-gaap_CostsAndExpenses_label_en-US" xlink:label="lab_us-gaap_CostsAndExpenses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Costs and Expenses</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostsAndExpenses"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CostsAndExpenses" xlink:to="lab_us-gaap_CostsAndExpenses" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax_a852f7a7-ffd2-4ed3-beac-78e0209922b4_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in fair value of cash flow hedges, net of tax recovery of $9,046 and tax expense of $3,862 respectively (note 24(b)(ii))</link:label>
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    <link:label id="lab_us-gaap_StatementEquityComponentsAxis_453bf1ce-f806-4fdd-a0d1-2b91314e3e20_terseLabel_en-US" xlink:label="lab_us-gaap_StatementEquityComponentsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity Components [Axis]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementEquityComponentsAxis" xlink:to="lab_us-gaap_StatementEquityComponentsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodIntrinsicValue_395ab696-9781-4ea8-adf8-32288889a09d_terseLabel_en-US" xlink:label="lab_aqunf_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodIntrinsicValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Granted, aggregate intrinsic value</link:label>
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    <link:label id="lab_us-gaap_AssetRetirementObligationsPolicy_d013c639-b7fd-454f-8268-e3ef485f9e45_terseLabel_en-US" xlink:label="lab_us-gaap_AssetRetirementObligationsPolicy" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset retirement obligations</link:label>
    <link:label id="lab_us-gaap_AssetRetirementObligationsPolicy_label_en-US" xlink:label="lab_us-gaap_AssetRetirementObligationsPolicy" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Retirement Obligation [Policy Text Block]</link:label>
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    <link:label id="lab_us-gaap_UnderlyingDerivativeLiability_8ec0aef6-b7eb-42ce-b8ef-7c433aa364af_terseLabel_en-US" xlink:label="lab_us-gaap_UnderlyingDerivativeLiability" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subscription purchase agreement, share price (in USD)</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnderlyingDerivativeLiability" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnderlyingDerivativeLiability"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnderlyingDerivativeLiability" xlink:to="lab_us-gaap_UnderlyingDerivativeLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_128a499f-4129-44da-ac1b-d9e59549a899_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from sale of long-lived assets</link:label>
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    <link:label id="lab_us-gaap_NumberOfReportableSegments_04df0350-b14b-4991-8357-08b208508e45_terseLabel_en-US" xlink:label="lab_us-gaap_NumberOfReportableSegments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of reportable segments</link:label>
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    <link:label id="lab_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_297c6436-6bf2-4ade-b20a-a7fca6c35a6a_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additional deferred credits related to investment in San Antonio Water System</link:label>
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    <link:label id="lab_us-gaap_RetirementPlanTypeDomain_f0486614-a52d-42bd-a5be-a6bcc7045422_terseLabel_en-US" xlink:label="lab_us-gaap_RetirementPlanTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retirement Plan Type [Domain]</link:label>
    <link:label id="lab_us-gaap_RetirementPlanTypeDomain_label_en-US" xlink:label="lab_us-gaap_RetirementPlanTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retirement Plan Type [Domain]</link:label>
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    <link:label id="lab_aqunf_CommitmentsDisclosureTableTextBlock_381cea01-88b8-41ff-a424-2296e8a5db36_terseLabel_en-US" xlink:label="lab_aqunf_CommitmentsDisclosureTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Estimates of Future Commitments</link:label>
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    <link:label id="lab_aqunf_PeriodTwoMember_4bccb2bc-a582-45ad-b759-bb0d8b62dbb7_terseLabel_en-US" xlink:label="lab_aqunf_PeriodTwoMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Due 2 to 3 years</link:label>
    <link:label id="lab_aqunf_PeriodTwoMember_label_en-US" xlink:label="lab_aqunf_PeriodTwoMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Period Two [Member]</link:label>
    <link:label id="lab_aqunf_PeriodTwoMember_documentation_en-US" xlink:label="lab_aqunf_PeriodTwoMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Period 2 [Member]</link:label>
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    <link:label id="lab_us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths_8ec5ae94-50bd-477e-9163-47abe6c256e9_terseLabel_en-US" xlink:label="lab_us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrealized gains in AOCI to be reclassified</link:label>
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    <link:label id="lab_aqunf_ReimbursementofExpensesReceivedbyRelatedParties_ef248512-006c-4f18-9a7c-c829c56a467a_terseLabel_en-US" xlink:label="lab_aqunf_ReimbursementofExpensesReceivedbyRelatedParties" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reimbursement of expenses</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfEquityMethodInvestmentsTable_d8744900-1908-4116-a5bd-13a76a007adf_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Equity Method Investments [Table]</link:label>
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    <link:label id="lab_us-gaap_ForwardContractsMember_66fa0e25-ecc4-4e49-8664-d8d0c21ea690_terseLabel_en-US" xlink:label="lab_us-gaap_ForwardContractsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Forward contracts</link:label>
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    <link:label id="lab_aqunf_AccrualforEnvironmentalLossContingenciesIncreaseDecreaseforRevisioninAssumptions_fff49a09-67c2-4dcf-95d0-62e07abf04cb_terseLabel_en-US" xlink:label="lab_aqunf_AccrualforEnvironmentalLossContingenciesIncreaseDecreaseforRevisioninAssumptions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revision in assumptions</link:label>
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    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_a30ddef5-bf9f-451f-aa34-82e3fc3ba530_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additions to AOCI</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NondesignatedMember_f53f5f50-87e0-462f-8018-96e8e52d7ea4_terseLabel_en-US" xlink:label="lab_us-gaap_NondesignatedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Not designated as a hedge</link:label>
    <link:label id="lab_us-gaap_NondesignatedMember_d7c5ae7a-bd2d-4452-bfb5-c0224cfb63de_verboseLabel_en-US" xlink:label="lab_us-gaap_NondesignatedMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Not Designated as Hedging Instrument</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NondesignatedMember" xlink:to="lab_us-gaap_NondesignatedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccountsReceivableNetCurrent_38b9b84e-8c9c-44c2-80da-d453412a52c5_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in pension and other post-employment benefits, net of tax recovery of $6,881 and $2,735, respectively (note 10)</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfOtherNonoperatingExpenseByComponentTextBlock_01604d71-a6b6-4b99-a369-47ca25168300_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfOtherNonoperatingExpenseByComponentTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Other Net Losses</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfOtherNonoperatingExpenseByComponentTextBlock" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfOtherNonoperatingExpenseByComponentTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfOtherNonoperatingExpenseByComponentTextBlock" xlink:to="lab_us-gaap_ScheduleOfOtherNonoperatingExpenseByComponentTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DeferredTaxAssetsOther_0fd7afc7-a306-4ef0-bbc7-8875b44851d0_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsOther" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsOther_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsOther" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Tax Assets, Other</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsOther" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredTaxAssetsOther"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsOther" xlink:to="lab_us-gaap_DeferredTaxAssetsOther" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NoncontrollingInterestAbstract_6f541b71-3084-41f4-b184-9f14a8492b31_terseLabel_en-US" xlink:label="lab_us-gaap_NoncontrollingInterestAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Noncontrolling Interest [Abstract]</link:label>
    <link:label id="lab_us-gaap_NoncontrollingInterestAbstract_label_en-US" xlink:label="lab_us-gaap_NoncontrollingInterestAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Noncontrolling Interest [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestAbstract" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NoncontrollingInterestAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoncontrollingInterestAbstract" xlink:to="lab_us-gaap_NoncontrollingInterestAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_ExpendituresCommonlyOwnedFacilities_00832125-d730-49df-a57c-92a5b3e8d6c3_terseLabel_en-US" xlink:label="lab_aqunf_ExpendituresCommonlyOwnedFacilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expenditures</link:label>
    <link:label id="lab_aqunf_ExpendituresCommonlyOwnedFacilities_label_en-US" xlink:label="lab_aqunf_ExpendituresCommonlyOwnedFacilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expenditures, Commonly Owned Facilities</link:label>
    <link:label id="lab_aqunf_ExpendituresCommonlyOwnedFacilities_documentation_en-US" xlink:label="lab_aqunf_ExpendituresCommonlyOwnedFacilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expenditures, Commonly Owned Facilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_ExpendituresCommonlyOwnedFacilities" xlink:href="aqunf-20201231.xsd#aqunf_ExpendituresCommonlyOwnedFacilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_ExpendituresCommonlyOwnedFacilities" xlink:to="lab_aqunf_ExpendituresCommonlyOwnedFacilities" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RegulatoryLiabilitiesLineItems_5fbf87c0-37d4-4f44-a263-94f425597763_terseLabel_en-US" xlink:label="lab_us-gaap_RegulatoryLiabilitiesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulatory Liabilities [Line Items]</link:label>
    <link:label id="lab_us-gaap_RegulatoryLiabilitiesLineItems_label_en-US" xlink:label="lab_us-gaap_RegulatoryLiabilitiesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Regulatory Liabilities [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilitiesLineItems" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RegulatoryLiabilitiesLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RegulatoryLiabilitiesLineItems" xlink:to="lab_us-gaap_RegulatoryLiabilitiesLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DefinedBenefitPlanBusinessCombinationsAndAcquisitionsBenefitObligation_f64f2730-a208-462b-9f4d-eb41c6979ae8_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanBusinessCombinationsAndAcquisitionsBenefitObligation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Projected benefit obligation assumed from business combination</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanBusinessCombinationsAndAcquisitionsBenefitObligation_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanBusinessCombinationsAndAcquisitionsBenefitObligation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Benefit Obligation, Business Combination</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanBusinessCombinationsAndAcquisitionsBenefitObligation" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanBusinessCombinationsAndAcquisitionsBenefitObligation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanBusinessCombinationsAndAcquisitionsBenefitObligation" xlink:to="lab_us-gaap_DefinedBenefitPlanBusinessCombinationsAndAcquisitionsBenefitObligation" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_18cea2c8-43de-4b1f-893c-5ac997e18b8f_terseLabel_en-US" xlink:label="lab_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign currency translation</link:label>
    <link:label id="lab_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign Currency Transactions and Translations Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:to="lab_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_NetIncomeLossAttributabletoNoncontrollingInterestHeldByRelatedParty_2a17d2e3-8ea6-4c95-b3dc-38037423af3b_negatedTerseLabel_en-US" xlink:label="lab_aqunf_NetIncomeLossAttributabletoNoncontrollingInterestHeldByRelatedParty" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-controlling interests held by related party (note 16(b))</link:label>
    <link:label id="lab_aqunf_NetIncomeLossAttributabletoNoncontrollingInterestHeldByRelatedParty_ce8c3188-e551-4943-8ec1-de569be6a323_terseLabel_en-US" xlink:label="lab_aqunf_NetIncomeLossAttributabletoNoncontrollingInterestHeldByRelatedParty" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-controlling interest attributable to subsidiary</link:label>
    <link:label id="lab_aqunf_NetIncomeLossAttributabletoNoncontrollingInterestHeldByRelatedParty_label_en-US" xlink:label="lab_aqunf_NetIncomeLossAttributabletoNoncontrollingInterestHeldByRelatedParty" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Income (Loss) Attributable to Noncontrolling Interest, Held By Related Party</link:label>
    <link:label id="lab_aqunf_NetIncomeLossAttributabletoNoncontrollingInterestHeldByRelatedParty_documentation_en-US" xlink:label="lab_aqunf_NetIncomeLossAttributabletoNoncontrollingInterestHeldByRelatedParty" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Income (Loss) Attributable to Noncontrolling Interest, Held By Related Party</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_NetIncomeLossAttributabletoNoncontrollingInterestHeldByRelatedParty" xlink:href="aqunf-20201231.xsd#aqunf_NetIncomeLossAttributabletoNoncontrollingInterestHeldByRelatedParty"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_NetIncomeLossAttributabletoNoncontrollingInterestHeldByRelatedParty" xlink:to="lab_aqunf_NetIncomeLossAttributabletoNoncontrollingInterestHeldByRelatedParty" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInIncomeTaxes_5fd2a03a-adc0-4971-8996-424e866594dd_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInIncomeTaxes" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current income tax liability</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInIncomeTaxes_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInIncomeTaxes" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Income Taxes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInIncomeTaxes" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInIncomeTaxes"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInIncomeTaxes" xlink:to="lab_us-gaap_IncreaseDecreaseInIncomeTaxes" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_FairValueOfFinancialInstrumentsTable_9e04cc44-77e4-47dd-9fb6-b65c6a7d265c_terseLabel_en-US" xlink:label="lab_aqunf_FairValueOfFinancialInstrumentsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value of Financial Instruments [Table]</link:label>
    <link:label id="lab_aqunf_FairValueOfFinancialInstrumentsTable_label_en-US" xlink:label="lab_aqunf_FairValueOfFinancialInstrumentsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value Of Financial Instruments [Table]</link:label>
    <link:label id="lab_aqunf_FairValueOfFinancialInstrumentsTable_documentation_en-US" xlink:label="lab_aqunf_FairValueOfFinancialInstrumentsTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value of Financial Instruments [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_FairValueOfFinancialInstrumentsTable" xlink:href="aqunf-20201231.xsd#aqunf_FairValueOfFinancialInstrumentsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_FairValueOfFinancialInstrumentsTable" xlink:to="lab_aqunf_FairValueOfFinancialInstrumentsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_CapitalLeasedAssetsandPlantPropertyandEquipmentOwnedbyConsolidatedVIEAccumulatedDepreciation_e77159fe-7b3d-4060-b9c9-857eb3726970_terseLabel_en-US" xlink:label="lab_aqunf_CapitalLeasedAssetsandPlantPropertyandEquipmentOwnedbyConsolidatedVIEAccumulatedDepreciation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Renewable generation assets related to facilities under capital lease and owned by consolidated VIE, accumulated depreciation</link:label>
    <link:label id="lab_aqunf_CapitalLeasedAssetsandPlantPropertyandEquipmentOwnedbyConsolidatedVIEAccumulatedDepreciation_label_en-US" xlink:label="lab_aqunf_CapitalLeasedAssetsandPlantPropertyandEquipmentOwnedbyConsolidatedVIEAccumulatedDepreciation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital Leased Assets and Plant Property and Equipment Owned by Consolidated VIE, Accumulated Depreciation</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_aqunf_CapitalLeasedAssetsandPlantPropertyandEquipmentOwnedbyConsolidatedVIEAccumulatedDepreciation" xlink:href="aqunf-20201231.xsd#aqunf_CapitalLeasedAssetsandPlantPropertyandEquipmentOwnedbyConsolidatedVIEAccumulatedDepreciation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_CapitalLeasedAssetsandPlantPropertyandEquipmentOwnedbyConsolidatedVIEAccumulatedDepreciation" xlink:to="lab_aqunf_CapitalLeasedAssetsandPlantPropertyandEquipmentOwnedbyConsolidatedVIEAccumulatedDepreciation" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_CapitalizedOperatingAndMaintenanceCostsRecoveryPeriod_bd7da904-50e8-4f2c-840d-09bfedfe0b70_terseLabel_en-US" xlink:label="lab_aqunf_CapitalizedOperatingAndMaintenanceCostsRecoveryPeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capitalized operating and maintenance costs, recovery period</link:label>
    <link:label id="lab_aqunf_CapitalizedOperatingAndMaintenanceCostsRecoveryPeriod_label_en-US" xlink:label="lab_aqunf_CapitalizedOperatingAndMaintenanceCostsRecoveryPeriod" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capitalized Operating and Maintenance Costs, Recovery Period</link:label>
    <link:label id="lab_aqunf_CapitalizedOperatingAndMaintenanceCostsRecoveryPeriod_documentation_en-US" xlink:label="lab_aqunf_CapitalizedOperatingAndMaintenanceCostsRecoveryPeriod" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capitalized Operating and Maintenance Costs, Recovery Period</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_CapitalizedOperatingAndMaintenanceCostsRecoveryPeriod" xlink:href="aqunf-20201231.xsd#aqunf_CapitalizedOperatingAndMaintenanceCostsRecoveryPeriod"/>
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    <link:label id="lab_us-gaap_Cash_c809bf8d-a625-4fbf-8d8d-d061a27d3f98_terseLabel_en-US" xlink:label="lab_us-gaap_Cash" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash on hand</link:label>
    <link:label id="lab_us-gaap_Cash_label_en-US" xlink:label="lab_us-gaap_Cash" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Cash" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Cash"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Cash" xlink:to="lab_us-gaap_Cash" xlink:type="arc" order="1"/>
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    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_LitigationCaseTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_LitigationCaseTypeDomain" xlink:to="lab_srt_LitigationCaseTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EarningsPerShareBasic_04be2f43-9f75-45ae-8376-208ebb88fcff_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Basic net earnings per share (USD per share)</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareBasic_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Per Share, Basic</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareBasic" xlink:to="lab_us-gaap_EarningsPerShareBasic" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_LongtermMaintenanceContractMember_747dbb1a-6e7d-45d2-b166-2524db597a65_terseLabel_en-US" xlink:label="lab_aqunf_LongtermMaintenanceContractMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term maintenance contract</link:label>
    <link:label id="lab_aqunf_LongtermMaintenanceContractMember_label_en-US" xlink:label="lab_aqunf_LongtermMaintenanceContractMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Maintenance Contract [Member]</link:label>
    <link:label id="lab_aqunf_LongtermMaintenanceContractMember_documentation_en-US" xlink:label="lab_aqunf_LongtermMaintenanceContractMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Maintenance Contract [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_LongtermMaintenanceContractMember" xlink:href="aqunf-20201231.xsd#aqunf_LongtermMaintenanceContractMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_LongtermMaintenanceContractMember" xlink:to="lab_aqunf_LongtermMaintenanceContractMember" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_AwardMatchDomain_19bb96b1-eeed-4b2b-82aa-c279928c715d_terseLabel_en-US" xlink:label="lab_aqunf_AwardMatchDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Award Match [Domain]</link:label>
    <link:label id="lab_aqunf_AwardMatchDomain_label_en-US" xlink:label="lab_aqunf_AwardMatchDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Award Match [Domain]</link:label>
    <link:label id="lab_aqunf_AwardMatchDomain_documentation_en-US" xlink:label="lab_aqunf_AwardMatchDomain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Award Match</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_AwardMatchDomain" xlink:href="aqunf-20201231.xsd#aqunf_AwardMatchDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_AwardMatchDomain" xlink:to="lab_aqunf_AwardMatchDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_6ed627ab-da99-4f2a-ab61-b83f52d88a28_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expected life</link:label>
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityFileNumber_010a4aa5-331f-4739-88ef-0afeaba8af6f_terseLabel_en-US" xlink:label="lab_dei_EntityFileNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity File Number</link:label>
    <link:label id="lab_dei_EntityFileNumber_label_en-US" xlink:label="lab_dei_EntityFileNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity File Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityFileNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityFileNumber" xlink:to="lab_dei_EntityFileNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_8fea6eff-cef9-4160-b4df-cdcd00152d15_terseLabel_en-US" xlink:label="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pension and other post-employment benefits obligation (note 10)</link:label>
    <link:label id="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_label_en-US" xlink:label="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liability, Defined Benefit Plan, Noncurrent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:to="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_e1fc2261-c16e-438c-9dc1-63b83d14f46d_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rate of compensation increase</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease" xlink:to="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_InterestRateSwapTwoMember_0f6bd0df-da90-40ef-b9ef-69b5bcbfeed7_terseLabel_en-US" xlink:label="lab_aqunf_InterestRateSwapTwoMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest Rate Swap Two</link:label>
    <link:label id="lab_aqunf_InterestRateSwapTwoMember_label_en-US" xlink:label="lab_aqunf_InterestRateSwapTwoMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest Rate Swap Two [Member]</link:label>
    <link:label id="lab_aqunf_InterestRateSwapTwoMember_documentation_en-US" xlink:label="lab_aqunf_InterestRateSwapTwoMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest Rate Swap Two</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_InterestRateSwapTwoMember" xlink:href="aqunf-20201231.xsd#aqunf_InterestRateSwapTwoMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_InterestRateSwapTwoMember" xlink:to="lab_aqunf_InterestRateSwapTwoMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromMinorityShareholders_87bc20ad-7e6e-42c9-bc15-affc3b5e5ea9_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromMinorityShareholders" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contributions from non-controlling interests and redeemable non-controlling interests (note 17)</link:label>
    <link:label id="lab_us-gaap_ProceedsFromMinorityShareholders_label_en-US" xlink:label="lab_us-gaap_ProceedsFromMinorityShareholders" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from Noncontrolling Interests</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromMinorityShareholders" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromMinorityShareholders"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromMinorityShareholders" xlink:to="lab_us-gaap_ProceedsFromMinorityShareholders" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DividendsCommonStock_ddeda1ca-97f4-495a-8b5c-55c36ed877e3_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsCommonStock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividend declared for common share holders</link:label>
    <link:label id="lab_us-gaap_DividendsCommonStock_label_en-US" xlink:label="lab_us-gaap_DividendsCommonStock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends, Common Stock</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DividendsCommonStock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsCommonStock" xlink:to="lab_us-gaap_DividendsCommonStock" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_EmpireDistrictElectricCompanyMember_6143bed7-f6dc-4aca-aee9-aaa4b5c338b1_terseLabel_en-US" xlink:label="lab_aqunf_EmpireDistrictElectricCompanyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Empire Electric System</link:label>
    <link:label id="lab_aqunf_EmpireDistrictElectricCompanyMember_label_en-US" xlink:label="lab_aqunf_EmpireDistrictElectricCompanyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Empire District Electric Company [Member]</link:label>
    <link:label id="lab_aqunf_EmpireDistrictElectricCompanyMember_documentation_en-US" xlink:label="lab_aqunf_EmpireDistrictElectricCompanyMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Empire District Electric Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_EmpireDistrictElectricCompanyMember" xlink:href="aqunf-20201231.xsd#aqunf_EmpireDistrictElectricCompanyMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_EmpireDistrictElectricCompanyMember" xlink:to="lab_aqunf_EmpireDistrictElectricCompanyMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_b655ae4d-c1f4-4037-90c4-302638508f95_periodStartLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Beginning balance, January 1</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_510422e9-f5aa-431f-a159-479a8d072ba8_periodEndLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ending balance, December 31</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax" xlink:to="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AllocatedShareBasedCompensationExpense_6ed94528-66a4-4639-855e-4c425ce00c3a_terseLabel_en-US" xlink:label="lab_us-gaap_AllocatedShareBasedCompensationExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based compensation expense</link:label>
    <link:label id="lab_us-gaap_AllocatedShareBasedCompensationExpense_8ef06087-c257-49be-b93c-97c36879de42_verboseLabel_en-US" xlink:label="lab_us-gaap_AllocatedShareBasedCompensationExpense" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total share-based compensation expense</link:label>
    <link:label id="lab_us-gaap_AllocatedShareBasedCompensationExpense_label_en-US" xlink:label="lab_us-gaap_AllocatedShareBasedCompensationExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Payment Arrangement, Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AllocatedShareBasedCompensationExpense" xlink:to="lab_us-gaap_AllocatedShareBasedCompensationExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_d074bf8a-6fd5-47df-8fb8-72c82d2430c9_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common shares issued under employee share purchase plan</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Issued During Period, Value, Employee Stock Purchase Plan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_OpenCommodityDerivativeContractsTableTextBlock_2ad69bd3-8e9e-4758-8c98-0de8d5bd50ed_terseLabel_en-US" xlink:label="lab_aqunf_OpenCommodityDerivativeContractsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-Term Energy Derivative Contracts</link:label>
    <link:label id="lab_aqunf_OpenCommodityDerivativeContractsTableTextBlock_label_en-US" xlink:label="lab_aqunf_OpenCommodityDerivativeContractsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Open Commodity Derivative Contracts [Table Text Block]</link:label>
    <link:label id="lab_aqunf_OpenCommodityDerivativeContractsTableTextBlock_documentation_en-US" xlink:label="lab_aqunf_OpenCommodityDerivativeContractsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Open Commodity Derivative Contracts.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_OpenCommodityDerivativeContractsTableTextBlock" xlink:href="aqunf-20201231.xsd#aqunf_OpenCommodityDerivativeContractsTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_OpenCommodityDerivativeContractsTableTextBlock" xlink:to="lab_aqunf_OpenCommodityDerivativeContractsTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_StockholdersEquityAttributabletoNoncontrollingInterestRelatedParty_0e3fc2db-ae59-4bd3-ac55-a0ea6490c8f0_terseLabel_en-US" xlink:label="lab_aqunf_StockholdersEquityAttributabletoNoncontrollingInterestRelatedParty" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-controlling interest, held by related party (note 16(c))</link:label>
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    <link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_77dd176f-e599-4f31-800c-6e21c691a385_terseLabel_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill and Intangible Assets Disclosure [Abstract]</link:label>
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    <link:label id="lab_aqunf_DevelopmentLoansMember_fc0e97f8-5978-4d45-ae2e-cbfff4bbc64e_terseLabel_en-US" xlink:label="lab_aqunf_DevelopmentLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Development loans</link:label>
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    <link:label id="lab_us-gaap_CommercialPaperMember_0eaff9b8-a5a7-450a-a6b7-4e11f7c66ba8_terseLabel_en-US" xlink:label="lab_us-gaap_CommercialPaperMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commercial Paper</link:label>
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    <link:label id="lab_aqunf_CanadianDollarSeniorSecuredProjectsNotesMember_0b9a91a6-78b3-41f2-9416-fefe725e2e02_terseLabel_en-US" xlink:label="lab_aqunf_CanadianDollarSeniorSecuredProjectsNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Canadian Dollar Senior Secured Project Notes</link:label>
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    <link:label id="lab_us-gaap_EquityComponentDomain_d7ddc41a-fb54-4b5b-9b99-b5dd3ba94e08_terseLabel_en-US" xlink:label="lab_us-gaap_EquityComponentDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity Component [Domain]</link:label>
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    <link:label id="lab_aqunf_CapitalProjectsMember_da1cc892-8368-4f66-8083-81a7ad61574a_terseLabel_en-US" xlink:label="lab_aqunf_CapitalProjectsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital projects</link:label>
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    <link:label id="lab_aqunf_CapitalProjectsMember_documentation_en-US" xlink:label="lab_aqunf_CapitalProjectsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital Projects</link:label>
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    <link:label id="lab_us-gaap_DerivativeAssetsNoncurrent_c8f58eb0-36c2-4ddc-97cb-60f4f7d640fa_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeAssetsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative instruments</link:label>
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    <link:label id="lab_aqunf_CoalGenerationCapacity_47a225b2-33bb-4644-bc77-234cc06580a8_terseLabel_en-US" xlink:label="lab_aqunf_CoalGenerationCapacity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Coal generation capacity (MW)</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_ed755b1f-f283-4683-b5a4-c5f34084fa3c_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expected Benefit Payments</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_d4caec09-786e-4e57-b114-78bb06bb657a_verboseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment, net (note 5)</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_f37922e6-cc5a-4cc0-91a8-943d13ca5923_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment</link:label>
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    <link:label id="lab_us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation_fbc7cb79-c6c6-4141-a19f-c37e030c074f_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign exchange</link:label>
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    <link:label id="lab_us-gaap_NetIncomeLoss_d9ababa4-58eb-49b2-bf22-2803687ce32d_totalLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net earnings attributable to shareholders of Algonquin Power&#160;&amp; Utilities Corp.</link:label>
    <link:label id="lab_us-gaap_NetIncomeLoss_85a75832-76b4-48d0-9aca-b7fc21a1d4db_terseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net earnings attributable to shareholders of AQN</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfCapitalizationLineItems_fe6db935-31c7-4d6b-bc25-83aad7c7acf3_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfCapitalizationLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Capitalization [Line Items]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfCapitalizationLineItems" xlink:to="lab_us-gaap_ScheduleOfCapitalizationLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ReceivablesBillingStatusDomain_51c987af-97b7-433a-99c4-f7d5258d03bd_terseLabel_en-US" xlink:label="lab_us-gaap_ReceivablesBillingStatusDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Receivables Billing Status [Domain]</link:label>
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    <link:label id="lab_us-gaap_DefinedBenefitPlanBusinessCombinationsAndAcquisitionsPlanAssets_261d22d7-dc68-4586-9460-ff0acd9f1779_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanBusinessCombinationsAndAcquisitionsPlanAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan assets acquired in business combination</link:label>
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    <link:label id="lab_aqunf_NumberOfUnitContingentPPAs_ac1cff6a-e877-431b-9daf-75f2a9a564a7_terseLabel_en-US" xlink:label="lab_aqunf_NumberOfUnitContingentPPAs" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of Unit Contingent PPAs</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfVariableInterestEntitiesTable_6bc324ac-880d-49d2-ad1c-5f7e5e742974_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfVariableInterestEntitiesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Variable Interest Entities [Table]</link:label>
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    <link:label id="lab_aqunf_DeferredTaxAssetsTaxDeferredExpenseReservesandAccrualsEnvironmentalObligations_b1135ff7-ee5d-42e6-acaa-a4aa9dcddfec_terseLabel_en-US" xlink:label="lab_aqunf_DeferredTaxAssetsTaxDeferredExpenseReservesandAccrualsEnvironmentalObligations" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Environmental obligation</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_DeferredTaxAssetsTaxDeferredExpenseReservesandAccrualsEnvironmentalObligations" xlink:to="lab_aqunf_DeferredTaxAssetsTaxDeferredExpenseReservesandAccrualsEnvironmentalObligations" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_EquityMethodInvestmentPrepaidPurchaseAgreement_14cd140f-f17e-4725-bdb8-772c354d8d46_terseLabel_en-US" xlink:label="lab_aqunf_EquityMethodInvestmentPrepaidPurchaseAgreement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Atlantica related prepaid amount</link:label>
    <link:label id="lab_aqunf_EquityMethodInvestmentPrepaidPurchaseAgreement_label_en-US" xlink:label="lab_aqunf_EquityMethodInvestmentPrepaidPurchaseAgreement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity Method Investment, Prepaid Purchase Agreement</link:label>
    <link:label id="lab_aqunf_EquityMethodInvestmentPrepaidPurchaseAgreement_documentation_en-US" xlink:label="lab_aqunf_EquityMethodInvestmentPrepaidPurchaseAgreement" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity Method Investment, Prepaid Purchase Agreement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_EquityMethodInvestmentPrepaidPurchaseAgreement" xlink:href="aqunf-20201231.xsd#aqunf_EquityMethodInvestmentPrepaidPurchaseAgreement"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_EquityMethodInvestmentPrepaidPurchaseAgreement" xlink:to="lab_aqunf_EquityMethodInvestmentPrepaidPurchaseAgreement" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AssetsNet_d322bb00-afa2-4dc9-b0f1-95b503b353ad_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Carrying amount</link:label>
    <link:label id="lab_us-gaap_AssetsNet_label_en-US" xlink:label="lab_us-gaap_AssetsNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNet" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsNet" xlink:to="lab_us-gaap_AssetsNet" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_StellaCranellAndEastRaymondTexasCoastalWindFacilitiesMember_65addb38-0904-42a3-99f5-f4c7fa2489b8_terseLabel_en-US" xlink:label="lab_aqunf_StellaCranellAndEastRaymondTexasCoastalWindFacilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stella, Cranell and East Raymond Texas Coastal Wind Facilities</link:label>
    <link:label id="lab_aqunf_StellaCranellAndEastRaymondTexasCoastalWindFacilitiesMember_label_en-US" xlink:label="lab_aqunf_StellaCranellAndEastRaymondTexasCoastalWindFacilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stella, Cranell and East Raymond Texas Coastal Wind Facilities [Member]</link:label>
    <link:label id="lab_aqunf_StellaCranellAndEastRaymondTexasCoastalWindFacilitiesMember_documentation_en-US" xlink:label="lab_aqunf_StellaCranellAndEastRaymondTexasCoastalWindFacilitiesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stella, Cranell and East Raymond Texas Coastal Wind Facilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_StellaCranellAndEastRaymondTexasCoastalWindFacilitiesMember" xlink:href="aqunf-20201231.xsd#aqunf_StellaCranellAndEastRaymondTexasCoastalWindFacilitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_StellaCranellAndEastRaymondTexasCoastalWindFacilitiesMember" xlink:to="lab_aqunf_StellaCranellAndEastRaymondTexasCoastalWindFacilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_CurrentFiscalYearEndDate_0062933a-1c12-4444-a5cd-f6a79e92c35e_terseLabel_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Fiscal Year End Date</link:label>
    <link:label id="lab_dei_CurrentFiscalYearEndDate_label_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Fiscal Year End Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_CurrentFiscalYearEndDate"/>
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    <link:label id="lab_us-gaap_PrivateEquityFundsMember_1037bc1e-f327-4777-b4e9-19fedbc2f027_terseLabel_en-US" xlink:label="lab_us-gaap_PrivateEquityFundsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Private Equity Funds</link:label>
    <link:label id="lab_us-gaap_PrivateEquityFundsMember_label_en-US" xlink:label="lab_us-gaap_PrivateEquityFundsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Private Equity Funds [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrivateEquityFundsMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PrivateEquityFundsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PrivateEquityFundsMember" xlink:to="lab_us-gaap_PrivateEquityFundsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_NorthForkRidgeMember_53997480-497f-46e8-a26f-b37692783758_terseLabel_en-US" xlink:label="lab_aqunf_NorthForkRidgeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">North Fork Ridge</link:label>
    <link:label id="lab_aqunf_NorthForkRidgeMember_label_en-US" xlink:label="lab_aqunf_NorthForkRidgeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">North Fork Ridge [Member]</link:label>
    <link:label id="lab_aqunf_NorthForkRidgeMember_documentation_en-US" xlink:label="lab_aqunf_NorthForkRidgeMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">North Fork Ridge</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_NorthForkRidgeMember" xlink:href="aqunf-20201231.xsd#aqunf_NorthForkRidgeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_NorthForkRidgeMember" xlink:to="lab_aqunf_NorthForkRidgeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_DividendsPayablePreferredStockCurrent_00e32c33-2a75-420c-8a88-f8d2db9c1187_negatedTerseLabel_en-US" xlink:label="lab_aqunf_DividendsPayablePreferredStockCurrent" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Less current portion</link:label>
    <link:label id="lab_aqunf_DividendsPayablePreferredStockCurrent_label_en-US" xlink:label="lab_aqunf_DividendsPayablePreferredStockCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends Payable, Preferred Stock, Current</link:label>
    <link:label id="lab_aqunf_DividendsPayablePreferredStockCurrent_documentation_en-US" xlink:label="lab_aqunf_DividendsPayablePreferredStockCurrent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends Payable, Preferred Stock, Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_DividendsPayablePreferredStockCurrent" xlink:href="aqunf-20201231.xsd#aqunf_DividendsPayablePreferredStockCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_DividendsPayablePreferredStockCurrent" xlink:to="lab_aqunf_DividendsPayablePreferredStockCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EquityContractMember_eb4ed67d-be99-4183-915f-0f0120c5725f_terseLabel_en-US" xlink:label="lab_us-gaap_EquityContractMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subscription Share Purchase Agreement</link:label>
    <link:label id="lab_us-gaap_EquityContractMember_34d961be-8b74-4926-ada1-8ace51d14841_verboseLabel_en-US" xlink:label="lab_us-gaap_EquityContractMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share contract</link:label>
    <link:label id="lab_us-gaap_EquityContractMember_label_en-US" xlink:label="lab_us-gaap_EquityContractMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity Contract [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityContractMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityContractMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityContractMember" xlink:to="lab_us-gaap_EquityContractMember" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_SaleOfPropertyPlantAndEquipmentIntangibleAssetsAndAccruedLiabilitiesInExchangeOfNoteReceivable_69e71d87-fd33-4269-aaea-9a53c56c4f5e_terseLabel_en-US" xlink:label="lab_aqunf_SaleOfPropertyPlantAndEquipmentIntangibleAssetsAndAccruedLiabilitiesInExchangeOfNoteReceivable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale of property, plant and equipment, intangible assets and accrued liabilities in exchange of note receivable</link:label>
    <link:label id="lab_aqunf_SaleOfPropertyPlantAndEquipmentIntangibleAssetsAndAccruedLiabilitiesInExchangeOfNoteReceivable_label_en-US" xlink:label="lab_aqunf_SaleOfPropertyPlantAndEquipmentIntangibleAssetsAndAccruedLiabilitiesInExchangeOfNoteReceivable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale of Property, Plant and Equipment, Intangible Assets and Accrued Liabilities in Exchange of Note Receivable</link:label>
    <link:label id="lab_aqunf_SaleOfPropertyPlantAndEquipmentIntangibleAssetsAndAccruedLiabilitiesInExchangeOfNoteReceivable_documentation_en-US" xlink:label="lab_aqunf_SaleOfPropertyPlantAndEquipmentIntangibleAssetsAndAccruedLiabilitiesInExchangeOfNoteReceivable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale of Property, Plant and Equipment, Intangible Assets and Accrued Liabilities in Exchange of Note Receivable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_SaleOfPropertyPlantAndEquipmentIntangibleAssetsAndAccruedLiabilitiesInExchangeOfNoteReceivable" xlink:href="aqunf-20201231.xsd#aqunf_SaleOfPropertyPlantAndEquipmentIntangibleAssetsAndAccruedLiabilitiesInExchangeOfNoteReceivable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_SaleOfPropertyPlantAndEquipmentIntangibleAssetsAndAccruedLiabilitiesInExchangeOfNoteReceivable" xlink:to="lab_aqunf_SaleOfPropertyPlantAndEquipmentIntangibleAssetsAndAccruedLiabilitiesInExchangeOfNoteReceivable" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_PercentageOfDiscountOnFairValueOfSharesUnderDividendReinvestmentPlan_6af281de-c93e-4e35-a184-8a001478d709_terseLabel_en-US" xlink:label="lab_aqunf_PercentageOfDiscountOnFairValueOfSharesUnderDividendReinvestmentPlan" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Discount rate on share purchases under dividend reinvestment plan (percent)</link:label>
    <link:label id="lab_aqunf_PercentageOfDiscountOnFairValueOfSharesUnderDividendReinvestmentPlan_label_en-US" xlink:label="lab_aqunf_PercentageOfDiscountOnFairValueOfSharesUnderDividendReinvestmentPlan" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage Of Discount On Fair Value Of Shares Under Dividend Reinvestment Plan</link:label>
    <link:label id="lab_aqunf_PercentageOfDiscountOnFairValueOfSharesUnderDividendReinvestmentPlan_documentation_en-US" xlink:label="lab_aqunf_PercentageOfDiscountOnFairValueOfSharesUnderDividendReinvestmentPlan" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage Of Discount On Fair Value Of Shares Under Dividend Reinvestment Plan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_PercentageOfDiscountOnFairValueOfSharesUnderDividendReinvestmentPlan" xlink:href="aqunf-20201231.xsd#aqunf_PercentageOfDiscountOnFairValueOfSharesUnderDividendReinvestmentPlan"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_PercentageOfDiscountOnFairValueOfSharesUnderDividendReinvestmentPlan" xlink:to="lab_aqunf_PercentageOfDiscountOnFairValueOfSharesUnderDividendReinvestmentPlan" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization_a5cb3602-b85b-4b72-be3b-b537429e68da_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated depreciation</link:label>
    <link:label id="lab_us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization_label_en-US" xlink:label="lab_us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance Lease, Right-of-Use Asset, Accumulated Amortization</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization" xlink:to="lab_us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_DefinedBenefitPlanNonserviceCostsAbstract_7449f90b-71f3-4f00-9c0c-bc237e5947ab_terseLabel_en-US" xlink:label="lab_aqunf_DefinedBenefitPlanNonserviceCostsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-service costs</link:label>
    <link:label id="lab_aqunf_DefinedBenefitPlanNonserviceCostsAbstract_label_en-US" xlink:label="lab_aqunf_DefinedBenefitPlanNonserviceCostsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Non-service Costs [Abstract]</link:label>
    <link:label id="lab_aqunf_DefinedBenefitPlanNonserviceCostsAbstract_documentation_en-US" xlink:label="lab_aqunf_DefinedBenefitPlanNonserviceCostsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Non-service Costs [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_DefinedBenefitPlanNonserviceCostsAbstract" xlink:href="aqunf-20201231.xsd#aqunf_DefinedBenefitPlanNonserviceCostsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_DefinedBenefitPlanNonserviceCostsAbstract" xlink:to="lab_aqunf_DefinedBenefitPlanNonserviceCostsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_RedeemableNoncontrollingInterestRelatedPartyCarryingAmount_1d87424c-91bb-4daa-8e2d-d5406d8c859e_terseLabel_en-US" xlink:label="lab_aqunf_RedeemableNoncontrollingInterestRelatedPartyCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redeemable non-controlling interest, held by related party (note 16(b))</link:label>
    <link:label id="lab_aqunf_RedeemableNoncontrollingInterestRelatedPartyCarryingAmount_label_en-US" xlink:label="lab_aqunf_RedeemableNoncontrollingInterestRelatedPartyCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redeemable Noncontrolling Interest, Related Party, Carrying Amount</link:label>
    <link:label id="lab_aqunf_RedeemableNoncontrollingInterestRelatedPartyCarryingAmount_documentation_en-US" xlink:label="lab_aqunf_RedeemableNoncontrollingInterestRelatedPartyCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redeemable Noncontrolling Interest, Related Party, Carrying Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_RedeemableNoncontrollingInterestRelatedPartyCarryingAmount" xlink:href="aqunf-20201231.xsd#aqunf_RedeemableNoncontrollingInterestRelatedPartyCarryingAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_RedeemableNoncontrollingInterestRelatedPartyCarryingAmount" xlink:to="lab_aqunf_RedeemableNoncontrollingInterestRelatedPartyCarryingAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions_65684005-dd5d-47dd-84e3-2ce48379e29a_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cost of equity funds used for construction purposes</link:label>
    <link:label id="lab_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions_label_en-US" xlink:label="lab_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Public Utilities, Allowance for Funds Used During Construction, Additions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions"/>
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    <link:label id="lab_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_label_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Income (Loss) Attributable to Redeemable Noncontrolling Interest</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentLineItems_00654d91-20b6-4c91-b9fb-42732da3ccb5_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment [Line Items]</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentLineItems_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_5686c2a4-994c-4da3-9e5a-09de09efc173_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment, Type [Domain]</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-Lived Tangible Asset [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_dbcd30f6-fc10-43a3-96b5-e5761998a1c2_negatedLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Benefits paid</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid" xlink:to="lab_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfDefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock_36f84d63-d081-4a78-a848-ec0923a9c446_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amounts Recognized in Other Comprehensive Loss</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock"/>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentTextBlock_6cdc72d6-af1a-48b8-a939-11d456eefe7e_verboseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentTextBlock_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_CustomerRelationshipMember_887057a5-7915-4582-b7b6-226b4e614a8b_terseLabel_en-US" xlink:label="lab_aqunf_CustomerRelationshipMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer relationships</link:label>
    <link:label id="lab_aqunf_CustomerRelationshipMember_label_en-US" xlink:label="lab_aqunf_CustomerRelationshipMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer Relationship [Member]</link:label>
    <link:label id="lab_aqunf_CustomerRelationshipMember_documentation_en-US" xlink:label="lab_aqunf_CustomerRelationshipMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer Relationship [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_CustomerRelationshipMember" xlink:href="aqunf-20201231.xsd#aqunf_CustomerRelationshipMember"/>
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    <link:label id="lab_aqunf_OtherNetLossesMember_4e777e24-d407-432b-a290-c9e9b234d9da_terseLabel_en-US" xlink:label="lab_aqunf_OtherNetLossesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Net Losses</link:label>
    <link:label id="lab_aqunf_OtherNetLossesMember_label_en-US" xlink:label="lab_aqunf_OtherNetLossesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Net Losses [Member]</link:label>
    <link:label id="lab_aqunf_OtherNetLossesMember_documentation_en-US" xlink:label="lab_aqunf_OtherNetLossesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Net Losses [Member]</link:label>
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    <link:label id="lab_aqunf_SeniorUnsecuredNotesDueJanuary2029Member_12e3c55f-a8cf-4dff-96f0-892bcfc3a5b7_terseLabel_en-US" xlink:label="lab_aqunf_SeniorUnsecuredNotesDueJanuary2029Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Senior Unsecured Notes Due January 2029</link:label>
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    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_ef07c42c-bc1a-4e22-af04-21c2d8a2dd89_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Public offering and subscription receipts (in shares)</link:label>
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    <link:label id="lab_us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets_2e0ce7c6-0ea2-4302-8675-140826288774_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair value of plan assets</link:label>
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    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsGross_9d64a5b3-c46b-4c4d-9d23-e8f302e90f35_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsGross" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cost</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfCapitalizationTextBlock_e747e492-8a7a-4d3a-8ce0-241f3a957c0f_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfCapitalizationTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capitalization of Interest</link:label>
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    <link:label id="lab_aqunf_ProceedsfromIssuanceofCommonStockNetofStockIssuanceCosts_7d4b4a0b-6e3f-4a25-9204-e240597bdc9b_verboseLabel_en-US" xlink:label="lab_aqunf_ProceedsfromIssuanceofCommonStockNetofStockIssuanceCosts" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of common shares, net of costs</link:label>
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    <link:label id="lab_aqunf_ProceedsfromIssuanceofCommonStockNetofStockIssuanceCosts_documentation_en-US" xlink:label="lab_aqunf_ProceedsfromIssuanceofCommonStockNetofStockIssuanceCosts" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from Issuance of Common Stock, Net of Stock Issuance Costs</link:label>
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    <link:label id="lab_srt_OwnershipAxis_4034105b-b414-48c7-8908-6d5ba005d834_terseLabel_en-US" xlink:label="lab_srt_OwnershipAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ownership [Axis]</link:label>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_514188f2-511e-42ad-a82b-0e5c4e013a34_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Temporary Equity [Roll Forward]</link:label>
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    <link:label id="lab_aqunf_PropertyPlantAndEquipmentPurposeOfUseAxis_db0e6c01-6009-4749-a890-0f94ff7fe511_terseLabel_en-US" xlink:label="lab_aqunf_PropertyPlantAndEquipmentPurposeOfUseAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property Plant And Equipment Purpose Of Use [Axis]</link:label>
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    <link:label id="lab_us-gaap_ConsolidationVariableInterestEntityPolicy_d07e041c-2684-4f64-952b-c114ae4ad034_terseLabel_en-US" xlink:label="lab_us-gaap_ConsolidationVariableInterestEntityPolicy" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable interest entities</link:label>
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    <link:label id="lab_us-gaap_CashFlowHedgingMember_7baad64c-2f2b-4111-bb17-2363abb80c1f_terseLabel_en-US" xlink:label="lab_us-gaap_CashFlowHedgingMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flow hedge</link:label>
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    <link:label id="lab_us-gaap_AwardTypeAxis_de43fd24-94a2-4f20-84d3-d2e599c090c5_terseLabel_en-US" xlink:label="lab_us-gaap_AwardTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Award Type [Axis]</link:label>
    <link:label id="lab_us-gaap_AwardTypeAxis_label_en-US" xlink:label="lab_us-gaap_AwardTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Award Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
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    <link:label id="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate</link:label>
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    <link:label id="lab_us-gaap_CoVenturerMember_eaf1ecdf-8f48-41c4-9939-49b86b928aa9_terseLabel_en-US" xlink:label="lab_us-gaap_CoVenturerMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Third party</link:label>
    <link:label id="lab_us-gaap_CoVenturerMember_label_en-US" xlink:label="lab_us-gaap_CoVenturerMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Co-venturer [Member]</link:label>
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    <link:label id="lab_aqunf_CapitalizedOperatingAndMaintenanceCostsRecoveryRatePercent_cd326c61-8590-4779-aee2-dde30ecd022f_terseLabel_en-US" xlink:label="lab_aqunf_CapitalizedOperatingAndMaintenanceCostsRecoveryRatePercent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capitalized operating and maintenance costs, recovery rate, (percent)</link:label>
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    <link:label id="lab_aqunf_CapitalizedOperatingAndMaintenanceCostsRecoveryRatePercent_documentation_en-US" xlink:label="lab_aqunf_CapitalizedOperatingAndMaintenanceCostsRecoveryRatePercent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capitalized Operating and Maintenance Costs, Recovery Rate, Percent</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_CapitalizedOperatingAndMaintenanceCostsRecoveryRatePercent" xlink:to="lab_aqunf_CapitalizedOperatingAndMaintenanceCostsRecoveryRatePercent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_802e4f3c-b7fa-4aae-ab69-7b6430f1fbaa_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other assets</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets</link:label>
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    <link:label id="lab_aqunf_OtherNoncurrentObligations_0a649f1b-d4a6-4b46-98d6-3e6033aff781_terseLabel_en-US" xlink:label="lab_aqunf_OtherNoncurrentObligations" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other obligations</link:label>
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    <link:label id="lab_aqunf_OtherNoncurrentObligations_documentation_en-US" xlink:label="lab_aqunf_OtherNoncurrentObligations" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Noncurrent Obligations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_OtherNoncurrentObligations" xlink:href="aqunf-20201231.xsd#aqunf_OtherNoncurrentObligations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_OtherNoncurrentObligations" xlink:to="lab_aqunf_OtherNoncurrentObligations" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RestrictedCash_25931b91-9801-4b16-889b-7ffd3ec1bf77_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedCash" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restricted cash</link:label>
    <link:label id="lab_us-gaap_RestrictedCash_label_en-US" xlink:label="lab_us-gaap_RestrictedCash" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restricted Cash</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCash" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedCash"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestrictedCash" xlink:to="lab_us-gaap_RestrictedCash" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RetainedEarningsMember_8d4a9a20-e650-4b45-87d7-61120e5c9e6e_terseLabel_en-US" xlink:label="lab_us-gaap_RetainedEarningsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retained earnings (deficit)</link:label>
    <link:label id="lab_us-gaap_RetainedEarningsMember_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retained Earnings [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RetainedEarningsMember" xlink:to="lab_us-gaap_RetainedEarningsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_aqunf_CustomerDeposits_2fd32487-79ee-47e5-9131-24e88da29845_terseLabel_en-US" xlink:label="lab_aqunf_CustomerDeposits" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer deposits</link:label>
    <link:label id="lab_aqunf_CustomerDeposits_label_en-US" xlink:label="lab_aqunf_CustomerDeposits" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer Deposits</link:label>
    <link:label id="lab_aqunf_CustomerDeposits_documentation_en-US" xlink:label="lab_aqunf_CustomerDeposits" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer Deposits</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_aqunf_CustomerDeposits" xlink:href="aqunf-20201231.xsd#aqunf_CustomerDeposits"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_aqunf_CustomerDeposits" xlink:to="lab_aqunf_CustomerDeposits" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueByMeasurementBasisAxis_897dd44e-6578-482d-a403-595b2f9f5753_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementBasisAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Measurement Basis [Axis]</link:label>
    <link:label id="lab_us-gaap_FairValueByMeasurementBasisAxis_label_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementBasisAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Measurement Basis [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis" xlink:to="lab_us-gaap_FairValueByMeasurementBasisAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AssetRetirementObligationRevisionOfEstimate_226bce51-9160-4be2-bfa9-cca31c9e3464_terseLabel_en-US" xlink:label="lab_us-gaap_AssetRetirementObligationRevisionOfEstimate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in cash flow estimates</link:label>
    <link:label id="lab_us-gaap_AssetRetirementObligationRevisionOfEstimate_label_en-US" xlink:label="lab_us-gaap_AssetRetirementObligationRevisionOfEstimate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Retirement Obligation, Revision of Estimate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetRetirementObligationRevisionOfEstimate" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetRetirementObligationRevisionOfEstimate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetRetirementObligationRevisionOfEstimate" xlink:to="lab_us-gaap_AssetRetirementObligationRevisionOfEstimate" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShortTermDebtTypeDomain_f866b356-69c7-48e7-9235-521f5e948d19_terseLabel_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term Debt, Type [Domain]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain" xlink:to="lab_us-gaap_ShortTermDebtTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PublicUtilityPropertyPlantAndEquipmentLineItems_fc45cfc6-c797-439c-8b6c-427b8752d321_terseLabel_en-US" xlink:label="lab_us-gaap_PublicUtilityPropertyPlantAndEquipmentLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Public Utility, Property, Plant and Equipment [Line Items]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilityPropertyPlantAndEquipmentLineItems" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PublicUtilityPropertyPlantAndEquipmentLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PublicUtilityPropertyPlantAndEquipmentLineItems" xlink:to="lab_us-gaap_PublicUtilityPropertyPlantAndEquipmentLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_d5b08d27-52e5-4c63-880b-adc5961088bd_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Components of Net Benefit Costs For Pension Plans and OPEB Recorded as Part of Administrative Expenses</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock" xlink:to="lab_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SignificantAccountingPoliciesTextBlock_8fb4878b-9a8f-41ab-ba87-abf481136791_terseLabel_en-US" xlink:label="lab_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant accounting policies</link:label>
    <link:label id="lab_us-gaap_SignificantAccountingPoliciesTextBlock_label_en-US" xlink:label="lab_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant Accounting Policies [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SignificantAccountingPoliciesTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:to="lab_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:type="arc" order="1"/>
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