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    <link:label id="lab_us-gaap_CommonStockSharesOutstanding_94779830B70ED5F8A4A6DEB04F1AF9C2_label_en-US" xlink:label="lab_us-gaap_CommonStockSharesOutstanding_8F8F1CBEE5E653D890E52840FFDFFE19" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Shares, Outstanding</link:label>
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    <link:label id="lab_us-gaap_BalanceSheetLocationDomain_EB4C5C27D19320D8ACEAAE7DDFCACEB5_label_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationDomain_EB4C5C27D19320D8ACEAAE7DDFCACEB5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Balance Sheet Location [Domain]</link:label>
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    <link:label id="lab_nrg_RedeemablenoncontrollinginterestMember_0194D77EDB875EDD0B50AE7DDFCA0954_terseLabel_en-US" xlink:label="lab_nrg_RedeemablenoncontrollinginterestMember_0194D77EDB875EDD0B50AE7DDFCA0954" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Redeemable noncontrolling interest</link:label>
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    <link:loc xlink:href="nrg-20180630.xsd#nrg_RedeemableNoncontrollingInterestCashContributionsfromNoncontrollingInterestHolders" xlink:label="loc_nrg_RedeemableNoncontrollingInterestCashContributionsfromNoncontrollingInterestHolders_947FBF720E3899BC8DE6AE7DDFCB6545" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DesignatedAsHedgingInstrumentMember_FB59914B6D6301F34424933EEA299F37_verboseLabel_en-US" xlink:label="lab_us-gaap_DesignatedAsHedgingInstrumentMember_8ED3E703A396589288114592A10F2B91" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Designated as Hedging Instrument</link:label>
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    <link:label id="lab_us-gaap_NondesignatedMember_BCC8E2AA805B38211EBB933EEA292063_label_en-US" xlink:label="lab_us-gaap_NondesignatedMember_784A32CDC81E513986EED7F4AF4E21DF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Not Designated as Hedging Instrument [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NondesignatedMember" xlink:label="loc_us-gaap_NondesignatedMember_784A32CDC81E513986EED7F4AF4E21DF" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DerivativeInstrumentRiskAxis_8D24BB5D6F6EC38DCA64933EEA292815_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis_06CA5C56FE2F58378153D57790E4CC01" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instrument [Axis]</link:label>
    <link:label id="lab_us-gaap_DerivativeInstrumentRiskAxis_8D24BB5D6F6EC38DCA64933EEA292815_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis_06CA5C56FE2F58378153D57790E4CC01" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instrument [Axis]</link:label>
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    <link:label id="lab_us-gaap_DerivativeContractTypeDomain_CF822F7E00E6373F4163933EEA296E35_label_en-US" xlink:label="lab_us-gaap_DerivativeContractTypeDomain_7689D7060F715E9486880B2F610051E1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Contract [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_7689D7060F715E9486880B2F610051E1" xlink:type="locator" />
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    <link:label id="lab_nrg_InterestRateContractCurrentMember_1D6963D67034C9A3392E933EEA294F53_terseLabel_en-US" xlink:label="lab_nrg_InterestRateContractCurrentMember_6AF30CB9028C54C89B4A51B0EE941B58" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate contracts current</link:label>
    <link:label id="lab_nrg_InterestRateContractCurrentMember_1D6963D67034C9A3392E933EEA294F53_label_en-US" xlink:label="lab_nrg_InterestRateContractCurrentMember_6AF30CB9028C54C89B4A51B0EE941B58" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Contract Current [Member]</link:label>
    <link:label id="lab_nrg_InterestRateContractCurrentMember_1D6963D67034C9A3392E933EEA294F53_documentation_en-US" xlink:label="lab_nrg_InterestRateContractCurrentMember_6AF30CB9028C54C89B4A51B0EE941B58" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The current portion of a derivative instrument whose primary underlying risk is tied to the right to receive or pay a sum of money at a given interest rate.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_InterestRateContractCurrentMember" xlink:label="loc_nrg_InterestRateContractCurrentMember_6AF30CB9028C54C89B4A51B0EE941B58" xlink:type="locator" />
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    <link:label id="lab_nrg_InterestRateContractNonCurrentMember_6933E37F1A15AD291C96933EEA292BDA_terseLabel_en-US" xlink:label="lab_nrg_InterestRateContractNonCurrentMember_633EE74D1652552B9F3AC04B85EB71D6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate contracts long-term</link:label>
    <link:label id="lab_nrg_InterestRateContractNonCurrentMember_6933E37F1A15AD291C96933EEA292BDA_label_en-US" xlink:label="lab_nrg_InterestRateContractNonCurrentMember_633EE74D1652552B9F3AC04B85EB71D6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Contract Non Current [Member]</link:label>
    <link:label id="lab_nrg_InterestRateContractNonCurrentMember_6933E37F1A15AD291C96933EEA292BDA_documentation_en-US" xlink:label="lab_nrg_InterestRateContractNonCurrentMember_633EE74D1652552B9F3AC04B85EB71D6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The noncurrent portion of a derivative instrument whose primary underlying risk is tied to the right to receive or pay a sum of money at a given interest rate.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_InterestRateContractNonCurrentMember" xlink:label="loc_nrg_InterestRateContractNonCurrentMember_633EE74D1652552B9F3AC04B85EB71D6" xlink:type="locator" />
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    <link:label id="lab_nrg_CommodityContractCurrentMember_CC0F1AF152C59A6FFA60933EEA291369_terseLabel_en-US" xlink:label="lab_nrg_CommodityContractCurrentMember_8A6359A3EC9B5649AC0B80EB646BF9D6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commodity contracts current</link:label>
    <link:label id="lab_nrg_CommodityContractCurrentMember_CC0F1AF152C59A6FFA60933EEA291369_label_en-US" xlink:label="lab_nrg_CommodityContractCurrentMember_8A6359A3EC9B5649AC0B80EB646BF9D6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commodity Contract Current [Member]</link:label>
    <link:label id="lab_nrg_CommodityContractCurrentMember_CC0F1AF152C59A6FFA60933EEA291369_documentation_en-US" xlink:label="lab_nrg_CommodityContractCurrentMember_8A6359A3EC9B5649AC0B80EB646BF9D6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The current portion of a derivative instrument whose primary underlying risk is tied to commodity prices.</link:label>
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    <link:label id="lab_nrg_CommodityContractNonCurrentMember_456FA6A2E838300BD869933EEA29B9E9_terseLabel_en-US" xlink:label="lab_nrg_CommodityContractNonCurrentMember_4F5D81E94E9B589C87D53B3E1213A124" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commodity contracts long-term</link:label>
    <link:label id="lab_nrg_CommodityContractNonCurrentMember_456FA6A2E838300BD869933EEA29B9E9_label_en-US" xlink:label="lab_nrg_CommodityContractNonCurrentMember_4F5D81E94E9B589C87D53B3E1213A124" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commodity Contract Non Current [Member]</link:label>
    <link:label id="lab_nrg_CommodityContractNonCurrentMember_456FA6A2E838300BD869933EEA29B9E9_documentation_en-US" xlink:label="lab_nrg_CommodityContractNonCurrentMember_4F5D81E94E9B589C87D53B3E1213A124" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The noncurrent portion of a derivative instrument whose primary underlying risk is tied to commodity prices.</link:label>
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    <link:label id="lab_nrg_NuclearDecommissioningTrustFundDisclosureAbstract_E8C45B3C65C23B145D428A1C2CC8583B_label_en-US" xlink:label="lab_nrg_NuclearDecommissioningTrustFundDisclosureAbstract_11BC3505FEFA5BEB86A2190B90B39B2A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Nuclear Decommissioning Trust Fund Disclosure [Abstract]</link:label>
    <link:label id="lab_nrg_NuclearDecommissioningTrustFundDisclosureAbstract_E8C45B3C65C23B145D428A1C2CC8583B_documentation_en-US" xlink:label="lab_nrg_NuclearDecommissioningTrustFundDisclosureAbstract_11BC3505FEFA5BEB86A2190B90B39B2A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
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    <link:label id="lab_nrg_DecommissioningTrustAssetsTableTextBlock_012745D207AB9EAAF0638A1C2CC89460_terseLabel_en-US" xlink:label="lab_nrg_DecommissioningTrustAssetsTableTextBlock_A37F226799F35CEAA1BDB9B8A79D4187" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Summary of aggregate fair values and unrealized gains and losses (including other-than-temporary impairments) for the securities held in the nuclear decommissioning trust fund</link:label>
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    <link:label id="lab_nrg_CounterpartyRiskByInstitutionAxis_D7A4A6712648436B8703DF3E915CF9A3_label_en-US" xlink:label="lab_nrg_CounterpartyRiskByInstitutionAxis_679A78C2DB4852BAA6783DD770A595FF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Counterparty Risk by Institution [Axis]</link:label>
    <link:label id="lab_nrg_CounterpartyRiskByInstitutionAxis_D7A4A6712648436B8703DF3E915CF9A3_documentation_en-US" xlink:label="lab_nrg_CounterpartyRiskByInstitutionAxis_679A78C2DB4852BAA6783DD770A595FF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The counter party risk exposure by institutions involved.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_CounterpartyRiskByInstitutionAxis" xlink:label="loc_nrg_CounterpartyRiskByInstitutionAxis_679A78C2DB4852BAA6783DD770A595FF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_CounterpartyRiskByInstitutionAxis_679A78C2DB4852BAA6783DD770A595FF" xlink:to="lab_nrg_CounterpartyRiskByInstitutionAxis_679A78C2DB4852BAA6783DD770A595FF" xlink:type="arc" />
    <link:label id="lab_nrg_CounterpartyRiskByInstitutionDomain_96BAE2E802076D7AA2A8DF3E915CEA60_terseLabel_en-US" xlink:label="lab_nrg_CounterpartyRiskByInstitutionDomain_19BC245BB78657B2BF6857A0E7205BDE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Counterparty Risk by Institution [Domain]</link:label>
    <link:label id="lab_nrg_CounterpartyRiskByInstitutionDomain_96BAE2E802076D7AA2A8DF3E915CEA60_label_en-US" xlink:label="lab_nrg_CounterpartyRiskByInstitutionDomain_19BC245BB78657B2BF6857A0E7205BDE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Counterparty Risk by Institution [Domain]</link:label>
    <link:label id="lab_nrg_CounterpartyRiskByInstitutionDomain_96BAE2E802076D7AA2A8DF3E915CEA60_documentation_en-US" xlink:label="lab_nrg_CounterpartyRiskByInstitutionDomain_19BC245BB78657B2BF6857A0E7205BDE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the counter party risk exposure by institutions involved.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_CounterpartyRiskByInstitutionDomain" xlink:label="loc_nrg_CounterpartyRiskByInstitutionDomain_19BC245BB78657B2BF6857A0E7205BDE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_CounterpartyRiskByInstitutionDomain_19BC245BB78657B2BF6857A0E7205BDE" xlink:to="lab_nrg_CounterpartyRiskByInstitutionDomain_19BC245BB78657B2BF6857A0E7205BDE" xlink:type="arc" />
    <link:label id="lab_nrg_UtilitiesEnergyMerchantsMarketersAndOtherMember_8C1006F2EC6EF68DBD49DF3E915CEDCD_terseLabel_en-US" xlink:label="lab_nrg_UtilitiesEnergyMerchantsMarketersAndOtherMember_52F43ED85F9859819DF928AC67282CFF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Utilities, energy merchants, marketers and other</link:label>
    <link:label id="lab_nrg_UtilitiesEnergyMerchantsMarketersAndOtherMember_8C1006F2EC6EF68DBD49DF3E915CEDCD_label_en-US" xlink:label="lab_nrg_UtilitiesEnergyMerchantsMarketersAndOtherMember_52F43ED85F9859819DF928AC67282CFF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Utilities Energy Merchants Marketers And Other [Member]</link:label>
    <link:label id="lab_nrg_UtilitiesEnergyMerchantsMarketersAndOtherMember_8C1006F2EC6EF68DBD49DF3E915CEDCD_documentation_en-US" xlink:label="lab_nrg_UtilitiesEnergyMerchantsMarketersAndOtherMember_52F43ED85F9859819DF928AC67282CFF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the information pertaining to utilities, energy, merchants, marketers and other.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_UtilitiesEnergyMerchantsMarketersAndOtherMember" xlink:label="loc_nrg_UtilitiesEnergyMerchantsMarketersAndOtherMember_52F43ED85F9859819DF928AC67282CFF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_UtilitiesEnergyMerchantsMarketersAndOtherMember_52F43ED85F9859819DF928AC67282CFF" xlink:to="lab_nrg_UtilitiesEnergyMerchantsMarketersAndOtherMember_52F43ED85F9859819DF928AC67282CFF" xlink:type="arc" />
    <link:label id="lab_nrg_FinancialInstitutionsMember_0676A76397C934FDC2C1DF3E915C6E75_verboseLabel_en-US" xlink:label="lab_nrg_FinancialInstitutionsMember_2FABC89AF7EE595BBDB21E7E98681205" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Financial institutions</link:label>
    <link:label id="lab_nrg_FinancialInstitutionsMember_0676A76397C934FDC2C1DF3E915C6E75_label_en-US" xlink:label="lab_nrg_FinancialInstitutionsMember_2FABC89AF7EE595BBDB21E7E98681205" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Institutions [Member]</link:label>
    <link:label id="lab_nrg_FinancialInstitutionsMember_0676A76397C934FDC2C1DF3E915C6E75_documentation_en-US" xlink:label="lab_nrg_FinancialInstitutionsMember_2FABC89AF7EE595BBDB21E7E98681205" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the information pertaining to the financial institutions.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_FinancialInstitutionsMember" xlink:label="loc_nrg_FinancialInstitutionsMember_2FABC89AF7EE595BBDB21E7E98681205" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_FinancialInstitutionsMember_2FABC89AF7EE595BBDB21E7E98681205" xlink:to="lab_nrg_FinancialInstitutionsMember_2FABC89AF7EE595BBDB21E7E98681205" xlink:type="arc" />
    <link:label id="lab_nrg_CounterpartyRiskByInvestmentGradeAxis_70579AEEE23502B91F84DF3E915C4E50_terseLabel_en-US" xlink:label="lab_nrg_CounterpartyRiskByInvestmentGradeAxis_6C025986EAC45EB3B168DF1DB006749D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Counterparty Risk by Investment Grade [Axis]</link:label>
    <link:label id="lab_nrg_CounterpartyRiskByInvestmentGradeAxis_70579AEEE23502B91F84DF3E915C4E50_label_en-US" xlink:label="lab_nrg_CounterpartyRiskByInvestmentGradeAxis_6C025986EAC45EB3B168DF1DB006749D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Counterparty Risk by Investment Grade [Axis]</link:label>
    <link:label id="lab_nrg_CounterpartyRiskByInvestmentGradeAxis_70579AEEE23502B91F84DF3E915C4E50_documentation_en-US" xlink:label="lab_nrg_CounterpartyRiskByInvestmentGradeAxis_6C025986EAC45EB3B168DF1DB006749D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The counter party risk exposure by investment grades.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_CounterpartyRiskByInvestmentGradeAxis" xlink:label="loc_nrg_CounterpartyRiskByInvestmentGradeAxis_6C025986EAC45EB3B168DF1DB006749D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_CounterpartyRiskByInvestmentGradeAxis_6C025986EAC45EB3B168DF1DB006749D" xlink:to="lab_nrg_CounterpartyRiskByInvestmentGradeAxis_6C025986EAC45EB3B168DF1DB006749D" xlink:type="arc" />
    <link:label id="lab_nrg_CounterpartyRiskByInvestmentGradeDomain_688587B24202E228714EDF3E915C8E87_terseLabel_en-US" xlink:label="lab_nrg_CounterpartyRiskByInvestmentGradeDomain_75756822ADC15BD8B8EEA6567B139343" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Counterparty Risk by Investment Grade [Domain]</link:label>
    <link:label id="lab_nrg_CounterpartyRiskByInvestmentGradeDomain_688587B24202E228714EDF3E915C8E87_label_en-US" xlink:label="lab_nrg_CounterpartyRiskByInvestmentGradeDomain_75756822ADC15BD8B8EEA6567B139343" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Counterparty Risk by Investment Grade [Domain]</link:label>
    <link:label id="lab_nrg_CounterpartyRiskByInvestmentGradeDomain_688587B24202E228714EDF3E915C8E87_documentation_en-US" xlink:label="lab_nrg_CounterpartyRiskByInvestmentGradeDomain_75756822ADC15BD8B8EEA6567B139343" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the counter party risk exposure by investment grades.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_CounterpartyRiskByInvestmentGradeDomain" xlink:label="loc_nrg_CounterpartyRiskByInvestmentGradeDomain_75756822ADC15BD8B8EEA6567B139343" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_CounterpartyRiskByInvestmentGradeDomain_75756822ADC15BD8B8EEA6567B139343" xlink:to="lab_nrg_CounterpartyRiskByInvestmentGradeDomain_75756822ADC15BD8B8EEA6567B139343" xlink:type="arc" />
    <link:label id="lab_us-gaap_ExternalCreditRatingInvestmentGradeMember_A296C5AAB5E868A34831DF3E915C5493_terseLabel_en-US" xlink:label="lab_us-gaap_ExternalCreditRatingInvestmentGradeMember_DA763EED4F7C56E6BCFFA52F3BFBD3AE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment grade</link:label>
    <link:label id="lab_us-gaap_ExternalCreditRatingInvestmentGradeMember_A296C5AAB5E868A34831DF3E915C5493_label_en-US" xlink:label="lab_us-gaap_ExternalCreditRatingInvestmentGradeMember_DA763EED4F7C56E6BCFFA52F3BFBD3AE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">External Credit Rating, Investment Grade [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ExternalCreditRatingInvestmentGradeMember" xlink:label="loc_us-gaap_ExternalCreditRatingInvestmentGradeMember_DA763EED4F7C56E6BCFFA52F3BFBD3AE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ExternalCreditRatingInvestmentGradeMember_DA763EED4F7C56E6BCFFA52F3BFBD3AE" xlink:to="lab_us-gaap_ExternalCreditRatingInvestmentGradeMember_DA763EED4F7C56E6BCFFA52F3BFBD3AE" xlink:type="arc" />
    <link:label id="lab_nrg_ExternalCreditRatingNotRatedMember_BA027BE3A16CB12887E6DF3E915CEAF6_terseLabel_en-US" xlink:label="lab_nrg_ExternalCreditRatingNotRatedMember_6D19CAB9CA3650C697E5A85BC953ECC9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-Investment grade/Non-Rated</link:label>
    <link:label id="lab_nrg_ExternalCreditRatingNotRatedMember_BA027BE3A16CB12887E6DF3E915CEAF6_label_en-US" xlink:label="lab_nrg_ExternalCreditRatingNotRatedMember_6D19CAB9CA3650C697E5A85BC953ECC9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">External Credit Rating Not Rated [Member]</link:label>
    <link:label id="lab_nrg_ExternalCreditRatingNotRatedMember_BA027BE3A16CB12887E6DF3E915CEAF6_documentation_en-US" xlink:label="lab_nrg_ExternalCreditRatingNotRatedMember_6D19CAB9CA3650C697E5A85BC953ECC9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents underlying referenced credits or entities, with respect to guarantees, for which ratings are not available.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_ExternalCreditRatingNotRatedMember" xlink:label="loc_nrg_ExternalCreditRatingNotRatedMember_6D19CAB9CA3650C697E5A85BC953ECC9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_ExternalCreditRatingNotRatedMember_6D19CAB9CA3650C697E5A85BC953ECC9" xlink:to="lab_nrg_ExternalCreditRatingNotRatedMember_6D19CAB9CA3650C697E5A85BC953ECC9" xlink:type="arc" />
    <link:label id="lab_nrg_NrgYieldIncMember_E7A5E50BA03193530C07DF3E915DB723_verboseLabel_en-US" xlink:label="lab_nrg_NrgYieldIncMember_63689CCED38457DDA84E1ED613E5CA16" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">NRG Yield, Inc.</link:label>
    <link:label id="lab_nrg_NrgYieldIncMember_E7A5E50BA03193530C07DF3E915DB723_label_en-US" xlink:label="lab_nrg_NrgYieldIncMember_63689CCED38457DDA84E1ED613E5CA16" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NRG Yield, Inc. [Member]</link:label>
    <link:label id="lab_nrg_NrgYieldIncMember_E7A5E50BA03193530C07DF3E915DB723_documentation_en-US" xlink:label="lab_nrg_NrgYieldIncMember_63689CCED38457DDA84E1ED613E5CA16" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">NRG Yield, Inc. [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_NrgYieldIncMember" xlink:label="loc_nrg_NrgYieldIncMember_63689CCED38457DDA84E1ED613E5CA16" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_NrgYieldIncMember_63689CCED38457DDA84E1ED613E5CA16" xlink:to="lab_nrg_NrgYieldIncMember_63689CCED38457DDA84E1ED613E5CA16" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems_751E3FF1BE6D74169A71DF3E915DD88A_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems_2AEA684050125737A84025E93E7173FD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Concentration of Credit Risk</link:label>
    <link:label id="lab_us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems_751E3FF1BE6D74169A71DF3E915DD88A_label_en-US" xlink:label="lab_us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems_2AEA684050125737A84025E93E7173FD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems" xlink:label="loc_us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems_2AEA684050125737A84025E93E7173FD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems_2AEA684050125737A84025E93E7173FD" xlink:to="lab_us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems_2AEA684050125737A84025E93E7173FD" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure_5B627F94CD801A53E180DF3E915D847F_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure_9461CC9DA7B054109A0B724E8CD061AC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Counterparty credit exposure to a portion of the Company's counterparties</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure_5B627F94CD801A53E180DF3E915D847F_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure_9461CC9DA7B054109A0B724E8CD061AC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure" xlink:label="loc_us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure_9461CC9DA7B054109A0B724E8CD061AC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure_9461CC9DA7B054109A0B724E8CD061AC" xlink:to="lab_us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure_9461CC9DA7B054109A0B724E8CD061AC" xlink:type="arc" />
    <link:label id="lab_nrg_NetCreditExposure_08ACA9D2B82F0904CB80DF3E915D64B8_terseLabel_en-US" xlink:label="lab_nrg_NetCreditExposure_6B92EC147DF55AACAF8974D0702632A8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net counterparty credit exposure to a portion of the Company's counterparties</link:label>
    <link:label id="lab_nrg_NetCreditExposure_08ACA9D2B82F0904CB80DF3E915D64B8_label_en-US" xlink:label="lab_nrg_NetCreditExposure_6B92EC147DF55AACAF8974D0702632A8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Credit Exposure</link:label>
    <link:label id="lab_nrg_NetCreditExposure_08ACA9D2B82F0904CB80DF3E915D64B8_documentation_en-US" xlink:label="lab_nrg_NetCreditExposure_6B92EC147DF55AACAF8974D0702632A8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the net exposure of the entity determined as total credit exposure to all counterparties less collateral (cash and letters of credit) held against those positions as of the reporting date.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_NetCreditExposure" xlink:label="loc_nrg_NetCreditExposure_6B92EC147DF55AACAF8974D0702632A8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_NetCreditExposure_6B92EC147DF55AACAF8974D0702632A8" xlink:to="lab_nrg_NetCreditExposure_6B92EC147DF55AACAF8974D0702632A8" xlink:type="arc" />
    <link:label id="lab_nrg_CollateralHeldCashAndLettersOfCredit_9558E9348F553EA03DADDF3E915D7A46_terseLabel_en-US" xlink:label="lab_nrg_CollateralHeldCashAndLettersOfCredit_D0782B1878555BE3BEC8F8151A6DA9B9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Collateral held (cash and letters of credit) against counterparty credit exposure to a portion of the Company's counterparties</link:label>
    <link:label id="lab_nrg_CollateralHeldCashAndLettersOfCredit_9558E9348F553EA03DADDF3E915D7A46_label_en-US" xlink:label="lab_nrg_CollateralHeldCashAndLettersOfCredit_D0782B1878555BE3BEC8F8151A6DA9B9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Collateral Held Cash and Letters of Credit</link:label>
    <link:label id="lab_nrg_CollateralHeldCashAndLettersOfCredit_9558E9348F553EA03DADDF3E915D7A46_documentation_en-US" xlink:label="lab_nrg_CollateralHeldCashAndLettersOfCredit_D0782B1878555BE3BEC8F8151A6DA9B9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Carrying amount as of the balance sheet date of cash collateral and letters of credit received by the entity on deposit from third parties in support of energy risk management.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_CollateralHeldCashAndLettersOfCredit" xlink:label="loc_nrg_CollateralHeldCashAndLettersOfCredit_D0782B1878555BE3BEC8F8151A6DA9B9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_CollateralHeldCashAndLettersOfCredit_D0782B1878555BE3BEC8F8151A6DA9B9" xlink:to="lab_nrg_CollateralHeldCashAndLettersOfCredit_D0782B1878555BE3BEC8F8151A6DA9B9" xlink:type="arc" />
    <link:label id="lab_nrg_CounterpartyCreditRiskExposurePercentageOfCreditRiskRollOff_71CD44A96DEDEC783F08DF3E915DA886_terseLabel_en-US" xlink:label="lab_nrg_CounterpartyCreditRiskExposurePercentageOfCreditRiskRollOff_1737C45547D450E1BBFD46C31D005501" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Company's exposure before collateral is expected to roll off by the end of 2019 (as a percent)</link:label>
    <link:label id="lab_nrg_CounterpartyCreditRiskExposurePercentageOfCreditRiskRollOff_71CD44A96DEDEC783F08DF3E915DA886_label_en-US" xlink:label="lab_nrg_CounterpartyCreditRiskExposurePercentageOfCreditRiskRollOff_1737C45547D450E1BBFD46C31D005501" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Counterparty Credit Risk Exposure Percentage Of Credit Risk Roll Off</link:label>
    <link:label id="lab_nrg_CounterpartyCreditRiskExposurePercentageOfCreditRiskRollOff_71CD44A96DEDEC783F08DF3E915DA886_documentation_en-US" xlink:label="lab_nrg_CounterpartyCreditRiskExposurePercentageOfCreditRiskRollOff_1737C45547D450E1BBFD46C31D005501" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The percentage of net counterparty credit exposure that rolls-off by the end of 2012.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_CounterpartyCreditRiskExposurePercentageOfCreditRiskRollOff" xlink:label="loc_nrg_CounterpartyCreditRiskExposurePercentageOfCreditRiskRollOff_1737C45547D450E1BBFD46C31D005501" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_CounterpartyCreditRiskExposurePercentageOfCreditRiskRollOff_1737C45547D450E1BBFD46C31D005501" xlink:to="lab_nrg_CounterpartyCreditRiskExposurePercentageOfCreditRiskRollOff_1737C45547D450E1BBFD46C31D005501" xlink:type="arc" />
    <link:label id="lab_nrg_CreditDerivativeMaximumNetExposurePercentage_CC466702C35118B83386DF3E915DB61B_terseLabel_en-US" xlink:label="lab_nrg_CreditDerivativeMaximumNetExposurePercentage_286C28D884D9510A9ECE59C79F853F17" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net exposure (as a percent)</link:label>
    <link:label id="lab_nrg_CreditDerivativeMaximumNetExposurePercentage_CC466702C35118B83386DF3E915DB61B_label_en-US" xlink:label="lab_nrg_CreditDerivativeMaximumNetExposurePercentage_286C28D884D9510A9ECE59C79F853F17" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Credit Derivative, Maximum Net Exposure, Percentage</link:label>
    <link:label id="lab_nrg_CreditDerivativeMaximumNetExposurePercentage_CC466702C35118B83386DF3E915DB61B_documentation_en-US" xlink:label="lab_nrg_CreditDerivativeMaximumNetExposurePercentage_286C28D884D9510A9ECE59C79F853F17" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the percentage of net counterparty credit exposure of the entity.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_CreditDerivativeMaximumNetExposurePercentage" xlink:label="loc_nrg_CreditDerivativeMaximumNetExposurePercentage_286C28D884D9510A9ECE59C79F853F17" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_CreditDerivativeMaximumNetExposurePercentage_286C28D884D9510A9ECE59C79F853F17" xlink:to="lab_nrg_CreditDerivativeMaximumNetExposurePercentage_286C28D884D9510A9ECE59C79F853F17" xlink:type="arc" />
    <link:label id="lab_nrg_CounterpartyCreditRiskExposurePercentageThreshold_1874450A408D3B276925DF3E915DA587_terseLabel_en-US" xlink:label="lab_nrg_CounterpartyCreditRiskExposurePercentageThreshold_88F3FBCB2A8957B8B38217683FD69A4B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Counterparty credit risk exposure to certain counterparties, threshold (as a percent)</link:label>
    <link:label id="lab_nrg_CounterpartyCreditRiskExposurePercentageThreshold_1874450A408D3B276925DF3E915DA587_label_en-US" xlink:label="lab_nrg_CounterpartyCreditRiskExposurePercentageThreshold_88F3FBCB2A8957B8B38217683FD69A4B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Counterparty Credit Risk Exposure, Percentage Threshold</link:label>
    <link:label id="lab_nrg_CounterpartyCreditRiskExposurePercentageThreshold_1874450A408D3B276925DF3E915DA587_documentation_en-US" xlink:label="lab_nrg_CounterpartyCreditRiskExposurePercentageThreshold_88F3FBCB2A8957B8B38217683FD69A4B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the threshold percentage for disclosure of counterparty credit exposure.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_CounterpartyCreditRiskExposurePercentageThreshold" xlink:label="loc_nrg_CounterpartyCreditRiskExposurePercentageThreshold_88F3FBCB2A8957B8B38217683FD69A4B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_CounterpartyCreditRiskExposurePercentageThreshold_88F3FBCB2A8957B8B38217683FD69A4B" xlink:to="lab_nrg_CounterpartyCreditRiskExposurePercentageThreshold_88F3FBCB2A8957B8B38217683FD69A4B" xlink:type="arc" />
    <link:label id="lab_nrg_AmountOfNetCounterpartyCreditRiskExposureToCertainCounterparties_E0092E89E13375848FB6DF3E915D493C_terseLabel_en-US" xlink:label="lab_nrg_AmountOfNetCounterpartyCreditRiskExposureToCertainCounterparties_D56C1260E7525B95A034B18B252F2FC5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate counterparty credit risk exposure for counterparties representing exposure above threshold percentage</link:label>
    <link:label id="lab_nrg_AmountOfNetCounterpartyCreditRiskExposureToCertainCounterparties_E0092E89E13375848FB6DF3E915D493C_label_en-US" xlink:label="lab_nrg_AmountOfNetCounterpartyCreditRiskExposureToCertainCounterparties_D56C1260E7525B95A034B18B252F2FC5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amount of Net Counterparty Credit Risk Exposure to Certain Counterparties</link:label>
    <link:label id="lab_nrg_AmountOfNetCounterpartyCreditRiskExposureToCertainCounterparties_E0092E89E13375848FB6DF3E915D493C_documentation_en-US" xlink:label="lab_nrg_AmountOfNetCounterpartyCreditRiskExposureToCertainCounterparties_D56C1260E7525B95A034B18B252F2FC5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The aggregate amount of net counterparty credit risk exposure to certain counterparties representing more than 10% of total net counterparty exposure.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_AmountOfNetCounterpartyCreditRiskExposureToCertainCounterparties" xlink:label="loc_nrg_AmountOfNetCounterpartyCreditRiskExposureToCertainCounterparties_D56C1260E7525B95A034B18B252F2FC5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_AmountOfNetCounterpartyCreditRiskExposureToCertainCounterparties_D56C1260E7525B95A034B18B252F2FC5" xlink:to="lab_nrg_AmountOfNetCounterpartyCreditRiskExposureToCertainCounterparties_D56C1260E7525B95A034B18B252F2FC5" xlink:type="arc" />
    <link:label id="lab_nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterparties_890CC4B744D3AE7BDFC7DF3E915D4556_terseLabel_en-US" xlink:label="lab_nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterparties_73C37431F2BF5BB1B54C61BDDB22D42B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated counterparty credit risk exposure under certain long term agreements, including California tolling agreements, South Central load obligations and solar power purchase agreements for the next 5 years</link:label>
    <link:label id="lab_nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterparties_890CC4B744D3AE7BDFC7DF3E915D4556_label_en-US" xlink:label="lab_nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterparties_73C37431F2BF5BB1B54C61BDDB22D42B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Estimated Counterparty Credit Risk Exposure to Certain Counterparties</link:label>
    <link:label id="lab_nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterparties_890CC4B744D3AE7BDFC7DF3E915D4556_documentation_en-US" xlink:label="lab_nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterparties_73C37431F2BF5BB1B54C61BDDB22D42B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This element represents the estimated amount of the counterparty credit risk exposure.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterparties" xlink:label="loc_nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterparties_73C37431F2BF5BB1B54C61BDDB22D42B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterparties_73C37431F2BF5BB1B54C61BDDB22D42B" xlink:to="lab_nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterparties_73C37431F2BF5BB1B54C61BDDB22D42B" xlink:type="arc" />
    <link:label id="lab_nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterpartiesPeriod_E68351BA113E942CF5E8DF3E915DB2E5_terseLabel_en-US" xlink:label="lab_nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterpartiesPeriod_DE9790A1F3385E8CA69094DA24467D8E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Period of estimated counterparty credit risk exposure under certain long term agreements, including California tolling agreements, South Central load obligations and solar power purchase agreements (in years)</link:label>
    <link:label id="lab_nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterpartiesPeriod_E68351BA113E942CF5E8DF3E915DB2E5_label_en-US" xlink:label="lab_nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterpartiesPeriod_DE9790A1F3385E8CA69094DA24467D8E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Estimated Counterparty Credit Risk Exposure to Certain Counterparties, Period</link:label>
    <link:label id="lab_nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterpartiesPeriod_E68351BA113E942CF5E8DF3E915DB2E5_documentation_en-US" xlink:label="lab_nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterpartiesPeriod_DE9790A1F3385E8CA69094DA24467D8E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Estimated Counterparty Credit Risk Exposure to Certain Counterparties, Period</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterpartiesPeriod" xlink:label="loc_nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterpartiesPeriod_DE9790A1F3385E8CA69094DA24467D8E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterpartiesPeriod_DE9790A1F3385E8CA69094DA24467D8E" xlink:to="lab_nrg_EstimatedCounterpartyCreditRiskExposureToCertainCounterpartiesPeriod_DE9790A1F3385E8CA69094DA24467D8E" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_B104059E66CEB5646C8AF1E65823855A_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_B104059E66CEB5646C8AF1E65823855A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disposal Groups, Including Discontinued Operations [Table]</link:label>
    <link:label id="lab_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_B104059E66CEB5646C8AF1E65823855A_label_en-US" xlink:label="lab_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_B104059E66CEB5646C8AF1E65823855A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disposal Groups, Including Discontinued Operations [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_B104059E66CEB5646C8AF1E65823855A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_B104059E66CEB5646C8AF1E65823855A" xlink:to="lab_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_B104059E66CEB5646C8AF1E65823855A" xlink:type="arc" />
    <link:label id="lab_nrg_UPMCThermalProjectMember_B840890FF8EFC1350592F1E658231515_terseLabel_en-US" xlink:label="lab_nrg_UPMCThermalProjectMember_B840890FF8EFC1350592F1E658231515" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">UPMC Thermal Project</link:label>
    <link:label id="lab_nrg_UPMCThermalProjectMember_B840890FF8EFC1350592F1E658231515_label_en-US" xlink:label="lab_nrg_UPMCThermalProjectMember_B840890FF8EFC1350592F1E658231515" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">UPMC Thermal Project [Member]</link:label>
    <link:label id="lab_nrg_UPMCThermalProjectMember_B840890FF8EFC1350592F1E658231515_documentation_en-US" xlink:label="lab_nrg_UPMCThermalProjectMember_B840890FF8EFC1350592F1E658231515" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">UPMC Thermal Project [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_UPMCThermalProjectMember" xlink:label="loc_nrg_UPMCThermalProjectMember_B840890FF8EFC1350592F1E658231515" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_UPMCThermalProjectMember_B840890FF8EFC1350592F1E658231515" xlink:to="lab_nrg_UPMCThermalProjectMember_B840890FF8EFC1350592F1E658231515" xlink:type="arc" />
    <link:label id="lab_nrg_AguaCalienteSolarProjectMember_2C3425A0B714E266A7ADF1E65823196C_terseLabel_en-US" xlink:label="lab_nrg_AguaCalienteSolarProjectMember_2C3425A0B714E266A7ADF1E65823196C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Agua Caliente solar project</link:label>
    <link:label id="lab_nrg_AguaCalienteSolarProjectMember_2C3425A0B714E266A7ADF1E65823196C_label_en-US" xlink:label="lab_nrg_AguaCalienteSolarProjectMember_2C3425A0B714E266A7ADF1E65823196C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Agua Caliente Solar Project [Member]</link:label>
    <link:label id="lab_nrg_AguaCalienteSolarProjectMember_2C3425A0B714E266A7ADF1E65823196C_documentation_en-US" xlink:label="lab_nrg_AguaCalienteSolarProjectMember_2C3425A0B714E266A7ADF1E65823196C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Agua Caliente Solar Project [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_AguaCalienteSolarProjectMember" xlink:label="loc_nrg_AguaCalienteSolarProjectMember_2C3425A0B714E266A7ADF1E65823196C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_AguaCalienteSolarProjectMember_2C3425A0B714E266A7ADF1E65823196C" xlink:to="lab_nrg_AguaCalienteSolarProjectMember_2C3425A0B714E266A7ADF1E65823196C" xlink:type="arc" />
    <link:label id="lab_nrg_GeneratingFacilityAxis_57839644F9C2431290DBF1E65823D192_terseLabel_en-US" xlink:label="lab_nrg_GeneratingFacilityAxis_57839644F9C2431290DBF1E65823D192" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Generating Facility [Axis]</link:label>
    <link:label id="lab_nrg_GeneratingFacilityAxis_57839644F9C2431290DBF1E65823D192_label_en-US" xlink:label="lab_nrg_GeneratingFacilityAxis_57839644F9C2431290DBF1E65823D192" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Generating Facility [Axis]</link:label>
    <link:label id="lab_nrg_GeneratingFacilityAxis_57839644F9C2431290DBF1E65823D192_documentation_en-US" xlink:label="lab_nrg_GeneratingFacilityAxis_57839644F9C2431290DBF1E65823D192" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Generating facility by location.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_GeneratingFacilityAxis" xlink:label="loc_nrg_GeneratingFacilityAxis_57839644F9C2431290DBF1E65823D192" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_GeneratingFacilityAxis_57839644F9C2431290DBF1E65823D192" xlink:to="lab_nrg_GeneratingFacilityAxis_57839644F9C2431290DBF1E65823D192" xlink:type="arc" />
    <link:label id="lab_nrg_GeneratingFacilityDomain_227B08E86B4EA1BC9162F1E658238CC9_terseLabel_en-US" xlink:label="lab_nrg_GeneratingFacilityDomain_227B08E86B4EA1BC9162F1E658238CC9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Generating Facility [Domain]</link:label>
    <link:label id="lab_nrg_GeneratingFacilityDomain_227B08E86B4EA1BC9162F1E658238CC9_label_en-US" xlink:label="lab_nrg_GeneratingFacilityDomain_227B08E86B4EA1BC9162F1E658238CC9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Generating Facility [Domain]</link:label>
    <link:label id="lab_nrg_GeneratingFacilityDomain_227B08E86B4EA1BC9162F1E658238CC9_documentation_en-US" xlink:label="lab_nrg_GeneratingFacilityDomain_227B08E86B4EA1BC9162F1E658238CC9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Name of generating facility.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_GeneratingFacilityDomain" xlink:label="loc_nrg_GeneratingFacilityDomain_227B08E86B4EA1BC9162F1E658238CC9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_GeneratingFacilityDomain_227B08E86B4EA1BC9162F1E658238CC9" xlink:to="lab_nrg_GeneratingFacilityDomain_227B08E86B4EA1BC9162F1E658238CC9" xlink:type="arc" />
    <link:label id="lab_nrg_AguaCalienteMember_03D31E27149B9AF45953F1E658234198_terseLabel_en-US" xlink:label="lab_nrg_AguaCalienteMember_03D31E27149B9AF45953F1E658234198" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Agua Caliente</link:label>
    <link:label id="lab_nrg_AguaCalienteMember_03D31E27149B9AF45953F1E658234198_label_en-US" xlink:label="lab_nrg_AguaCalienteMember_03D31E27149B9AF45953F1E658234198" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Agua Caliente [Member]</link:label>
    <link:label id="lab_nrg_AguaCalienteMember_03D31E27149B9AF45953F1E658234198_documentation_en-US" xlink:label="lab_nrg_AguaCalienteMember_03D31E27149B9AF45953F1E658234198" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Agua Caliente [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_AguaCalienteMember" xlink:label="loc_nrg_AguaCalienteMember_03D31E27149B9AF45953F1E658234198" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_AguaCalienteMember_03D31E27149B9AF45953F1E658234198" xlink:to="lab_nrg_AguaCalienteMember_03D31E27149B9AF45953F1E658234198" xlink:type="arc" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations" xlink:label="loc_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_2C828F45F33DA73B31B0FBB558E1E071" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_0C47E4C55A081758576DFBB558E19440_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_0C47E4C55A081758576DFBB558E19440" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0C47E4C55A081758576DFBB558E19440" xlink:type="locator" />
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    <link:label id="lab_nrg_ProceedsFromRenewableEnergyGrants_84809695E303CF9946ACFBB558E9DAA5_terseLabel_en-US" xlink:label="lab_nrg_ProceedsFromRenewableEnergyGrants_84809695E303CF9946ACFBB558E9DAA5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from renewable energy grants and state rebates</link:label>
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    <link:label id="lab_nrg_ProceedsFromRenewableEnergyGrants_84809695E303CF9946ACFBB558E9DAA5_documentation_en-US" xlink:label="lab_nrg_ProceedsFromRenewableEnergyGrants_84809695E303CF9946ACFBB558E9DAA5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of cash received during the period for renewable energy grants related to capital projects.</link:label>
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    <link:label id="lab_nrg_IntercompanyDividendFromParentFinancingActivities_3F234BE02B5A8C953569FBB558EB111F_negatedTerseLabel_en-US" xlink:label="lab_nrg_IntercompanyDividendFromParentFinancingActivities_3F234BE02B5A8C953569FBB558EB111F" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Dividends from NRG Yield, Inc.</link:label>
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    <link:label id="lab_nrg_IntercompanyDividendFromParentFinancingActivities_3F234BE02B5A8C953569FBB558EB111F_documentation_en-US" xlink:label="lab_nrg_IntercompanyDividendFromParentFinancingActivities_3F234BE02B5A8C953569FBB558EB111F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Intercompany Dividend From Parent, Financing Activities</link:label>
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    <link:label id="lab_nrg_ProceedsFromPaymentsToIntercompanyLoans_D57CDF8BD7143A5BAA1DFBB558EBD34E_terseLabel_en-US" xlink:label="lab_nrg_ProceedsFromPaymentsToIntercompanyLoans_D57CDF8BD7143A5BAA1DFBB558EBD34E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Payment (for)/from intercompany loans</link:label>
    <link:label id="lab_nrg_ProceedsFromPaymentsToIntercompanyLoans_D57CDF8BD7143A5BAA1DFBB558EBD34E_label_en-US" xlink:label="lab_nrg_ProceedsFromPaymentsToIntercompanyLoans_D57CDF8BD7143A5BAA1DFBB558EBD34E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Payments to Intercompany Loans</link:label>
    <link:label id="lab_nrg_ProceedsFromPaymentsToIntercompanyLoans_D57CDF8BD7143A5BAA1DFBB558EBD34E_documentation_en-US" xlink:label="lab_nrg_ProceedsFromPaymentsToIntercompanyLoans_D57CDF8BD7143A5BAA1DFBB558EBD34E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The cash inflow or outflow associated with intercompany loans for related parties.</link:label>
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    <link:label id="lab_us-gaap_PaymentsToAcquireBusinessThreeNetOfCashAcquired_0AE1F1BBB5F372E9CD36FBB558EB6B89_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireBusinessThreeNetOfCashAcquired_0AE1F1BBB5F372E9CD36FBB558EB6B89" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Acquisition of Drop Down Assets, net of cash acquired</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireBusinessThreeNetOfCashAcquired_0AE1F1BBB5F372E9CD36FBB558EB6B89_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireBusinessThreeNetOfCashAcquired_0AE1F1BBB5F372E9CD36FBB558EB6B89" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Business Three, Net of Cash Acquired</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireBusinessThreeNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessThreeNetOfCashAcquired_0AE1F1BBB5F372E9CD36FBB558EB6B89" xlink:type="locator" />
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    <link:label id="lab_nrg_IntercompanyDividendProceedsFinancing_A8DC65946247C296B366FBB558EB8D59_terseLabel_en-US" xlink:label="lab_nrg_IntercompanyDividendProceedsFinancing_A8DC65946247C296B366FBB558EB8D59" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Intercompany dividends</link:label>
    <link:label id="lab_nrg_IntercompanyDividendProceedsFinancing_A8DC65946247C296B366FBB558EB8D59_label_en-US" xlink:label="lab_nrg_IntercompanyDividendProceedsFinancing_A8DC65946247C296B366FBB558EB8D59" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Intercompany Dividend Proceeds - Financing</link:label>
    <link:label id="lab_nrg_IntercompanyDividendProceedsFinancing_A8DC65946247C296B366FBB558EB8D59_documentation_en-US" xlink:label="lab_nrg_IntercompanyDividendProceedsFinancing_A8DC65946247C296B366FBB558EB8D59" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Intercompany Dividend Proceeds - Financing</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_IntercompanyDividendProceedsFinancing" xlink:label="loc_nrg_IntercompanyDividendProceedsFinancing_A8DC65946247C296B366FBB558EB8D59" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_8B685B31A77FF12C194CFBB558ECDEEA_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_8B685B31A77FF12C194CFBB558ECDEEA" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Payment of dividends to common and preferred stockholders</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock" xlink:label="loc_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_8B685B31A77FF12C194CFBB558ECDEEA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_8B685B31A77FF12C194CFBB558ECDEEA" xlink:to="lab_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_8B685B31A77FF12C194CFBB558ECDEEA" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock_7A5AE67BDADD732592C2FBB558EC5CCB_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock_7A5AE67BDADD732592C2FBB558EC5CCB" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Payment for treasury stock</link:label>
    <link:label id="lab_us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock_7A5AE67BDADD732592C2FBB558EC5CCB_label_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock_7A5AE67BDADD732592C2FBB558EC5CCB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for Repurchase of Preferred Stock and Preference Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock_7A5AE67BDADD732592C2FBB558EC5CCB" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsForProceedsFromHedgeFinancingActivities_4411B1FB5318D660A1C6FBB558EC0B01_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromHedgeFinancingActivities_4411B1FB5318D660A1C6FBB558EC0B01" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Net receipts from settlement of acquired derivatives that include financing elements</link:label>
    <link:label id="lab_us-gaap_PaymentsForProceedsFromHedgeFinancingActivities_4411B1FB5318D660A1C6FBB558EC0B01_label_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromHedgeFinancingActivities_4411B1FB5318D660A1C6FBB558EC0B01" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for (Proceeds from) Hedge, Financing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForProceedsFromHedgeFinancingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromHedgeFinancingActivities_4411B1FB5318D660A1C6FBB558EC0B01" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForProceedsFromHedgeFinancingActivities_4411B1FB5318D660A1C6FBB558EC0B01" xlink:to="lab_us-gaap_PaymentsForProceedsFromHedgeFinancingActivities_4411B1FB5318D660A1C6FBB558EC0B01" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_06F4CCAC1D05E89D020BFBB558ECC116_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_06F4CCAC1D05E89D020BFBB558ECC116" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from issuance of long-term debt</link:label>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_06F4CCAC1D05E89D020BFBB558ECC116_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_06F4CCAC1D05E89D020BFBB558ECC116" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Issuance of Long-term Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_06F4CCAC1D05E89D020BFBB558ECC116" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ProceedsFromRepaymentsOfDebt_8BEA2FFB8BFF329E6414FBB558ED7891_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromRepaymentsOfDebt_8BEA2FFB8BFF329E6414FBB558ED7891" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Payments for short and long-term debt</link:label>
    <link:label id="lab_us-gaap_ProceedsFromRepaymentsOfDebt_8BEA2FFB8BFF329E6414FBB558ED7891_label_en-US" xlink:label="lab_us-gaap_ProceedsFromRepaymentsOfDebt_8BEA2FFB8BFF329E6414FBB558ED7891" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from (Repayments of) Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfDebt" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfDebt_8BEA2FFB8BFF329E6414FBB558ED7891" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseDueFromAffiliates_89038135C45DBA3D5ED1FBB558EDFD81_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseDueFromAffiliates_89038135C45DBA3D5ED1FBB558EDFD81" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Increase in notes receivable from affiliate</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseDueFromAffiliates" xlink:label="loc_us-gaap_IncreaseDecreaseDueFromAffiliates_89038135C45DBA3D5ED1FBB558EDFD81" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ProceedsFromPaymentsToMinorityShareholders_D8C2221CD2A6BD93C212FBB558EE9EAB_verboseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromPaymentsToMinorityShareholders_D8C2221CD2A6BD93C212FBB558EE9EAB" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Distributions to, net of contributions from, noncontrolling interests in subsidiaries</link:label>
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    <link:label id="lab_us-gaap_PaymentsOfDebtIssuanceCosts_6BD43B92991176D189FCFBB558EE970C_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtIssuanceCosts_6BD43B92991176D189FCFBB558EE970C" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Payment of debt issuance costs</link:label>
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    <link:label id="lab_us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_B27744DC6503F1FE23B7FBB558EE0165_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_B27744DC6503F1FE23B7FBB558EE0165" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Other - contingent consideration</link:label>
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    <link:label id="lab_nrg_DerivativeUnrealizedGainsOnOpenPositionsRelatedToTradingActivityNet_83C0E1248676FA759356F76F7E52D92C_verboseLabel_en-US" xlink:label="lab_nrg_DerivativeUnrealizedGainsOnOpenPositionsRelatedToTradingActivityNet_83C0E1248676FA759356F76F7E52D92C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net unrealized gains on open positions related to trading activity</link:label>
    <link:label id="lab_nrg_DerivativeUnrealizedGainsOnOpenPositionsRelatedToTradingActivityNet_83C0E1248676FA759356F76F7E52D92C_label_en-US" xlink:label="lab_nrg_DerivativeUnrealizedGainsOnOpenPositionsRelatedToTradingActivityNet_83C0E1248676FA759356F76F7E52D92C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Unrealized Gains on Open Positions Related to Trading Activity, Net</link:label>
    <link:label id="lab_nrg_DerivativeUnrealizedGainsOnOpenPositionsRelatedToTradingActivityNet_83C0E1248676FA759356F76F7E52D92C_documentation_en-US" xlink:label="lab_nrg_DerivativeUnrealizedGainsOnOpenPositionsRelatedToTradingActivityNet_83C0E1248676FA759356F76F7E52D92C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This element represents the amount recorded in the entity's statement of operations for net unrealized gains (losses) on open positions related to trading activities.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_DerivativeUnrealizedGainsOnOpenPositionsRelatedToTradingActivityNet" xlink:label="loc_nrg_DerivativeUnrealizedGainsOnOpenPositionsRelatedToTradingActivityNet_83C0E1248676FA759356F76F7E52D92C" xlink:type="locator" />
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    <link:label id="lab_nrg_UnrealizedGainLossonDerivativesMarkToMarketTradingActivities_882F7DCC4EE8F8EAB945F76F7E52EFA3_totalLabel_en-US" xlink:label="lab_nrg_UnrealizedGainLossonDerivativesMarkToMarketTradingActivities_882F7DCC4EE8F8EAB945F76F7E52EFA3" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total unrealized mark-to-market gains/(losses) for trading activity</link:label>
    <link:label id="lab_nrg_UnrealizedGainLossonDerivativesMarkToMarketTradingActivities_882F7DCC4EE8F8EAB945F76F7E52EFA3_label_en-US" xlink:label="lab_nrg_UnrealizedGainLossonDerivativesMarkToMarketTradingActivities_882F7DCC4EE8F8EAB945F76F7E52EFA3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrealized Gain (Loss) on Derivatives, Mark To Market, Trading Activities</link:label>
    <link:label id="lab_nrg_UnrealizedGainLossonDerivativesMarkToMarketTradingActivities_882F7DCC4EE8F8EAB945F76F7E52EFA3_documentation_en-US" xlink:label="lab_nrg_UnrealizedGainLossonDerivativesMarkToMarketTradingActivities_882F7DCC4EE8F8EAB945F76F7E52EFA3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Unrealized Gain (Loss) on Derivatives, Mark To Market, Trading Activities</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_UnrealizedGainLossonDerivativesMarkToMarketTradingActivities" xlink:label="loc_nrg_UnrealizedGainLossonDerivativesMarkToMarketTradingActivities_882F7DCC4EE8F8EAB945F76F7E52EFA3" xlink:type="locator" />
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    <link:label id="lab_us-gaap_UnrealizedGainLossOnDerivatives_D17F37B1E5B5D1C2C177F76F7E52D80C_totalLabel_en-US" xlink:label="lab_us-gaap_UnrealizedGainLossOnDerivatives_D17F37B1E5B5D1C2C177F76F7E52D80C" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total unrealized (losses)/gains</link:label>
    <link:label id="lab_us-gaap_UnrealizedGainLossOnDerivatives_D17F37B1E5B5D1C2C177F76F7E52D80C_label_en-US" xlink:label="lab_us-gaap_UnrealizedGainLossOnDerivatives_D17F37B1E5B5D1C2C177F76F7E52D80C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrealized Gain (Loss) on Derivatives</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="loc_us-gaap_UnrealizedGainLossOnDerivatives_D17F37B1E5B5D1C2C177F76F7E52D80C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnrealizedGainLossOnDerivatives_D17F37B1E5B5D1C2C177F76F7E52D80C" xlink:to="lab_us-gaap_UnrealizedGainLossOnDerivatives_D17F37B1E5B5D1C2C177F76F7E52D80C" xlink:type="arc" />
    <link:label id="lab_nrg_CreditRiskRelatedContingentFeaturesAbstract_8B9349760093E70C771AF76F7E5386DA_terseLabel_en-US" xlink:label="lab_nrg_CreditRiskRelatedContingentFeaturesAbstract_8B9349760093E70C771AF76F7E5386DA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit Risk Related Contingent Features</link:label>
    <link:label id="lab_nrg_CreditRiskRelatedContingentFeaturesAbstract_8B9349760093E70C771AF76F7E5386DA_label_en-US" xlink:label="lab_nrg_CreditRiskRelatedContingentFeaturesAbstract_8B9349760093E70C771AF76F7E5386DA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Credit Risk Related Contingent Features [Abstract]</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_CreditRiskRelatedContingentFeaturesAbstract_8B9349760093E70C771AF76F7E5386DA" xlink:to="lab_nrg_CreditRiskRelatedContingentFeaturesAbstract_8B9349760093E70C771AF76F7E5386DA" xlink:type="arc" />
    <link:label id="lab_us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments_473DD512D6F976BE23C2F76F7E531D7D_terseLabel_en-US" xlink:label="lab_us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments_473DD512D6F976BE23C2F76F7E531D7D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrealized gain from open economic hedge positions</link:label>
    <link:label id="lab_us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments_473DD512D6F976BE23C2F76F7E531D7D_label_en-US" xlink:label="lab_us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments_473DD512D6F976BE23C2F76F7E531D7D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrealized Gain (Loss) on Cash Flow Hedging Instruments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments" xlink:label="loc_us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments_473DD512D6F976BE23C2F76F7E531D7D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments_473DD512D6F976BE23C2F76F7E531D7D" xlink:to="lab_us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments_473DD512D6F976BE23C2F76F7E531D7D" xlink:type="arc" />
    <link:label id="lab_us-gaap_CollateralAlreadyPostedAggregateFairValue_D0C03A11052082505D53F76F7E53669B_terseLabel_en-US" xlink:label="lab_us-gaap_CollateralAlreadyPostedAggregateFairValue_D0C03A11052082505D53F76F7E53669B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative net liability position, collateral required Contracts with Credit Rating Contingent Feature</link:label>
    <link:label id="lab_us-gaap_CollateralAlreadyPostedAggregateFairValue_D0C03A11052082505D53F76F7E53669B_label_en-US" xlink:label="lab_us-gaap_CollateralAlreadyPostedAggregateFairValue_D0C03A11052082505D53F76F7E53669B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Collateral Already Posted, Aggregate Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CollateralAlreadyPostedAggregateFairValue" xlink:label="loc_us-gaap_CollateralAlreadyPostedAggregateFairValue_D0C03A11052082505D53F76F7E53669B" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DerivativeNetLiabilityPositionAggregateFairValue_A608CBE9A8AA5AD63597F76F7E53934C_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeNetLiabilityPositionAggregateFairValue_A608CBE9A8AA5AD63597F76F7E53934C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Collateral due on net liability position that has not been called by a certain marginable agreement counterparty</link:label>
    <link:label id="lab_us-gaap_DerivativeNetLiabilityPositionAggregateFairValue_A608CBE9A8AA5AD63597F76F7E53934C_label_en-US" xlink:label="lab_us-gaap_DerivativeNetLiabilityPositionAggregateFairValue_A608CBE9A8AA5AD63597F76F7E53934C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Net Liability Position, Aggregate Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DerivativeNetLiabilityPositionAggregateFairValue" xlink:label="loc_us-gaap_DerivativeNetLiabilityPositionAggregateFairValue_A608CBE9A8AA5AD63597F76F7E53934C" xlink:type="locator" />
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    <link:label id="lab_nrg_DocumentAndEntityInformationAbstract_F7CBEC91542B3F1BB92E8692D6964285_label_en-US" xlink:label="lab_nrg_DocumentAndEntityInformationAbstract_A840E9B8A19A51EDA9C51DE8817ED762" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document And Entity Information [Abstract]</link:label>
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    <link:loc xlink:href="nrg-20180630.xsd#nrg_DocumentAndEntityInformationAbstract" xlink:label="loc_nrg_DocumentAndEntityInformationAbstract_A840E9B8A19A51EDA9C51DE8817ED762" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_DocumentAndEntityInformationAbstract_A840E9B8A19A51EDA9C51DE8817ED762" xlink:to="lab_nrg_DocumentAndEntityInformationAbstract_A840E9B8A19A51EDA9C51DE8817ED762" xlink:type="arc" />
    <link:label id="lab_dei_EntityRegistrantName_695D776F1D37094154A08692D696094B_terseLabel_en-US" xlink:label="lab_dei_EntityRegistrantName_7381B2F6B2FD514598BDAE7812892FC2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:label id="lab_dei_EntityRegistrantName_695D776F1D37094154A08692D696094B_label_en-US" xlink:label="lab_dei_EntityRegistrantName_7381B2F6B2FD514598BDAE7812892FC2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_7381B2F6B2FD514598BDAE7812892FC2" xlink:type="locator" />
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    <link:label id="lab_dei_EntityCentralIndexKey_33D04B29F46FAB51066F8692D697827A_terseLabel_en-US" xlink:label="lab_dei_EntityCentralIndexKey_C06B738548475D1CB9B45C88CFFBFB4D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:label id="lab_dei_EntityCentralIndexKey_33D04B29F46FAB51066F8692D697827A_label_en-US" xlink:label="lab_dei_EntityCentralIndexKey_C06B738548475D1CB9B45C88CFFBFB4D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_C06B738548475D1CB9B45C88CFFBFB4D" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_545CF97093FC41AC8F85E244418B1395" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ConstructionInProgressMember_033CEB359B8D33903CD9E244418B0121_terseLabel_en-US" xlink:label="lab_us-gaap_ConstructionInProgressMember_033CEB359B8D33903CD9E244418B0121" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Construction in Progress</link:label>
    <link:label id="lab_us-gaap_ConstructionInProgressMember_033CEB359B8D33903CD9E244418B0121_label_en-US" xlink:label="lab_us-gaap_ConstructionInProgressMember_033CEB359B8D33903CD9E244418B0121" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Construction in Progress [Member]</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConstructionInProgressMember_033CEB359B8D33903CD9E244418B0121" xlink:to="lab_us-gaap_ConstructionInProgressMember_033CEB359B8D33903CD9E244418B0121" xlink:type="arc" />
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    <link:label id="lab_us-gaap_AffiliatedEntityMember_3260CF1E486C8D3CF005F81BE25B6089_verboseLabel_en-US" xlink:label="lab_us-gaap_AffiliatedEntityMember_3260CF1E486C8D3CF005F81BE25B6089" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">GenOn Entities</link:label>
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    <link:label id="lab_nrg_RevolvingCreditFacilityBorrowingsMember_1B8AA8DCFBB2179BD823F81BE25C2EAA_documentation_en-US" xlink:label="lab_nrg_RevolvingCreditFacilityBorrowingsMember_1B8AA8DCFBB2179BD823F81BE25C2EAA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Revolving Credit Facility Borrowings [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_RevolvingCreditFacilityBorrowingsMember" xlink:label="loc_nrg_RevolvingCreditFacilityBorrowingsMember_1B8AA8DCFBB2179BD823F81BE25C2EAA" xlink:type="locator" />
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    <link:loc xlink:href="nrg-20180630.xsd#nrg_AccruedInterestOnBorrowingsMember" xlink:label="loc_nrg_AccruedInterestOnBorrowingsMember_5733E7F9D164982E948DF81BE25C578C" xlink:type="locator" />
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    <link:label id="lab_nrg_AssignmentOfHistoricalClaimsAgainstREMAMember_9F92B2FEC8BBC8A355C3F81BE25CD765_terseLabel_en-US" xlink:label="lab_nrg_AssignmentOfHistoricalClaimsAgainstREMAMember_9F92B2FEC8BBC8A355C3F81BE25CD765" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assignment Of Historical Claims Against REMA</link:label>
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    <link:loc xlink:href="nrg-20180630.xsd#nrg_AssignmentOfHistoricalClaimsAgainstREMAMember" xlink:label="loc_nrg_AssignmentOfHistoricalClaimsAgainstREMAMember_9F92B2FEC8BBC8A355C3F81BE25CD765" xlink:type="locator" />
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    <link:loc xlink:href="nrg-20180630.xsd#nrg_IndemnificationOfPotentialClaimsByREMAMember" xlink:label="loc_nrg_IndemnificationOfPotentialClaimsByREMAMember_66E8BDBC98B1156A37D3F81BE25C7650" xlink:type="locator" />
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    <link:loc xlink:href="nrg-20180630.xsd#nrg_GenOnMember" xlink:label="loc_nrg_GenOnMember_764245A4FC4233A0FD3EF81BE25D4449" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LetterOfCreditMember_16102E601883BBB67A14F81BE25F67A0_terseLabel_en-US" xlink:label="lab_us-gaap_LetterOfCreditMember_16102E601883BBB67A14F81BE25F67A0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Letter of Credit</link:label>
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    <link:label id="lab_nrg_PaymentsToAffiliateSettlementAgreement_BF2432258C327759E0E5F81BE25FC849_terseLabel_en-US" xlink:label="lab_nrg_PaymentsToAffiliateSettlementAgreement_BF2432258C327759E0E5F81BE25FC849" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Payments to affiliate, settlement agreement</link:label>
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    <link:label id="lab_us-gaap_RestructuringAndRelatedCostExpectedCost1_5255F021CD93C0538A1DF81BE25FCB49_verboseLabel_en-US" xlink:label="lab_us-gaap_RestructuringAndRelatedCostExpectedCost1_5255F021CD93C0538A1DF81BE25FCB49" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Settlement consideration</link:label>
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    <link:label id="lab_us-gaap_PaymentsForAdvanceToAffiliate_E4A9865881A82C922FB3F81BE2600A25_terseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForAdvanceToAffiliate_E4A9865881A82C922FB3F81BE2600A25" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Payment to affiliate</link:label>
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    <link:label id="lab_us-gaap_DueFromRelatedParties_6811EB41264B94A8ACB3F81BE2609C19_terseLabel_en-US" xlink:label="lab_us-gaap_DueFromRelatedParties_6811EB41264B94A8ACB3F81BE2609C19" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Intercompany secured revolving credit facility and accrued interest and fees</link:label>
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    <link:label id="lab_us-gaap_LongTermDebtTextBlock_5205191D703765700D018A1C2C7A8CA7_label_en-US" xlink:label="lab_us-gaap_LongTermDebtTextBlock_1AD7E061B53D5EEB93004D6E1ABBD7C5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt [Text Block]</link:label>
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    <link:label id="lab_us-gaap_ScenarioPlanMember_CDA90E6BE3CB1B3E5B02F76F7DC0E70D_terseLabel_en-US" xlink:label="lab_us-gaap_ScenarioPlanMember_CDA90E6BE3CB1B3E5B02F76F7DC0E70D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Transformation Plan</link:label>
    <link:label id="lab_us-gaap_ScenarioPlanMember_CDA90E6BE3CB1B3E5B02F76F7DC0E70D_label_en-US" xlink:label="lab_us-gaap_ScenarioPlanMember_CDA90E6BE3CB1B3E5B02F76F7DC0E70D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Scenario, Plan [Member]</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScenarioPlanMember_CDA90E6BE3CB1B3E5B02F76F7DC0E70D" xlink:to="lab_us-gaap_ScenarioPlanMember_CDA90E6BE3CB1B3E5B02F76F7DC0E70D" xlink:type="arc" />
    <link:label id="lab_nrg_SeniorNotesdue2028Member_A6D7DFF9D3537CA0CEA5F76F7DC3E2F7_verboseLabel_en-US" xlink:label="lab_nrg_SeniorNotesdue2028Member_A6D7DFF9D3537CA0CEA5F76F7DC3E2F7" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">5.750% senior notes due 2028</link:label>
    <link:label id="lab_nrg_SeniorNotesdue2028Member_A6D7DFF9D3537CA0CEA5F76F7DC3E2F7_label_en-US" xlink:label="lab_nrg_SeniorNotesdue2028Member_A6D7DFF9D3537CA0CEA5F76F7DC3E2F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Senior Notes due 2028 [Member]</link:label>
    <link:label id="lab_nrg_SeniorNotesdue2028Member_A6D7DFF9D3537CA0CEA5F76F7DC3E2F7_documentation_en-US" xlink:label="lab_nrg_SeniorNotesdue2028Member_A6D7DFF9D3537CA0CEA5F76F7DC3E2F7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Senior Notes due 2028</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_SeniorNotesdue2028Member" xlink:label="loc_nrg_SeniorNotesdue2028Member_A6D7DFF9D3537CA0CEA5F76F7DC3E2F7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_SeniorNotesdue2028Member_A6D7DFF9D3537CA0CEA5F76F7DC3E2F7" xlink:to="lab_nrg_SeniorNotesdue2028Member_A6D7DFF9D3537CA0CEA5F76F7DC3E2F7" xlink:type="arc" />
    <link:label id="lab_nrg_SeniorNotesDueIn2022Member_7746E6D47D4F8AB7351AF76F7DC3ABEB_verboseLabel_en-US" xlink:label="lab_nrg_SeniorNotesDueIn2022Member_7746E6D47D4F8AB7351AF76F7DC3ABEB" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">6.250% senior notes due 2022</link:label>
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    <link:label id="lab_nrg_SeniorNotesDueIn2022Member_7746E6D47D4F8AB7351AF76F7DC3ABEB_documentation_en-US" xlink:label="lab_nrg_SeniorNotesDueIn2022Member_7746E6D47D4F8AB7351AF76F7DC3ABEB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents senior notes, which are due in 2022</link:label>
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    <link:label id="lab_nrg_SeniorNotesdue2027Member_C3DA0A9C248CDE9E7958F76F7DC3445D_verboseLabel_en-US" xlink:label="lab_nrg_SeniorNotesdue2027Member_C3DA0A9C248CDE9E7958F76F7DC3445D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">6.625% senior notes due 2027</link:label>
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    <link:label id="lab_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_0C9A8B650CC0411329D1F81BE2E92674_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_0C9A8B650CC0411329D1F81BE2E92674" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Distributions and equity in earnings of unconsolidated affiliates</link:label>
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    <link:label id="lab_us-gaap_DepreciationAmortizationAndAccretionNet_3A8AEDC72B9ED8B6B1D3F82C8BD2326A_terseLabel_en-US" xlink:label="lab_us-gaap_DepreciationAmortizationAndAccretionNet_3A8AEDC72B9ED8B6B1D3F82C8BD2326A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Depreciation, amortization and accretion</link:label>
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    <link:label id="lab_us-gaap_GainLossOnDispositionOfAssets1_56DF45D66558E927EE70F81BE2ECDBC6_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnDispositionOfAssets1_56DF45D66558E927EE70F81BE2ECDBC6" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Gain on sale of assets</link:label>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_17F7A199CF11AA7D02E0F81BE2ECF37A_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_17F7A199CF11AA7D02E0F81BE2ECF37A" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Changes in other working capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_17F7A199CF11AA7D02E0F81BE2ECF37A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_F215C87518F924E62D6EF81BE2ED8B16_terseLabel_en-US" xlink:label="lab_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_F215C87518F924E62D6EF81BE2ED8B16" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash used by discontinued operations</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations" xlink:label="loc_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_F215C87518F924E62D6EF81BE2ED8B16" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_F215C87518F924E62D6EF81BE2ED8B16" xlink:to="lab_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_F215C87518F924E62D6EF81BE2ED8B16" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInNotesReceivables_14D352E2C961E35F8714F81BE2EE87B3_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInNotesReceivables_14D352E2C961E35F8714F81BE2EE87B3" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Decrease in notes receivable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInNotesReceivables" xlink:label="loc_us-gaap_IncreaseDecreaseInNotesReceivables_14D352E2C961E35F8714F81BE2EE87B3" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsToAcquireIntangibleAssets_A6AB2AD33757B7AFB7A9F81BE2EE1A02_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireIntangibleAssets_A6AB2AD33757B7AFB7A9F81BE2EE1A02" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Purchases of emission allowances</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireIntangibleAssets" xlink:label="loc_us-gaap_PaymentsToAcquireIntangibleAssets_A6AB2AD33757B7AFB7A9F81BE2EE1A02" xlink:type="locator" />
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    <link:label id="lab_us-gaap_EquityMethodInvestmentOwnershipPercentage_FF56736F795F541976A0F1E65768E4C6_verboseLabel_en-US" xlink:label="lab_us-gaap_EquityMethodInvestmentOwnershipPercentage_FF56736F795F541976A0F1E65768E4C6" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Economic interest in equity method investments (as a percent)</link:label>
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    <link:label id="lab_nrg_NumberOfSolarElectricGeneratingProjects_4F505E5591DC5DD9CC48F20E69669C36_terseLabel_en-US" xlink:label="lab_nrg_NumberOfSolarElectricGeneratingProjects_4F505E5591DC5DD9CC48F20E69669C36" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of solar electric generating projects</link:label>
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    <link:label id="lab_nrg_NumberOfSolarElectricGeneratingProjects_4F505E5591DC5DD9CC48F20E69669C36_documentation_en-US" xlink:label="lab_nrg_NumberOfSolarElectricGeneratingProjects_4F505E5591DC5DD9CC48F20E69669C36" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number of Solar Electric Generating Projects</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_NumberOfSolarElectricGeneratingProjects" xlink:label="loc_nrg_NumberOfSolarElectricGeneratingProjects_4F505E5591DC5DD9CC48F20E69669C36" xlink:type="locator" />
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInRestrictedCash_5F26A80720C3137EBC4CF1E65768599A" xlink:to="lab_us-gaap_IncreaseDecreaseInRestrictedCash_5F26A80720C3137EBC4CF1E65768599A" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeconsolidationRevaluationOfRetainedInvestmentGainOrLossAmount_9BB72550B893E526066AF1E65768B8DE_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DeconsolidationRevaluationOfRetainedInvestmentGainOrLossAmount_9BB72550B893E526066AF1E65768B8DE" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Loss on deconsolidation and subsequent recognition</link:label>
    <link:label id="lab_us-gaap_DeconsolidationRevaluationOfRetainedInvestmentGainOrLossAmount_9BB72550B893E526066AF1E65768B8DE_label_en-US" xlink:label="lab_us-gaap_DeconsolidationRevaluationOfRetainedInvestmentGainOrLossAmount_9BB72550B893E526066AF1E65768B8DE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deconsolidation, Revaluation of Retained Investment, Gain (Loss), Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeconsolidationRevaluationOfRetainedInvestmentGainOrLossAmount" xlink:label="loc_us-gaap_DeconsolidationRevaluationOfRetainedInvestmentGainOrLossAmount_9BB72550B893E526066AF1E65768B8DE" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingAssets_DEEE43F1029A9641C410F1E6576813B9_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingAssets_DEEE43F1029A9641C410F1E6576813B9" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Deconsolidation reduced the Company's assets</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingAssets_DEEE43F1029A9641C410F1E6576813B9_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingAssets_DEEE43F1029A9641C410F1E6576813B9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Operating Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingAssets_DEEE43F1029A9641C410F1E6576813B9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingAssets_DEEE43F1029A9641C410F1E6576813B9" xlink:to="lab_us-gaap_IncreaseDecreaseInOperatingAssets_DEEE43F1029A9641C410F1E6576813B9" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingLiabilities_E47C46F3FE63877DEA53F1E65768D1ED_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingLiabilities_E47C46F3FE63877DEA53F1E65768D1ED" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Deconsolidation reduced the Company's liabilities</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingLiabilities_E47C46F3FE63877DEA53F1E65768D1ED" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingLiabilities_E47C46F3FE63877DEA53F1E65768D1ED" xlink:to="lab_us-gaap_IncreaseDecreaseInOperatingLiabilities_E47C46F3FE63877DEA53F1E65768D1ED" xlink:type="arc" />
    <link:label id="lab_nrg_DeficitRestorationObligation_03950FB175EF7C0F3419F1E657682F50_terseLabel_en-US" xlink:label="lab_nrg_DeficitRestorationObligation_03950FB175EF7C0F3419F1E657682F50" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deficit restoration obligation</link:label>
    <link:label id="lab_nrg_DeficitRestorationObligation_03950FB175EF7C0F3419F1E657682F50_label_en-US" xlink:label="lab_nrg_DeficitRestorationObligation_03950FB175EF7C0F3419F1E657682F50" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deficit Restoration Obligation</link:label>
    <link:label id="lab_nrg_DeficitRestorationObligation_03950FB175EF7C0F3419F1E657682F50_documentation_en-US" xlink:label="lab_nrg_DeficitRestorationObligation_03950FB175EF7C0F3419F1E657682F50" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Deficit Restoration Obligation</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_DeficitRestorationObligation_03950FB175EF7C0F3419F1E657682F50" xlink:to="lab_nrg_DeficitRestorationObligation_03950FB175EF7C0F3419F1E657682F50" xlink:type="arc" />
    <link:label id="lab_us-gaap_VariableInterestEntityConsolidatedAssetsCurrent_AFB1B9CE93D5C30717B8F1E65768E25A_terseLabel_en-US" xlink:label="lab_us-gaap_VariableInterestEntityConsolidatedAssetsCurrent_AFB1B9CE93D5C30717B8F1E65768E25A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current assets</link:label>
    <link:label id="lab_us-gaap_VariableInterestEntityConsolidatedAssetsCurrent_AFB1B9CE93D5C30717B8F1E65768E25A_label_en-US" xlink:label="lab_us-gaap_VariableInterestEntityConsolidatedAssetsCurrent_AFB1B9CE93D5C30717B8F1E65768E25A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Interest Entity, Consolidated, Assets, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableInterestEntityConsolidatedAssetsCurrent" xlink:label="loc_us-gaap_VariableInterestEntityConsolidatedAssetsCurrent_AFB1B9CE93D5C30717B8F1E65768E25A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableInterestEntityConsolidatedAssetsCurrent_AFB1B9CE93D5C30717B8F1E65768E25A" xlink:to="lab_us-gaap_VariableInterestEntityConsolidatedAssetsCurrent_AFB1B9CE93D5C30717B8F1E65768E25A" xlink:type="arc" />
    <link:label id="lab_nrg_VariableInterestEntityConsolidatedCarryingAmountNetPropertyPlantandEquipment_30F57B9C10873F21D8BDF1E65768871C_terseLabel_en-US" xlink:label="lab_nrg_VariableInterestEntityConsolidatedCarryingAmountNetPropertyPlantandEquipment_30F57B9C10873F21D8BDF1E65768871C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net property, plant and equipment</link:label>
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    <link:label id="lab_nrg_VariableInterestEntityConsolidatedCarryingAmountNetPropertyPlantandEquipment_30F57B9C10873F21D8BDF1E65768871C_documentation_en-US" xlink:label="lab_nrg_VariableInterestEntityConsolidatedCarryingAmountNetPropertyPlantandEquipment_30F57B9C10873F21D8BDF1E65768871C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Variable Interest Entity, Consolidated, Carrying Amount, Net Property Plant and Equipment</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_VariableInterestEntityConsolidatedCarryingAmountNetPropertyPlantandEquipment" xlink:label="loc_nrg_VariableInterestEntityConsolidatedCarryingAmountNetPropertyPlantandEquipment_30F57B9C10873F21D8BDF1E65768871C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_VariableInterestEntityConsolidatedCarryingAmountNetPropertyPlantandEquipment_30F57B9C10873F21D8BDF1E65768871C" xlink:to="lab_nrg_VariableInterestEntityConsolidatedCarryingAmountNetPropertyPlantandEquipment_30F57B9C10873F21D8BDF1E65768871C" xlink:type="arc" />
    <link:label id="lab_us-gaap_VariableInterestEntityConsolidatedAssetsNoncurrent_C08EBCB584D7CFC2AC4FF1E657685F3D_terseLabel_en-US" xlink:label="lab_us-gaap_VariableInterestEntityConsolidatedAssetsNoncurrent_C08EBCB584D7CFC2AC4FF1E657685F3D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other long-term assets</link:label>
    <link:label id="lab_us-gaap_VariableInterestEntityConsolidatedAssetsNoncurrent_C08EBCB584D7CFC2AC4FF1E657685F3D_label_en-US" xlink:label="lab_us-gaap_VariableInterestEntityConsolidatedAssetsNoncurrent_C08EBCB584D7CFC2AC4FF1E657685F3D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Interest Entity, Consolidated, Assets, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableInterestEntityConsolidatedAssetsNoncurrent" xlink:label="loc_us-gaap_VariableInterestEntityConsolidatedAssetsNoncurrent_C08EBCB584D7CFC2AC4FF1E657685F3D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableInterestEntityConsolidatedAssetsNoncurrent_C08EBCB584D7CFC2AC4FF1E657685F3D" xlink:to="lab_us-gaap_VariableInterestEntityConsolidatedAssetsNoncurrent_C08EBCB584D7CFC2AC4FF1E657685F3D" xlink:type="arc" />
    <link:label id="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets_51EFA5E6386CCCDD6738F1E657686547_totalLabel_en-US" xlink:label="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets_51EFA5E6386CCCDD6738F1E657686547" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total assets</link:label>
    <link:label id="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets_51EFA5E6386CCCDD6738F1E657686547_label_en-US" xlink:label="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets_51EFA5E6386CCCDD6738F1E657686547" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Interest Entity, Consolidated, Carrying Amount, Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets" xlink:label="loc_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets_51EFA5E6386CCCDD6738F1E657686547" xlink:type="locator" />
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    <link:label id="lab_us-gaap_VariableInterestEntityConsolidatedLiabilitiesCurrent_B3859EA151469338C342F1E657685200_label_en-US" xlink:label="lab_us-gaap_VariableInterestEntityConsolidatedLiabilitiesCurrent_B3859EA151469338C342F1E657685200" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Interest Entity, Consolidated, Liabilities, Current</link:label>
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    <link:label id="lab_nrg_VariableInterestEntityConsolidatedCarryingAmountLongtermDebt_AF17F0ADCB21EBD2E818F1E65768304C_terseLabel_en-US" xlink:label="lab_nrg_VariableInterestEntityConsolidatedCarryingAmountLongtermDebt_AF17F0ADCB21EBD2E818F1E65768304C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term debt</link:label>
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    <link:label id="lab_us-gaap_Assets_F07A883670B8A4DBAC63B2DED40BB170_totalLabel_en-US" xlink:label="lab_us-gaap_Assets_F07A883670B8A4DBAC63B2DED40BB170" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total Assets</link:label>
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    <link:label id="lab_nrg_SeniorUnsecuredNotes2017Member_99B0F3FB957A08366F8BFB05F91B6099_documentation_en-US" xlink:label="lab_nrg_SeniorUnsecuredNotes2017Member_99B0F3FB957A08366F8BFB05F91B6099" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">A debt obligation not collateralized by pledge, mortgage or other lien in the entity's assets. Senior note holders are paid off in full before any payments are made to junior note holders. These notes mature in 2017.</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnderlyingAssetClassAxis" xlink:label="loc_us-gaap_UnderlyingAssetClassAxis_4386C5B91D19ED2A8110AE7DDE5B4A10" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnderlyingAssetClassAxis_4386C5B91D19ED2A8110AE7DDE5B4A10" xlink:to="lab_us-gaap_UnderlyingAssetClassAxis_4386C5B91D19ED2A8110AE7DDE5B4A10" xlink:type="arc" />
    <link:label id="lab_nrg_EmissionsMember_43AD9DA7D589AEA8DFD4AE7DDE5BA62B_terseLabel_en-US" xlink:label="lab_nrg_EmissionsMember_43AD9DA7D589AEA8DFD4AE7DDE5BA62B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Emissions</link:label>
    <link:label id="lab_nrg_EmissionsMember_43AD9DA7D589AEA8DFD4AE7DDE5BA62B_label_en-US" xlink:label="lab_nrg_EmissionsMember_43AD9DA7D589AEA8DFD4AE7DDE5BA62B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Emissions [Member]</link:label>
    <link:label id="lab_nrg_EmissionsMember_43AD9DA7D589AEA8DFD4AE7DDE5BA62B_documentation_en-US" xlink:label="lab_nrg_EmissionsMember_43AD9DA7D589AEA8DFD4AE7DDE5BA62B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Details pertaining to the emission allowances, which is considered as a derivative commodity.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_EmissionsMember" xlink:label="loc_nrg_EmissionsMember_43AD9DA7D589AEA8DFD4AE7DDE5BA62B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_EmissionsMember_43AD9DA7D589AEA8DFD4AE7DDE5BA62B" xlink:to="lab_nrg_EmissionsMember_43AD9DA7D589AEA8DFD4AE7DDE5BA62B" xlink:type="arc" />
    <link:label id="lab_us-gaap_PublicUtilitiesInventoryCoalMember_0593390877F0A5A7C952AE7DDE5CF075_terseLabel_en-US" xlink:label="lab_us-gaap_PublicUtilitiesInventoryCoalMember_0593390877F0A5A7C952AE7DDE5CF075" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Coal</link:label>
    <link:label id="lab_us-gaap_PublicUtilitiesInventoryCoalMember_0593390877F0A5A7C952AE7DDE5CF075_label_en-US" xlink:label="lab_us-gaap_PublicUtilitiesInventoryCoalMember_0593390877F0A5A7C952AE7DDE5CF075" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Coal [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PublicUtilitiesInventoryCoalMember" xlink:label="loc_us-gaap_PublicUtilitiesInventoryCoalMember_0593390877F0A5A7C952AE7DDE5CF075" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PublicUtilitiesInventoryCoalMember_0593390877F0A5A7C952AE7DDE5CF075" xlink:to="lab_us-gaap_PublicUtilitiesInventoryCoalMember_0593390877F0A5A7C952AE7DDE5CF075" xlink:type="arc" />
    <link:label id="lab_nrg_NaturalGasMember_38F482694CB32C19811AAE7DDE5C8486_terseLabel_en-US" xlink:label="lab_nrg_NaturalGasMember_38F482694CB32C19811AAE7DDE5C8486" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Natural Gas</link:label>
    <link:label id="lab_nrg_NaturalGasMember_38F482694CB32C19811AAE7DDE5C8486_label_en-US" xlink:label="lab_nrg_NaturalGasMember_38F482694CB32C19811AAE7DDE5C8486" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Natural Gas [Member]</link:label>
    <link:label id="lab_nrg_NaturalGasMember_38F482694CB32C19811AAE7DDE5C8486_documentation_en-US" xlink:label="lab_nrg_NaturalGasMember_38F482694CB32C19811AAE7DDE5C8486" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Details pertaining to the natural gas, which is considered as a derivative commodity.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_NaturalGasMember" xlink:label="loc_nrg_NaturalGasMember_38F482694CB32C19811AAE7DDE5C8486" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_NaturalGasMember_38F482694CB32C19811AAE7DDE5C8486" xlink:to="lab_nrg_NaturalGasMember_38F482694CB32C19811AAE7DDE5C8486" xlink:type="arc" />
    <link:label id="lab_nrg_PowerMember_B47EF459FA94941C493EAE7DDE5C0685_terseLabel_en-US" xlink:label="lab_nrg_PowerMember_B47EF459FA94941C493EAE7DDE5C0685" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Power</link:label>
    <link:label id="lab_nrg_PowerMember_B47EF459FA94941C493EAE7DDE5C0685_label_en-US" xlink:label="lab_nrg_PowerMember_B47EF459FA94941C493EAE7DDE5C0685" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Power [Member]</link:label>
    <link:label id="lab_nrg_PowerMember_B47EF459FA94941C493EAE7DDE5C0685_documentation_en-US" xlink:label="lab_nrg_PowerMember_B47EF459FA94941C493EAE7DDE5C0685" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Details pertaining to the power, which is considered as a derivative commodity.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_PowerMember" xlink:label="loc_nrg_PowerMember_B47EF459FA94941C493EAE7DDE5C0685" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_PowerMember_B47EF459FA94941C493EAE7DDE5C0685" xlink:to="lab_nrg_PowerMember_B47EF459FA94941C493EAE7DDE5C0685" xlink:type="arc" />
    <link:label id="lab_us-gaap_CapacityMember_54B901C76EB9AA6E3EAAAE7DDE5C9D6B_terseLabel_en-US" xlink:label="lab_us-gaap_CapacityMember_54B901C76EB9AA6E3EAAAE7DDE5C9D6B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capacity</link:label>
    <link:label id="lab_us-gaap_CapacityMember_54B901C76EB9AA6E3EAAAE7DDE5C9D6B_label_en-US" xlink:label="lab_us-gaap_CapacityMember_54B901C76EB9AA6E3EAAAE7DDE5C9D6B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capacity [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapacityMember" xlink:label="loc_us-gaap_CapacityMember_54B901C76EB9AA6E3EAAAE7DDE5C9D6B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapacityMember_54B901C76EB9AA6E3EAAAE7DDE5C9D6B" xlink:to="lab_us-gaap_CapacityMember_54B901C76EB9AA6E3EAAAE7DDE5C9D6B" xlink:type="arc" />
    <link:label id="lab_nrg_InterestMember_27D4B9B790DA5D4FECC6AE7DDE5C2DA6_terseLabel_en-US" xlink:label="lab_nrg_InterestMember_27D4B9B790DA5D4FECC6AE7DDE5C2DA6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest</link:label>
    <link:label id="lab_nrg_InterestMember_27D4B9B790DA5D4FECC6AE7DDE5C2DA6_label_en-US" xlink:label="lab_nrg_InterestMember_27D4B9B790DA5D4FECC6AE7DDE5C2DA6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest [Member]</link:label>
    <link:label id="lab_nrg_InterestMember_27D4B9B790DA5D4FECC6AE7DDE5C2DA6_documentation_en-US" xlink:label="lab_nrg_InterestMember_27D4B9B790DA5D4FECC6AE7DDE5C2DA6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Details pertaining to interest rate swaps which are considered a derivative commodity.</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_InterestMember" xlink:label="loc_nrg_InterestMember_27D4B9B790DA5D4FECC6AE7DDE5C2DA6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_InterestMember_27D4B9B790DA5D4FECC6AE7DDE5C2DA6" xlink:to="lab_nrg_InterestMember_27D4B9B790DA5D4FECC6AE7DDE5C2DA6" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquityMember_DF69BEF591BDB65DDFC7AE7DDE5C4FF4_terseLabel_en-US" xlink:label="lab_us-gaap_EquityMember_DF69BEF591BDB65DDFC7AE7DDE5C4FF4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity</link:label>
    <link:label id="lab_us-gaap_EquityMember_DF69BEF591BDB65DDFC7AE7DDE5C4FF4_label_en-US" xlink:label="lab_us-gaap_EquityMember_DF69BEF591BDB65DDFC7AE7DDE5C4FF4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMember" xlink:label="loc_us-gaap_EquityMember_DF69BEF591BDB65DDFC7AE7DDE5C4FF4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityMember_DF69BEF591BDB65DDFC7AE7DDE5C4FF4" xlink:to="lab_us-gaap_EquityMember_DF69BEF591BDB65DDFC7AE7DDE5C4FF4" xlink:type="arc" />
    <link:label id="lab_nrg_VolumetricUnderlyingDerivativeTransactionsAbstract_FFCEC3AEFB77BABC3F7BAE7DDE5DF954_terseLabel_en-US" xlink:label="lab_nrg_VolumetricUnderlyingDerivativeTransactionsAbstract_FFCEC3AEFB77BABC3F7BAE7DDE5DF954" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Volumetric Underlying Derivative Transactions</link:label>
    <link:label id="lab_nrg_VolumetricUnderlyingDerivativeTransactionsAbstract_FFCEC3AEFB77BABC3F7BAE7DDE5DF954_label_en-US" xlink:label="lab_nrg_VolumetricUnderlyingDerivativeTransactionsAbstract_FFCEC3AEFB77BABC3F7BAE7DDE5DF954" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Volumetric Underlying Derivative Transactions [Abstract]</link:label>
    <link:label id="lab_nrg_VolumetricUnderlyingDerivativeTransactionsAbstract_FFCEC3AEFB77BABC3F7BAE7DDE5DF954_documentation_en-US" xlink:label="lab_nrg_VolumetricUnderlyingDerivativeTransactionsAbstract_FFCEC3AEFB77BABC3F7BAE7DDE5DF954" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Volumetric Underlying Derivative Transactions [Abstract]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_VolumetricUnderlyingDerivativeTransactionsAbstract" xlink:label="loc_nrg_VolumetricUnderlyingDerivativeTransactionsAbstract_FFCEC3AEFB77BABC3F7BAE7DDE5DF954" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_VolumetricUnderlyingDerivativeTransactionsAbstract_FFCEC3AEFB77BABC3F7BAE7DDE5DF954" xlink:to="lab_nrg_VolumetricUnderlyingDerivativeTransactionsAbstract_FFCEC3AEFB77BABC3F7BAE7DDE5DF954" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeNonmonetaryNotionalAmountMass_08F30718D1CADE32F8DDAE7DDE5D5AA5_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeNonmonetaryNotionalAmountMass_08F30718D1CADE32F8DDAE7DDE5D5AA5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative, nonmonetary notional amount, mass (ton)</link:label>
    <link:label id="lab_us-gaap_DerivativeNonmonetaryNotionalAmountMass_08F30718D1CADE32F8DDAE7DDE5D5AA5_label_en-US" xlink:label="lab_us-gaap_DerivativeNonmonetaryNotionalAmountMass_08F30718D1CADE32F8DDAE7DDE5D5AA5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Nonmonetary Notional Amount, Mass</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DerivativeNonmonetaryNotionalAmountMass" xlink:label="loc_us-gaap_DerivativeNonmonetaryNotionalAmountMass_08F30718D1CADE32F8DDAE7DDE5D5AA5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeNonmonetaryNotionalAmountMass_08F30718D1CADE32F8DDAE7DDE5D5AA5" xlink:to="lab_us-gaap_DerivativeNonmonetaryNotionalAmountMass_08F30718D1CADE32F8DDAE7DDE5D5AA5" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure_1C8E90B766CBEF3FB09FAE7DDE5ED247_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure_1C8E90B766CBEF3FB09FAE7DDE5ED247" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative, nonmonetary notional amount, energy (in MMBtu and MWh)</link:label>
    <link:label id="lab_us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure_1C8E90B766CBEF3FB09FAE7DDE5ED247_label_en-US" xlink:label="lab_us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure_1C8E90B766CBEF3FB09FAE7DDE5ED247" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Nonmonetary Notional Amount, Energy Measure</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure" xlink:label="loc_us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure_1C8E90B766CBEF3FB09FAE7DDE5ED247" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure_1C8E90B766CBEF3FB09FAE7DDE5ED247" xlink:to="lab_us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure_1C8E90B766CBEF3FB09FAE7DDE5ED247" xlink:type="arc" />
    <link:label id="lab_nrg_DerivativeNonmonetaryNotionalAmountEnergyFlowRate_CA2A81BECBBE249EAE46AE7DDE5E7AC7_negatedLabel_en-US" xlink:label="lab_nrg_DerivativeNonmonetaryNotionalAmountEnergyFlowRate_CA2A81BECBBE249EAE46AE7DDE5E7AC7" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Derivative, nonmonetary notional amount, flow rate (in MW/Day)</link:label>
    <link:label id="lab_nrg_DerivativeNonmonetaryNotionalAmountEnergyFlowRate_CA2A81BECBBE249EAE46AE7DDE5E7AC7_label_en-US" xlink:label="lab_nrg_DerivativeNonmonetaryNotionalAmountEnergyFlowRate_CA2A81BECBBE249EAE46AE7DDE5E7AC7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Nonmonetary Notional Amount, Energy Flow Rate</link:label>
    <link:label id="lab_nrg_DerivativeNonmonetaryNotionalAmountEnergyFlowRate_CA2A81BECBBE249EAE46AE7DDE5E7AC7_documentation_en-US" xlink:label="lab_nrg_DerivativeNonmonetaryNotionalAmountEnergyFlowRate_CA2A81BECBBE249EAE46AE7DDE5E7AC7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Derivative, Nonmonetary Notional Amount, Energy Flow Rate</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_DerivativeNonmonetaryNotionalAmountEnergyFlowRate" xlink:label="loc_nrg_DerivativeNonmonetaryNotionalAmountEnergyFlowRate_CA2A81BECBBE249EAE46AE7DDE5E7AC7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_DerivativeNonmonetaryNotionalAmountEnergyFlowRate_CA2A81BECBBE249EAE46AE7DDE5E7AC7" xlink:to="lab_nrg_DerivativeNonmonetaryNotionalAmountEnergyFlowRate_CA2A81BECBBE249EAE46AE7DDE5E7AC7" xlink:type="arc" />
    <link:label id="lab_invest_DerivativeNotionalAmount_6218B713554DD8BED982AE7DDE5E4D58_terseLabel_en-US" xlink:label="lab_invest_DerivativeNotionalAmount_6218B713554DD8BED982AE7DDE5E4D58" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative, notional amount (in usd)</link:label>
    <link:label id="lab_invest_DerivativeNotionalAmount_6218B713554DD8BED982AE7DDE5E4D58_label_en-US" xlink:label="lab_invest_DerivativeNotionalAmount_6218B713554DD8BED982AE7DDE5E4D58" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Notional Amount</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_DerivativeNotionalAmount" xlink:label="loc_invest_DerivativeNotionalAmount_6218B713554DD8BED982AE7DDE5E4D58" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_DerivativeNotionalAmount_6218B713554DD8BED982AE7DDE5E4D58" xlink:to="lab_invest_DerivativeNotionalAmount_6218B713554DD8BED982AE7DDE5E4D58" xlink:type="arc" />
    <link:label id="lab_nrg_DerivativeNonmonetaryNotionalAmountOther_732364E6738B21B3CAB1AE7DDE5EAA64_terseLabel_en-US" xlink:label="lab_nrg_DerivativeNonmonetaryNotionalAmountOther_732364E6738B21B3CAB1AE7DDE5EAA64" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative, non-monetary notional amount (in shares)</link:label>
    <link:label id="lab_nrg_DerivativeNonmonetaryNotionalAmountOther_732364E6738B21B3CAB1AE7DDE5EAA64_label_en-US" xlink:label="lab_nrg_DerivativeNonmonetaryNotionalAmountOther_732364E6738B21B3CAB1AE7DDE5EAA64" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Non-monetary Notional Amount, Other</link:label>
    <link:label id="lab_nrg_DerivativeNonmonetaryNotionalAmountOther_732364E6738B21B3CAB1AE7DDE5EAA64_documentation_en-US" xlink:label="lab_nrg_DerivativeNonmonetaryNotionalAmountOther_732364E6738B21B3CAB1AE7DDE5EAA64" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Derivative, Non-monetary Notional Amount, Other</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_DerivativeNonmonetaryNotionalAmountOther" xlink:label="loc_nrg_DerivativeNonmonetaryNotionalAmountOther_732364E6738B21B3CAB1AE7DDE5EAA64" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DisaggregationOfRevenueTable_E874E36380E520ACB463F15011F1D132_terseLabel_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTable_E874E36380E520ACB463F15011F1D132" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disaggregation of Revenue [Table]</link:label>
    <link:label id="lab_us-gaap_DisaggregationOfRevenueTable_E874E36380E520ACB463F15011F1D132_label_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTable_E874E36380E520ACB463F15011F1D132" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disaggregation of Revenue [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_E874E36380E520ACB463F15011F1D132" xlink:type="locator" />
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    <link:label id="lab_nrg_NRGYieldMember_2EDDCD52A079E4573200F15011F29D8B_terseLabel_en-US" xlink:label="lab_nrg_NRGYieldMember_2EDDCD52A079E4573200F15011F29D8B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NRG Yield</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_NRGYieldMember" xlink:label="loc_nrg_NRGYieldMember_2EDDCD52A079E4573200F15011F29D8B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_NRGYieldMember_2EDDCD52A079E4573200F15011F29D8B" xlink:to="lab_nrg_NRGYieldMember_2EDDCD52A079E4573200F15011F29D8B" xlink:type="arc" />
    <link:label id="lab_nrg_GulfCoastMember_377EBA3E7BC2D2C8B2D6F15011F38F12_terseLabel_en-US" xlink:label="lab_nrg_GulfCoastMember_377EBA3E7BC2D2C8B2D6F15011F38F12" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gulf Coast</link:label>
    <link:label id="lab_nrg_GulfCoastMember_377EBA3E7BC2D2C8B2D6F15011F38F12_label_en-US" xlink:label="lab_nrg_GulfCoastMember_377EBA3E7BC2D2C8B2D6F15011F38F12" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gulf Coast [Member]</link:label>
    <link:label id="lab_nrg_GulfCoastMember_377EBA3E7BC2D2C8B2D6F15011F38F12_documentation_en-US" xlink:label="lab_nrg_GulfCoastMember_377EBA3E7BC2D2C8B2D6F15011F38F12" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Gulf Coast [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_GulfCoastMember" xlink:label="loc_nrg_GulfCoastMember_377EBA3E7BC2D2C8B2D6F15011F38F12" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_GulfCoastMember_377EBA3E7BC2D2C8B2D6F15011F38F12" xlink:to="lab_nrg_GulfCoastMember_377EBA3E7BC2D2C8B2D6F15011F38F12" xlink:type="arc" />
    <link:label id="lab_nrg_EastAndWestMember_3CA8536E4D6D2C867F56F15011F3A1CF_terseLabel_en-US" xlink:label="lab_nrg_EastAndWestMember_3CA8536E4D6D2C867F56F15011F3A1CF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">East and West</link:label>
    <link:label id="lab_nrg_EastAndWestMember_3CA8536E4D6D2C867F56F15011F3A1CF_label_en-US" xlink:label="lab_nrg_EastAndWestMember_3CA8536E4D6D2C867F56F15011F3A1CF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">East And West [Member]</link:label>
    <link:label id="lab_nrg_EastAndWestMember_3CA8536E4D6D2C867F56F15011F3A1CF_documentation_en-US" xlink:label="lab_nrg_EastAndWestMember_3CA8536E4D6D2C867F56F15011F3A1CF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">East And West [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_EastAndWestMember" xlink:label="loc_nrg_EastAndWestMember_3CA8536E4D6D2C867F56F15011F3A1CF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_EastAndWestMember_3CA8536E4D6D2C867F56F15011F3A1CF" xlink:to="lab_nrg_EastAndWestMember_3CA8536E4D6D2C867F56F15011F3A1CF" xlink:type="arc" />
    <link:label id="lab_nrg_EnergyRevenueMember_133C4933280CB56EFE59F15011F47B48_terseLabel_en-US" xlink:label="lab_nrg_EnergyRevenueMember_133C4933280CB56EFE59F15011F47B48" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Energy revenue</link:label>
    <link:label id="lab_nrg_EnergyRevenueMember_133C4933280CB56EFE59F15011F47B48_label_en-US" xlink:label="lab_nrg_EnergyRevenueMember_133C4933280CB56EFE59F15011F47B48" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Energy Revenue [Member]</link:label>
    <link:label id="lab_nrg_EnergyRevenueMember_133C4933280CB56EFE59F15011F47B48_documentation_en-US" xlink:label="lab_nrg_EnergyRevenueMember_133C4933280CB56EFE59F15011F47B48" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Energy Revenue [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_EnergyRevenueMember" xlink:label="loc_nrg_EnergyRevenueMember_133C4933280CB56EFE59F15011F47B48" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_EnergyRevenueMember_133C4933280CB56EFE59F15011F47B48" xlink:to="lab_nrg_EnergyRevenueMember_133C4933280CB56EFE59F15011F47B48" xlink:type="arc" />
    <link:label id="lab_nrg_ProductsAndServicesRetailRevenueMember_B6021E9BAB8AB0D84AD6F15011F4D342_terseLabel_en-US" xlink:label="lab_nrg_ProductsAndServicesRetailRevenueMember_B6021E9BAB8AB0D84AD6F15011F4D342" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retail revenue</link:label>
    <link:label id="lab_nrg_ProductsAndServicesRetailRevenueMember_B6021E9BAB8AB0D84AD6F15011F4D342_label_en-US" xlink:label="lab_nrg_ProductsAndServicesRetailRevenueMember_B6021E9BAB8AB0D84AD6F15011F4D342" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Products And Services, Retail Revenue [Member]</link:label>
    <link:label id="lab_nrg_ProductsAndServicesRetailRevenueMember_B6021E9BAB8AB0D84AD6F15011F4D342_documentation_en-US" xlink:label="lab_nrg_ProductsAndServicesRetailRevenueMember_B6021E9BAB8AB0D84AD6F15011F4D342" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Products And Services, Retail [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_ProductsAndServicesRetailRevenueMember" xlink:label="loc_nrg_ProductsAndServicesRetailRevenueMember_B6021E9BAB8AB0D84AD6F15011F4D342" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_ProductsAndServicesRetailRevenueMember_B6021E9BAB8AB0D84AD6F15011F4D342" xlink:to="lab_nrg_ProductsAndServicesRetailRevenueMember_B6021E9BAB8AB0D84AD6F15011F4D342" xlink:type="arc" />
    <link:label id="lab_nrg_ProductsAndServicesTotalRetailMember_8DA64AFC41CC89928CD4F15011F480C5_terseLabel_en-US" xlink:label="lab_nrg_ProductsAndServicesTotalRetailMember_8DA64AFC41CC89928CD4F15011F480C5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total retail revenue</link:label>
    <link:label id="lab_nrg_ProductsAndServicesTotalRetailMember_8DA64AFC41CC89928CD4F15011F480C5_label_en-US" xlink:label="lab_nrg_ProductsAndServicesTotalRetailMember_8DA64AFC41CC89928CD4F15011F480C5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Products And Services, Total Retail [Member]</link:label>
    <link:label id="lab_nrg_ProductsAndServicesTotalRetailMember_8DA64AFC41CC89928CD4F15011F480C5_documentation_en-US" xlink:label="lab_nrg_ProductsAndServicesTotalRetailMember_8DA64AFC41CC89928CD4F15011F480C5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Products And Services, Total Retail [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_ProductsAndServicesTotalRetailMember" xlink:label="loc_nrg_ProductsAndServicesTotalRetailMember_8DA64AFC41CC89928CD4F15011F480C5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_ProductsAndServicesTotalRetailMember_8DA64AFC41CC89928CD4F15011F480C5" xlink:to="lab_nrg_ProductsAndServicesTotalRetailMember_8DA64AFC41CC89928CD4F15011F480C5" xlink:type="arc" />
    <link:label id="lab_nrg_ProductsAndServicesDerivativeRevenueMember_D327E7E2A7A6F5CC7383F15011F4192C_terseLabel_en-US" xlink:label="lab_nrg_ProductsAndServicesDerivativeRevenueMember_D327E7E2A7A6F5CC7383F15011F4192C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative revenue</link:label>
    <link:label id="lab_nrg_ProductsAndServicesDerivativeRevenueMember_D327E7E2A7A6F5CC7383F15011F4192C_label_en-US" xlink:label="lab_nrg_ProductsAndServicesDerivativeRevenueMember_D327E7E2A7A6F5CC7383F15011F4192C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Products And Services, Derivative Revenue [Member]</link:label>
    <link:label id="lab_nrg_ProductsAndServicesDerivativeRevenueMember_D327E7E2A7A6F5CC7383F15011F4192C_documentation_en-US" xlink:label="lab_nrg_ProductsAndServicesDerivativeRevenueMember_D327E7E2A7A6F5CC7383F15011F4192C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Products And Services, Derivative Revenue [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_ProductsAndServicesDerivativeRevenueMember" xlink:label="loc_nrg_ProductsAndServicesDerivativeRevenueMember_D327E7E2A7A6F5CC7383F15011F4192C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_ProductsAndServicesDerivativeRevenueMember_D327E7E2A7A6F5CC7383F15011F4192C" xlink:to="lab_nrg_ProductsAndServicesDerivativeRevenueMember_D327E7E2A7A6F5CC7383F15011F4192C" xlink:type="arc" />
    <link:label id="lab_nrg_ProductsAndServicesOtherMember_20701C52440C301D6102F15011F431A0_terseLabel_en-US" xlink:label="lab_nrg_ProductsAndServicesOtherMember_20701C52440C301D6102F15011F431A0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other revenue</link:label>
    <link:label id="lab_nrg_ProductsAndServicesOtherMember_20701C52440C301D6102F15011F431A0_label_en-US" xlink:label="lab_nrg_ProductsAndServicesOtherMember_20701C52440C301D6102F15011F431A0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Products And Services, Other [Member]</link:label>
    <link:label id="lab_nrg_ProductsAndServicesOtherMember_20701C52440C301D6102F15011F431A0_documentation_en-US" xlink:label="lab_nrg_ProductsAndServicesOtherMember_20701C52440C301D6102F15011F431A0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Products And Services, Other [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_ProductsAndServicesOtherMember" xlink:label="loc_nrg_ProductsAndServicesOtherMember_20701C52440C301D6102F15011F431A0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_ProductsAndServicesOtherMember_20701C52440C301D6102F15011F431A0" xlink:to="lab_nrg_ProductsAndServicesOtherMember_20701C52440C301D6102F15011F431A0" xlink:type="arc" />
    <link:label id="lab_nrg_OperatingRevenuesMember_890FD530ECC45F25E863F15011F5FB03_terseLabel_en-US" xlink:label="lab_nrg_OperatingRevenuesMember_890FD530ECC45F25E863F15011F5FB03" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total operating revenue</link:label>
    <link:label id="lab_nrg_OperatingRevenuesMember_890FD530ECC45F25E863F15011F5FB03_label_en-US" xlink:label="lab_nrg_OperatingRevenuesMember_890FD530ECC45F25E863F15011F5FB03" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Revenues [Member]</link:label>
    <link:label id="lab_nrg_OperatingRevenuesMember_890FD530ECC45F25E863F15011F5FB03_documentation_en-US" xlink:label="lab_nrg_OperatingRevenuesMember_890FD530ECC45F25E863F15011F5FB03" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Operating Revenues [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_OperatingRevenuesMember" xlink:label="loc_nrg_OperatingRevenuesMember_890FD530ECC45F25E863F15011F5FB03" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_OperatingRevenuesMember_890FD530ECC45F25E863F15011F5FB03" xlink:to="lab_nrg_OperatingRevenuesMember_890FD530ECC45F25E863F15011F5FB03" xlink:type="arc" />
    <link:label id="lab_nrg_ProductsAndServicesOtherDerivativeRevenueMember_EA1A0DA5BDCFB705BF42F15011F58523_terseLabel_en-US" xlink:label="lab_nrg_ProductsAndServicesOtherDerivativeRevenueMember_EA1A0DA5BDCFB705BF42F15011F58523" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other derivative revenue</link:label>
    <link:label id="lab_nrg_ProductsAndServicesOtherDerivativeRevenueMember_EA1A0DA5BDCFB705BF42F15011F58523_label_en-US" xlink:label="lab_nrg_ProductsAndServicesOtherDerivativeRevenueMember_EA1A0DA5BDCFB705BF42F15011F58523" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Products And Services, Other Derivative Revenue [Member]</link:label>
    <link:label id="lab_nrg_ProductsAndServicesOtherDerivativeRevenueMember_EA1A0DA5BDCFB705BF42F15011F58523_documentation_en-US" xlink:label="lab_nrg_ProductsAndServicesOtherDerivativeRevenueMember_EA1A0DA5BDCFB705BF42F15011F58523" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Products and Services, Other Derivative Revenue [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_ProductsAndServicesOtherDerivativeRevenueMember" xlink:label="loc_nrg_ProductsAndServicesOtherDerivativeRevenueMember_EA1A0DA5BDCFB705BF42F15011F58523" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_ProductsAndServicesOtherDerivativeRevenueMember_EA1A0DA5BDCFB705BF42F15011F58523" xlink:to="lab_nrg_ProductsAndServicesOtherDerivativeRevenueMember_EA1A0DA5BDCFB705BF42F15011F58523" xlink:type="arc" />
    <link:label id="lab_us-gaap_MajorCustomersAxis_9A3A63D411E14D088E87F15011F59284_terseLabel_en-US" xlink:label="lab_us-gaap_MajorCustomersAxis_9A3A63D411E14D088E87F15011F59284" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer [Axis]</link:label>
    <link:label id="lab_us-gaap_MajorCustomersAxis_9A3A63D411E14D088E87F15011F59284_label_en-US" xlink:label="lab_us-gaap_MajorCustomersAxis_9A3A63D411E14D088E87F15011F59284" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MajorCustomersAxis" xlink:label="loc_us-gaap_MajorCustomersAxis_9A3A63D411E14D088E87F15011F59284" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MajorCustomersAxis_9A3A63D411E14D088E87F15011F59284" xlink:to="lab_us-gaap_MajorCustomersAxis_9A3A63D411E14D088E87F15011F59284" xlink:type="arc" />
    <link:label id="lab_us-gaap_NameOfMajorCustomerDomain_2F553344768654F47417F15011F5E944_terseLabel_en-US" xlink:label="lab_us-gaap_NameOfMajorCustomerDomain_2F553344768654F47417F15011F5E944" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer [Domain]</link:label>
    <link:label id="lab_us-gaap_NameOfMajorCustomerDomain_2F553344768654F47417F15011F5E944_label_en-US" xlink:label="lab_us-gaap_NameOfMajorCustomerDomain_2F553344768654F47417F15011F5E944" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NameOfMajorCustomerDomain" xlink:label="loc_us-gaap_NameOfMajorCustomerDomain_2F553344768654F47417F15011F5E944" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NameOfMajorCustomerDomain_2F553344768654F47417F15011F5E944" xlink:to="lab_us-gaap_NameOfMajorCustomerDomain_2F553344768654F47417F15011F5E944" xlink:type="arc" />
    <link:label id="lab_nrg_MassCustomerMember_BB3C60CC93A474F828C2F15011F5CF15_terseLabel_en-US" xlink:label="lab_nrg_MassCustomerMember_BB3C60CC93A474F828C2F15011F5CF15" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mass customers</link:label>
    <link:label id="lab_nrg_MassCustomerMember_BB3C60CC93A474F828C2F15011F5CF15_label_en-US" xlink:label="lab_nrg_MassCustomerMember_BB3C60CC93A474F828C2F15011F5CF15" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mass Customer [Member]</link:label>
    <link:label id="lab_nrg_MassCustomerMember_BB3C60CC93A474F828C2F15011F5CF15_documentation_en-US" xlink:label="lab_nrg_MassCustomerMember_BB3C60CC93A474F828C2F15011F5CF15" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Mass Customer [Member]</link:label>
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    <link:label id="lab_nrg_BusinessSolutionsCustomersMember_C5E2A026D4547025F7F8F15011F6530B_terseLabel_en-US" xlink:label="lab_nrg_BusinessSolutionsCustomersMember_C5E2A026D4547025F7F8F15011F6530B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business solutions customers</link:label>
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    <link:label id="lab_us-gaap_DisaggregationOfRevenueLineItems_A87CF43FBC383CF77403F15011F74D35_label_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueLineItems_A87CF43FBC383CF77403F15011F74D35" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disaggregation of Revenue [Line Items]</link:label>
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    <link:label id="lab_nrg_UnrealizedGainLossOnDerivativesMarkToMarketEconomicHedgingActivities_F0E5E8C9F30E977FB975F15011F7B714_terseLabel_en-US" xlink:label="lab_nrg_UnrealizedGainLossOnDerivativesMarkToMarketEconomicHedgingActivities_F0E5E8C9F30E977FB975F15011F7B714" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mark-to-market for economic hedging activities</link:label>
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    <link:label id="lab_us-gaap_CapitalizedContractCostAmortization_8AA286F0C4E6EC4427E9F15011F8C9E0_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalizedContractCostAmortization_8AA286F0C4E6EC4427E9F15011F8C9E0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contract amortization</link:label>
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    <link:label id="lab_us-gaap_AccountsReceivableNetCurrent_BF3CA781FD1C0E24CFC3F7B4B40BD100_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_BF3CA781FD1C0E24CFC3F7B4B40BD100" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts receivable, net</link:label>
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    <link:label id="lab_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent_1A35370CD373621DE611F7B4B40CFA1D_verboseLabel_en-US" xlink:label="lab_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent_1A35370CD373621DE611F7B4B40CFA1D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Current assets held-for-sale</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_14EBE1D734D38ED85AE1F7B4B40C14A5_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_14EBE1D734D38ED85AE1F7B4B40C14A5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, plant and equipment, net</link:label>
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    <link:label id="lab_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_6D575B62FB84576011D9F7B4B40D47FD_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_6D575B62FB84576011D9F7B4B40D47FD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment in subsidiaries</link:label>
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    <link:label id="lab_us-gaap_NotesAndLoansReceivableNetNoncurrent_286A4669C717798BF896F7B4B40D3EF9_verboseLabel_en-US" xlink:label="lab_us-gaap_NotesAndLoansReceivableNetNoncurrent_286A4669C717798BF896F7B4B40D3EF9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Notes receivable, less current portion</link:label>
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    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax_E806B408CD208B466F97EDDFD8D6E1C9_periodEndLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax_E806B408CD208B466F97EDDFD8D6E1C9" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Accumulated OCI ending balance, net of $5, and $16 tax</link:label>
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    <link:label id="lab_nrg_SeniorNotes2024Member_B8C80BF1FC955167B782F7B4B52A913E_label_en-US" xlink:label="lab_nrg_SeniorNotes2024Member_B8C80BF1FC955167B782F7B4B52A913E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Senior Notes 2024 [Member]</link:label>
    <link:label id="lab_nrg_SeniorNotes2024Member_B8C80BF1FC955167B782F7B4B52A913E_documentation_en-US" xlink:label="lab_nrg_SeniorNotes2024Member_B8C80BF1FC955167B782F7B4B52A913E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Senior Notes 2024 [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_SeniorNotes2024Member" xlink:label="loc_nrg_SeniorNotes2024Member_B8C80BF1FC955167B782F7B4B52A913E" xlink:type="locator" />
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    <link:label id="lab_nrg_SeniorNotesdue2026Member_D1A14E4716EC70778F78F7B4B52B61D2_label_en-US" xlink:label="lab_nrg_SeniorNotesdue2026Member_D1A14E4716EC70778F78F7B4B52B61D2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Senior Notes due 2026 [Member]</link:label>
    <link:label id="lab_nrg_SeniorNotesdue2026Member_D1A14E4716EC70778F78F7B4B52B61D2_documentation_en-US" xlink:label="lab_nrg_SeniorNotesdue2026Member_D1A14E4716EC70778F78F7B4B52B61D2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Senior Notes due 2026 [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_SeniorNotesdue2026Member" xlink:label="loc_nrg_SeniorNotesdue2026Member_D1A14E4716EC70778F78F7B4B52B61D2" xlink:type="locator" />
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    <link:label id="lab_nrg_SeniorNotesdue2027Member_034EC5784BD08603BD33F7B4B52B9D71_terseLabel_en-US" xlink:label="lab_nrg_SeniorNotesdue2027Member_034EC5784BD08603BD33F7B4B52B9D71" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Senior Notes, due 2027</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_SeniorNotesdue2027Member" xlink:label="loc_nrg_SeniorNotesdue2027Member_034EC5784BD08603BD33F7B4B52B9D71" xlink:type="locator" />
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    <link:label id="lab_nrg_SeniorNotesdue2028Member_46C866CC63D11B3F8B23F7B4B52B930F_terseLabel_en-US" xlink:label="lab_nrg_SeniorNotesdue2028Member_46C866CC63D11B3F8B23F7B4B52B930F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Senior Notes, due 2028</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_SeniorNotesdue2028Member" xlink:label="loc_nrg_SeniorNotesdue2028Member_46C866CC63D11B3F8B23F7B4B52B930F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_SeniorNotesdue2028Member_46C866CC63D11B3F8B23F7B4B52B930F" xlink:to="lab_nrg_SeniorNotesdue2028Member_46C866CC63D11B3F8B23F7B4B52B930F" xlink:type="arc" />
    <link:label id="lab_nrg_ConvertibleSeniorNotesDue2048Member_8F298FC662ED045F99C4F7B4B52BF9C8_terseLabel_en-US" xlink:label="lab_nrg_ConvertibleSeniorNotesDue2048Member_8F298FC662ED045F99C4F7B4B52BF9C8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Convertible Senior Notes, due 2048</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_ConvertibleSeniorNotesDue2048Member" xlink:label="loc_nrg_ConvertibleSeniorNotesDue2048Member_8F298FC662ED045F99C4F7B4B52BF9C8" xlink:type="locator" />
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    <link:label id="lab_nrg_RevolvingLoanFacilityDue2018And2021Member_9EA3829D91181FDE4D18F7B4B52BD8A3_terseLabel_en-US" xlink:label="lab_nrg_RevolvingLoanFacilityDue2018And2021Member_9EA3829D91181FDE4D18F7B4B52BD8A3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revolving loan facility, due 2018 and 2021</link:label>
    <link:label id="lab_nrg_RevolvingLoanFacilityDue2018And2021Member_9EA3829D91181FDE4D18F7B4B52BD8A3_label_en-US" xlink:label="lab_nrg_RevolvingLoanFacilityDue2018And2021Member_9EA3829D91181FDE4D18F7B4B52BD8A3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revolving Loan Facility Due 2018 And 2021 [Member]</link:label>
    <link:label id="lab_nrg_RevolvingLoanFacilityDue2018And2021Member_9EA3829D91181FDE4D18F7B4B52BD8A3_documentation_en-US" xlink:label="lab_nrg_RevolvingLoanFacilityDue2018And2021Member_9EA3829D91181FDE4D18F7B4B52BD8A3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Revolving Loan Facility Due 2018 And 2021 [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_RevolvingLoanFacilityDue2018And2021Member" xlink:label="loc_nrg_RevolvingLoanFacilityDue2018And2021Member_9EA3829D91181FDE4D18F7B4B52BD8A3" xlink:type="locator" />
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    <link:label id="lab_nrg_TermLoanFacilityDue2023Member_D63E376170526D7044E8F7B4B52CE227_terseLabel_en-US" xlink:label="lab_nrg_TermLoanFacilityDue2023Member_D63E376170526D7044E8F7B4B52CE227" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Term loan facility, due 2023</link:label>
    <link:label id="lab_nrg_TermLoanFacilityDue2023Member_D63E376170526D7044E8F7B4B52CE227_label_en-US" xlink:label="lab_nrg_TermLoanFacilityDue2023Member_D63E376170526D7044E8F7B4B52CE227" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Term Loan Facility Due 2023 [Member]</link:label>
    <link:label id="lab_nrg_TermLoanFacilityDue2023Member_D63E376170526D7044E8F7B4B52CE227_documentation_en-US" xlink:label="lab_nrg_TermLoanFacilityDue2023Member_D63E376170526D7044E8F7B4B52CE227" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Term Loan Facility Due 2023 [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_TermLoanFacilityDue2023Member" xlink:label="loc_nrg_TermLoanFacilityDue2023Member_D63E376170526D7044E8F7B4B52CE227" xlink:type="locator" />
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    <link:label id="lab_nrg_TaxexemptBondsMember_210D0F10D2DA514B8909F7B4B52C5C2D_terseLabel_en-US" xlink:label="lab_nrg_TaxexemptBondsMember_210D0F10D2DA514B8909F7B4B52C5C2D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tax-exempt bonds</link:label>
    <link:label id="lab_nrg_TaxexemptBondsMember_210D0F10D2DA514B8909F7B4B52C5C2D_label_en-US" xlink:label="lab_nrg_TaxexemptBondsMember_210D0F10D2DA514B8909F7B4B52C5C2D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tax-exempt Bonds [Member]</link:label>
    <link:label id="lab_nrg_TaxexemptBondsMember_210D0F10D2DA514B8909F7B4B52C5C2D_documentation_en-US" xlink:label="lab_nrg_TaxexemptBondsMember_210D0F10D2DA514B8909F7B4B52C5C2D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tax-exempt Bonds [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_TaxexemptBondsMember" xlink:label="loc_nrg_TaxexemptBondsMember_210D0F10D2DA514B8909F7B4B52C5C2D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_TaxexemptBondsMember_210D0F10D2DA514B8909F7B4B52C5C2D" xlink:to="lab_nrg_TaxexemptBondsMember_210D0F10D2DA514B8909F7B4B52C5C2D" xlink:type="arc" />
    <link:label id="lab_nrg_A3.5ConvertibleNotesdue2019Member_18398497410E65A3E6DEF7B4B52CB89B_terseLabel_en-US" xlink:label="lab_nrg_A3.5ConvertibleNotesdue2019Member_18398497410E65A3E6DEF7B4B52CB89B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NRG Yield, Inc. Convertible Senior Notes, due 2019</link:label>
    <link:label id="lab_nrg_A3.5ConvertibleNotesdue2019Member_18398497410E65A3E6DEF7B4B52CB89B_label_en-US" xlink:label="lab_nrg_A3.5ConvertibleNotesdue2019Member_18398497410E65A3E6DEF7B4B52CB89B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">3.5% Convertible Notes due 2019 [Member]</link:label>
    <link:label id="lab_nrg_A3.5ConvertibleNotesdue2019Member_18398497410E65A3E6DEF7B4B52CB89B_documentation_en-US" xlink:label="lab_nrg_A3.5ConvertibleNotesdue2019Member_18398497410E65A3E6DEF7B4B52CB89B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">3.5% Convertible Notes due 2019 [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_A3.5ConvertibleNotesdue2019Member" xlink:label="loc_nrg_A3.5ConvertibleNotesdue2019Member_18398497410E65A3E6DEF7B4B52CB89B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_A3.5ConvertibleNotesdue2019Member_18398497410E65A3E6DEF7B4B52CB89B" xlink:to="lab_nrg_A3.5ConvertibleNotesdue2019Member_18398497410E65A3E6DEF7B4B52CB89B" xlink:type="arc" />
    <link:label id="lab_nrg_A3.25ConvertibleNotesdue2020Member_214A99FD04C46CF64026F7B4B52CF23D_terseLabel_en-US" xlink:label="lab_nrg_A3.25ConvertibleNotesdue2020Member_214A99FD04C46CF64026F7B4B52CF23D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NRG Yield, Inc. Convertible Senior Notes, due 2020</link:label>
    <link:label id="lab_nrg_A3.25ConvertibleNotesdue2020Member_214A99FD04C46CF64026F7B4B52CF23D_label_en-US" xlink:label="lab_nrg_A3.25ConvertibleNotesdue2020Member_214A99FD04C46CF64026F7B4B52CF23D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">3.25% Convertible Notes due 2020 [Member]</link:label>
    <link:label id="lab_nrg_A3.25ConvertibleNotesdue2020Member_214A99FD04C46CF64026F7B4B52CF23D_documentation_en-US" xlink:label="lab_nrg_A3.25ConvertibleNotesdue2020Member_214A99FD04C46CF64026F7B4B52CF23D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">3.25% Convertible Notes due 2020 [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_A3.25ConvertibleNotesdue2020Member" xlink:label="loc_nrg_A3.25ConvertibleNotesdue2020Member_214A99FD04C46CF64026F7B4B52CF23D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_A3.25ConvertibleNotesdue2020Member_214A99FD04C46CF64026F7B4B52CF23D" xlink:to="lab_nrg_A3.25ConvertibleNotesdue2020Member_214A99FD04C46CF64026F7B4B52CF23D" xlink:type="arc" />
    <link:label id="lab_nrg_A5.375SeniorNotesduein2024Member_33690E2AFC5D15CF2CC0F7B4B52C2D84_terseLabel_en-US" xlink:label="lab_nrg_A5.375SeniorNotesduein2024Member_33690E2AFC5D15CF2CC0F7B4B52C2D84" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NRG Yield, Inc. Convertible Senior Notes, due 2019</link:label>
    <link:label id="lab_nrg_A5.375SeniorNotesduein2024Member_33690E2AFC5D15CF2CC0F7B4B52C2D84_label_en-US" xlink:label="lab_nrg_A5.375SeniorNotesduein2024Member_33690E2AFC5D15CF2CC0F7B4B52C2D84" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">5.375% Senior Notes due in 2024 [Member]</link:label>
    <link:label id="lab_nrg_A5.375SeniorNotesduein2024Member_33690E2AFC5D15CF2CC0F7B4B52C2D84_documentation_en-US" xlink:label="lab_nrg_A5.375SeniorNotesduein2024Member_33690E2AFC5D15CF2CC0F7B4B52C2D84" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">5.375% Senior Notes due in 2024 [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_A5.375SeniorNotesduein2024Member" xlink:label="loc_nrg_A5.375SeniorNotesduein2024Member_33690E2AFC5D15CF2CC0F7B4B52C2D84" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_A5.375SeniorNotesduein2024Member_33690E2AFC5D15CF2CC0F7B4B52C2D84" xlink:to="lab_nrg_A5.375SeniorNotesduein2024Member_33690E2AFC5D15CF2CC0F7B4B52C2D84" xlink:type="arc" />
    <link:label id="lab_nrg_A5.00SeniorNotesduein2026Member_75B951DDB9A9B5F3B411F7B4B52C6A51_terseLabel_en-US" xlink:label="lab_nrg_A5.00SeniorNotesduein2026Member_75B951DDB9A9B5F3B411F7B4B52C6A51" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NRG Yield, Inc. Convertible Senior Notes, due 2020</link:label>
    <link:label id="lab_nrg_A5.00SeniorNotesduein2026Member_75B951DDB9A9B5F3B411F7B4B52C6A51_label_en-US" xlink:label="lab_nrg_A5.00SeniorNotesduein2026Member_75B951DDB9A9B5F3B411F7B4B52C6A51" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">5.00% Senior Notes due in 2026 [Member]</link:label>
    <link:label id="lab_nrg_A5.00SeniorNotesduein2026Member_75B951DDB9A9B5F3B411F7B4B52C6A51_documentation_en-US" xlink:label="lab_nrg_A5.00SeniorNotesduein2026Member_75B951DDB9A9B5F3B411F7B4B52C6A51" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">5.00% Senior Notes due in 2026 [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_A5.00SeniorNotesduein2026Member" xlink:label="loc_nrg_A5.00SeniorNotesduein2026Member_75B951DDB9A9B5F3B411F7B4B52C6A51" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_A5.00SeniorNotesduein2026Member_75B951DDB9A9B5F3B411F7B4B52C6A51" xlink:to="lab_nrg_A5.00SeniorNotesduein2026Member_75B951DDB9A9B5F3B411F7B4B52C6A51" xlink:type="arc" />
    <link:label id="lab_nrg_NRGYieldandNRGYieldOperatingLLCRevolvingCreditFacilityDue2023MemberMember_762A62220F3B1E931ED0F7B4B52D798D_terseLabel_en-US" xlink:label="lab_nrg_NRGYieldandNRGYieldOperatingLLCRevolvingCreditFacilityDue2023MemberMember_762A62220F3B1E931ED0F7B4B52D798D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NRG Yield LLC and NRG Yield Operating LLC Revolving Credit Facility, due 2023</link:label>
    <link:label id="lab_nrg_NRGYieldandNRGYieldOperatingLLCRevolvingCreditFacilityDue2023MemberMember_762A62220F3B1E931ED0F7B4B52D798D_label_en-US" xlink:label="lab_nrg_NRGYieldandNRGYieldOperatingLLCRevolvingCreditFacilityDue2023MemberMember_762A62220F3B1E931ED0F7B4B52D798D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NRG Yield and NRG Yield Operating LLC Revolving Credit Facility Due 2023 [Member] [Member]</link:label>
    <link:label id="lab_nrg_NRGYieldandNRGYieldOperatingLLCRevolvingCreditFacilityDue2023MemberMember_762A62220F3B1E931ED0F7B4B52D798D_documentation_en-US" xlink:label="lab_nrg_NRGYieldandNRGYieldOperatingLLCRevolvingCreditFacilityDue2023MemberMember_762A62220F3B1E931ED0F7B4B52D798D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">NRG Yield and NRG Yield Operating LLC Revolving Credit Facility Due 2023 [Member] [Member]</link:label>
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    <link:label id="lab_nrg_WestHoldingsCreditAgreementMember_9BFA6264B2888295E470F7B4B52DA462_terseLabel_en-US" xlink:label="lab_nrg_WestHoldingsCreditAgreementMember_9BFA6264B2888295E470F7B4B52DA462" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">El Segundo Energy Center, due 2023</link:label>
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    <link:label id="lab_nrg_MarshLandingTermLoanDue2023Member_3A23A6804C685DCF4383F7B4B52D9739_terseLabel_en-US" xlink:label="lab_nrg_MarshLandingTermLoanDue2023Member_3A23A6804C685DCF4383F7B4B52D9739" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Marsh Landing, due 2023</link:label>
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    <link:label id="lab_nrg_MarshLandingTermLoanDue2023Member_3A23A6804C685DCF4383F7B4B52D9739_documentation_en-US" xlink:label="lab_nrg_MarshLandingTermLoanDue2023Member_3A23A6804C685DCF4383F7B4B52D9739" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Marsh Landing Term Loan Due 2023 [Member]</link:label>
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    <link:label id="lab_nrg_AltaWindIVLeasefinancingarrangementMember_C7501C9DD918751EA2C5F7B4B52D9CB7_terseLabel_en-US" xlink:label="lab_nrg_AltaWindIVLeasefinancingarrangementMember_C7501C9DD918751EA2C5F7B4B52D9CB7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Alta Wind I - V lease financing arrangements, due 2034 and 2035</link:label>
    <link:label id="lab_nrg_AltaWindIVLeasefinancingarrangementMember_C7501C9DD918751EA2C5F7B4B52D9CB7_label_en-US" xlink:label="lab_nrg_AltaWindIVLeasefinancingarrangementMember_C7501C9DD918751EA2C5F7B4B52D9CB7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Alta Wind I - V Lease financing arrangement [Member]</link:label>
    <link:label id="lab_nrg_AltaWindIVLeasefinancingarrangementMember_C7501C9DD918751EA2C5F7B4B52D9CB7_documentation_en-US" xlink:label="lab_nrg_AltaWindIVLeasefinancingarrangementMember_C7501C9DD918751EA2C5F7B4B52D9CB7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Alta Wind I - V Lease financing arrangement [Member]</link:label>
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    <link:label id="lab_nrg_WalnutCreekEnergyLLCduein2023Member_14E06F57A555C4901C83F7B4B52D24C1_terseLabel_en-US" xlink:label="lab_nrg_WalnutCreekEnergyLLCduein2023Member_14E06F57A555C4901C83F7B4B52D24C1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Walnut Creek, term loans due 2023</link:label>
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    <link:label id="lab_nrg_WalnutCreekEnergyLLCduein2023Member_14E06F57A555C4901C83F7B4B52D24C1_documentation_en-US" xlink:label="lab_nrg_WalnutCreekEnergyLLCduein2023Member_14E06F57A555C4901C83F7B4B52D24C1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Walnut Creek Energy, LLC, due in 2023 [Member]</link:label>
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    <link:label id="lab_nrg_UtahPortfolioMember_A4B27ACE90D09D88FB96F7B4B52DB160_terseLabel_en-US" xlink:label="lab_nrg_UtahPortfolioMember_A4B27ACE90D09D88FB96F7B4B52DB160" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Utah Portfolio, due 2022</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_UtahPortfolioMember" xlink:label="loc_nrg_UtahPortfolioMember_A4B27ACE90D09D88FB96F7B4B52DB160" xlink:type="locator" />
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    <link:label id="lab_nrg_TapestryWindLLCduein2021Member_FCB050DAA1D126C9AF03F7B4B52E031F_terseLabel_en-US" xlink:label="lab_nrg_TapestryWindLLCduein2021Member_FCB050DAA1D126C9AF03F7B4B52E031F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tapestry, due 2021</link:label>
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    <link:label id="lab_nrg_TapestryWindLLCduein2021Member_FCB050DAA1D126C9AF03F7B4B52E031F_documentation_en-US" xlink:label="lab_nrg_TapestryWindLLCduein2021Member_FCB050DAA1D126C9AF03F7B4B52E031F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tapestry Wind LLC due in 2021 [Member]</link:label>
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    <link:label id="lab_nrg_CVSRdue2037Member_42C25EE56A32F9A56689F7B4B52E4680_terseLabel_en-US" xlink:label="lab_nrg_CVSRdue2037Member_42C25EE56A32F9A56689F7B4B52E4680" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">CVSR, due 2037</link:label>
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    <link:loc xlink:href="nrg-20180630.xsd#nrg_CVSRHoldcodue2037Member" xlink:label="loc_nrg_CVSRHoldcodue2037Member_FFD8BBC42819EB53A336F7B4B52E71E1" xlink:type="locator" />
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    <link:label id="lab_nrg_AlpineFinancingAgreementDue2022Member_022ABDCFE5FD84E18376F7B4B52EB4E7_terseLabel_en-US" xlink:label="lab_nrg_AlpineFinancingAgreementDue2022Member_022ABDCFE5FD84E18376F7B4B52EB4E7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Alpine, due 2022</link:label>
    <link:label id="lab_nrg_AlpineFinancingAgreementDue2022Member_022ABDCFE5FD84E18376F7B4B52EB4E7_label_en-US" xlink:label="lab_nrg_AlpineFinancingAgreementDue2022Member_022ABDCFE5FD84E18376F7B4B52EB4E7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Alpine Financing Agreement, due 2022 [Member]</link:label>
    <link:label id="lab_nrg_AlpineFinancingAgreementDue2022Member_022ABDCFE5FD84E18376F7B4B52EB4E7_documentation_en-US" xlink:label="lab_nrg_AlpineFinancingAgreementDue2022Member_022ABDCFE5FD84E18376F7B4B52EB4E7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Alpine Financing Agreement, due 2022 [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_AlpineFinancingAgreementDue2022Member" xlink:label="loc_nrg_AlpineFinancingAgreementDue2022Member_022ABDCFE5FD84E18376F7B4B52EB4E7" xlink:type="locator" />
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    <link:label id="lab_nrg_NRGEnergyCenterMinneapolisLLCSeniorNotesdue203120332035and2037Member_BCA571454F0EEEA40304F7B4B52EB523_terseLabel_en-US" xlink:label="lab_nrg_NRGEnergyCenterMinneapolisLLCSeniorNotesdue203120332035and2037Member_BCA571454F0EEEA40304F7B4B52EB523" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Energy Center Minneapolis, due 2031, 2033, 2035 and 2037</link:label>
    <link:label id="lab_nrg_NRGEnergyCenterMinneapolisLLCSeniorNotesdue203120332035and2037Member_BCA571454F0EEEA40304F7B4B52EB523_label_en-US" xlink:label="lab_nrg_NRGEnergyCenterMinneapolisLLCSeniorNotesdue203120332035and2037Member_BCA571454F0EEEA40304F7B4B52EB523" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NRG Energy Center Minneapolis LLC Senior Notes due 2031, 2033, 2035 and 2037 [Member]</link:label>
    <link:label id="lab_nrg_NRGEnergyCenterMinneapolisLLCSeniorNotesdue203120332035and2037Member_BCA571454F0EEEA40304F7B4B52EB523_documentation_en-US" xlink:label="lab_nrg_NRGEnergyCenterMinneapolisLLCSeniorNotesdue203120332035and2037Member_BCA571454F0EEEA40304F7B4B52EB523" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">NRG Energy Center Minneapolis LLC Senior Notes due 2031, 2033, 2035 and 2037 [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_NRGEnergyCenterMinneapolisLLCSeniorNotesdue203120332035and2037Member" xlink:label="loc_nrg_NRGEnergyCenterMinneapolisLLCSeniorNotesdue203120332035and2037Member_BCA571454F0EEEA40304F7B4B52EB523" xlink:type="locator" />
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    <link:label id="lab_nrg_VientoFundingIIInc.duein2023Member_B5B88C3F24B6CC028C58F7B4B52E1911_terseLabel_en-US" xlink:label="lab_nrg_VientoFundingIIInc.duein2023Member_B5B88C3F24B6CC028C58F7B4B52E1911" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Viento, due 2023</link:label>
    <link:label id="lab_nrg_VientoFundingIIInc.duein2023Member_B5B88C3F24B6CC028C58F7B4B52E1911_label_en-US" xlink:label="lab_nrg_VientoFundingIIInc.duein2023Member_B5B88C3F24B6CC028C58F7B4B52E1911" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Viento Funding II, Inc., due in 2023 [Member]</link:label>
    <link:label id="lab_nrg_VientoFundingIIInc.duein2023Member_B5B88C3F24B6CC028C58F7B4B52E1911_documentation_en-US" xlink:label="lab_nrg_VientoFundingIIInc.duein2023Member_B5B88C3F24B6CC028C58F7B4B52E1911" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Viento Funding II, Inc., due in 2023 [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_VientoFundingIIInc.duein2023Member" xlink:label="loc_nrg_VientoFundingIIInc.duein2023Member_B5B88C3F24B6CC028C58F7B4B52E1911" xlink:type="locator" />
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    <link:label id="lab_nrg_BuckthornSolarDue2018And2025Member_C986D5A9AA88BA9A8183F7B4B52F3AC0_terseLabel_en-US" xlink:label="lab_nrg_BuckthornSolarDue2018And2025Member_C986D5A9AA88BA9A8183F7B4B52F3AC0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Buckthorn Solar, due 2018 and 2025</link:label>
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    <link:label id="lab_nrg_BuckthornSolarDue2018And2025Member_C986D5A9AA88BA9A8183F7B4B52F3AC0_documentation_en-US" xlink:label="lab_nrg_BuckthornSolarDue2018And2025Member_C986D5A9AA88BA9A8183F7B4B52F3AC0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Buckthorn Solar [Member]</link:label>
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    <link:label id="lab_nrg_NRGYieldOtherMember_FACF85023757E56135B7F7B4B52F1245_label_en-US" xlink:label="lab_nrg_NRGYieldOtherMember_FACF85023757E56135B7F7B4B52F1245" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NRG Yield - Other [Member]</link:label>
    <link:label id="lab_nrg_NRGYieldOtherMember_FACF85023757E56135B7F7B4B52F1245_documentation_en-US" xlink:label="lab_nrg_NRGYieldOtherMember_FACF85023757E56135B7F7B4B52F1245" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">NRG Yield - Other [Member]</link:label>
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    <link:label id="lab_nrg_IvanpahCreditAgreementMember_B4B4F58BF1A8759F561BF7B4B52F67C7_terseLabel_en-US" xlink:label="lab_nrg_IvanpahCreditAgreementMember_B4B4F58BF1A8759F561BF7B4B52F67C7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ivanpah, due 2033 and 2038</link:label>
    <link:label id="lab_nrg_IvanpahCreditAgreementMember_B4B4F58BF1A8759F561BF7B4B52F67C7_label_en-US" xlink:label="lab_nrg_IvanpahCreditAgreementMember_B4B4F58BF1A8759F561BF7B4B52F67C7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ivanpah Credit Agreement [Member]</link:label>
    <link:label id="lab_nrg_IvanpahCreditAgreementMember_B4B4F58BF1A8759F561BF7B4B52F67C7_documentation_en-US" xlink:label="lab_nrg_IvanpahCreditAgreementMember_B4B4F58BF1A8759F561BF7B4B52F67C7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ivanpah Credit Agreement [Member]</link:label>
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    <link:label id="lab_nrg_CarlsbadEnergyHoldingsLLCSeniorSecuredNotesdue2038Member_92117B4BF74CAD483F32F7B4B52FEA41_terseLabel_en-US" xlink:label="lab_nrg_CarlsbadEnergyHoldingsLLCSeniorSecuredNotesdue2038Member_92117B4BF74CAD483F32F7B4B52FEA41" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Carlsbad Energy Project</link:label>
    <link:label id="lab_nrg_CarlsbadEnergyHoldingsLLCSeniorSecuredNotesdue2038Member_92117B4BF74CAD483F32F7B4B52FEA41_label_en-US" xlink:label="lab_nrg_CarlsbadEnergyHoldingsLLCSeniorSecuredNotesdue2038Member_92117B4BF74CAD483F32F7B4B52FEA41" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Carlsbad Energy Holdings, LLC, Senior Secured Notes due 2038 [Member]</link:label>
    <link:label id="lab_nrg_CarlsbadEnergyHoldingsLLCSeniorSecuredNotesdue2038Member_92117B4BF74CAD483F32F7B4B52FEA41_documentation_en-US" xlink:label="lab_nrg_CarlsbadEnergyHoldingsLLCSeniorSecuredNotesdue2038Member_92117B4BF74CAD483F32F7B4B52FEA41" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Carlsbad Energy Holdings, LLC, Senior Secured Notes due 2038</link:label>
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    <link:label id="lab_nrg_AguaCalienteFinancingAgreementMember_9C93AD002F648311E29FF7B4B5305EDA_terseLabel_en-US" xlink:label="lab_nrg_AguaCalienteFinancingAgreementMember_9C93AD002F648311E29FF7B4B5305EDA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Agua Caliente, due 2037</link:label>
    <link:label id="lab_nrg_AguaCalienteFinancingAgreementMember_9C93AD002F648311E29FF7B4B5305EDA_label_en-US" xlink:label="lab_nrg_AguaCalienteFinancingAgreementMember_9C93AD002F648311E29FF7B4B5305EDA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Agua Caliente Financing Agreement [Member]</link:label>
    <link:label id="lab_nrg_AguaCalienteFinancingAgreementMember_9C93AD002F648311E29FF7B4B5305EDA_documentation_en-US" xlink:label="lab_nrg_AguaCalienteFinancingAgreementMember_9C93AD002F648311E29FF7B4B5305EDA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Agua Caliente Financing Agreement [Member]</link:label>
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    <link:label id="lab_nrg_AguaCalienteBorrower1due2038Member_3A1B35A36B13C7699D75F7B4B5306005_terseLabel_en-US" xlink:label="lab_nrg_AguaCalienteBorrower1due2038Member_3A1B35A36B13C7699D75F7B4B5306005" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Agua Caliente Borrower 1, due 2038</link:label>
    <link:label id="lab_nrg_AguaCalienteBorrower1due2038Member_3A1B35A36B13C7699D75F7B4B5306005_label_en-US" xlink:label="lab_nrg_AguaCalienteBorrower1due2038Member_3A1B35A36B13C7699D75F7B4B5306005" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Agua Caliente Borrower 1, due 2038 [Member]</link:label>
    <link:label id="lab_nrg_AguaCalienteBorrower1due2038Member_3A1B35A36B13C7699D75F7B4B5306005_documentation_en-US" xlink:label="lab_nrg_AguaCalienteBorrower1due2038Member_3A1B35A36B13C7699D75F7B4B5306005" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Agua Caliente Borrower 1, due 2038 [Member]</link:label>
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    <link:label id="lab_nrg_CedroHillWindLLCduein2025Member_891B93FCCA0FAB08B0DEF7B4B530C97D_terseLabel_en-US" xlink:label="lab_nrg_CedroHillWindLLCduein2025Member_891B93FCCA0FAB08B0DEF7B4B530C97D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cedro Hill, due 2025</link:label>
    <link:label id="lab_nrg_CedroHillWindLLCduein2025Member_891B93FCCA0FAB08B0DEF7B4B530C97D_label_en-US" xlink:label="lab_nrg_CedroHillWindLLCduein2025Member_891B93FCCA0FAB08B0DEF7B4B530C97D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cedro Hill Wind LLC, due in 2025 [Member]</link:label>
    <link:label id="lab_nrg_CedroHillWindLLCduein2025Member_891B93FCCA0FAB08B0DEF7B4B530C97D_documentation_en-US" xlink:label="lab_nrg_CedroHillWindLLCduein2025Member_891B93FCCA0FAB08B0DEF7B4B530C97D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cedro Hill Wind LLC, due in 2025 [Member]</link:label>
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    <link:label id="lab_nrg_MidwestGenerationdue2019Member_62AAEC5362F6A89DBA0AF7B4B53002FE_terseLabel_en-US" xlink:label="lab_nrg_MidwestGenerationdue2019Member_62AAEC5362F6A89DBA0AF7B4B53002FE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Midwest Generation, due 2019</link:label>
    <link:label id="lab_nrg_MidwestGenerationdue2019Member_62AAEC5362F6A89DBA0AF7B4B53002FE_label_en-US" xlink:label="lab_nrg_MidwestGenerationdue2019Member_62AAEC5362F6A89DBA0AF7B4B53002FE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Midwest Generation due 2019 [Member]</link:label>
    <link:label id="lab_nrg_MidwestGenerationdue2019Member_62AAEC5362F6A89DBA0AF7B4B53002FE_documentation_en-US" xlink:label="lab_nrg_MidwestGenerationdue2019Member_62AAEC5362F6A89DBA0AF7B4B53002FE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Midwest Generation due 2019 [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_MidwestGenerationdue2019Member" xlink:label="loc_nrg_MidwestGenerationdue2019Member_62AAEC5362F6A89DBA0AF7B4B53002FE" xlink:type="locator" />
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    <link:label id="lab_nrg_OtherRenewablesDebtMember_8B1B5EE689B6A50808A8F7B4B5303F7E_terseLabel_en-US" xlink:label="lab_nrg_OtherRenewablesDebtMember_8B1B5EE689B6A50808A8F7B4B5303F7E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NRG Other Renewables</link:label>
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    <link:label id="lab_nrg_OtherRenewablesDebtMember_8B1B5EE689B6A50808A8F7B4B5303F7E_documentation_en-US" xlink:label="lab_nrg_OtherRenewablesDebtMember_8B1B5EE689B6A50808A8F7B4B5303F7E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Renewables Debt [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_OtherRenewablesDebtMember" xlink:label="loc_nrg_OtherRenewablesDebtMember_8B1B5EE689B6A50808A8F7B4B5303F7E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_nrg_OtherRenewablesDebtMember_8B1B5EE689B6A50808A8F7B4B5303F7E" xlink:to="lab_nrg_OtherRenewablesDebtMember_8B1B5EE689B6A50808A8F7B4B5303F7E" xlink:type="arc" />
    <link:label id="lab_nrg_OtherDebtMember_576CFC4697DEFB44155FF7B4B530086B_terseLabel_en-US" xlink:label="lab_nrg_OtherDebtMember_576CFC4697DEFB44155FF7B4B530086B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NRG Other</link:label>
    <link:label id="lab_nrg_OtherDebtMember_576CFC4697DEFB44155FF7B4B530086B_label_en-US" xlink:label="lab_nrg_OtherDebtMember_576CFC4697DEFB44155FF7B4B530086B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Debt [Member]</link:label>
    <link:label id="lab_nrg_OtherDebtMember_576CFC4697DEFB44155FF7B4B530086B_documentation_en-US" xlink:label="lab_nrg_OtherDebtMember_576CFC4697DEFB44155FF7B4B530086B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents other debt instruments not separately accounted disclosed.</link:label>
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    <link:label id="lab_nrg_NrgEnergyMember_FE81753841D7CF707012F7B4B5315169_terseLabel_en-US" xlink:label="lab_nrg_NrgEnergyMember_FE81753841D7CF707012F7B4B5315169" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subtotal other NRG non-recourse debt</link:label>
    <link:label id="lab_nrg_NrgEnergyMember_FE81753841D7CF707012F7B4B5315169_label_en-US" xlink:label="lab_nrg_NrgEnergyMember_FE81753841D7CF707012F7B4B5315169" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NRG Energy [Member]</link:label>
    <link:label id="lab_nrg_NrgEnergyMember_FE81753841D7CF707012F7B4B5315169_documentation_en-US" xlink:label="lab_nrg_NrgEnergyMember_FE81753841D7CF707012F7B4B5315169" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">NRG Energy [Member]</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_NrgEnergyMember" xlink:label="loc_nrg_NrgEnergyMember_FE81753841D7CF707012F7B4B5315169" xlink:type="locator" />
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    <link:label id="lab_us-gaap_VariableRateAxis_70E14E4CBDE51ECAEF2EF7B4B5313285_label_en-US" xlink:label="lab_us-gaap_VariableRateAxis_70E14E4CBDE51ECAEF2EF7B4B5313285" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Rate [Axis]</link:label>
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    <link:label id="lab_us-gaap_ShortTermDebtTypeAxis_8E4C8811C3EADC510974F1501037C80A_terseLabel_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeAxis_8E4C8811C3EADC510974F1501037C80A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-term Debt, Type [Axis]</link:label>
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    <link:label id="lab_us-gaap_CreditFacilityAxis_B84D5A005EAB452F2318F150103D5B08_label_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis_B84D5A005EAB452F2318F150103D5B08" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Credit Facility [Axis]</link:label>
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    <link:label id="lab_us-gaap_CreditFacilityDomain_96450EB8B1E2C1551D40F150103E573D_terseLabel_en-US" xlink:label="lab_us-gaap_CreditFacilityDomain_96450EB8B1E2C1551D40F150103E573D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit Facility [Domain]</link:label>
    <link:label id="lab_us-gaap_CreditFacilityDomain_96450EB8B1E2C1551D40F150103E573D_label_en-US" xlink:label="lab_us-gaap_CreditFacilityDomain_96450EB8B1E2C1551D40F150103E573D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Credit Facility [Domain]</link:label>
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    <link:label id="lab_nrg_RosamondSolarPortfolioLLCFinancingAgreementMember_8E8967A5C0804684D201F150103EDD74_terseLabel_en-US" xlink:label="lab_nrg_RosamondSolarPortfolioLLCFinancingAgreementMember_8E8967A5C0804684D201F150103EDD74" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rosamond Solar Portfolio LLC Financing Agreement</link:label>
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    <link:label id="lab_nrg_CarlsbadFinancingAgreementMember_226CCCB5F90DCFAC7AA2F150103ECD32_terseLabel_en-US" xlink:label="lab_nrg_CarlsbadFinancingAgreementMember_226CCCB5F90DCFAC7AA2F150103ECD32" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Carlsbad Financing Agreement</link:label>
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    <link:label id="lab_nrg_CarlsbadFinancingAgreementMember_226CCCB5F90DCFAC7AA2F150103ECD32_documentation_en-US" xlink:label="lab_nrg_CarlsbadFinancingAgreementMember_226CCCB5F90DCFAC7AA2F150103ECD32" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Carlsbad Financing Agreement</link:label>
    <link:loc xlink:href="nrg-20180630.xsd#nrg_CarlsbadFinancingAgreementMember" xlink:label="loc_nrg_CarlsbadFinancingAgreementMember_226CCCB5F90DCFAC7AA2F150103ECD32" xlink:type="locator" />
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    <link:label id="lab_nrg_WorkingCapitalFacilityMember_99991E7E57259DB5C91FF150103E94F2_documentation_en-US" xlink:label="lab_nrg_WorkingCapitalFacilityMember_99991E7E57259DB5C91FF150103E94F2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Working Capital Facility [Member]</link:label>
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    <link:label id="lab_nrg_LondonInterbankOfferedRateLIBORfloorMember_558E37A0D57C4D9D8F2BF150103FE856_terseLabel_en-US" xlink:label="lab_nrg_LondonInterbankOfferedRateLIBORfloorMember_558E37A0D57C4D9D8F2BF150103FE856" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LIBOR floor</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentInterestRateIncreaseDecrease_02DBA9EFF9D98861205AF15010401046_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateIncreaseDecrease_02DBA9EFF9D98861205AF15010401046" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Change in interest rate</link:label>
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