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    <link:label id="lab_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_F813A1A655442A25AE7462B6A3DE417C_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_F813A1A655442A25AE7462B6A3DE417C" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Gain on the sale of CoaLogix, net of income taxes</link:label>
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    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_FBD6FD141E3E4C7F0CF962B6A46BE9FD_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_FBD6FD141E3E4C7F0CF962B6A46BE9FD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_FBD6FD141E3E4C7F0CF962B6A46BE9FD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_FBD6FD141E3E4C7F0CF962B6A46BE9FD" xlink:to="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_FBD6FD141E3E4C7F0CF962B6A46BE9FD" xlink:type="arc" />
    <link:label id="lab_acfn_ExercisePriceRangeOneMember_B8B4666D79262D8C839962B6A46BC626_terseLabel_en-US" xlink:label="lab_acfn_ExercisePriceRangeOneMember_B8B4666D79262D8C839962B6A46BC626" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">$2.24 - $2.56</link:label>
    <link:label id="lab_acfn_ExercisePriceRangeOneMember_B8B4666D79262D8C839962B6A46BC626_label_en-US" xlink:label="lab_acfn_ExercisePriceRangeOneMember_B8B4666D79262D8C839962B6A46BC626" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Exercise Price Range One [Member]</link:label>
    <link:label id="lab_acfn_ExercisePriceRangeOneMember_B8B4666D79262D8C839962B6A46BC626_documentation_en-US" xlink:label="lab_acfn_ExercisePriceRangeOneMember_B8B4666D79262D8C839962B6A46BC626" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Exercise Price Range One [Member]</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_ExercisePriceRangeOneMember" xlink:label="loc_acfn_ExercisePriceRangeOneMember_B8B4666D79262D8C839962B6A46BC626" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_ExercisePriceRangeOneMember_B8B4666D79262D8C839962B6A46BC626" xlink:to="lab_acfn_ExercisePriceRangeOneMember_B8B4666D79262D8C839962B6A46BC626" xlink:type="arc" />
    <link:label id="lab_acfn_ExercisePriceRangeTwoMember_A2A2CDCBED5C504CE1D562B6A46B8020_terseLabel_en-US" xlink:label="lab_acfn_ExercisePriceRangeTwoMember_A2A2CDCBED5C504CE1D562B6A46B8020" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">$3.28 - $3.90</link:label>
    <link:label id="lab_acfn_ExercisePriceRangeTwoMember_A2A2CDCBED5C504CE1D562B6A46B8020_label_en-US" xlink:label="lab_acfn_ExercisePriceRangeTwoMember_A2A2CDCBED5C504CE1D562B6A46B8020" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Exercise Price Range Two [Member]</link:label>
    <link:label id="lab_acfn_ExercisePriceRangeTwoMember_A2A2CDCBED5C504CE1D562B6A46B8020_documentation_en-US" xlink:label="lab_acfn_ExercisePriceRangeTwoMember_A2A2CDCBED5C504CE1D562B6A46B8020" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Exercise Price Range Two [Member]</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_ExercisePriceRangeTwoMember" xlink:label="loc_acfn_ExercisePriceRangeTwoMember_A2A2CDCBED5C504CE1D562B6A46B8020" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_ExercisePriceRangeTwoMember_A2A2CDCBED5C504CE1D562B6A46B8020" xlink:to="lab_acfn_ExercisePriceRangeTwoMember_A2A2CDCBED5C504CE1D562B6A46B8020" xlink:type="arc" />
    <link:label id="lab_acfn_ExercisePriceRangeThreeMember_C5EBFBE143926D94271862B6A46BD90E_terseLabel_en-US" xlink:label="lab_acfn_ExercisePriceRangeThreeMember_C5EBFBE143926D94271862B6A46BD90E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">$4.09 - $4.96</link:label>
    <link:label id="lab_acfn_ExercisePriceRangeThreeMember_C5EBFBE143926D94271862B6A46BD90E_label_en-US" xlink:label="lab_acfn_ExercisePriceRangeThreeMember_C5EBFBE143926D94271862B6A46BD90E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Exercise Price Range Three [Member]</link:label>
    <link:label id="lab_acfn_ExercisePriceRangeThreeMember_C5EBFBE143926D94271862B6A46BD90E_documentation_en-US" xlink:label="lab_acfn_ExercisePriceRangeThreeMember_C5EBFBE143926D94271862B6A46BD90E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Exercise Price Range Three [Member]</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_ExercisePriceRangeThreeMember" xlink:label="loc_acfn_ExercisePriceRangeThreeMember_C5EBFBE143926D94271862B6A46BD90E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_ExercisePriceRangeThreeMember_C5EBFBE143926D94271862B6A46BD90E" xlink:to="lab_acfn_ExercisePriceRangeThreeMember_C5EBFBE143926D94271862B6A46BD90E" xlink:type="arc" />
    <link:label id="lab_acfn_ExercisePriceRangeFourMember_8AA539A0EE62148FA59262B6A46B5BCA_terseLabel_en-US" xlink:label="lab_acfn_ExercisePriceRangeFourMember_8AA539A0EE62148FA59262B6A46B5BCA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">$5.05 - $5.50</link:label>
    <link:label id="lab_acfn_ExercisePriceRangeFourMember_8AA539A0EE62148FA59262B6A46B5BCA_label_en-US" xlink:label="lab_acfn_ExercisePriceRangeFourMember_8AA539A0EE62148FA59262B6A46B5BCA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Exercise Price Range Four [Member]</link:label>
    <link:label id="lab_acfn_ExercisePriceRangeFourMember_8AA539A0EE62148FA59262B6A46B5BCA_documentation_en-US" xlink:label="lab_acfn_ExercisePriceRangeFourMember_8AA539A0EE62148FA59262B6A46B5BCA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Exercise Price Range Four [Member]</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_ExercisePriceRangeFourMember" xlink:label="loc_acfn_ExercisePriceRangeFourMember_8AA539A0EE62148FA59262B6A46B5BCA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_ExercisePriceRangeFourMember_8AA539A0EE62148FA59262B6A46B5BCA" xlink:to="lab_acfn_ExercisePriceRangeFourMember_8AA539A0EE62148FA59262B6A46B5BCA" xlink:type="arc" />
    <link:label id="lab_acfn_ExercisePriceRangeFiveMember_B5065836DDFA68BE6C7062B6A46BD530_terseLabel_en-US" xlink:label="lab_acfn_ExercisePriceRangeFiveMember_B5065836DDFA68BE6C7062B6A46BD530" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">$6.49 - $7.57</link:label>
    <link:label id="lab_acfn_ExercisePriceRangeFiveMember_B5065836DDFA68BE6C7062B6A46BD530_label_en-US" xlink:label="lab_acfn_ExercisePriceRangeFiveMember_B5065836DDFA68BE6C7062B6A46BD530" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Exercise Price Range Five [Member]</link:label>
    <link:label id="lab_acfn_ExercisePriceRangeFiveMember_B5065836DDFA68BE6C7062B6A46BD530_documentation_en-US" xlink:label="lab_acfn_ExercisePriceRangeFiveMember_B5065836DDFA68BE6C7062B6A46BD530" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Exercise Price Range Five [Member]</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_ExercisePriceRangeFiveMember" xlink:label="loc_acfn_ExercisePriceRangeFiveMember_B5065836DDFA68BE6C7062B6A46BD530" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_ExercisePriceRangeFiveMember_B5065836DDFA68BE6C7062B6A46BD530" xlink:to="lab_acfn_ExercisePriceRangeFiveMember_B5065836DDFA68BE6C7062B6A46BD530" xlink:type="arc" />
    <link:label id="lab_acfn_ExercisePriceRangeSixMember_C2DC2BF76C45467D110A62B6A46B8C3B_terseLabel_en-US" xlink:label="lab_acfn_ExercisePriceRangeSixMember_C2DC2BF76C45467D110A62B6A46B8C3B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">$7.38 - $11.42</link:label>
    <link:label id="lab_acfn_ExercisePriceRangeSixMember_C2DC2BF76C45467D110A62B6A46B8C3B_label_en-US" xlink:label="lab_acfn_ExercisePriceRangeSixMember_C2DC2BF76C45467D110A62B6A46B8C3B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Exercise Price Range Six [Member]</link:label>
    <link:label id="lab_acfn_ExercisePriceRangeSixMember_C2DC2BF76C45467D110A62B6A46B8C3B_documentation_en-US" xlink:label="lab_acfn_ExercisePriceRangeSixMember_C2DC2BF76C45467D110A62B6A46B8C3B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Exercise Price Range Six [Member]</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_ExercisePriceRangeSixMember" xlink:label="loc_acfn_ExercisePriceRangeSixMember_C2DC2BF76C45467D110A62B6A46B8C3B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_ExercisePriceRangeSixMember_C2DC2BF76C45467D110A62B6A46B8C3B" xlink:to="lab_acfn_ExercisePriceRangeSixMember_C2DC2BF76C45467D110A62B6A46B8C3B" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_FA3A65E78C6157F59B5E62B6A46B0594_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_FA3A65E78C6157F59B5E62B6A46B0594" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_FA3A65E78C6157F59B5E62B6A46B0594_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_FA3A65E78C6157F59B5E62B6A46B0594" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_FA3A65E78C6157F59B5E62B6A46B0594" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_FA3A65E78C6157F59B5E62B6A46B0594" xlink:to="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_FA3A65E78C6157F59B5E62B6A46B0594" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_1B61CAFA7A24F3D8050D62B6A46BFB91_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_1B61CAFA7A24F3D8050D62B6A46BFB91" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of outstanding options</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_1B61CAFA7A24F3D8050D62B6A46BFB91_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_1B61CAFA7A24F3D8050D62B6A46BFB91" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_1B61CAFA7A24F3D8050D62B6A46BFB91" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_1B61CAFA7A24F3D8050D62B6A46BFB91" xlink:to="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_1B61CAFA7A24F3D8050D62B6A46BFB91" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_CBFBEE809F40B9DC05CE62B6A46B1596_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_CBFBEE809F40B9DC05CE62B6A46B1596" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Outstanding options, weighted average remaining contractual term</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_CBFBEE809F40B9DC05CE62B6A46B1596" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_CBFBEE809F40B9DC05CE62B6A46B1596" xlink:to="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_CBFBEE809F40B9DC05CE62B6A46B1596" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_3B987542BC30FF1E310462B6A46B3CE3_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_3B987542BC30FF1E310462B6A46B3CE3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Outstanding options, weighted average exercise price</link:label>
    <link:label id="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_3B987542BC30FF1E310462B6A46B3CE3_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_3B987542BC30FF1E310462B6A46B3CE3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_3B987542BC30FF1E310462B6A46B3CE3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_3B987542BC30FF1E310462B6A46B3CE3" xlink:to="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_3B987542BC30FF1E310462B6A46B3CE3" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_B77F8A06BB0A933B002762B6A46B8867_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_B77F8A06BB0A933B002762B6A46B8867" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of exercisable options</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_B77F8A06BB0A933B002762B6A46B8867_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_B77F8A06BB0A933B002762B6A46B8867" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_B77F8A06BB0A933B002762B6A46B8867" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_B77F8A06BB0A933B002762B6A46B8867" xlink:to="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_B77F8A06BB0A933B002762B6A46B8867" xlink:type="arc" />
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_0F0AD5FC1F42C6D626397D45AE31FAD8" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_0F0AD5FC1F42C6D626397D45AE31FAD8" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_C2822A8DE69344B82B177D45AE31C349_totalLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_C2822A8DE69344B82B177D45AE31C349" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Adjustments to reconcile net income (loss) to net cash used in operating activities (see Schedule A):</link:label>
    <link:label id="lab_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_C2822A8DE69344B82B177D45AE31C349_label_en-US" xlink:label="lab_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_C2822A8DE69344B82B177D45AE31C349" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_C2822A8DE69344B82B177D45AE31C349" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_C2822A8DE69344B82B177D45AE31C349" xlink:to="lab_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_C2822A8DE69344B82B177D45AE31C349" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_2F3C7F897B6430794BD77D45AE311BE3_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_2F3C7F897B6430794BD77D45AE311BE3" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash used in operating activities - continuing operations</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_2F3C7F897B6430794BD77D45AE311BE3_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_2F3C7F897B6430794BD77D45AE311BE3" 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/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2F3C7F897B6430794BD77D45AE311BE3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_2F3C7F897B6430794BD77D45AE311BE3" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_2F3C7F897B6430794BD77D45AE311BE3" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_D5C1A6A41FF774BEC23E7D45AE3154D0_verboseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_D5C1A6A41FF774BEC23E7D45AE3154D0" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash flows provided by (used in) investing activities:</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_D5C1A6A41FF774BEC23E7D45AE3154D0_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_D5C1A6A41FF774BEC23E7D45AE3154D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_D5C1A6A41FF774BEC23E7D45AE3154D0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_D5C1A6A41FF774BEC23E7D45AE3154D0" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_D5C1A6A41FF774BEC23E7D45AE3154D0" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_E8C73CD80276211574967D45AE31F256_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_E8C73CD80276211574967D45AE31F256" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Acquisitions of property and equipment</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_E8C73CD80276211574967D45AE31F256_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_E8C73CD80276211574967D45AE31F256" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Property, Plant, and Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_E8C73CD80276211574967D45AE31F256" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_E8C73CD80276211574967D45AE31F256" xlink:to="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_E8C73CD80276211574967D45AE31F256" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquireIntangibleAssets_9CEE4F7D56245E4463A67D45AE310C31_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireIntangibleAssets_9CEE4F7D56245E4463A67D45AE310C31" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Acquisition of license</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireIntangibleAssets_9CEE4F7D56245E4463A67D45AE310C31_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireIntangibleAssets_9CEE4F7D56245E4463A67D45AE310C31" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Intangible Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquireIntangibleAssets" xlink:label="loc_us-gaap_PaymentsToAcquireIntangibleAssets_9CEE4F7D56245E4463A67D45AE310C31" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireIntangibleAssets_9CEE4F7D56245E4463A67D45AE310C31" xlink:to="lab_us-gaap_PaymentsToAcquireIntangibleAssets_9CEE4F7D56245E4463A67D45AE310C31" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_B7B900C05539ACE1C7667D45AE32EDBE_terseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_B7B900C05539ACE1C7667D45AE32EDBE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from the sale of EnerTech</link:label>
    <link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_B7B900C05539ACE1C7667D45AE32EDBE_label_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_B7B900C05539ACE1C7667D45AE32EDBE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for (Proceeds from) Other Investing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_B7B900C05539ACE1C7667D45AE32EDBE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_B7B900C05539ACE1C7667D45AE32EDBE" xlink:to="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_B7B900C05539ACE1C7667D45AE32EDBE" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquireRestrictedInvestments_5AE7C3EEF19879E26F787D45AE32E27B_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireRestrictedInvestments_5AE7C3EEF19879E26F787D45AE32E27B" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Restricted deposits</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireRestrictedInvestments_5AE7C3EEF19879E26F787D45AE32E27B_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireRestrictedInvestments_5AE7C3EEF19879E26F787D45AE32E27B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Restricted Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquireRestrictedInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireRestrictedInvestments_5AE7C3EEF19879E26F787D45AE32E27B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireRestrictedInvestments_5AE7C3EEF19879E26F787D45AE32E27B" xlink:to="lab_us-gaap_PaymentsToAcquireRestrictedInvestments_5AE7C3EEF19879E26F787D45AE32E27B" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromSaleOfRestrictedInvestments_C98FC174E8DB9183C3EF7D45AE3232FB_negatedLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfRestrictedInvestments_C98FC174E8DB9183C3EF7D45AE3232FB" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Release of restricted deposits</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfRestrictedInvestments_C98FC174E8DB9183C3EF7D45AE3232FB_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfRestrictedInvestments_C98FC174E8DB9183C3EF7D45AE3232FB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Restricted Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromSaleOfRestrictedInvestments" xlink:label="loc_us-gaap_ProceedsFromSaleOfRestrictedInvestments_C98FC174E8DB9183C3EF7D45AE3232FB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfRestrictedInvestments_C98FC174E8DB9183C3EF7D45AE3232FB" xlink:to="lab_us-gaap_ProceedsFromSaleOfRestrictedInvestments_C98FC174E8DB9183C3EF7D45AE3232FB" xlink:type="arc" />
    <link:label id="lab_acfn_PaymentsToAcquireCostMethodInvestments_69272BC69ACF3289B1D07D45AE326156_terseLabel_en-US" xlink:label="lab_acfn_PaymentsToAcquireCostMethodInvestments_69272BC69ACF3289B1D07D45AE326156" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment in EnerTech</link:label>
    <link:label id="lab_acfn_PaymentsToAcquireCostMethodInvestments_69272BC69ACF3289B1D07D45AE326156_label_en-US" xlink:label="lab_acfn_PaymentsToAcquireCostMethodInvestments_69272BC69ACF3289B1D07D45AE326156" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Cost Method Investments</link:label>
    <link:label id="lab_acfn_PaymentsToAcquireCostMethodInvestments_69272BC69ACF3289B1D07D45AE326156_documentation_en-US" xlink:label="lab_acfn_PaymentsToAcquireCostMethodInvestments_69272BC69ACF3289B1D07D45AE326156" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The cash outflow associated with the investment which is accounted under cost method in accordance with applicable accounting standards.</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_PaymentsToAcquireCostMethodInvestments" xlink:label="loc_acfn_PaymentsToAcquireCostMethodInvestments_69272BC69ACF3289B1D07D45AE326156" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_PaymentsToAcquireCostMethodInvestments_69272BC69ACF3289B1D07D45AE326156" xlink:to="lab_acfn_PaymentsToAcquireCostMethodInvestments_69272BC69ACF3289B1D07D45AE326156" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromPaymentsForLongTermLoansForRelatedParties_16D1D536A1D800BAB8137D45AE324BEB_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromPaymentsForLongTermLoansForRelatedParties_16D1D536A1D800BAB8137D45AE324BEB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment in and loans to GridSense prior to acquisition</link:label>
    <link:label id="lab_us-gaap_ProceedsFromPaymentsForLongTermLoansForRelatedParties_16D1D536A1D800BAB8137D45AE324BEB_label_en-US" xlink:label="lab_us-gaap_ProceedsFromPaymentsForLongTermLoansForRelatedParties_16D1D536A1D800BAB8137D45AE324BEB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Collection of (Payments to Fund) Long-term Loans to Related Parties</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromPaymentsForLongTermLoansForRelatedParties" xlink:label="loc_us-gaap_ProceedsFromPaymentsForLongTermLoansForRelatedParties_16D1D536A1D800BAB8137D45AE324BEB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromPaymentsForLongTermLoansForRelatedParties_16D1D536A1D800BAB8137D45AE324BEB" xlink:to="lab_us-gaap_ProceedsFromPaymentsForLongTermLoansForRelatedParties_16D1D536A1D800BAB8137D45AE324BEB" xlink:type="arc" />
    <link:label id="lab_acfn_ProceedsFromPaymentsForAdvancesFromCoalogixPriorToSale_95405B747C2C4B907F387D45AE32781E_terseLabel_en-US" xlink:label="lab_acfn_ProceedsFromPaymentsForAdvancesFromCoalogixPriorToSale_95405B747C2C4B907F387D45AE32781E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds From (Payments For) Advances From Coalogix Prior To Sale</link:label>
    <link:label id="lab_acfn_ProceedsFromPaymentsForAdvancesFromCoalogixPriorToSale_95405B747C2C4B907F387D45AE32781E_label_en-US" xlink:label="lab_acfn_ProceedsFromPaymentsForAdvancesFromCoalogixPriorToSale_95405B747C2C4B907F387D45AE32781E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds From (Payments For) Advances From Coalogix Prior To Sale</link:label>
    <link:label id="lab_acfn_ProceedsFromPaymentsForAdvancesFromCoalogixPriorToSale_95405B747C2C4B907F387D45AE32781E_documentation_en-US" xlink:label="lab_acfn_ProceedsFromPaymentsForAdvancesFromCoalogixPriorToSale_95405B747C2C4B907F387D45AE32781E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of cash inflow or cash outflow relating to advances from CoaLogix prior to sale during the period.</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_ProceedsFromPaymentsForAdvancesFromCoalogixPriorToSale" xlink:label="loc_acfn_ProceedsFromPaymentsForAdvancesFromCoalogixPriorToSale_95405B747C2C4B907F387D45AE32781E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_ProceedsFromPaymentsForAdvancesFromCoalogixPriorToSale_95405B747C2C4B907F387D45AE32781E" xlink:to="lab_acfn_ProceedsFromPaymentsForAdvancesFromCoalogixPriorToSale_95405B747C2C4B907F387D45AE32781E" xlink:type="arc" />
    <link:label id="lab_acfn_AmountsFundedForSeveranceAssets_CA27ED5E1BA33985148F7D45AE32F9C5_negatedLabel_en-US" xlink:label="lab_acfn_AmountsFundedForSeveranceAssets_CA27ED5E1BA33985148F7D45AE32F9C5" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Amounts funded for severance assets</link:label>
    <link:label id="lab_acfn_AmountsFundedForSeveranceAssets_CA27ED5E1BA33985148F7D45AE32F9C5_label_en-US" xlink:label="lab_acfn_AmountsFundedForSeveranceAssets_CA27ED5E1BA33985148F7D45AE32F9C5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amounts Funded for Severance Assets</link:label>
    <link:label id="lab_acfn_AmountsFundedForSeveranceAssets_CA27ED5E1BA33985148F7D45AE32F9C5_documentation_en-US" xlink:label="lab_acfn_AmountsFundedForSeveranceAssets_CA27ED5E1BA33985148F7D45AE32F9C5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cash outflow relating to the deposits made in dedictated funds in respect of employee termination benefits.</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_AmountsFundedForSeveranceAssets" xlink:label="loc_acfn_AmountsFundedForSeveranceAssets_CA27ED5E1BA33985148F7D45AE32F9C5" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates_1481CB0A82479A6BA4367D45AE32F558_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates_1481CB0A82479A6BA4367D45AE32F558" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from the sale of Coreworx debt and shares</link:label>
    <link:label id="lab_us-gaap_ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates_1481CB0A82479A6BA4367D45AE32F558_label_en-US" xlink:label="lab_us-gaap_ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates_1481CB0A82479A6BA4367D45AE32F558" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Divestiture of Businesses and Interests in Affiliates</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates_1481CB0A82479A6BA4367D45AE32F558" xlink:type="locator" />
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    <link:label id="lab_acfn_ProceedsFromSaleOfCoalogixNetOfCoalogixCash_CA5A5A6E05061346A7CF7D45AE321C2C_terseLabel_en-US" xlink:label="lab_acfn_ProceedsFromSaleOfCoalogixNetOfCoalogixCash_CA5A5A6E05061346A7CF7D45AE321C2C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from the sale of CoaLogix net of CoaLogix cash</link:label>
    <link:label id="lab_acfn_ProceedsFromSaleOfCoalogixNetOfCoalogixCash_CA5A5A6E05061346A7CF7D45AE321C2C_label_en-US" xlink:label="lab_acfn_ProceedsFromSaleOfCoalogixNetOfCoalogixCash_CA5A5A6E05061346A7CF7D45AE321C2C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from the sale of CoaLogix net of CoaLogix cash</link:label>
    <link:label id="lab_acfn_ProceedsFromSaleOfCoalogixNetOfCoalogixCash_CA5A5A6E05061346A7CF7D45AE321C2C_documentation_en-US" xlink:label="lab_acfn_ProceedsFromSaleOfCoalogixNetOfCoalogixCash_CA5A5A6E05061346A7CF7D45AE321C2C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Proceeds from the sale of CoaLogix net of CoaLogix cash</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_ProceedsFromSaleOfCoalogixNetOfCoalogixCash" xlink:label="loc_acfn_ProceedsFromSaleOfCoalogixNetOfCoalogixCash_CA5A5A6E05061346A7CF7D45AE321C2C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_ProceedsFromSaleOfCoalogixNetOfCoalogixCash_CA5A5A6E05061346A7CF7D45AE321C2C" xlink:to="lab_acfn_ProceedsFromSaleOfCoalogixNetOfCoalogixCash_CA5A5A6E05061346A7CF7D45AE321C2C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromSaleOfEquityMethodInvestments_355FD31DF5692396D34A7D45AE328F11_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfEquityMethodInvestments_355FD31DF5692396D34A7D45AE328F11" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from the sale of HangXing</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfEquityMethodInvestments_355FD31DF5692396D34A7D45AE328F11_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfEquityMethodInvestments_355FD31DF5692396D34A7D45AE328F11" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Equity Method Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromSaleOfEquityMethodInvestments" xlink:label="loc_us-gaap_ProceedsFromSaleOfEquityMethodInvestments_355FD31DF5692396D34A7D45AE328F11" xlink:type="locator" />
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    <link:label id="lab_acfn_ProceedsFromPaymentsForEscrowDepositFromCoalogixSale_23A895486E46249465A67D45AE32F1DF_terseLabel_en-US" xlink:label="lab_acfn_ProceedsFromPaymentsForEscrowDepositFromCoalogixSale_23A895486E46249465A67D45AE32F1DF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Escrow deposits from Coalogix sale</link:label>
    <link:label id="lab_acfn_ProceedsFromPaymentsForEscrowDepositFromCoalogixSale_23A895486E46249465A67D45AE32F1DF_label_en-US" xlink:label="lab_acfn_ProceedsFromPaymentsForEscrowDepositFromCoalogixSale_23A895486E46249465A67D45AE32F1DF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds From (Payments For) Escrow Deposit From Coalogix Sale</link:label>
    <link:label id="lab_acfn_ProceedsFromPaymentsForEscrowDepositFromCoalogixSale_23A895486E46249465A67D45AE32F1DF_documentation_en-US" xlink:label="lab_acfn_ProceedsFromPaymentsForEscrowDepositFromCoalogixSale_23A895486E46249465A67D45AE32F1DF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of cash inflow or outflow relating to escrow deposit from CoaLogix sale during the period.</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_ProceedsFromPaymentsForEscrowDepositFromCoalogixSale" xlink:label="loc_acfn_ProceedsFromPaymentsForEscrowDepositFromCoalogixSale_23A895486E46249465A67D45AE32F1DF" xlink:type="locator" />
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    <link:label id="lab_acfn_ReleaseOfEscrowDeposits_B7EC055F56359DB276E97D45AE327D2F_terseLabel_en-US" xlink:label="lab_acfn_ReleaseOfEscrowDeposits_B7EC055F56359DB276E97D45AE327D2F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Release of escrow deposits</link:label>
    <link:label id="lab_acfn_ReleaseOfEscrowDeposits_B7EC055F56359DB276E97D45AE327D2F_label_en-US" xlink:label="lab_acfn_ReleaseOfEscrowDeposits_B7EC055F56359DB276E97D45AE327D2F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Release of escrow deposits</link:label>
    <link:label id="lab_acfn_ReleaseOfEscrowDeposits_B7EC055F56359DB276E97D45AE327D2F_documentation_en-US" xlink:label="lab_acfn_ReleaseOfEscrowDeposits_B7EC055F56359DB276E97D45AE327D2F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Release of escrow deposits</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_ReleaseOfEscrowDeposits" xlink:label="loc_acfn_ReleaseOfEscrowDeposits_B7EC055F56359DB276E97D45AE327D2F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_ReleaseOfEscrowDeposits_B7EC055F56359DB276E97D45AE327D2F" xlink:to="lab_acfn_ReleaseOfEscrowDeposits_B7EC055F56359DB276E97D45AE327D2F" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquireShortTermInvestments_689212FD023F3923F0767D45AE3230D7_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireShortTermInvestments_689212FD023F3923F0767D45AE3230D7" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Short-term deposit</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireShortTermInvestments_689212FD023F3923F0767D45AE3230D7_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireShortTermInvestments_689212FD023F3923F0767D45AE3230D7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Short-term Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquireShortTermInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireShortTermInvestments_689212FD023F3923F0767D45AE3230D7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireShortTermInvestments_689212FD023F3923F0767D45AE3230D7" xlink:to="lab_us-gaap_PaymentsToAcquireShortTermInvestments_689212FD023F3923F0767D45AE3230D7" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromSaleOfShortTermInvestments_57474E0B5865E6908E337D45AE33AFC3_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfShortTermInvestments_57474E0B5865E6908E337D45AE33AFC3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maturity of short-term deposits</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfShortTermInvestments_57474E0B5865E6908E337D45AE33AFC3_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfShortTermInvestments_57474E0B5865E6908E337D45AE33AFC3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Short-term Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromSaleOfShortTermInvestments" xlink:label="loc_us-gaap_ProceedsFromSaleOfShortTermInvestments_57474E0B5865E6908E337D45AE33AFC3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfShortTermInvestments_57474E0B5865E6908E337D45AE33AFC3" xlink:to="lab_us-gaap_ProceedsFromSaleOfShortTermInvestments_57474E0B5865E6908E337D45AE33AFC3" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_62528D3EC2F09C3E904B7D45AE3344B4_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_62528D3EC2F09C3E904B7D45AE3344B4" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by (used in) investing activities - continuing operations</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_62528D3EC2F09C3E904B7D45AE3344B4_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_62528D3EC2F09C3E904B7D45AE3344B4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_62528D3EC2F09C3E904B7D45AE3344B4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_62528D3EC2F09C3E904B7D45AE3344B4" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_62528D3EC2F09C3E904B7D45AE3344B4" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashDivestedFromDeconsolidation_91BE8E2DDB7087BD48637D45AE333F8A_terseLabel_en-US" xlink:label="lab_us-gaap_CashDivestedFromDeconsolidation_91BE8E2DDB7087BD48637D45AE333F8A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deconsolidation of Coreworx</link:label>
    <link:label id="lab_us-gaap_CashDivestedFromDeconsolidation_91BE8E2DDB7087BD48637D45AE333F8A_label_en-US" xlink:label="lab_us-gaap_CashDivestedFromDeconsolidation_91BE8E2DDB7087BD48637D45AE333F8A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Divested from Deconsolidation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashDivestedFromDeconsolidation" xlink:label="loc_us-gaap_CashDivestedFromDeconsolidation_91BE8E2DDB7087BD48637D45AE333F8A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashDivestedFromDeconsolidation_91BE8E2DDB7087BD48637D45AE333F8A" xlink:to="lab_us-gaap_CashDivestedFromDeconsolidation_91BE8E2DDB7087BD48637D45AE333F8A" xlink:type="arc" />
    <link:label id="lab_acfn_AcquisitionOfGridsenseNetOfCashAcquired_528B299C5C80A75A10067D45AE339D4B_terseLabel_en-US" xlink:label="lab_acfn_AcquisitionOfGridsenseNetOfCashAcquired_528B299C5C80A75A10067D45AE339D4B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Acquisition of GridSense, net of cash acquired</link:label>
    <link:label id="lab_acfn_AcquisitionOfGridsenseNetOfCashAcquired_528B299C5C80A75A10067D45AE339D4B_label_en-US" xlink:label="lab_acfn_AcquisitionOfGridsenseNetOfCashAcquired_528B299C5C80A75A10067D45AE339D4B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Acquisition of GridSense, net of cash acquired</link:label>
    <link:label id="lab_acfn_AcquisitionOfGridsenseNetOfCashAcquired_528B299C5C80A75A10067D45AE339D4B_documentation_en-US" xlink:label="lab_acfn_AcquisitionOfGridsenseNetOfCashAcquired_528B299C5C80A75A10067D45AE339D4B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Acquisition of GridSense, net of cash acquired</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_AcquisitionOfGridsenseNetOfCashAcquired" xlink:label="loc_acfn_AcquisitionOfGridsenseNetOfCashAcquired_528B299C5C80A75A10067D45AE339D4B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_AcquisitionOfGridsenseNetOfCashAcquired_528B299C5C80A75A10067D45AE339D4B" xlink:to="lab_acfn_AcquisitionOfGridsenseNetOfCashAcquired_528B299C5C80A75A10067D45AE339D4B" xlink:type="arc" />
    <link:label id="lab_acfn_AcquisitionOfOmiNetOfCashAcquired_CCDA5EC3C591ACF816CA7D45AE336CED_terseLabel_en-US" xlink:label="lab_acfn_AcquisitionOfOmiNetOfCashAcquired_CCDA5EC3C591ACF816CA7D45AE336CED" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Acquisition of OMI net of cash acquired</link:label>
    <link:label id="lab_acfn_AcquisitionOfOmiNetOfCashAcquired_CCDA5EC3C591ACF816CA7D45AE336CED_label_en-US" xlink:label="lab_acfn_AcquisitionOfOmiNetOfCashAcquired_CCDA5EC3C591ACF816CA7D45AE336CED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Acquisition of OMI net of cash acquired</link:label>
    <link:label id="lab_acfn_AcquisitionOfOmiNetOfCashAcquired_CCDA5EC3C591ACF816CA7D45AE336CED_documentation_en-US" xlink:label="lab_acfn_AcquisitionOfOmiNetOfCashAcquired_CCDA5EC3C591ACF816CA7D45AE336CED" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Acquisition of OMI net of cash acquired</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_AcquisitionOfOmiNetOfCashAcquired" xlink:label="loc_acfn_AcquisitionOfOmiNetOfCashAcquired_CCDA5EC3C591ACF816CA7D45AE336CED" xlink:type="locator" />
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    <link:label id="lab_acfn_PaymentToAcquireOmnimetrixNetOfCashAcquired_532C5310D3B50612E44F7D45AE330D64_terseLabel_en-US" xlink:label="lab_acfn_PaymentToAcquireOmnimetrixNetOfCashAcquired_532C5310D3B50612E44F7D45AE330D64" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Payment to acquire OmniMetrix, net of cash acquired</link:label>
    <link:label id="lab_acfn_PaymentToAcquireOmnimetrixNetOfCashAcquired_532C5310D3B50612E44F7D45AE330D64_label_en-US" xlink:label="lab_acfn_PaymentToAcquireOmnimetrixNetOfCashAcquired_532C5310D3B50612E44F7D45AE330D64" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payment to acquire OmniMetrix, net of cash acquired</link:label>
    <link:label id="lab_acfn_PaymentToAcquireOmnimetrixNetOfCashAcquired_532C5310D3B50612E44F7D45AE330D64_documentation_en-US" xlink:label="lab_acfn_PaymentToAcquireOmnimetrixNetOfCashAcquired_532C5310D3B50612E44F7D45AE330D64" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Payment to acquire OmniMetrix, net of cash acquired</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_PaymentToAcquireOmnimetrixNetOfCashAcquired" xlink:label="loc_acfn_PaymentToAcquireOmnimetrixNetOfCashAcquired_532C5310D3B50612E44F7D45AE330D64" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_356035C969245E9570C57D45AE33B242_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_356035C969245E9570C57D45AE33B242" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities, Continuing Operations</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_356035C969245E9570C57D45AE33B242_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_356035C969245E9570C57D45AE33B242" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities, Continuing Operations</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_356035C969245E9570C57D45AE33B242" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_773C7AC75B3A88AF7BA97D45AE337FBC_verboseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_773C7AC75B3A88AF7BA97D45AE337FBC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash flows provided by (used in) financing activities:</link:label>
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    <link:label id="lab_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_EA709FCD55F0AE2EA9407D45AE339614_verboseLabel_en-US" xlink:label="lab_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_EA709FCD55F0AE2EA9407D45AE339614" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from capital raises, net of transaction costs</link:label>
    <link:label id="lab_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_EA709FCD55F0AE2EA9407D45AE339614_label_en-US" xlink:label="lab_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_EA709FCD55F0AE2EA9407D45AE339614" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sale of Stock, Consideration Received on Transaction</link:label>
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    <link:label id="lab_acfn_ExerciseOfOptionsAndWarrants_D2DDF051AEA6DC60C7D27D45AE339AB1_verboseLabel_en-US" xlink:label="lab_acfn_ExerciseOfOptionsAndWarrants_D2DDF051AEA6DC60C7D27D45AE339AB1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from employee stock option and warrant exercises</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromMinorityShareholders_35DA13AC6D4E33740C277D45AE333220_label_en-US" xlink:label="lab_us-gaap_ProceedsFromMinorityShareholders_35DA13AC6D4E33740C277D45AE333220" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Noncontrolling Interests</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromLinesOfCredit_D66D731E789B0361348B7D45AE349595_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromLinesOfCredit_D66D731E789B0361348B7D45AE349595" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-term bank credit, net</link:label>
    <link:label id="lab_us-gaap_ProceedsFromLinesOfCredit_D66D731E789B0361348B7D45AE349595_label_en-US" xlink:label="lab_us-gaap_ProceedsFromLinesOfCredit_D66D731E789B0361348B7D45AE349595" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Lines of Credit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromLinesOfCredit" xlink:label="loc_us-gaap_ProceedsFromLinesOfCredit_D66D731E789B0361348B7D45AE349595" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_153FF0C45E054185AD2A7D45AE341B83_verboseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_153FF0C45E054185AD2A7D45AE341B83" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from borrowings of long-term debt</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInDiscontinuedOperationsAbstract_F964D43061F2CD14EF0D7D45AE3431B8_verboseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInDiscontinuedOperationsAbstract_F964D43061F2CD14EF0D7D45AE3431B8" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Discontinued operations:</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInDiscontinuedOperationsAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInDiscontinuedOperationsAbstract_F964D43061F2CD14EF0D7D45AE3431B8" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations_33D743C03098E606EA797D45AE35C138" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents_DB485945F5E7BFDD40FE7D45AE353F2A_label_en-US" xlink:label="lab_us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents_DB485945F5E7BFDD40FE7D45AE353F2A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents</link:label>
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_9633D5D38B57E7BE2E5F7D45AE35008C_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_9633D5D38B57E7BE2E5F7D45AE35008C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, at Carrying Value</link:label>
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    <link:label id="lab_us-gaap_AssetImpairmentCharges_69BD7EBA8D3345158B2F7D45AE36B91E_terseLabel_en-US" xlink:label="lab_us-gaap_AssetImpairmentCharges_69BD7EBA8D3345158B2F7D45AE36B91E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impairments</link:label>
    <link:label id="lab_us-gaap_AssetImpairmentCharges_69BD7EBA8D3345158B2F7D45AE36B91E_label_en-US" xlink:label="lab_us-gaap_AssetImpairmentCharges_69BD7EBA8D3345158B2F7D45AE36B91E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Asset Impairment Charges</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetImpairmentCharges" xlink:label="loc_us-gaap_AssetImpairmentCharges_69BD7EBA8D3345158B2F7D45AE36B91E" xlink:type="locator" />
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    <link:label id="lab_us-gaap_InventoryWriteDown_AF4A3842B87F0881A7C97D45AE36525D_terseLabel_en-US" xlink:label="lab_us-gaap_InventoryWriteDown_AF4A3842B87F0881A7C97D45AE36525D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Inventory Write-down</link:label>
    <link:label id="lab_us-gaap_InventoryWriteDown_AF4A3842B87F0881A7C97D45AE36525D_label_en-US" xlink:label="lab_us-gaap_InventoryWriteDown_AF4A3842B87F0881A7C97D45AE36525D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Inventory Write-down</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryWriteDown" xlink:label="loc_us-gaap_InventoryWriteDown_AF4A3842B87F0881A7C97D45AE36525D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InventoryWriteDown_AF4A3842B87F0881A7C97D45AE36525D" xlink:to="lab_us-gaap_InventoryWriteDown_AF4A3842B87F0881A7C97D45AE36525D" xlink:type="arc" />
    <link:label id="lab_acfn_IncreaseInLiabilityForEmployeeTerminationBenefits_375BC75B2E53F1BB0BC27D45AE364C85_negatedLabel_en-US" xlink:label="lab_acfn_IncreaseInLiabilityForEmployeeTerminationBenefits_375BC75B2E53F1BB0BC27D45AE364C85" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Increase in liability for accrued severance</link:label>
    <link:label id="lab_acfn_IncreaseInLiabilityForEmployeeTerminationBenefits_375BC75B2E53F1BB0BC27D45AE364C85_label_en-US" xlink:label="lab_acfn_IncreaseInLiabilityForEmployeeTerminationBenefits_375BC75B2E53F1BB0BC27D45AE364C85" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase in Liability for Employee Termination Benefits</link:label>
    <link:label id="lab_acfn_IncreaseInLiabilityForEmployeeTerminationBenefits_375BC75B2E53F1BB0BC27D45AE364C85_documentation_en-US" xlink:label="lab_acfn_IncreaseInLiabilityForEmployeeTerminationBenefits_375BC75B2E53F1BB0BC27D45AE364C85" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Increase in liability for employee termination benefits which is recognized in accordance with certain labor law. This liability is computed based upon the employee's number of years of service and salary components, which in the opinion of management create entitlement to severance pay in accordance with labor agreements in force.</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_IncreaseInLiabilityForEmployeeTerminationBenefits" xlink:label="loc_acfn_IncreaseInLiabilityForEmployeeTerminationBenefits_375BC75B2E53F1BB0BC27D45AE364C85" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_IncreaseInLiabilityForEmployeeTerminationBenefits_375BC75B2E53F1BB0BC27D45AE364C85" xlink:to="lab_acfn_IncreaseInLiabilityForEmployeeTerminationBenefits_375BC75B2E53F1BB0BC27D45AE364C85" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss_A91924303C770F09B1007D45AE36DF8B_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss_A91924303C770F09B1007D45AE36DF8B" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Gain on investment in GridSense</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss_A91924303C770F09B1007D45AE36DF8B_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss_A91924303C770F09B1007D45AE36DF8B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (Loss), Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss" xlink:label="loc_us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss_A91924303C770F09B1007D45AE36DF8B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss_A91924303C770F09B1007D45AE36DF8B" xlink:to="lab_us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss_A91924303C770F09B1007D45AE36DF8B" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_AA595713D27FDAEBC5D27D45AE36B9FD_negatedLabel_en-US" xlink:label="lab_us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_AA595713D27FDAEBC5D27D45AE36B9FD" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Gain on sale of HangXing</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal" xlink:label="loc_us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_AA595713D27FDAEBC5D27D45AE36B9FD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_AA595713D27FDAEBC5D27D45AE36B9FD" xlink:to="lab_us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_AA595713D27FDAEBC5D27D45AE36B9FD" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensation_296F949CE775D020D62B7D45AE371F40_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_296F949CE775D020D62B7D45AE371F40" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock and stock compensation expense</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensation_296F949CE775D020D62B7D45AE371F40_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_296F949CE775D020D62B7D45AE371F40" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation</link:label>
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    <link:label id="lab_us-gaap_OtherNoncashIncomeExpense_FADD3FC68DBBF4DFD65B7D45AE375CBF_negatedLabel_en-US" xlink:label="lab_us-gaap_OtherNoncashIncomeExpense_FADD3FC68DBBF4DFD65B7D45AE375CBF" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_OtherNoncashIncomeExpense_FADD3FC68DBBF4DFD65B7D45AE375CBF_label_en-US" xlink:label="lab_us-gaap_OtherNoncashIncomeExpense_FADD3FC68DBBF4DFD65B7D45AE375CBF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Noncash Income (Expense)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_FADD3FC68DBBF4DFD65B7D45AE375CBF" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_BA0A8C11C07A62EFBDF17D45AE37F7BF_verboseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_BA0A8C11C07A62EFBDF17D45AE37F7BF" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Change in operating assets and liabilities:</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_BA0A8C11C07A62EFBDF17D45AE37F7BF_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_BA0A8C11C07A62EFBDF17D45AE37F7BF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Operating Capital [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_BA0A8C11C07A62EFBDF17D45AE37F7BF" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_FEA6D6B47DA9765124E87D45AE37761B_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_FEA6D6B47DA9765124E87D45AE37761B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Accounts Receivable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_FEA6D6B47DA9765124E87D45AE37761B" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseInUnbilledReceivables_A960E7DE430423517CCB7D45AE37F288_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInUnbilledReceivables_A960E7DE430423517CCB7D45AE37F288" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in unbilled revenue</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInUnbilledReceivables" xlink:label="loc_us-gaap_IncreaseDecreaseInUnbilledReceivables_A960E7DE430423517CCB7D45AE37F288" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_CF5BDCCBC7448D7B91067D45AE373E7C_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_CF5BDCCBC7448D7B91067D45AE373E7C" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in other current assets and other assets</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_CF5BDCCBC7448D7B91067D45AE373E7C_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_CF5BDCCBC7448D7B91067D45AE373E7C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Other Operating Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_CF5BDCCBC7448D7B91067D45AE373E7C" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_76D5420A66360E6B54BB7D45AE375693" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingLiabilities_F459B4BE1F60CF121B4F7D45AE378B85_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingLiabilities_F459B4BE1F60CF121B4F7D45AE378B85" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Operating Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingLiabilities_F459B4BE1F60CF121B4F7D45AE378B85" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_961CE33A2BAF60A61BD67D45AE37839C_verboseLabel_en-US" xlink:label="lab_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_961CE33A2BAF60A61BD67D45AE37839C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">B. Non-cash items:</link:label>
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    <link:label id="lab_acfn_AcquisitionOfOmnimetrixAbstract_18B3BFA3A2CAC72A87147D45AE383613_verboseLabel_en-US" xlink:label="lab_acfn_AcquisitionOfOmnimetrixAbstract_18B3BFA3A2CAC72A87147D45AE383613" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">C. Assets/liabilities acquired in the acquisition of USSI</link:label>
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    <link:label id="lab_acfn_PropertyPlantAndEquipmentComputerHardwareAndSoftwareGross_D4C4383D965013F1759F43AE9F0831DB_label_en-US" xlink:label="lab_acfn_PropertyPlantAndEquipmentComputerHardwareAndSoftwareGross_D4C4383D965013F1759F43AE9F0831DB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, plant and equipment - computer hardware and software, gross</link:label>
    <link:label id="lab_acfn_PropertyPlantAndEquipmentComputerHardwareAndSoftwareGross_D4C4383D965013F1759F43AE9F0831DB_documentation_en-US" xlink:label="lab_acfn_PropertyPlantAndEquipmentComputerHardwareAndSoftwareGross_D4C4383D965013F1759F43AE9F0831DB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Property, plant and equipment - computer hardware and software, gross</link:label>
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    <link:label id="lab_acfn_PropertyPlantAndEquipmentVehiclesGross_B94BCDC3BDBA9C8B215043AE9F086C8B_label_en-US" xlink:label="lab_acfn_PropertyPlantAndEquipmentVehiclesGross_B94BCDC3BDBA9C8B215043AE9F086C8B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, plant and equipment - vehicles, gross</link:label>
    <link:label id="lab_acfn_PropertyPlantAndEquipmentVehiclesGross_B94BCDC3BDBA9C8B215043AE9F086C8B_documentation_en-US" xlink:label="lab_acfn_PropertyPlantAndEquipmentVehiclesGross_B94BCDC3BDBA9C8B215043AE9F086C8B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Property, plant and equipment - vehicles, gross</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_PropertyPlantAndEquipmentVehiclesGross" xlink:label="loc_acfn_PropertyPlantAndEquipmentVehiclesGross_B94BCDC3BDBA9C8B215043AE9F086C8B" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LeaseholdImprovementsGross_A5499E6EAC8D4CF3B28643AE9F0840D4_terseLabel_en-US" xlink:label="lab_us-gaap_LeaseholdImprovementsGross_A5499E6EAC8D4CF3B28643AE9F0840D4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Leasehold Improvements, Gross</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LeaseholdImprovementsGross" xlink:label="loc_us-gaap_LeaseholdImprovementsGross_A5499E6EAC8D4CF3B28643AE9F0840D4" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentGross_EFA302CB151A9F7BEF8643AE9F087855_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentGross_EFA302CB151A9F7BEF8643AE9F087855" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_EFA302CB151A9F7BEF8643AE9F087855" xlink:type="locator" />
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    <link:label id="lab_acfn_ComputerHardwareAndSoftwareAccumulatedDepreciation_F2ABD22B1086DBA8437843AE9F08C7E9_label_en-US" xlink:label="lab_acfn_ComputerHardwareAndSoftwareAccumulatedDepreciation_F2ABD22B1086DBA8437843AE9F08C7E9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Computer hardware and software, Accumulated depreciation</link:label>
    <link:label id="lab_acfn_ComputerHardwareAndSoftwareAccumulatedDepreciation_F2ABD22B1086DBA8437843AE9F08C7E9_documentation_en-US" xlink:label="lab_acfn_ComputerHardwareAndSoftwareAccumulatedDepreciation_F2ABD22B1086DBA8437843AE9F08C7E9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Accumulated depreciation of computer hardware and software</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_ComputerHardwareAndSoftwareAccumulatedDepreciation" xlink:label="loc_acfn_ComputerHardwareAndSoftwareAccumulatedDepreciation_F2ABD22B1086DBA8437843AE9F08C7E9" xlink:type="locator" />
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    <link:label id="lab_acfn_EquipmentAccumulatedDepreciation_72B88FE58E38B5BB9C5443AE9F086CCF_terseLabel_en-US" xlink:label="lab_acfn_EquipmentAccumulatedDepreciation_72B88FE58E38B5BB9C5443AE9F086CCF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equipment, Accumulated depreciation</link:label>
    <link:label id="lab_acfn_EquipmentAccumulatedDepreciation_72B88FE58E38B5BB9C5443AE9F086CCF_label_en-US" xlink:label="lab_acfn_EquipmentAccumulatedDepreciation_72B88FE58E38B5BB9C5443AE9F086CCF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equipment, Accumulated depreciation</link:label>
    <link:label id="lab_acfn_EquipmentAccumulatedDepreciation_72B88FE58E38B5BB9C5443AE9F086CCF_documentation_en-US" xlink:label="lab_acfn_EquipmentAccumulatedDepreciation_72B88FE58E38B5BB9C5443AE9F086CCF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Accumulated depreciation of equipment</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_EquipmentAccumulatedDepreciation" xlink:label="loc_acfn_EquipmentAccumulatedDepreciation_72B88FE58E38B5BB9C5443AE9F086CCF" xlink:type="locator" />
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    <link:label id="lab_acfn_VehiclesAccumulatedDepreciation_A71DCDB53D85A2257A9C43AE9F084F77_terseLabel_en-US" xlink:label="lab_acfn_VehiclesAccumulatedDepreciation_A71DCDB53D85A2257A9C43AE9F084F77" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vehicles, Accumulated depreciation</link:label>
    <link:label id="lab_acfn_VehiclesAccumulatedDepreciation_A71DCDB53D85A2257A9C43AE9F084F77_label_en-US" xlink:label="lab_acfn_VehiclesAccumulatedDepreciation_A71DCDB53D85A2257A9C43AE9F084F77" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Vehicles, Accumulated depreciation</link:label>
    <link:label id="lab_acfn_VehiclesAccumulatedDepreciation_A71DCDB53D85A2257A9C43AE9F084F77_documentation_en-US" xlink:label="lab_acfn_VehiclesAccumulatedDepreciation_A71DCDB53D85A2257A9C43AE9F084F77" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Vehicles, Accumulated depreciation</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_VehiclesAccumulatedDepreciation" xlink:label="loc_acfn_VehiclesAccumulatedDepreciation_A71DCDB53D85A2257A9C43AE9F084F77" xlink:type="locator" />
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    <link:label id="lab_acfn_LeaseholdImprovementsAccumulatedDepreciation_AD7EA151774EC66AD82A43AE9F08879A_terseLabel_en-US" xlink:label="lab_acfn_LeaseholdImprovementsAccumulatedDepreciation_AD7EA151774EC66AD82A43AE9F08879A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Leasehold improvements, Accumulated depreciation</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_StockIssuedDuringPeriodValueTreasuryStockReissued_B9B617750D037293494868619C449D8A" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued_B9B617750D037293494868619C449D8A" xlink:type="arc" />
    <link:label id="lab_acfn_NonControllingInterestsAcquiredInAcquisition_4617838827B563A9924068619C44F173_terseLabel_en-US" xlink:label="lab_acfn_NonControllingInterestsAcquiredInAcquisition_4617838827B563A9924068619C44F173" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non Controlling Interests Acquired in Acquisition</link:label>
    <link:label id="lab_acfn_NonControllingInterestsAcquiredInAcquisition_4617838827B563A9924068619C44F173_label_en-US" xlink:label="lab_acfn_NonControllingInterestsAcquiredInAcquisition_4617838827B563A9924068619C44F173" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non Controlling Interests Acquired in Acquisition</link:label>
    <link:label id="lab_acfn_NonControllingInterestsAcquiredInAcquisition_4617838827B563A9924068619C44F173_documentation_en-US" xlink:label="lab_acfn_NonControllingInterestsAcquiredInAcquisition_4617838827B563A9924068619C44F173" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This element represents the fair value of the noncontrolling interest at the acquisition date during the entity reporting period.</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_NonControllingInterestsAcquiredInAcquisition" xlink:label="loc_acfn_NonControllingInterestsAcquiredInAcquisition_4617838827B563A9924068619C44F173" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_NonControllingInterestsAcquiredInAcquisition_4617838827B563A9924068619C44F173" xlink:to="lab_acfn_NonControllingInterestsAcquiredInAcquisition_4617838827B563A9924068619C44F173" xlink:type="arc" />
    <link:label id="lab_acfn_AdjustmentOfNonControllingInterestsFollowingExerciseOfOptionsInSubsidiary_86E75A0147CAB5592BC468619C44465E_verboseLabel_en-US" xlink:label="lab_acfn_AdjustmentOfNonControllingInterestsFollowingExerciseOfOptionsInSubsidiary_86E75A0147CAB5592BC468619C44465E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Adjustment of non-controlling interests following additional investment by the Company</link:label>
    <link:label id="lab_acfn_AdjustmentOfNonControllingInterestsFollowingExerciseOfOptionsInSubsidiary_86E75A0147CAB5592BC468619C44465E_label_en-US" xlink:label="lab_acfn_AdjustmentOfNonControllingInterestsFollowingExerciseOfOptionsInSubsidiary_86E75A0147CAB5592BC468619C44465E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustment of Non Controlling Interests Following Exercise of Options in Subsidiary</link:label>
    <link:label id="lab_acfn_AdjustmentOfNonControllingInterestsFollowingExerciseOfOptionsInSubsidiary_86E75A0147CAB5592BC468619C44465E_documentation_en-US" xlink:label="lab_acfn_AdjustmentOfNonControllingInterestsFollowingExerciseOfOptionsInSubsidiary_86E75A0147CAB5592BC468619C44465E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Adjustment of additional paid-in-capital and non-controlling from exercise of option by Entity in subsidiary.</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_AdjustmentOfNonControllingInterestsFollowingExerciseOfOptionsInSubsidiary" xlink:label="loc_acfn_AdjustmentOfNonControllingInterestsFollowingExerciseOfOptionsInSubsidiary_86E75A0147CAB5592BC468619C44465E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_AdjustmentOfNonControllingInterestsFollowingExerciseOfOptionsInSubsidiary_86E75A0147CAB5592BC468619C44465E" xlink:to="lab_acfn_AdjustmentOfNonControllingInterestsFollowingExerciseOfOptionsInSubsidiary_86E75A0147CAB5592BC468619C44465E" xlink:type="arc" />
    <link:label id="lab_acfn_SharesIssuedInDecemberCapitalRaiseNetOfTransactionCostsValue_E074DC556A571B18DBDC68619C44E52D_terseLabel_en-US" xlink:label="lab_acfn_SharesIssuedInDecemberCapitalRaiseNetOfTransactionCostsValue_E074DC556A571B18DBDC68619C44E52D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shares issued in December capital raise, net of transaction costs - value</link:label>
    <link:label id="lab_acfn_SharesIssuedInDecemberCapitalRaiseNetOfTransactionCostsValue_E074DC556A571B18DBDC68619C44E52D_label_en-US" xlink:label="lab_acfn_SharesIssuedInDecemberCapitalRaiseNetOfTransactionCostsValue_E074DC556A571B18DBDC68619C44E52D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Shares issued in December capital raise, net of transaction costs - value</link:label>
    <link:label id="lab_acfn_SharesIssuedInDecemberCapitalRaiseNetOfTransactionCostsValue_E074DC556A571B18DBDC68619C44E52D_documentation_en-US" xlink:label="lab_acfn_SharesIssuedInDecemberCapitalRaiseNetOfTransactionCostsValue_E074DC556A571B18DBDC68619C44E52D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Shares issued in December capital raise, net of transaction costs - value</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_SharesIssuedInDecemberCapitalRaiseNetOfTransactionCostsValue" xlink:label="loc_acfn_SharesIssuedInDecemberCapitalRaiseNetOfTransactionCostsValue_E074DC556A571B18DBDC68619C44E52D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_SharesIssuedInDecemberCapitalRaiseNetOfTransactionCostsValue_E074DC556A571B18DBDC68619C44E52D" xlink:to="lab_acfn_SharesIssuedInDecemberCapitalRaiseNetOfTransactionCostsValue_E074DC556A571B18DBDC68619C44E52D" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_329ADD05B2F10044090068619C44B3F6_verboseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_329ADD05B2F10044090068619C44B3F6" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Stock option compensation</link:label>
    <link:label id="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_329ADD05B2F10044090068619C44B3F6_label_en-US" xlink:label="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_329ADD05B2F10044090068619C44B3F6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_329ADD05B2F10044090068619C44B3F6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_329ADD05B2F10044090068619C44B3F6" xlink:to="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_329ADD05B2F10044090068619C44B3F6" xlink:type="arc" />
    <link:label id="lab_acfn_StockOptionCompensationOfSubsidiaries_D6E194BD0C6FFC438E7A68619C446B09_terseLabel_en-US" xlink:label="lab_acfn_StockOptionCompensationOfSubsidiaries_D6E194BD0C6FFC438E7A68619C446B09" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock Option Compensation of Subsidiaries</link:label>
    <link:label id="lab_acfn_StockOptionCompensationOfSubsidiaries_D6E194BD0C6FFC438E7A68619C446B09_label_en-US" xlink:label="lab_acfn_StockOptionCompensationOfSubsidiaries_D6E194BD0C6FFC438E7A68619C446B09" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Option Compensation of Subsidiaries</link:label>
    <link:label id="lab_acfn_StockOptionCompensationOfSubsidiaries_D6E194BD0C6FFC438E7A68619C446B09_documentation_en-US" xlink:label="lab_acfn_StockOptionCompensationOfSubsidiaries_D6E194BD0C6FFC438E7A68619C446B09" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This element represents the amount of stock compensation relating to non-controlling interest.</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_StockOptionCompensationOfSubsidiaries" xlink:label="loc_acfn_StockOptionCompensationOfSubsidiaries_D6E194BD0C6FFC438E7A68619C446B09" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_StockOptionCompensationOfSubsidiaries_D6E194BD0C6FFC438E7A68619C446B09" xlink:to="lab_acfn_StockOptionCompensationOfSubsidiaries_D6E194BD0C6FFC438E7A68619C446B09" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeconsolidationGainOrLossAmount_5C86510CBA65017CBE1768619C442C4D_terseLabel_en-US" xlink:label="lab_us-gaap_DeconsolidationGainOrLossAmount_5C86510CBA65017CBE1768619C442C4D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deconsolidation, Gain (Loss), Amount</link:label>
    <link:label id="lab_us-gaap_DeconsolidationGainOrLossAmount_5C86510CBA65017CBE1768619C442C4D_label_en-US" xlink:label="lab_us-gaap_DeconsolidationGainOrLossAmount_5C86510CBA65017CBE1768619C442C4D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deconsolidation, Gain (Loss), Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeconsolidationGainOrLossAmount" xlink:label="loc_us-gaap_DeconsolidationGainOrLossAmount_5C86510CBA65017CBE1768619C442C4D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeconsolidationGainOrLossAmount_5C86510CBA65017CBE1768619C442C4D" xlink:to="lab_us-gaap_DeconsolidationGainOrLossAmount_5C86510CBA65017CBE1768619C442C4D" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_B0F90E15A977410FA2E168619C44B121_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_B0F90E15A977410FA2E168619C44B121" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_B0F90E15A977410FA2E168619C44B121_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_B0F90E15A977410FA2E168619C44B121" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_B0F90E15A977410FA2E168619C44B121" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_B0F90E15A977410FA2E168619C44B121" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_B0F90E15A977410FA2E168619C44B121" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_ADBC5F10EE620131CC1668619C445125_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_ADBC5F10EE620131CC1668619C445125" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_ADBC5F10EE620131CC1668619C445125" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_ADBC5F10EE620131CC1668619C445125" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_ADBC5F10EE620131CC1668619C445125" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityOther_DBE06F08D91AF1B9524A68619C44139C_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityOther_DBE06F08D91AF1B9524A68619C44139C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stockholders' Equity, Other</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityOther_DBE06F08D91AF1B9524A68619C44139C_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityOther_DBE06F08D91AF1B9524A68619C44139C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity, Other</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquityOther" xlink:label="loc_us-gaap_StockholdersEquityOther_DBE06F08D91AF1B9524A68619C44139C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityOther_DBE06F08D91AF1B9524A68619C44139C" xlink:to="lab_us-gaap_StockholdersEquityOther_DBE06F08D91AF1B9524A68619C44139C" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_7C7EA53C09C23D89520968619C45FCEE_verboseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_7C7EA53C09C23D89520968619C45FCEE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Exercise of options</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_7C7EA53C09C23D89520968619C45FCEE_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_7C7EA53C09C23D89520968619C45FCEE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Value, Stock Options Exercised</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_7C7EA53C09C23D89520968619C45FCEE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_7C7EA53C09C23D89520968619C45FCEE" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_7C7EA53C09C23D89520968619C45FCEE" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_B468F256AFB134C300E668619C4582FB_verboseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_B468F256AFB134C300E668619C4582FB" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Exercised</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_B468F256AFB134C300E668619C4582FB_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_B468F256AFB134C300E668619C4582FB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_B468F256AFB134C300E668619C4582FB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_B468F256AFB134C300E668619C4582FB" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_B468F256AFB134C300E668619C4582FB" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2EEC62E73B0691BB031968619C4525E7_negatedPeriodEndLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2EEC62E73B0691BB031968619C4525E7" xlink:role="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:type="resource" xml:lang="en-US">Balances</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2EEC62E73B0691BB031968619C4525E7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2EEC62E73B0691BB031968619C4525E7" xlink:to="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2EEC62E73B0691BB031968619C4525E7" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharesOutstanding_98B538FAE00FC2E2C11868619C451CC1_periodEndLabel_en-US" xlink:label="lab_us-gaap_SharesOutstanding_98B538FAE00FC2E2C11868619C451CC1" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Balances (in shares)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SharesOutstanding" xlink:label="loc_us-gaap_SharesOutstanding_98B538FAE00FC2E2C11868619C451CC1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharesOutstanding_98B538FAE00FC2E2C11868619C451CC1" xlink:to="lab_us-gaap_SharesOutstanding_98B538FAE00FC2E2C11868619C451CC1" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_3FF426ECD423C8B9300A77CAF7C2ED7D_terseLabel_en-US" xlink:label="lab_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_3FF426ECD423C8B9300A77CAF7C2ED7D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table]</link:label>
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    <link:label id="lab_acfn_AmountAdvancedByParentCompanyInContemplationOfNewInvestmentAgreement_3CCD8A4D9ABCD24E5E1A69933CC8EFA5_terseLabel_en-US" xlink:label="lab_acfn_AmountAdvancedByParentCompanyInContemplationOfNewInvestmentAgreement_3CCD8A4D9ABCD24E5E1A69933CC8EFA5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amount advanced by parent company in contemplation of a new investment agreement</link:label>
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    <link:label id="lab_acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExerciseableNumberDsitOptionPlan_302A3915482D14904E7662B6A44B658C_verboseLabel_en-US" xlink:label="lab_acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExerciseableNumberDsitOptionPlan_302A3915482D14904E7662B6A44B658C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Exerciseable, Number - DSIT Option Plan</link:label>
    <link:label id="lab_acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExerciseableNumberDsitOptionPlan_302A3915482D14904E7662B6A44B658C_label_en-US" xlink:label="lab_acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExerciseableNumberDsitOptionPlan_302A3915482D14904E7662B6A44B658C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exerciseable, Number - DSIT Option Plan</link:label>
    <link:label id="lab_acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExerciseableNumberDsitOptionPlan_302A3915482D14904E7662B6A44B658C_documentation_en-US" xlink:label="lab_acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExerciseableNumberDsitOptionPlan_302A3915482D14904E7662B6A44B658C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exerciseable, Number - DSIT Option Plan</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExerciseableNumberDsitOptionPlan" xlink:label="loc_acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExerciseableNumberDsitOptionPlan_302A3915482D14904E7662B6A44B658C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExerciseableNumberDsitOptionPlan_302A3915482D14904E7662B6A44B658C" xlink:to="lab_acfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExerciseableNumberDsitOptionPlan_302A3915482D14904E7662B6A44B658C" xlink:type="arc" />
    <link:label id="lab_acfn_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePriceDsitOptionPlan_57FFAAF37B99B625373E62B6A44BB517_verboseLabel_en-US" xlink:label="lab_acfn_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePriceDsitOptionPlan_57FFAAF37B99B625373E62B6A44BB517" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Exercisable Options, Weighted Average Exercise Price - DSIT Option Plan</link:label>
    <link:label id="lab_acfn_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePriceDsitOptionPlan_57FFAAF37B99B625373E62B6A44BB517_label_en-US" xlink:label="lab_acfn_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePriceDsitOptionPlan_57FFAAF37B99B625373E62B6A44BB517" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price - DSIT Option Plan</link:label>
    <link:label id="lab_acfn_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePriceDsitOptionPlan_57FFAAF37B99B625373E62B6A44BB517_documentation_en-US" xlink:label="lab_acfn_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePriceDsitOptionPlan_57FFAAF37B99B625373E62B6A44BB517" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price - DSIT Option Plan</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePriceDsitOptionPlan" xlink:label="loc_acfn_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePriceDsitOptionPlan_57FFAAF37B99B625373E62B6A44BB517" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePriceDsitOptionPlan_57FFAAF37B99B625373E62B6A44BB517" xlink:to="lab_acfn_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePriceDsitOptionPlan_57FFAAF37B99B625373E62B6A44BB517" xlink:type="arc" />
    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod_EC10448F5867B95210B7439FE915125C_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod_EC10448F5867B95210B7439FE915125C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Maximum Amount Outstanding During Period</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod_EC10448F5867B95210B7439FE915125C_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod_EC10448F5867B95210B7439FE915125C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Maximum Amount Outstanding During Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod_EC10448F5867B95210B7439FE915125C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod_EC10448F5867B95210B7439FE915125C" xlink:to="lab_us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod_EC10448F5867B95210B7439FE915125C" xlink:type="arc" />
    <link:label id="lab_acfn_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriodAtEachOfTwoBanks_19FB3178460CCDA2D1C2439FE915A506_terseLabel_en-US" xlink:label="lab_acfn_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriodAtEachOfTwoBanks_19FB3178460CCDA2D1C2439FE915A506" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">line of credit facility, maximum amount outstanding during the period at each of two banks</link:label>
    <link:label id="lab_acfn_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriodAtEachOfTwoBanks_19FB3178460CCDA2D1C2439FE915A506_label_en-US" xlink:label="lab_acfn_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriodAtEachOfTwoBanks_19FB3178460CCDA2D1C2439FE915A506" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">line of credit facility, maximum amount outstanding during the period at each of two banks</link:label>
    <link:label id="lab_acfn_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriodAtEachOfTwoBanks_19FB3178460CCDA2D1C2439FE915A506_documentation_en-US" xlink:label="lab_acfn_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriodAtEachOfTwoBanks_19FB3178460CCDA2D1C2439FE915A506" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">line of credit facility, maximum amount outstanding during the period at each of two banks</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriodAtEachOfTwoBanks" xlink:label="loc_acfn_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriodAtEachOfTwoBanks_19FB3178460CCDA2D1C2439FE915A506" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriodAtEachOfTwoBanks_19FB3178460CCDA2D1C2439FE915A506" xlink:to="lab_acfn_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriodAtEachOfTwoBanks_19FB3178460CCDA2D1C2439FE915A506" xlink:type="arc" />
    <link:label id="lab_us-gaap_LineOfCreditFacilityAmountOutstanding_FB87AC96E181AB881C52439FE915550B_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityAmountOutstanding_FB87AC96E181AB881C52439FE915550B" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Amount Outstanding</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityAmountOutstanding" xlink:label="loc_us-gaap_LineOfCreditFacilityAmountOutstanding_FB87AC96E181AB881C52439FE915550B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityAmountOutstanding_FB87AC96E181AB881C52439FE915550B" xlink:to="lab_us-gaap_LineOfCreditFacilityAmountOutstanding_FB87AC96E181AB881C52439FE915550B" xlink:type="arc" />
    <link:label id="lab_acfn_InterestRateToBeAddedToPrimeRateOnLinesOfCreditBeingUsedOrOnAnotherDebt_9B3CBEBF5373821CF197439FE915C187_terseLabel_en-US" xlink:label="lab_acfn_InterestRateToBeAddedToPrimeRateOnLinesOfCreditBeingUsedOrOnAnotherDebt_9B3CBEBF5373821CF197439FE915C187" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Component of interest rate (in addition to a prime rate) on a lines of credit being used or on another debt</link:label>
    <link:label id="lab_acfn_InterestRateToBeAddedToPrimeRateOnLinesOfCreditBeingUsedOrOnAnotherDebt_9B3CBEBF5373821CF197439FE915C187_label_en-US" xlink:label="lab_acfn_InterestRateToBeAddedToPrimeRateOnLinesOfCreditBeingUsedOrOnAnotherDebt_9B3CBEBF5373821CF197439FE915C187" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest rate (to be added to a prime rate) on a lines of credit being used or on another debt</link:label>
    <link:label id="lab_acfn_InterestRateToBeAddedToPrimeRateOnLinesOfCreditBeingUsedOrOnAnotherDebt_9B3CBEBF5373821CF197439FE915C187_documentation_en-US" xlink:label="lab_acfn_InterestRateToBeAddedToPrimeRateOnLinesOfCreditBeingUsedOrOnAnotherDebt_9B3CBEBF5373821CF197439FE915C187" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest rate (to be added to a prime rate) on a lines of credit being used or on another debt</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_InterestRateToBeAddedToPrimeRateOnLinesOfCreditBeingUsedOrOnAnotherDebt" xlink:label="loc_acfn_InterestRateToBeAddedToPrimeRateOnLinesOfCreditBeingUsedOrOnAnotherDebt_9B3CBEBF5373821CF197439FE915C187" xlink:type="locator" />
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    <link:label id="lab_acfn_IsraeliPrimeRatePerAnnum_D1F114CE82D312755474439FE9151D09_terseLabel_en-US" xlink:label="lab_acfn_IsraeliPrimeRatePerAnnum_D1F114CE82D312755474439FE9151D09" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Israeli prime rate per annum</link:label>
    <link:label id="lab_acfn_IsraeliPrimeRatePerAnnum_D1F114CE82D312755474439FE9151D09_label_en-US" xlink:label="lab_acfn_IsraeliPrimeRatePerAnnum_D1F114CE82D312755474439FE9151D09" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Israeli prime rate per annum</link:label>
    <link:label id="lab_acfn_IsraeliPrimeRatePerAnnum_D1F114CE82D312755474439FE9151D09_documentation_en-US" xlink:label="lab_acfn_IsraeliPrimeRatePerAnnum_D1F114CE82D312755474439FE9151D09" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Israeli prime rate per annum</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_IsraeliPrimeRatePerAnnum" xlink:label="loc_acfn_IsraeliPrimeRatePerAnnum_D1F114CE82D312755474439FE9151D09" xlink:type="locator" />
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    <link:label id="lab_acfn_MaximumAmountThatCanBeBorrowedByGridsenseUnderItsCreditFacilityAtAnyTimeDuringPeriod_105C9605CD64A849FA6D43E5D05B6D91_terseLabel_en-US" xlink:label="lab_acfn_MaximumAmountThatCanBeBorrowedByGridsenseUnderItsCreditFacilityAtAnyTimeDuringPeriod_105C9605CD64A849FA6D43E5D05B6D91" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum amount that can be borrowed by GridSense, under its credit facility, at any time during the period.</link:label>
    <link:label id="lab_acfn_MaximumAmountThatCanBeBorrowedByGridsenseUnderItsCreditFacilityAtAnyTimeDuringPeriod_105C9605CD64A849FA6D43E5D05B6D91_label_en-US" xlink:label="lab_acfn_MaximumAmountThatCanBeBorrowedByGridsenseUnderItsCreditFacilityAtAnyTimeDuringPeriod_105C9605CD64A849FA6D43E5D05B6D91" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum amount that can be borrowed by GridSense, under its credit facility, at any time during the period.</link:label>
    <link:label id="lab_acfn_MaximumAmountThatCanBeBorrowedByGridsenseUnderItsCreditFacilityAtAnyTimeDuringPeriod_105C9605CD64A849FA6D43E5D05B6D91_documentation_en-US" xlink:label="lab_acfn_MaximumAmountThatCanBeBorrowedByGridsenseUnderItsCreditFacilityAtAnyTimeDuringPeriod_105C9605CD64A849FA6D43E5D05B6D91" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Maximum amount that can be borrowed by GridSense, under its credit facility, at any time during the period.</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_MaximumAmountThatCanBeBorrowedByGridsenseUnderItsCreditFacilityAtAnyTimeDuringPeriod" xlink:label="loc_acfn_MaximumAmountThatCanBeBorrowedByGridsenseUnderItsCreditFacilityAtAnyTimeDuringPeriod_105C9605CD64A849FA6D43E5D05B6D91" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_MaximumAmountThatCanBeBorrowedByGridsenseUnderItsCreditFacilityAtAnyTimeDuringPeriod_105C9605CD64A849FA6D43E5D05B6D91" xlink:to="lab_acfn_MaximumAmountThatCanBeBorrowedByGridsenseUnderItsCreditFacilityAtAnyTimeDuringPeriod_105C9605CD64A849FA6D43E5D05B6D91" xlink:type="arc" />
    <link:label id="lab_acfn_MaximumAmountThatCanBeBorrowedByUssiUnderItsCreditFacilityAtAnyTimeDuringPeriod_0F9AAB4F34FCE5B91120439FE924997B_terseLabel_en-US" xlink:label="lab_acfn_MaximumAmountThatCanBeBorrowedByUssiUnderItsCreditFacilityAtAnyTimeDuringPeriod_0F9AAB4F34FCE5B91120439FE924997B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum amount that can be borrowed by USSI, under its credit facility, at any time during the period.</link:label>
    <link:label id="lab_acfn_MaximumAmountThatCanBeBorrowedByUssiUnderItsCreditFacilityAtAnyTimeDuringPeriod_0F9AAB4F34FCE5B91120439FE924997B_label_en-US" xlink:label="lab_acfn_MaximumAmountThatCanBeBorrowedByUssiUnderItsCreditFacilityAtAnyTimeDuringPeriod_0F9AAB4F34FCE5B91120439FE924997B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum amount that can be borrowed by USSI, under its credit facility, at any time during the period.</link:label>
    <link:label id="lab_acfn_MaximumAmountThatCanBeBorrowedByUssiUnderItsCreditFacilityAtAnyTimeDuringPeriod_0F9AAB4F34FCE5B91120439FE924997B_documentation_en-US" xlink:label="lab_acfn_MaximumAmountThatCanBeBorrowedByUssiUnderItsCreditFacilityAtAnyTimeDuringPeriod_0F9AAB4F34FCE5B91120439FE924997B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Maximum amount that can be borrowed by USSI, under its credit facility, at any time during the period.</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_MaximumAmountThatCanBeBorrowedByUssiUnderItsCreditFacilityAtAnyTimeDuringPeriod" xlink:label="loc_acfn_MaximumAmountThatCanBeBorrowedByUssiUnderItsCreditFacilityAtAnyTimeDuringPeriod_0F9AAB4F34FCE5B91120439FE924997B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_MaximumAmountThatCanBeBorrowedByUssiUnderItsCreditFacilityAtAnyTimeDuringPeriod_0F9AAB4F34FCE5B91120439FE924997B" xlink:to="lab_acfn_MaximumAmountThatCanBeBorrowedByUssiUnderItsCreditFacilityAtAnyTimeDuringPeriod_0F9AAB4F34FCE5B91120439FE924997B" xlink:type="arc" />
    <link:label id="lab_acfn_UssiAmountBorrowed_CD9967325E2D17915708439FE9243D68_terseLabel_en-US" xlink:label="lab_acfn_UssiAmountBorrowed_CD9967325E2D17915708439FE9243D68" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">USSI, Amount borrowed</link:label>
    <link:label id="lab_acfn_UssiAmountBorrowed_CD9967325E2D17915708439FE9243D68_label_en-US" xlink:label="lab_acfn_UssiAmountBorrowed_CD9967325E2D17915708439FE9243D68" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">USSI, Amount borrowed</link:label>
    <link:label id="lab_acfn_UssiAmountBorrowed_CD9967325E2D17915708439FE9243D68_documentation_en-US" xlink:label="lab_acfn_UssiAmountBorrowed_CD9967325E2D17915708439FE9243D68" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">USSI, amount borrowed under its credit facility as of the balance sheet date.</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_UssiAmountBorrowed" xlink:label="loc_acfn_UssiAmountBorrowed_CD9967325E2D17915708439FE9243D68" xlink:type="locator" />
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    <link:label id="lab_acfn_InterestRateToBeAddedToPrimeRate_93AB6C61012E1F7AC108439FE9240422_terseLabel_en-US" xlink:label="lab_acfn_InterestRateToBeAddedToPrimeRate_93AB6C61012E1F7AC108439FE9240422" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate (to be added to a prime rate)</link:label>
    <link:label id="lab_acfn_InterestRateToBeAddedToPrimeRate_93AB6C61012E1F7AC108439FE9240422_label_en-US" xlink:label="lab_acfn_InterestRateToBeAddedToPrimeRate_93AB6C61012E1F7AC108439FE9240422" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest rate (to be added to a prime rate)</link:label>
    <link:label id="lab_acfn_InterestRateToBeAddedToPrimeRate_93AB6C61012E1F7AC108439FE9240422_documentation_en-US" xlink:label="lab_acfn_InterestRateToBeAddedToPrimeRate_93AB6C61012E1F7AC108439FE9240422" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest rate (to be added to a prime rate) on advances from the line of credit</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_InterestRateToBeAddedToPrimeRate" xlink:label="loc_acfn_InterestRateToBeAddedToPrimeRate_93AB6C61012E1F7AC108439FE9240422" xlink:type="locator" />
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    <link:label id="lab_acfn_PrimeRate_ADB650D72A60F45668B6439FE9241250_terseLabel_en-US" xlink:label="lab_acfn_PrimeRate_ADB650D72A60F45668B6439FE9241250" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Prime Rate</link:label>
    <link:label id="lab_acfn_PrimeRate_ADB650D72A60F45668B6439FE9241250_label_en-US" xlink:label="lab_acfn_PrimeRate_ADB650D72A60F45668B6439FE9241250" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Prime Rate</link:label>
    <link:label id="lab_acfn_PrimeRate_ADB650D72A60F45668B6439FE9241250_documentation_en-US" xlink:label="lab_acfn_PrimeRate_ADB650D72A60F45668B6439FE9241250" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Prime Rate</link:label>
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    <link:label id="lab_acfn_BankDebtNumberOfMonthlyPaymentsToRepayDebt_E2032760FBDF5FA41EC4439FE9246A57_terseLabel_en-US" xlink:label="lab_acfn_BankDebtNumberOfMonthlyPaymentsToRepayDebt_E2032760FBDF5FA41EC4439FE9246A57" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Bank debt, number of monthly payments to repay the debt</link:label>
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    <link:label id="lab_acfn_BankDebtNumberOfMonthlyPaymentsToRepayDebt_E2032760FBDF5FA41EC4439FE9246A57_documentation_en-US" xlink:label="lab_acfn_BankDebtNumberOfMonthlyPaymentsToRepayDebt_E2032760FBDF5FA41EC4439FE9246A57" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Bank debt, number of monthly payments to repay the debt</link:label>
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    <link:label id="lab_acfn_BankDebtMonthlyPayments_DA109E9540C798F422AE439FE924545C_label_en-US" xlink:label="lab_acfn_BankDebtMonthlyPayments_DA109E9540C798F422AE439FE924545C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Bank debt, monthly payments</link:label>
    <link:label id="lab_acfn_BankDebtMonthlyPayments_DA109E9540C798F422AE439FE924545C_documentation_en-US" xlink:label="lab_acfn_BankDebtMonthlyPayments_DA109E9540C798F422AE439FE924545C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Bank debt, monthly payments of principle and interest to repay the debt</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_BankDebtMonthlyPayments" xlink:label="loc_acfn_BankDebtMonthlyPayments_DA109E9540C798F422AE439FE924545C" xlink:type="locator" />
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    <link:label id="lab_us-gaap_SecurityDeposit_689650F191AA1061F1B6439FE924C647_terseLabel_en-US" xlink:label="lab_us-gaap_SecurityDeposit_689650F191AA1061F1B6439FE924C647" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Security Deposit</link:label>
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    <link:label id="lab_acfn_LoanReceivedFromGridsencesCeo_3ED6BD6F91D3F71DC864439FE92442D7_terseLabel_en-US" xlink:label="lab_acfn_LoanReceivedFromGridsencesCeo_3ED6BD6F91D3F71DC864439FE92442D7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loan received from GridSence's CEO</link:label>
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    <link:label id="lab_acfn_LoanReceivedFromGridsencesCeo_3ED6BD6F91D3F71DC864439FE92442D7_documentation_en-US" xlink:label="lab_acfn_LoanReceivedFromGridsencesCeo_3ED6BD6F91D3F71DC864439FE92442D7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loan received from GridSence's CEO</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_LoanReceivedFromGridsencesCeo" xlink:label="loc_acfn_LoanReceivedFromGridsencesCeo_3ED6BD6F91D3F71DC864439FE92442D7" xlink:type="locator" />
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    <link:label id="lab_acfn_LoanReceivedFromGridsenceDirector_E68B54153A7CBB235280439FE924C59F_terseLabel_en-US" xlink:label="lab_acfn_LoanReceivedFromGridsenceDirector_E68B54153A7CBB235280439FE924C59F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loan received from GridSence director</link:label>
    <link:label id="lab_acfn_LoanReceivedFromGridsenceDirector_E68B54153A7CBB235280439FE924C59F_label_en-US" xlink:label="lab_acfn_LoanReceivedFromGridsenceDirector_E68B54153A7CBB235280439FE924C59F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loan received from GridSence director</link:label>
    <link:label id="lab_acfn_LoanReceivedFromGridsenceDirector_E68B54153A7CBB235280439FE924C59F_documentation_en-US" xlink:label="lab_acfn_LoanReceivedFromGridsenceDirector_E68B54153A7CBB235280439FE924C59F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loan received from GridSence director</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_LoanReceivedFromGridsenceDirector" xlink:label="loc_acfn_LoanReceivedFromGridsenceDirector_E68B54153A7CBB235280439FE924C59F" xlink:type="locator" />
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    <link:label id="lab_us-gaap_RepaymentsOfOtherDebt_CB5B5A1782B6F8DE2858439FE9246AA2_terseLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfOtherDebt_CB5B5A1782B6F8DE2858439FE9246AA2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Repayments of Other Debt</link:label>
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    <link:label id="lab_acfn_AmountOfPrincipleRepaidFromRelatedPartyDebt_7B19251D2C0455A51DF9439FE924DE22_terseLabel_en-US" xlink:label="lab_acfn_AmountOfPrincipleRepaidFromRelatedPartyDebt_7B19251D2C0455A51DF9439FE924DE22" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amount of principle repaid from related party debt</link:label>
    <link:label id="lab_acfn_AmountOfPrincipleRepaidFromRelatedPartyDebt_7B19251D2C0455A51DF9439FE924DE22_label_en-US" xlink:label="lab_acfn_AmountOfPrincipleRepaidFromRelatedPartyDebt_7B19251D2C0455A51DF9439FE924DE22" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amount of principle repaid from related party debt</link:label>
    <link:label id="lab_acfn_AmountOfPrincipleRepaidFromRelatedPartyDebt_7B19251D2C0455A51DF9439FE924DE22_documentation_en-US" xlink:label="lab_acfn_AmountOfPrincipleRepaidFromRelatedPartyDebt_7B19251D2C0455A51DF9439FE924DE22" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of principle repaid from related party debt</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_780017551C513A6D82A77D45AE816C9E" xlink:type="locator" />
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    <link:label id="lab_us-gaap_MajorCustomersAxis_9100F6CAB1FCD54D580662B6A3FD33DE_terseLabel_en-US" xlink:label="lab_us-gaap_MajorCustomersAxis_9100F6CAB1FCD54D580662B6A3FD33DE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Major Customers [Axis]</link:label>
    <link:label id="lab_us-gaap_MajorCustomersAxis_9100F6CAB1FCD54D580662B6A3FD33DE_label_en-US" xlink:label="lab_us-gaap_MajorCustomersAxis_9100F6CAB1FCD54D580662B6A3FD33DE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Major Customers [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MajorCustomersAxis" xlink:label="loc_us-gaap_MajorCustomersAxis_9100F6CAB1FCD54D580662B6A3FD33DE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MajorCustomersAxis_9100F6CAB1FCD54D580662B6A3FD33DE" xlink:to="lab_us-gaap_MajorCustomersAxis_9100F6CAB1FCD54D580662B6A3FD33DE" xlink:type="arc" />
    <link:label id="lab_us-gaap_NameOfMajorCustomerDomain_02B36253574CC9AC7ADB62B6A3FD01B4_terseLabel_en-US" xlink:label="lab_us-gaap_NameOfMajorCustomerDomain_02B36253574CC9AC7ADB62B6A3FD01B4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Name of Major Customer [Domain]</link:label>
    <link:label id="lab_us-gaap_NameOfMajorCustomerDomain_02B36253574CC9AC7ADB62B6A3FD01B4_label_en-US" xlink:label="lab_us-gaap_NameOfMajorCustomerDomain_02B36253574CC9AC7ADB62B6A3FD01B4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Name of Major Customer [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NameOfMajorCustomerDomain" xlink:label="loc_us-gaap_NameOfMajorCustomerDomain_02B36253574CC9AC7ADB62B6A3FD01B4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NameOfMajorCustomerDomain_02B36253574CC9AC7ADB62B6A3FD01B4" xlink:to="lab_us-gaap_NameOfMajorCustomerDomain_02B36253574CC9AC7ADB62B6A3FD01B4" xlink:type="arc" />
    <link:label id="lab_acfn_CustomerMember_1938F010A634E2A0158B62B6A3FDE718_terseLabel_en-US" xlink:label="lab_acfn_CustomerMember_1938F010A634E2A0158B62B6A3FDE718" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer A [Member]</link:label>
    <link:label id="lab_acfn_CustomerMember_1938F010A634E2A0158B62B6A3FDE718_label_en-US" xlink:label="lab_acfn_CustomerMember_1938F010A634E2A0158B62B6A3FDE718" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer A [Member]</link:label>
    <link:label id="lab_acfn_CustomerMember_1938F010A634E2A0158B62B6A3FDE718_documentation_en-US" xlink:label="lab_acfn_CustomerMember_1938F010A634E2A0158B62B6A3FDE718" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Customer A [Member]</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_CustomerMember" xlink:label="loc_acfn_CustomerMember_1938F010A634E2A0158B62B6A3FDE718" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_CustomerMember_1938F010A634E2A0158B62B6A3FDE718" xlink:to="lab_acfn_CustomerMember_1938F010A634E2A0158B62B6A3FDE718" xlink:type="arc" />
    <link:label id="lab_acfn_CustomerBMember_96B258FADFA6442FC40D62B6A3FD5612_terseLabel_en-US" xlink:label="lab_acfn_CustomerBMember_96B258FADFA6442FC40D62B6A3FD5612" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer B [Member]</link:label>
    <link:label id="lab_acfn_CustomerBMember_96B258FADFA6442FC40D62B6A3FD5612_label_en-US" xlink:label="lab_acfn_CustomerBMember_96B258FADFA6442FC40D62B6A3FD5612" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer B [Member]</link:label>
    <link:label id="lab_acfn_CustomerBMember_96B258FADFA6442FC40D62B6A3FD5612_documentation_en-US" xlink:label="lab_acfn_CustomerBMember_96B258FADFA6442FC40D62B6A3FD5612" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Customer B [Member]</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_CustomerBMember" xlink:label="loc_acfn_CustomerBMember_96B258FADFA6442FC40D62B6A3FD5612" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_CustomerBMember_96B258FADFA6442FC40D62B6A3FD5612" xlink:to="lab_acfn_CustomerBMember_96B258FADFA6442FC40D62B6A3FD5612" xlink:type="arc" />
    <link:label id="lab_acfn_CustomerCMember_31372001FCD55AF56BE662B6A3FD1441_terseLabel_en-US" xlink:label="lab_acfn_CustomerCMember_31372001FCD55AF56BE662B6A3FD1441" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer C [Member]</link:label>
    <link:label id="lab_acfn_CustomerCMember_31372001FCD55AF56BE662B6A3FD1441_label_en-US" xlink:label="lab_acfn_CustomerCMember_31372001FCD55AF56BE662B6A3FD1441" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer C [Member]</link:label>
    <link:label id="lab_acfn_CustomerCMember_31372001FCD55AF56BE662B6A3FD1441_documentation_en-US" xlink:label="lab_acfn_CustomerCMember_31372001FCD55AF56BE662B6A3FD1441" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Customer C [Member]</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_CustomerCMember" xlink:label="loc_acfn_CustomerCMember_31372001FCD55AF56BE662B6A3FD1441" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_CustomerCMember_31372001FCD55AF56BE662B6A3FD1441" xlink:to="lab_acfn_CustomerCMember_31372001FCD55AF56BE662B6A3FD1441" xlink:type="arc" />
    <link:label id="lab_acfn_CustomerDMember_52ED0D53C9112ED6920C62B6A3FD5E61_terseLabel_en-US" xlink:label="lab_acfn_CustomerDMember_52ED0D53C9112ED6920C62B6A3FD5E61" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer D [Member]</link:label>
    <link:label id="lab_acfn_CustomerDMember_52ED0D53C9112ED6920C62B6A3FD5E61_label_en-US" xlink:label="lab_acfn_CustomerDMember_52ED0D53C9112ED6920C62B6A3FD5E61" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer D [Member]</link:label>
    <link:label id="lab_acfn_CustomerDMember_52ED0D53C9112ED6920C62B6A3FD5E61_documentation_en-US" xlink:label="lab_acfn_CustomerDMember_52ED0D53C9112ED6920C62B6A3FD5E61" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Customer D [Member]</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_CustomerDMember" xlink:label="loc_acfn_CustomerDMember_52ED0D53C9112ED6920C62B6A3FD5E61" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_CustomerDMember_52ED0D53C9112ED6920C62B6A3FD5E61" xlink:to="lab_acfn_CustomerDMember_52ED0D53C9112ED6920C62B6A3FD5E61" xlink:type="arc" />
    <link:label id="lab_acfn_CustomerEMember_6B636BD72A8F9D98F1BE62B6A3FDB28E_terseLabel_en-US" xlink:label="lab_acfn_CustomerEMember_6B636BD72A8F9D98F1BE62B6A3FDB28E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer E [Member]</link:label>
    <link:label id="lab_acfn_CustomerEMember_6B636BD72A8F9D98F1BE62B6A3FDB28E_label_en-US" xlink:label="lab_acfn_CustomerEMember_6B636BD72A8F9D98F1BE62B6A3FDB28E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer E [Member]</link:label>
    <link:label id="lab_acfn_CustomerEMember_6B636BD72A8F9D98F1BE62B6A3FDB28E_documentation_en-US" xlink:label="lab_acfn_CustomerEMember_6B636BD72A8F9D98F1BE62B6A3FDB28E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Customer E [Member]</link:label>
    <link:loc xlink:href="acfn-20121231.xsd#acfn_CustomerEMember" xlink:label="loc_acfn_CustomerEMember_6B636BD72A8F9D98F1BE62B6A3FDB28E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_acfn_CustomerEMember_6B636BD72A8F9D98F1BE62B6A3FDB28E" xlink:to="lab_acfn_CustomerEMember_6B636BD72A8F9D98F1BE62B6A3FDB28E" xlink:type="arc" />
    <link:label id="lab_us-gaap_EntityWideRevenueMajorCustomerLineItems_B393AA0E3470564BA5FB62B6A3FD7624_terseLabel_en-US" xlink:label="lab_us-gaap_EntityWideRevenueMajorCustomerLineItems_B393AA0E3470564BA5FB62B6A3FD7624" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revenue, Major Customer [Line Items]</link:label>
    <link:label id="lab_us-gaap_EntityWideRevenueMajorCustomerLineItems_B393AA0E3470564BA5FB62B6A3FD7624_label_en-US" xlink:label="lab_us-gaap_EntityWideRevenueMajorCustomerLineItems_B393AA0E3470564BA5FB62B6A3FD7624" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue, Major Customer [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EntityWideRevenueMajorCustomerLineItems" xlink:label="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_B393AA0E3470564BA5FB62B6A3FD7624" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_B393AA0E3470564BA5FB62B6A3FD7624" xlink:to="lab_us-gaap_EntityWideRevenueMajorCustomerLineItems_B393AA0E3470564BA5FB62B6A3FD7624" xlink:type="arc" />
    <link:label id="lab_us-gaap_SalesRevenueNet_304086E65305AB6FCD2D62B6A3FD3616_verboseLabel_en-US" xlink:label="lab_us-gaap_SalesRevenueNet_304086E65305AB6FCD2D62B6A3FD3616" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Revenues</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SalesRevenueNet" xlink:label="loc_us-gaap_SalesRevenueNet_304086E65305AB6FCD2D62B6A3FD3616" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SalesRevenueNet_304086E65305AB6FCD2D62B6A3FD3616" xlink:to="lab_us-gaap_SalesRevenueNet_304086E65305AB6FCD2D62B6A3FD3616" xlink:type="arc" />
    <link:label id="lab_us-gaap_EntityWideRevenueMajorCustomerPercentage_001B4F1D2EDE60A0FC0A62B6A3FD05E5_terseLabel_en-US" xlink:label="lab_us-gaap_EntityWideRevenueMajorCustomerPercentage_001B4F1D2EDE60A0FC0A62B6A3FD05E5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percent of total revenues</link:label>
    <link:label id="lab_us-gaap_EntityWideRevenueMajorCustomerPercentage_001B4F1D2EDE60A0FC0A62B6A3FD05E5_label_en-US" xlink:label="lab_us-gaap_EntityWideRevenueMajorCustomerPercentage_001B4F1D2EDE60A0FC0A62B6A3FD05E5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity-Wide Revenue, Major Customer, Percentage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EntityWideRevenueMajorCustomerPercentage" xlink:label="loc_us-gaap_EntityWideRevenueMajorCustomerPercentage_001B4F1D2EDE60A0FC0A62B6A3FD05E5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerPercentage_001B4F1D2EDE60A0FC0A62B6A3FD05E5" xlink:to="lab_us-gaap_EntityWideRevenueMajorCustomerPercentage_001B4F1D2EDE60A0FC0A62B6A3FD05E5" xlink:type="arc" />
    <link:label id="lab_acfn_NatureOfOperationsAbstract_95548F97CF78347045A3F638ED86B895_label_en-US" xlink:label="lab_acfn_NatureOfOperationsAbstract_95548F97CF78347045A3F638ED86B895" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NATURE OF OPERATIONS [Abstract]</link:label>
    <link:label id="lab_acfn_NatureOfOperationsAbstract_95548F97CF78347045A3F638ED86B895_documentation_en-US" xlink:label="lab_acfn_NatureOfOperationsAbstract_95548F97CF78347045A3F638ED86B895" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">NATURE OF OPERATIONS [Abstract]</link:label>
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    <link:label id="lab_us-gaap_NatureOfOperations_D335A4E982DB752A976CF63938474708_terseLabel_en-US" xlink:label="lab_us-gaap_NatureOfOperations_D335A4E982DB752A976CF63938474708" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Nature of Operations [Text Block]</link:label>
    <link:label id="lab_us-gaap_NatureOfOperations_D335A4E982DB752A976CF63938474708_label_en-US" xlink:label="lab_us-gaap_NatureOfOperations_D335A4E982DB752A976CF63938474708" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Nature of Operations [Text Block]</link:label>
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    <link:label id="lab_acfn_ConsiderationPaidInAcquisition_E269F6B0040D25850D134FBA23FB1B1E_terseLabel_en-US" xlink:label="lab_acfn_ConsiderationPaidInAcquisition_E269F6B0040D25850D134FBA23FB1B1E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consideration Paid in Acquisition</link:label>
    <link:label id="lab_acfn_ConsiderationPaidInAcquisition_E269F6B0040D25850D134FBA23FB1B1E_label_en-US" xlink:label="lab_acfn_ConsiderationPaidInAcquisition_E269F6B0040D25850D134FBA23FB1B1E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consideration Paid in Acquisition</link:label>
    <link:label id="lab_acfn_ConsiderationPaidInAcquisition_E269F6B0040D25850D134FBA23FB1B1E_documentation_en-US" xlink:label="lab_acfn_ConsiderationPaidInAcquisition_E269F6B0040D25850D134FBA23FB1B1E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount paid for consideration acquired in the acquisition during the period.</link:label>
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    <link:label id="lab_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_CA63844409002D15999777D09DAD6590_terseLabel_en-US" xlink:label="lab_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_CA63844409002D15999777D09DAD6590" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Warrants and Rights Outstanding</link:label>
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    <link:label id="lab_acfn_PercentageOfCoreworxCurrentCommonStockOutstandingRepresentedByWarrantGrantedToAcorn_6371285E68A8C392F69F77D09DADA7E9_terseLabel_en-US" xlink:label="lab_acfn_PercentageOfCoreworxCurrentCommonStockOutstandingRepresentedByWarrantGrantedToAcorn_6371285E68A8C392F69F77D09DADA7E9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of USSI current common stock outstanding represented by the warrant granted to Acorn.</link:label>
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    <link:label id="lab_acfn_PercentageOfCoreworxGrossRevenuesThatCoreworxWouldPayAcornAsRoyaltyFeeFollowingRepaymentOfCoreworxDebtToAcorn_5AEB1FFF46640636412977D09DAD0C0A_terseLabel_en-US" xlink:label="lab_acfn_PercentageOfCoreworxGrossRevenuesThatCoreworxWouldPayAcornAsRoyaltyFeeFollowingRepaymentOfCoreworxDebtToAcorn_5AEB1FFF46640636412977D09DAD0C0A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of Coreworx&#8217; gross revenues that Coreworx would pay Acorn as a royalty fee, following the repayment of Coreworx debt to Acorn.</link:label>
    <link:label id="lab_acfn_PercentageOfCoreworxGrossRevenuesThatCoreworxWouldPayAcornAsRoyaltyFeeFollowingRepaymentOfCoreworxDebtToAcorn_5AEB1FFF46640636412977D09DAD0C0A_label_en-US" xlink:label="lab_acfn_PercentageOfCoreworxGrossRevenuesThatCoreworxWouldPayAcornAsRoyaltyFeeFollowingRepaymentOfCoreworxDebtToAcorn_5AEB1FFF46640636412977D09DAD0C0A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage of Coreworx&#8217; gross revenues that Coreworx would pay Acorn as a royalty fee, following the repayment of Coreworx debt to Acorn.</link:label>
    <link:label id="lab_acfn_PercentageOfCoreworxGrossRevenuesThatCoreworxWouldPayAcornAsRoyaltyFeeFollowingRepaymentOfCoreworxDebtToAcorn_5AEB1FFF46640636412977D09DAD0C0A_documentation_en-US" xlink:label="lab_acfn_PercentageOfCoreworxGrossRevenuesThatCoreworxWouldPayAcornAsRoyaltyFeeFollowingRepaymentOfCoreworxDebtToAcorn_5AEB1FFF46640636412977D09DAD0C0A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage of Coreworx&#8217; gross revenues that Coreworx would pay Acorn as a royalty fee, following the repayment of Coreworx debt to Acorn, as stipulated in Coreworx sale agreement.</link:label>
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    <link:label id="lab_acfn_MaximumAmountOfRoyaltyFeeThatCoreworxWouldPayAcornFollowingRepaymentOfCoreworxDebtToAcornAsStipulatedInCoreworxSaleAgreement_E23E9B3041C14E725A3E77D09DADC944_terseLabel_en-US" xlink:label="lab_acfn_MaximumAmountOfRoyaltyFeeThatCoreworxWouldPayAcornFollowingRepaymentOfCoreworxDebtToAcornAsStipulatedInCoreworxSaleAgreement_E23E9B3041C14E725A3E77D09DADC944" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum amount of royalty fee that Coreworx would pay Acorn, following repayment of the Coreworx debt to Acorn, as stipulated in Coreworx sale agreement.</link:label>
    <link:label id="lab_acfn_MaximumAmountOfRoyaltyFeeThatCoreworxWouldPayAcornFollowingRepaymentOfCoreworxDebtToAcornAsStipulatedInCoreworxSaleAgreement_E23E9B3041C14E725A3E77D09DADC944_label_en-US" xlink:label="lab_acfn_MaximumAmountOfRoyaltyFeeThatCoreworxWouldPayAcornFollowingRepaymentOfCoreworxDebtToAcornAsStipulatedInCoreworxSaleAgreement_E23E9B3041C14E725A3E77D09DADC944" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum amount of royalty fee that Coreworx would pay Acorn, following repayment of the Coreworx debt to Acorn, as stipulated in Coreworx sale agreement.</link:label>
    <link:label id="lab_acfn_MaximumAmountOfRoyaltyFeeThatCoreworxWouldPayAcornFollowingRepaymentOfCoreworxDebtToAcornAsStipulatedInCoreworxSaleAgreement_E23E9B3041C14E725A3E77D09DADC944_documentation_en-US" xlink:label="lab_acfn_MaximumAmountOfRoyaltyFeeThatCoreworxWouldPayAcornFollowingRepaymentOfCoreworxDebtToAcornAsStipulatedInCoreworxSaleAgreement_E23E9B3041C14E725A3E77D09DADC944" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Maximum amount of royalty fee that Coreworx would pay Acorn, following repayment of the Coreworx debt to Acorn, as stipulated in Coreworx sale agreement.</link:label>
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    <link:label id="lab_acfn_AmountOfRestructuringFeeThatCoreworxShallPayToAcorn_4A52314CE35E4EF79E7D77D09DAD7EFC_terseLabel_en-US" xlink:label="lab_acfn_AmountOfRestructuringFeeThatCoreworxShallPayToAcorn_4A52314CE35E4EF79E7D77D09DAD7EFC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amount of restructuring fee that Coreworx shall pay to Acorn</link:label>
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    <link:label id="lab_acfn_AmountOfRestructuringFeeThatCoreworxShallPayToAcorn_4A52314CE35E4EF79E7D77D09DAD7EFC_documentation_en-US" xlink:label="lab_acfn_AmountOfRestructuringFeeThatCoreworxShallPayToAcorn_4A52314CE35E4EF79E7D77D09DAD7EFC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of restructuring fee that Coreworx shall pay to Acorn</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets_00800EF9A7CF7D69154C77D09DAD819A_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets_00800EF9A7CF7D69154C77D09DAD819A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from Sales of Business, Affiliate and Productive Assets</link:label>
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    <link:label id="lab_us-gaap_GainsLossesOnSalesOfAssets_4DC2CDD4864BF5AA697A77D09DAD3AFC_terseLabel_en-US" xlink:label="lab_us-gaap_GainsLossesOnSalesOfAssets_4DC2CDD4864BF5AA697A77D09DAD3AFC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gains (Losses) on Sales of Assets</link:label>
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    <link:label id="lab_acfn_ThisElementRepresentsApplicableAmountOfIncomeTaxesOrBenefitRealizedOnGainLossOnSaleOfInvestmentsOrOtherAssetsDuringReportingPeriod_580D576683487629D85277D09DAD627D_terseLabel_en-US" xlink:label="lab_acfn_ThisElementRepresentsApplicableAmountOfIncomeTaxesOrBenefitRealizedOnGainLossOnSaleOfInvestmentsOrOtherAssetsDuringReportingPeriod_580D576683487629D85277D09DAD627D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">This element represents the applicable amount of income taxes or benefit realized on the gain (loss) on sale of investments or other assets during the reporting period.</link:label>
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    <link:label id="lab_us-gaap_GainLossOnSaleOfStockInSubsidiaryOrEquityMethodInvestee_4ADA020E79340126D0BF77D09DADE872_terseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfStockInSubsidiaryOrEquityMethodInvestee_4ADA020E79340126D0BF77D09DADE872" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Sale of Stock in Subsidiary or Equity Method Investee</link:label>
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