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    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition" xlink:label="loc_ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition" />
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    <link:label xlink:type="resource" xlink:label="label_ifrs-full_CashFlowsFromUsedInOperatingActivities" xml:lang="pt" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Fluxos de caixa de (utilizados em) atividades de exploração</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:label="loc_ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities" />
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:label="loc_ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" />
    <link:label xlink:type="resource" xlink:label="label_ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xml:lang="pt" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Compra de ativos intangíveis, classificados como atividades de investimento</link:label>
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    <link:label xlink:type="resource" xlink:label="label_ifrs-full_CashFlowsFromUsedInInvestingActivities" xml:lang="pt" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Fluxos de caixa de (utilizados em) atividades de investimento</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:label="loc_ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" />
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_InterestPaidClassifiedAsFinancingActivities" xlink:label="loc_ifrs-full_InterestPaidClassifiedAsFinancingActivities" />
    <link:label xlink:type="resource" xlink:label="label_ifrs-full_InterestPaidClassifiedAsFinancingActivities" xml:lang="pt" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Juros pagos, classificados como atividades de financiamento</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:label="loc_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" />
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_DividendsPaidClassifiedAsFinancingActivities" xlink:label="loc_ifrs-full_DividendsPaidClassifiedAsFinancingActivities" />
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    <link:label xlink:type="resource" xlink:label="label_ifrs-full_CashFlowsFromUsedInFinancingActivities" xml:lang="pt" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Fluxos de caixa de (utilizados em) atividades de financiamento</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:label="loc_ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" />
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    <link:label xlink:type="resource" xlink:label="label_REN_TradeAndOtherNonCurrentReceivables" xml:lang="pt" xlink:role="http://www.xbrl.org/2003/role/label">Clientes e outras contas a receber não corrente</link:label>
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    <link:label xlink:type="resource" xlink:label="label_REN_TradeAndOtherReceivablesCurrent" xml:lang="pt" xlink:role="http://www.xbrl.org/2003/role/label">Clientes e outras contas a receber corrente</link:label>
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    <link:loc xlink:type="locator" xlink:href="009892-2025-12-31.xsd#REN_OtherChangesInEquity" xlink:label="loc_REN_OtherChangesInEquity" />
    <link:label xlink:type="resource" xlink:label="label_REN_OtherChangesInEquity" xml:lang="pt" xlink:role="http://www.xbrl.org/2003/role/label">Outras variações de Capital</link:label>
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    <link:loc xlink:type="locator" xlink:href="009892-2025-12-31.xsd#REN_TradeAndOtherNonCurrentPayables" xlink:label="loc_REN_TradeAndOtherNonCurrentPayables" />
    <link:label xlink:type="resource" xlink:label="label_REN_TradeAndOtherNonCurrentPayables" xml:lang="pt" xlink:role="http://www.xbrl.org/2003/role/label">Fornecedores e outras contas a pagar não corrente</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_REN_TradeAndOtherNonCurrentPayables" xlink:to="label_REN_TradeAndOtherNonCurrentPayables" />
    <link:loc xlink:type="locator" xlink:href="009892-2025-12-31.xsd#REN_TradeAndOtherPayablesCurrent" xlink:label="loc_REN_TradeAndOtherPayablesCurrent" />
    <link:label xlink:type="resource" xlink:label="label_REN_TradeAndOtherPayablesCurrent" xml:lang="pt" xlink:role="http://www.xbrl.org/2003/role/label">Fornecedores e outras contas a pagar corrente</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_REN_TradeAndOtherPayablesCurrent" xlink:to="label_REN_TradeAndOtherPayablesCurrent" />
    <link:loc xlink:type="locator" xlink:href="009892-2025-12-31.xsd#REN_LiabilityRelatedToTheTransitionalGasPriceStabilizationRegimeDecreeLaw84D2022" xlink:label="loc_REN_LiabilityRelatedToTheTransitionalGasPriceStabilizationRegimeDecreeLaw84D2022" />
    <link:label xlink:type="resource" xlink:label="label_REN_LiabilityRelatedToTheTransitionalGasPriceStabilizationRegimeDecreeLaw84D2022" xml:lang="pt" xlink:role="http://www.xbrl.org/2003/role/label">Passivo relativo ao regime transitório de estabilização de preços do gás - Decreto-Lei n.º 84-D/2022</link:label>
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    <link:loc xlink:type="locator" xlink:href="009892-2025-12-31.xsd#REN_ProfitAndLossBeforeTaxesAndEsecAbstract" xlink:label="loc_REN_ProfitAndLossBeforeTaxesAndEsecAbstract" />
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    <link:label xlink:type="resource" xlink:label="label_REN_ProfitAndLossBeforeTaxesAndEsecAbstract2" xml:lang="pt" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Lucros (perdas) antes dos impostos</link:label>
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    <link:loc xlink:type="locator" xlink:href="009892-2025-12-31.xsd#REN_ProfitAndLossBeforeTaxesAndEsec" xlink:label="loc_REN_ProfitAndLossBeforeTaxesAndEsec" />
    <link:label xlink:type="resource" xlink:label="label_REN_ProfitAndLossBeforeTaxesAndEsec" xml:lang="pt" xlink:role="http://www.xbrl.org/2003/role/label">Resultado antes de impostos e Cese</link:label>
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    <link:loc xlink:type="locator" xlink:href="009892-2025-12-31.xsd#REN_EnergySectorExtraordinaryContribution" xlink:label="loc_REN_EnergySectorExtraordinaryContribution" />
    <link:label xlink:type="resource" xlink:label="label_REN_EnergySectorExtraordinaryContribution" xml:lang="pt" xlink:role="http://www.xbrl.org/2003/role/label">Contribuição extraordinária para o setor energético</link:label>
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_REN_EnergySectorExtraordinaryContribution" xlink:to="label_REN_EnergySectorExtraordinaryContribution2" />
    <link:loc xlink:type="locator" xlink:href="009892-2025-12-31.xsd#REN_ProfitLossAbstract1" xlink:label="loc_REN_ProfitLossAbstract1" />
    <link:label xlink:type="resource" xlink:label="label_REN_ProfitLossAbstract1" xml:lang="pt" xlink:role="http://www.xbrl.org/2003/role/label">Lucros (perdas)</link:label>
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    <link:label xlink:type="resource" xlink:label="label_REN_ProfitLossAbstract12" xml:lang="pt" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Lucros (perdas)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_REN_ProfitLossAbstract1" xlink:to="label_REN_ProfitLossAbstract12" />
    <link:loc xlink:type="locator" xlink:href="009892-2025-12-31.xsd#REN_OtherChangesInEquityMember" xlink:label="loc_REN_OtherChangesInEquityMember" />
    <link:label xlink:type="resource" xlink:label="label_REN_OtherChangesInEquityMember" xml:lang="pt" xlink:role="http://www.xbrl.org/2003/role/label">Outras Variações de Capital [membro]</link:label>
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    <link:loc xlink:type="locator" xlink:href="009892-2025-12-31.xsd#REN_ChangesInCashAndCashEquivalentsIfDifferentFromStatementOfFinancialPositionAbstract" xlink:label="loc_REN_ChangesInCashAndCashEquivalentsIfDifferentFromStatementOfFinancialPositionAbstract" />
    <link:label xlink:type="resource" xlink:label="label_REN_ChangesInCashAndCashEquivalentsIfDifferentFromStatementOfFinancialPositionAbstract" xml:lang="pt" xlink:role="http://www.xbrl.org/2003/role/label">(Changes in) Caixa e equivalentes de caixa se diferentes da demonstração da posição financeira</link:label>
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    <link:loc xlink:type="locator" xlink:href="009892-2025-12-31.xsd#REN_IncreaseDecreaseInCashAndCashEquivalentsAbstract" xlink:label="loc_REN_IncreaseDecreaseInCashAndCashEquivalentsAbstract" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_REN_IncreaseDecreaseInCashAndCashEquivalentsAbstract" xlink:to="label_REN_IncreaseDecreaseInCashAndCashEquivalentsAbstract" />
    <link:loc xlink:type="locator" xlink:href="009892-2025-12-31.xsd#REN_InterestReceivedClassifiedAsFinancingActivities" xlink:label="loc_REN_InterestReceivedClassifiedAsFinancingActivities" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_REN_InterestReceivedClassifiedAsFinancingActivities" xlink:to="label_REN_InterestReceivedClassifiedAsFinancingActivities" />
    <link:loc xlink:type="locator" xlink:href="009892-2025-12-31.xsd#REN_PaymentsOfLeaseInterests" xlink:label="loc_REN_PaymentsOfLeaseInterests" />
    <link:label xlink:type="resource" xlink:label="label_REN_PaymentsOfLeaseInterests" xml:lang="pt" xlink:role="http://www.xbrl.org/2003/role/label">Pagamentos de juros de locações financeiras</link:label>
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    <link:label xlink:type="resource" xlink:label="label_REN_PaymentsOfLeaseInterests2" xml:lang="pt" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Pagamentos de juros de locações financeiras</link:label>
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    <link:loc xlink:type="locator" xlink:href="009892-2025-12-31.xsd#REN_TheTransitionalGasPriceStabilizationRegimeDecreeLaw84D2022" xlink:label="loc_REN_TheTransitionalGasPriceStabilizationRegimeDecreeLaw84D2022" />
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    <link:label xlink:type="resource" xlink:label="label_REN_ComprehensiveIncomeAbstract2" xml:lang="pt" xlink:role="http://www.xbrl.org/2003/role/label">Rendimento integral</link:label>
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