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  <xsd:element id="fcel_TaxEquityFinancingCommitment" name="TaxEquityFinancingCommitment" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element name="AgreementTypeAxis" id="fcel_AgreementTypeAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AgreementTypeDomain" id="fcel_AgreementTypeDomain" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SegmentInformationAbstract" id="fcel_SegmentInformationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ProjectAssetsBopAndSiteConstructionMember" id="fcel_ProjectAssetsBopAndSiteConstructionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ProjectAssetsModulesMember" id="fcel_ProjectAssetsModulesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NoncashReclassificationBetweenInventoryAndProjectAssets" id="fcel_NoncashReclassificationBetweenInventoryAndProjectAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="RevenuesByGeographicAreaTableTextBlock" id="fcel_RevenuesByGeographicAreaTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ProceedsFromIssuanceOfCommonStockIssuedForStockPlansAndRelatedExpenses" id="fcel_ProceedsFromIssuanceOfCommonStockIssuedForStockPlansAndRelatedExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="GrotonProjectMember" id="fcel_GrotonProjectMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PowerPurchaseAgreementMember" id="fcel_PowerPurchaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="LongIslandPowerAuthorityProjectMember" id="fcel_LongIslandPowerAuthorityProjectMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CtRfp2Derby14.9MegaWattProjectMember" id="fcel_CtRfp2Derby14.9MegaWattProjectMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TermForProcuringFuelUnderPowerPurchaseAgreement" id="fcel_TermForProcuringFuelUnderPowerPurchaseAgreement" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ToyotaProjectMember" id="fcel_ToyotaProjectMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="LongTermProjectAssetsNetExcludingConstructionInProgress" id="fcel_LongTermProjectAssetsNetExcludingConstructionInProgress" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="TaxEquityFinancingTransactionWithReiFor7.4MwFuelCellProjectMember" id="fcel_TaxEquityFinancingTransactionWithReiFor7.4MwFuelCellProjectMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TaxEquityFinancingCommitmentAmountOfDistribution" id="fcel_TaxEquityFinancingCommitmentAmountOfDistribution" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DerbyProject14.0MegaWattMember" id="fcel_DerbyProject14.0MegaWattMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DerbyProject2.8MegaWattMember" id="fcel_DerbyProject2.8MegaWattMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TwoZeroTwoTwoOpenMarketSaleAgreementMember" id="fcel_TwoZeroTwoTwoOpenMarketSaleAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="JefferiesLlcB.rileySecuritiesBarclaysCapitalIncBmocorpBofaSecuritiesCanacordGenuityLlcCitigroupGlobalMarketsIncJ.p.morganSecuritiesLlcAndLoopCapitalMarketsLlcMember" id="fcel_JefferiesLlcB.rileySecuritiesBarclaysCapitalIncBmocorpBofaSecuritiesCanacordGenuityLlcCitigroupGlobalMarketsIncJ.p.morganSecuritiesLlcAndLoopCapitalMarketsLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ShareBasedCompensationArrangementAwardCapPercent" id="fcel_ShareBasedCompensationArrangementAwardCapPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="SeniorManagementMember" id="fcel_SeniorManagementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SalariedEmployeesMember" id="fcel_SalariedEmployeesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PercentageOfTargetPerformance" id="fcel_PercentageOfTargetPerformance" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="CommonStockCapitalSharesReservedForFutureIssuancePercent" id="fcel_CommonStockCapitalSharesReservedForFutureIssuancePercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="DerbyProjectMember" id="fcel_DerbyProjectMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OpcoFinancingFacilityMember" id="fcel_OpcoFinancingFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DebtServiceAndPerformanceReservesRelatedToFinancingFacility" id="fcel_DebtServiceAndPerformanceReservesRelatedToFinancingFacility" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="NetProceedsFromIssuanceOfLineOfCredit" id="fcel_NetProceedsFromIssuanceOfLineOfCredit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ConnecticutGreenBankLoanGrotonBackLeverageFinancingMember" id="fcel_ConnecticutGreenBankLoanGrotonBackLeverageFinancingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AmalgamatedBankLoanGrotonBackLeverageFinancingMember" id="fcel_AmalgamatedBankLoanGrotonBackLeverageFinancingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ContributionsReceivedForSaleOfNoncontrollingInterest" id="fcel_ContributionsReceivedForSaleOfNoncontrollingInterest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AccruedPerformanceObligation" id="fcel_AccruedPerformanceObligation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="TaxEquityFinancingsAndInvestmentTaxCreditSaleAbstract" id="fcel_TaxEquityFinancingsAndInvestmentTaxCreditSaleAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="FranklinParkTaxEquityFinancingTransactionsMember" id="fcel_FranklinParkTaxEquityFinancingTransactionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ToyotaInvestmentTaxCreditSaleTransactionMember" id="fcel_ToyotaInvestmentTaxCreditSaleTransactionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ProceedsFromSaleOfInvestmentTaxCredit" id="fcel_ProceedsFromSaleOfInvestmentTaxCredit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DebtServiceAndPerformanceReservesRelatedToLeverageLoanFacilities" id="fcel_DebtServiceAndPerformanceReservesRelatedToLeverageLoanFacilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="LIPYaphankProjectMember" id="fcel_LIPYaphankProjectMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TermOfHydrogenProductionAndPowerPurchaseAgreement" id="fcel_TermOfHydrogenProductionAndPowerPurchaseAgreement" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ConnecticutGreenBankTermLoanDerbySeniorBackLeverageLoanFacilityMember" id="fcel_ConnecticutGreenBankTermLoanDerbySeniorBackLeverageLoanFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ConnecticutGreenBankLoanDerbySubordinatedBackLeverageLoanFacilityMember" id="fcel_ConnecticutGreenBankLoanDerbySubordinatedBackLeverageLoanFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="LibertyBankTermLoanAgreementGrotonSeniorBackLeverageLoanFacilityMember" id="fcel_LibertyBankTermLoanAgreementGrotonSeniorBackLeverageLoanFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AggregateRemainingOfferingPrice" id="fcel_AggregateRemainingOfferingPrice" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AmendedOpenMarketSalesAgreement2022Member" id="fcel_AmendedOpenMarketSalesAgreement2022Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TechnicalImprovementPlanContributions" id="fcel_TechnicalImprovementPlanContributions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="TulareBiomatProjectMember" id="fcel_TulareBiomatProjectMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DerivativeGainLossNetSettlement" id="fcel_DerivativeGainLossNetSettlement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DebtInstrumentCovenantMinimumCashBalance" id="fcel_DebtInstrumentCovenantMinimumCashBalance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="TaxEquityFinancingsAndInvestmentTaxCreditSaleDisclosureTextBlock" id="fcel_TaxEquityFinancingsAndInvestmentTaxCreditSaleDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PaymentsOfStockIssuanceCostsSalesCommission" id="fcel_PaymentsOfStockIssuanceCostsSalesCommission" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PaymentsOfStockIssuanceCostsFees" id="fcel_PaymentsOfStockIssuanceCostsFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ShareBasedCompensationNumberOfAwardComponents" id="fcel_ShareBasedCompensationNumberOfAwardComponents" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="September2024RestructuringMember" id="fcel_September2024RestructuringMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="November2024RestructuringMember" id="fcel_November2024RestructuringMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="June2025RestructuringMember" id="fcel_June2025RestructuringMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="StockholdersEquityAndWarrantLiabilitiesTable" id="fcel_StockholdersEquityAndWarrantLiabilitiesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="StockholdersEquityAndWarrantLiabilitiesLineItems" id="fcel_StockholdersEquityAndWarrantLiabilitiesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="JefferiesLlcBRileySecuritiesIncBarclaysCapitalIncBmoCapitalMarketsCorpBofaSecuritiesIncCanacordGenuityLlcCitigroupGlobalMarketsIncAndLoopCapitalMarketsLlcMember" id="fcel_JefferiesLlcBRileySecuritiesIncBarclaysCapitalIncBmoCapitalMarketsCorpBofaSecuritiesIncCanacordGenuityLlcCitigroupGlobalMarketsIncAndLoopCapitalMarketsLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CashRestrictedForNoeulGreenEnergyCo.Ltd." id="fcel_CashRestrictedForNoeulGreenEnergyCo.Ltd." type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="CashRestrictedFor2025EximFacility" id="fcel_CashRestrictedFor2025EximFacility" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ExportImportBankOfUnitedStates2025FinancingFacilityMember" id="fcel_ExportImportBankOfUnitedStates2025FinancingFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ExportImportBankOfUnitedStates2024FinancingFacilityMember" id="fcel_ExportImportBankOfUnitedStates2024FinancingFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AbsoluteTotalShareholderReturnPerformanceShareUnitsMember" id="fcel_AbsoluteTotalShareholderReturnPerformanceShareUnitsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PercentageOfTargetPerformanceShareAllocatedToPerformancePeriod" id="fcel_PercentageOfTargetPerformanceShareAllocatedToPerformancePeriod" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PerformanceSharesAllocatedFromNovember12025ThroughOctober312026Member" id="fcel_PerformanceSharesAllocatedFromNovember12025ThroughOctober312026Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PerformanceSharesAllocatedFromNovember12025ThroughOctober312027Member" id="fcel_PerformanceSharesAllocatedFromNovember12025ThroughOctober312027Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PerformanceSharesAllocatedFromNovember12025ThroughOctober312028Member" id="fcel_PerformanceSharesAllocatedFromNovember12025ThroughOctober312028Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AnnualizedTotalShareholderReturnToEarnPerformanceShareUnits" id="fcel_AnnualizedTotalShareholderReturnToEarnPerformanceShareUnits" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AchievementOf20AnnualizedTotalShareholderReturnToEarn50OfPerformanceShareUnitsMember" id="fcel_AchievementOf20AnnualizedTotalShareholderReturnToEarn50OfPerformanceShareUnitsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PercentageOfTargetPerformanceShareUnitsEarned" id="fcel_PercentageOfTargetPerformanceShareUnitsEarned" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AchievementOf35AnnualizedTotalShareholderReturnToEarn100OfPerformanceShareUnitsMember" id="fcel_AchievementOf35AnnualizedTotalShareholderReturnToEarn100OfPerformanceShareUnitsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AchievementOf50AnnualizedTotalShareholderReturnToEarn235OfPerformanceShareUnitsMember" id="fcel_AchievementOf50AnnualizedTotalShareholderReturnToEarn235OfPerformanceShareUnitsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="LongTermProjectAssetsImpairmentCharges" id="fcel_LongTermProjectAssetsImpairmentCharges" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="GrotonSeniorBackLeverageCreditAgreementMember" id="fcel_GrotonSeniorBackLeverageCreditAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DepositedIntoPaymentReserveAccount" id="fcel_DepositedIntoPaymentReserveAccount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
</xsd:schema>
