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        <link:definition>000052 - Disclosure - Trade and Other payables (Details 1)</link:definition>
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        <link:definition>000053 - Disclosure - Working Capital Facilities (Details)</link:definition>
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      <link:roleType roleURI="http://elva.com/role/WorkingCapitalFacilitiesDetails1" id="WorkingCapitalFacilitiesDetails1">
        <link:definition>000054 - Disclosure - Working Capital Facilities (Details 1)</link:definition>
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        <link:definition>000056 - Disclosure - Finance costs (Details)</link:definition>
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        <link:definition>000057 - Disclosure - Lease liability (Details)</link:definition>
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        <link:definition>000058 - Disclosure - Lease liability (Details 1)</link:definition>
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        <link:definition>000059 - Disclosure - Lease liability (Details 2)</link:definition>
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      <link:roleType roleURI="http://elva.com/role/LeaseLiabilityDetailsNarrative" id="LeaseLiabilityDetailsNarrative">
        <link:definition>000060 - Disclosure - Lease liability (Details Narrative)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://elva.com/role/ShareCapitalDetails" id="ShareCapitalDetails">
        <link:definition>000061 - Disclosure - Share capital (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://elva.com/role/ShareCapitalDetails1" id="ShareCapitalDetails1">
        <link:definition>000062 - Disclosure - Share capital (Details 1)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://elva.com/role/ShareCapitalDetails2" id="ShareCapitalDetails2">
        <link:definition>000063 - Disclosure - Share capital (Details 2)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://elva.com/role/ShareCapitalDetails3" id="ShareCapitalDetails3">
        <link:definition>000064 - Disclosure - Share capital (Details 3)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://elva.com/role/ShareCapitalDetailsNarrrative" id="ShareCapitalDetailsNarrrative">
        <link:definition>000065 - Disclosure - Share capital (Details Narrrative)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://elva.com/role/RelatedPartyTransactionsDetails" id="RelatedPartyTransactionsDetails">
        <link:definition>000066 - Disclosure - Related Party Transactions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://elva.com/role/RelatedPartyTransactionsDetailsNarrative" id="RelatedPartyTransactionsDetailsNarrative">
        <link:definition>000067 - Disclosure - Related Party Transactions (Details Narrative)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://elva.com/role/ChangeInNonCashOperatingWorkingCapitalDetails" id="ChangeInNonCashOperatingWorkingCapitalDetails">
        <link:definition>000068 - Disclosure - Change in Non-Cash Operating Working Capital (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://elva.com/role/FinancialInstrumentsDetails" id="FinancialInstrumentsDetails">
        <link:definition>000069 - Disclosure - Financial Instruments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://elva.com/role/FinancialInstrumentsDetailsNarrative" id="FinancialInstrumentsDetailsNarrative">
        <link:definition>000070 - Disclosure - Financial Instruments (Details Narrative)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://elva.com/role/ContingenciesDetailsNarrative" id="ContingenciesDetailsNarrative">
        <link:definition>000071 - Disclosure - Contingencies (Details Narrative)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://elva.com/role/SegmentAndCustomerReportingDetails" id="SegmentAndCustomerReportingDetails">
        <link:definition>000072 - Disclosure - Segment and Customer Reporting (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://elva.com/role/SegmentAndCustomerReportingDetails1" id="SegmentAndCustomerReportingDetails1">
        <link:definition>000073 - Disclosure - Segment and Customer Reporting (Details 1)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://elva.com/role/SegmentAndCustomerReportingDetails2" id="SegmentAndCustomerReportingDetails2">
        <link:definition>000074 - Disclosure - Segment and Customer Reporting (Details 2)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://elva.com/role/OtherPayablesDetails" id="OtherPayablesDetails">
        <link:definition>000075 - Disclosure - Other payables (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://elva.com/role/OtherPayablesDetails1" id="OtherPayablesDetails1">
        <link:definition>000076 - Disclosure - Other payables (Details 1)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://elva.com/role/IncomeTaxDetails" id="IncomeTaxDetails">
        <link:definition>000077 - Disclosure - Income tax (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://elva.com/role/IncomeTaxDetailsNarrative" id="IncomeTaxDetailsNarrative">
        <link:definition>000078 - Disclosure - Income tax (Details Narrative)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://elva.com/role/SubsequentEventsDetailsNarrative" id="SubsequentEventsDetailsNarrative">
        <link:definition>000079 - Disclosure - Subsequent events (Details Narrative)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:linkbaseRef xlink:type="simple" xlink:href="elva-20260630_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
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  <element id="elva_DisclosureOfDetailedInformationAboutPrepaidExpensesExplanatory" name="DisclosureOfDetailedInformationAboutPrepaidExpensesExplanatory" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureOfDetailedInformationAboutTradeAndOtherPayablesExplanatory" name="DisclosureOfDetailedInformationAboutTradeAndOtherPayablesExplanatory" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureOfDetailedInformationAboutWarrantyProvisionsExplanatory" name="DisclosureOfDetailedInformationAboutWarrantyProvisionsExplanatory" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureOfDetailedInformationAboutRevolvingCreditFacilityExplanatory" name="DisclosureOfDetailedInformationAboutRevolvingCreditFacilityExplanatory" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureOfDetailedInformationAboutDebtFromExportImportBankExplanatory" name="DisclosureOfDetailedInformationAboutDebtFromExportImportBankExplanatory" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
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  <element id="elva_DisclosureOfDetailedInformationAboutAuthorizedAndIssuedCapitalStockExplanatory" name="DisclosureOfDetailedInformationAboutAuthorizedAndIssuedCapitalStockExplanatory" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
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  <element id="elva_DisclosureOfDetailedInformationAboutChangesInDebtForRepaymentExplanatory" name="DisclosureOfDetailedInformationAboutChangesInDebtForRepaymentExplanatory" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureOfDetailedInformationAboutFuturePaymentsOfDebtExplanatory" name="DisclosureOfDetailedInformationAboutFuturePaymentsOfDebtExplanatory" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureOfDetailedInformationAboutIncomeTaxExplanatory" name="DisclosureOfDetailedInformationAboutIncomeTaxExplanatory" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_TradeReceivablesGross" name="TradeReceivablesGross" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_AccumulatedImpairmentLossesOnTradeReceivables" name="AccumulatedImpairmentLossesOnTradeReceivables" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_AccountsReceivableInPercentage" name="AccountsReceivableInPercentage" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_GrossTradeReceivable" name="GrossTradeReceivable" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ExpectedLossRate" name="ExpectedLossRate" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ExpectedLossProvision" name="ExpectedLossProvision" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_WriteOffsOfLossAllowance" name="WriteOffsOfLossAllowance" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_AllowanceProvided" name="AllowanceProvided" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_SemiFinishedGoods" name="SemiFinishedGoods" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_PrepaidInsuranceNet" name="PrepaidInsuranceNet" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_PrepaidPurchasesExpenses" name="PrepaidPurchasesExpenses" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DepositsForEquipment" name="DepositsForEquipment" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_CapitalPurchaseCommitments" name="CapitalPurchaseCommitments" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_AdditionsDuringTheYear" name="AdditionsDuringTheYear" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisposalsInvestmentsProperty" name="DisposalsInvestmentsProperty" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DepreciationAndImpairmentBalanceAtBeginning" name="DepreciationAndImpairmentBalanceAtBeginning" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DepreciationAndImpairmentDisposals" name="DepreciationAndImpairmentDisposals" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ExchangeDifferences" name="ExchangeDifferences" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DepreciationAndImpairmentBalanceAtEnding" name="DepreciationAndImpairmentBalanceAtEnding" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_InterestOnRevolvingCreditFacilityBeginningBalance" name="InterestOnRevolvingCreditFacilityBeginningBalance" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ExchangeDifference" name="ExchangeDifference" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_PaymentsMadeDuringTheYear" name="PaymentsMadeDuringTheYear" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_LoanFees" name="LoanFees" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_CashDrawnDuringTheYear" name="CashDrawnDuringTheYear" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_InterestOnRevolvingCreditFacilityEndingBalance" name="InterestOnRevolvingCreditFacilityEndingBalance" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_AmountDrawnUnderRevolvingCreditFacilityOpeningBalance" name="AmountDrawnUnderRevolvingCreditFacilityOpeningBalance" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_LoanAmountWithdrawnDuringTheYear" name="LoanAmountWithdrawnDuringTheYear" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DebtIssuanceCost" name="DebtIssuanceCost" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_InterestAndAccretionOnExportImport" name="InterestAndAccretionOnExportImport" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_AmountDrawnUnderRevolvingCreditFacilityClosingBalance" name="AmountDrawnUnderRevolvingCreditFacilityClosingBalance" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_MaximumFundsAvailable" name="MaximumFundsAvailable" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_BalanceUnderTheFacility" name="BalanceUnderTheFacility" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_MaximumPrincipalAmount" name="MaximumPrincipalAmount" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_AmountOfPotentialIncreaseInBorrowingCapacityAccordion" name="AmountOfPotentialIncreaseInBorrowingCapacityAccordion" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_LoanFeesCapitalized" name="LoanFeesCapitalized" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_WorkingCapitalFacility" name="WorkingCapitalFacility" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_SettlementFeeOnPromissoryNote" name="SettlementFeeOnPromissoryNote" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_InterestOnVtbLoan" name="InterestOnVtbLoan" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_LeaseInterest" name="LeaseInterest" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_EquityIssuanceCosts" name="EquityIssuanceCosts" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ChangesInFvOfDerivativeWarrants" name="ChangesInFvOfDerivativeWarrants" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_AccretionOnGovernmentAssistance" name="AccretionOnGovernmentAssistance" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_CashAndNonCashFinanceCosts" name="CashAndNonCashFinanceCosts" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_NonCashFinanceCosts" name="NonCashFinanceCosts" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_CashFinanceCosts" name="CashFinanceCosts" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_CarryingAmountLeaseLiability" name="CarryingAmountLeaseLiability" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_CapitalisationRateOfBorrowingsCostsEligibleForCapitalisation" name="CapitalisationRateOfBorrowingsCostsEligibleForCapitalisation" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_MinimumLeasePaymentsReceivableUnderNoncancellableOperatingLeaseFirstYear" name="MinimumLeasePaymentsReceivableUnderNoncancellableOperatingLeaseFirstYear" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_MinimumLeasePaymentsReceivableUnderNoncancellableOperatingLeaseSecondYear" name="MinimumLeasePaymentsReceivableUnderNoncancellableOperatingLeaseSecondYear" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_MinimumLeasePaymentsReceivableUnderNoncancellableOperatingLeaseThirdYear" name="MinimumLeasePaymentsReceivableUnderNoncancellableOperatingLeaseThirdYear" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_MinimumLeasePaymentsReceivableUnderNoncancellableOperatingLeaseFourYear" name="MinimumLeasePaymentsReceivableUnderNoncancellableOperatingLeaseFourYear" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_IssuanceOfSharesCapital" name="IssuanceOfSharesCapital" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_IssuanceOfSharesOneAmount" name="IssuanceOfSharesOneAmount" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_IssuanceOfSharesOneShare" name="IssuanceOfSharesOneShare" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ExerciseOfWarrantsOneAmount" name="ExerciseOfWarrantsOneAmount" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ExerciseOfWarrantsOneShare" name="ExerciseOfWarrantsOneShare" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ExerciseOfOptionsOneAmount" name="ExerciseOfOptionsOneAmount" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ExerciseOfOptionsOneShare" name="ExerciseOfOptionsOneShare" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_TransferFromContributedSurplusOne" name="TransferFromContributedSurplusOne" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_IssuanceOfShares" name="IssuanceOfShares" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_WeightedAverageExercisePrice" name="WeightedAverageExercisePrice" nillable="true" xbrli:periodType="instant" type="num:perShareItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_NumberOfOutstandingExercised" name="NumberOfOutstandingExercised" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_WeightedAverageExercisePriceExercised" name="WeightedAverageExercisePriceExercised" nillable="true" xbrli:periodType="duration" type="num:perShareItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_NumberOfOutstandingExpired" name="NumberOfOutstandingExpired" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_WeightedAverageExercisePriceExpired" name="WeightedAverageExercisePriceExpired" nillable="true" xbrli:periodType="duration" type="num:perShareItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_NumberOfOutstandingGranted" name="NumberOfOutstandingGranted" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_WeightedAverageExercisePriceGranted" name="WeightedAverageExercisePriceGranted" nillable="true" xbrli:periodType="duration" type="num:perShareItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_NumberOfExercisable" name="NumberOfExercisable" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions" name="WeightedAverageRemainingContractualLifeOfOutstandingShareOptions" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_WarrantContinityAmount" name="WarrantContinityAmount" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_WarrantExercised" name="WarrantExercised" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_FairValueWarrantExercised" name="FairValueWarrantExercised" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_FairValueAdjustment" name="FairValueAdjustment" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_WarrantContinuityAmount" name="WarrantContinuityAmount" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DescriptionRelatedToShareCapitalPlan" name="DescriptionRelatedToShareCapitalPlan" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_CommonStockSharesIssued" name="CommonStockSharesIssued" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ShareIssuedPricePerShare" name="ShareIssuedPricePerShare" nillable="true" xbrli:periodType="instant" type="num:perShareItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_IncreaseStockOptionIncreasedShares" name="IncreaseStockOptionIncreasedShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_IncreaseOptionOutstanding" name="IncreaseOptionOutstanding" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_WarrantIssuedShares" name="WarrantIssuedShares" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_RiskFreeInterestRatePercentage" name="RiskFreeInterestRatePercentage" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ExpectedVolatilityRate" name="ExpectedVolatilityRate" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ExpectedWarrantLife" name="ExpectedWarrantLife" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_CompensationExpense" name="CompensationExpense" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_StockOptionIncreasedShares" name="StockOptionIncreasedShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_OptionOutstanding" name="OptionOutstanding" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_KeyManagementPersonnelCompensations" name="KeyManagementPersonnelCompensations" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_OptionGrantedShares" name="OptionGrantedShares" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_VestedOptionShares" name="VestedOptionShares" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_VestedOptionOneShares" name="VestedOptionOneShares" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_IncreaseDecreaseInWorkingCapitalNet" name="IncreaseDecreaseInWorkingCapitalNet" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ExpectedLifeOfWarrants" name="ExpectedLifeOfWarrants" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_AnnualDividendYieldPercentage" name="AnnualDividendYieldPercentage" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_PercentageOfEntityRevenue" name="PercentageOfEntityRevenue" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ConcentrationRiskPercentageAccountsReceivable" name="ConcentrationRiskPercentageAccountsReceivable" nillable="true" xbrli:periodType="instant" type="num:percentItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_FairValueOfWarrants" name="FairValueOfWarrants" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_FairValueStockPrice" name="FairValueStockPrice" nillable="true" xbrli:periodType="duration" type="num:perShareItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisputeRegardingFundingAndFulfilment" name="DisputeRegardingFundingAndFulfilment" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_LargeFormatBatteries" name="LargeFormatBatteries" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_Other" name="Other" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_TotalOfLargeFormatBatteries" name="TotalOfLargeFormatBatteries" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_SaleOfBatteriesAndBatterySystems" name="SaleOfBatteriesAndBatterySystems" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_SaleOfServices" name="SaleOfServices" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_OthersOne" name="OthersOne" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_TotalOfRevenueWithCustomers" name="TotalOfRevenueWithCustomers" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_RevenuesAttributed" name="RevenuesAttributed" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_OthersRevenuesAttributed" name="OthersRevenuesAttributed" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_TotalOfRevenuesAttributed" name="TotalOfRevenuesAttributed" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_OpeningOtherPayableNonCurrentLiabilities" name="OpeningOtherPayableNonCurrentLiabilities" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_InterestAccretionAmountChangesForRepayment" name="InterestAccretionAmountChangesForRepayment" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ForeignExchangeGainLossAmountChangesForRepayment" name="ForeignExchangeGainLossAmountChangesForRepayment" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DebtExtinguishment" name="DebtExtinguishment" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_EndingOtherPayableNonCurrentLiabilities" name="EndingOtherPayableNonCurrentLiabilities" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_OtherPayableNonCurrentLiabilities" name="OtherPayableNonCurrentLiabilities" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ProvisionAmountRepaymentSchedulePeriodYearOne" name="ProvisionAmountRepaymentSchedulePeriodYearOne" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ProvisionAmountRepaymentSchedulePeriodYearTwo" name="ProvisionAmountRepaymentSchedulePeriodYearTwo" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ProvisionAmountRepaymentSchedulePeriodYearThree" name="ProvisionAmountRepaymentSchedulePeriodYearThree" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ProvisionAmountRepaymentSchedulePeriodYearFour" name="ProvisionAmountRepaymentSchedulePeriodYearFour" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ProvisionAmountRepaymentSchedulePeriodYearFive" name="ProvisionAmountRepaymentSchedulePeriodYearFive" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ProvisionAmountRepaymentSchedulePeriodYearSix" name="ProvisionAmountRepaymentSchedulePeriodYearSix" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_IncomeLossBeforeIncomeTaxesPaid" name="IncomeLossBeforeIncomeTaxesPaid" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ExpectedIncomeTaxExpenseRecoveryBasedOnStatutoryRate" name="ExpectedIncomeTaxExpenseRecoveryBasedOnStatutoryRate" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ReductionInIncomeTaxRecoveryResultingFromAbstract" name="ReductionInIncomeTaxRecoveryResultingFromAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_OtherProvisionForIncomeTax" name="OtherProvisionForIncomeTax" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_TaxEffectOnShareIssueCostsAllocatedToEquity" name="TaxEffectOnShareIssueCostsAllocatedToEquity" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_ExpiryOfLosses" name="ExpiryOfLosses" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DeferredTaxBenefitsPreviouslyUnrecognised" name="DeferredTaxBenefitsPreviouslyUnrecognised" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_EffectiveIncomeTaxRate" name="EffectiveIncomeTaxRate" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" name="EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_NumberOfWarrantsVested" name="NumberOfWarrantsVested" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_cumulativePurchasesWarrants" name="cumulativePurchasesWarrants" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DateOfWarrantsExpire" name="DateOfWarrantsExpire" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureReportingEntityAbstract" name="DisclosureReportingEntityAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureBasisOfPresentationAbstract" name="DisclosureBasisOfPresentationAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_MaterialAccountingPoliciesAbstract" name="MaterialAccountingPoliciesAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureTradeAndOtherReceivablesAbstract" name="DisclosureTradeAndOtherReceivablesAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureInventoriesAbstract" name="DisclosureInventoriesAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosurePrepaidExpensesAbstract" name="DisclosurePrepaidExpensesAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosurePropertyPlantAndEquipmentAbstract" name="DisclosurePropertyPlantAndEquipmentAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureTradeAndOtherPayablesAbstract" name="DisclosureTradeAndOtherPayablesAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureOfWorkingCapitalFacilitiesAbstract" name="DisclosureOfWorkingCapitalFacilitiesAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureFinanceCostsAbstract" name="DisclosureFinanceCostsAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureLeaseLiabilityAbstract" name="DisclosureLeaseLiabilityAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureShareCapitalAbstract" name="DisclosureShareCapitalAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureRelatedPartyTransactionsAbstract" name="DisclosureRelatedPartyTransactionsAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureChangeInNoncashOperatingWorkingCapitalAbstract" name="DisclosureChangeInNoncashOperatingWorkingCapitalAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureFinancialInstrumentsAbstract" name="DisclosureFinancialInstrumentsAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureContingenciesAbstract" name="DisclosureContingenciesAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureSegmentAndCustomerReportingAbstract" name="DisclosureSegmentAndCustomerReportingAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_DisclosureSubsequentEventsAbstract" name="DisclosureSubsequentEventsAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_IncomeTaxAbstract" name="IncomeTaxAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_StatementTable" name="StatementTable" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="elva_StatementLineItems" name="StatementLineItems" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="RightofuseAssetMember" id="elva_RightofuseAssetMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="LeaseholdImprovementsOneMember" id="elva_LeaseholdImprovementsOneMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="ProductionEquipmentMember" id="elva_ProductionEquipmentMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="OfficeFurnitureAndEquipmentMember" id="elva_OfficeFurnitureAndEquipmentMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="CurrentsMember" id="elva_CurrentsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="ThirtyoneToSixtyMember" id="elva_ThirtyoneToSixtyMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="SixtyoneToNinetyMember" id="elva_SixtyoneToNinetyMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="CapitalWorkInProgressMember" id="elva_CapitalWorkInProgressMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="BatteryTechnologyMember" id="elva_BatteryTechnologyMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="ShareCapitalMember" id="elva_ShareCapitalMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="ContributedSurplusMember" id="elva_ContributedSurplusMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="WarrantsOneMember" id="elva_WarrantsOneMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="AccumulatedOtherComprehensiveMember" id="elva_AccumulatedOtherComprehensiveMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="CanadianMember" id="elva_CanadianMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="CommonSharesMember" id="elva_CommonSharesMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="StockOptionsMember" id="elva_StockOptionsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="LeaseMonthlyRentFirstYearMember" id="elva_LeaseMonthlyRentFirstYearMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="LeaseMonthlyRentSecondYearMember" id="elva_LeaseMonthlyRentSecondYearMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="LeaseMonthlyRentThirdYearMember" id="elva_LeaseMonthlyRentThirdYearMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="FinancialLiabilitiesTwentyTwentySixMember" id="elva_FinancialLiabilitiesTwentyTwentySixMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="FinancialLiabilitiesTwentyTwentySevenMember" id="elva_FinancialLiabilitiesTwentyTwentySevenMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="FinancialLiabilitiesTwentyTwentyEightMember" id="elva_FinancialLiabilitiesTwentyTwentyEightMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="FinancialLiabilitiesTwentyTwentyNineMember" id="elva_FinancialLiabilitiesTwentyTwentyNineMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="DerivativesLiabilitiesMember" id="elva_DerivativesLiabilitiesMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="TwoThousandFourteenMember" id="elva_TwoThousandFourteenMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="CanadaMember" id="elva_CanadaMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="UnitedStatesMember" id="elva_UnitedStatesMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="DetailsOfShareWarrantsMember" id="elva_DetailsOfShareWarrantsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="WarrantContinuityScheduleMember" id="elva_WarrantContinuityScheduleMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="DrSankarDasGuptaMember" id="elva_DrSankarDasGuptaMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="DrRajshekarDasGuptaMember" id="elva_DrRajshekarDasGuptaMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="DrSankarDasGuptaTrancheTwoMember" id="elva_DrSankarDasGuptaTrancheTwoMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="StockOptionsThrteenMember" id="elva_StockOptionsThrteenMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="StockOptionsOneMember" id="elva_StockOptionsOneMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="StockOptionsTwoMember" id="elva_StockOptionsTwoMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="StockOptionsThreeMember" id="elva_StockOptionsThreeMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="StockOptionsFourMember" id="elva_StockOptionsFourMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="StockOptionsFiveMember" id="elva_StockOptionsFiveMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="StockOptionsSixMember" id="elva_StockOptionsSixMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="StockOptionsSevenMember" id="elva_StockOptionsSevenMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="StockOptionsEightMember" id="elva_StockOptionsEightMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="StockOptionsNineMember" id="elva_StockOptionsNineMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="StockOptionsTenMember" id="elva_StockOptionsTenMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="StockOptionsElevenMember" id="elva_StockOptionsElevenMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="StockOptionsTwelvenMember" id="elva_StockOptionsTwelvenMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="FinanceCostsCashMember" id="elva_FinanceCostsCashMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="FinanceCostsNonCashMember" id="elva_FinanceCostsNonCashMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="NinetyOneToOnetwentyMember" id="elva_NinetyOneToOnetwentyMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="OtherLocationMember" id="elva_OtherLocationMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="MoreThanOneTwentyMember" id="elva_MoreThanOneTwentyMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="EximFinancingFacilityMember" id="elva_EximFinancingFacilityMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element name="FinancialLiabilitiesTwentyThirtyMember" id="elva_FinancialLiabilitiesTwentyThirtyMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xmlns="http://www.w3.org/2001/XMLSchema" />
</xsd:schema>
