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	<link:roleType roleURI="http://oceanpowertechnologies.com/role/OperatingSegmentsAndGeographicInformationDetailsNarrative" id="OperatingSegmentsAndGeographicInformationDetailsNarrative">
	  <link:definition>00000056 - Disclosure - Operating Segments and Geographic Information (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:linkbaseRef xlink:type="simple" xlink:href="optt-20220731_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Presentation Links" />
	<link:linkbaseRef xlink:type="simple" xlink:href="optt-20220731_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Label Links" />
	<link:linkbaseRef xlink:type="simple" xlink:href="optt-20220731_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Calculation Links" />
	<link:linkbaseRef xlink:type="simple" xlink:href="optt-20220731_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Definition Links" />
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    <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
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    <element id="OPTT_IncreaseDecreaseInLitigationPayable" name="IncreaseDecreaseInLitigationPayable" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
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    <element id="OPTT_ScheduleOfRightofUseAssetsAndLeaseLiabilitiesTableTextBlock" name="ScheduleOfRightofUseAssetsAndLeaseLiabilitiesTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
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    <element id="OPTT_StockIssuedDuringPeriodValueIssuedForCommitmentFee" name="StockIssuedDuringPeriodValueIssuedForCommitmentFee" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
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    <element id="OPTT_StockIssuedDuringPeriodSharesCanBeIssuedBasedUponOutstandingPercentage" name="StockIssuedDuringPeriodSharesCanBeIssuedBasedUponOutstandingPercentage" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
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