<SEC-DOCUMENT>0001209191-19-040246.txt : 20190702
<SEC-HEADER>0001209191-19-040246.hdr.sgml : 20190702
<ACCEPTANCE-DATETIME>20190702161748
ACCESSION NUMBER:		0001209191-19-040246
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20190628
FILED AS OF DATE:		20190702
DATE AS OF CHANGE:		20190702

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MARLO DENNIS S
		CENTRAL INDEX KEY:			0001222380

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32253
		FILM NUMBER:		19937582

	MAIL ADDRESS:	
		STREET 1:		1130 BERKSHIRE BOULEVARD
		CITY:			WYOMISSING
		STATE:			PA
		ZIP:			19610

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			EnerSys
		CENTRAL INDEX KEY:			0001289308
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-ELECTRICAL APPARATUS & EQUIPMENT, WIRING SUPPLIES [5063]
		IRS NUMBER:				233058564
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0331

	BUSINESS ADDRESS:	
		STREET 1:		2366 BERNVILLE ROAD
		CITY:			READING
		STATE:			PA
		ZIP:			19605
		BUSINESS PHONE:		(610) 208-1600

	MAIL ADDRESS:	
		STREET 1:		2366 BERNVILLE ROAD
		CITY:			READING
		STATE:			PA
		ZIP:			19605
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
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    <periodOfReport>2019-06-28</periodOfReport>

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    <issuer>
        <issuerCik>0001289308</issuerCik>
        <issuerName>EnerSys</issuerName>
        <issuerTradingSymbol>ENS</issuerTradingSymbol>
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            <rptOwnerName>MARLO DENNIS S</rptOwnerName>
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        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ENERSYS</rptOwnerStreet1>
            <rptOwnerStreet2>2366 BERNVILLE ROAD</rptOwnerStreet2>
            <rptOwnerCity>READING</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>19605</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
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            <securityTitle>
                <value>Common Stock</value>
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                <value></value>
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                    <value>0.0589</value>
                    <footnoteId id="F5"/>
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                    <value>0.00</value>
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                    <value>A</value>
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                    <value>59183.2573</value>
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                    <value>D</value>
                </directOrIndirectOwnership>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2019-03-29</value>
            </transactionDate>
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            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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                <value></value>
            </transactionTimeliness>
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                <transactionShares>
                    <value>0.0971</value>
                    <footnoteId id="F6"/>
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                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
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                <sharesOwnedFollowingTransaction>
                    <value>59183.3544</value>
                </sharesOwnedFollowingTransaction>
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                    <value>D</value>
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        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">These shares were granted in the form of Deferred Stock Units (&quot;DSUs&quot;), in connection with the cash dividend paid on June 28, 2019 to stockholders of record as of June 14, 2019 (the &quot;Dividend&quot;), with respect to 22,840 vested DSUs granted to the reporting person on various dates, and adjusted for previously declared and paid cash dividends.  These DSUs are vested and payable concurrent with the underlying DSUs.</footnote>
        <footnote id="F2">These shares were granted in the form of Restricted Stock Units (&quot;RSUs&quot;), in connection with the Dividend, with respect to vested RSUs granted to the reporting person on various dates under the EnerSys Deferred Compensation Plan for Non-Employee Directors (the &quot;Plan&quot;), and adjusted for previously declared and paid cash dividends. These RSUs are vested and payable concurrent with the underlying RSUs.</footnote>
        <footnote id="F3">These shares were granted in the form of RSUs, in connection with the Dividend, with respect to unvested RSUs granted to the reporting person on July 18, 2018, under the Plan. These RSUs are vested and payable concurrent with the underlying RSUs.</footnote>
        <footnote id="F4">These shares were granted in the form of RSUs, in connection with the Dividend, with respect to unvested RSUs granted to the reporting person on October 23, 2018, under the Plan. These RSUs are vested and payable concurrent with the underlying RSUs.</footnote>
        <footnote id="F5">These shares were granted in the form of RSUs, in connection with the Dividend, with respect to unvested RSUs granted to the reporting person on January 15, 2019. These RSUs are vested and payable concurrent with the underlying RSUs.</footnote>
        <footnote id="F6">These shares were granted in the form of RSUs, in connection with the Dividend, with respect to unvested RSUs granted to the reporting person on April 10, 2019, under the Plan. These RSUs are vested and payable concurrent with the underlying RSUs.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Karen J. Yodis, by Power of Attorney</signatureName>
        <signatureDate>2019-07-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
