<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2016-02-08</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001419612</issuerCik>
        <issuerName>SolarEdge Technologies Inc</issuerName>
        <issuerTradingSymbol>SEDG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001636816</rptOwnerCik>
            <rptOwnerName>Opus Capital Venture Partners V, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2730 SAND HILL ROAD, SUITE 150</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MENLO PARK</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94025</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2016-02-08</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>549944</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4000000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F3"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">On February 8, 2016, Opus Capital Venture Partners V, L.P. (the &quot;Fund&quot;) distributed, for no consideration, 549,944 shares of Common Stock of the issuer (the &quot;Shares&quot;) to its limited partners and to Opus Capital Venture Partners (GP), L.P. (&quot;Opus GP&quot;), the general partner of the Fund, representing each such partner's pro rata interest in the shares held by the Fund (the &quot;Fund Distribution&quot;). Subsequently and on the same date, Opus GP distributed, for no consideration, the Shares it received in the Fund Distribution to its limited partners and to Opus Capital Venture Partners (GPLLC), L.L.C.</footnote>
        <footnote id="F2">(Continued from Footnote 1) (&quot;Opus GP LLC&quot;), the general partner of Opus GP, representing each such partner's pro rata interest in such Shares (the &quot;Opus GP Distribution&quot;).  Subsequently and on the same date, Opus GP LLC distributed, for no consideration, the Shares it received in the Opus GP Distribution to its members in an amount equal to each such member's pro rata interest in such Shares. Each of the aforementioned distributions were made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended.</footnote>
        <footnote id="F3">These Shares are directly held by the Fund. Each of Opus GP, Opus GP LLC, and each of Carl Showalter, Dan Avida and Gill Cogan, who are the Managing Members of Opus GP LLC, disclaims beneficial ownership over the Shares held by the Fund, except to the extent of each of its or their pecuniary interest therein, if any, and this report shall not be deemed an admission that any such person is the beneficial owner of the Shares held by the Fund.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Gill Cogan, manager of Opus Capital Venture Partners (GPLLC), L.L.C., general partner of Opus Capital Venture Partners (GP), L.P., general partner of Opus Capital Venture Partners V, L.P.</signatureName>
        <signatureDate>2016-02-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
