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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 IqxRGUiG++DMA7wPVqnodLxM+ygRQ8goIXUpV/UIgMnzzKTV7L7ERKbCcAIQy2ij
 39jlhedKIIwkZ/XQwsRSTw==

<SEC-DOCUMENT>0001209191-08-061503.txt : 20081119
<SEC-HEADER>0001209191-08-061503.hdr.sgml : 20081119
<ACCEPTANCE-DATETIME>20081119120357
ACCESSION NUMBER:		0001209191-08-061503
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20081118
FILED AS OF DATE:		20081119
DATE AS OF CHANGE:		20081119

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ZUIDERVEEN GARY J
		CENTRAL INDEX KEY:			0001244301

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12014
		FILM NUMBER:		081200156

	BUSINESS ADDRESS:	
		STREET 1:		303 EAST 17TH AVENUE
		STREET 2:		SUITE 660
		CITY:			DENVER
		STATE:			CO
		ZIP:			80203
		BUSINESS PHONE:		3037858080

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			POWERSECURE INTERNATIONAL, INC.
		CENTRAL INDEX KEY:			0000882154
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-BUSINESS SERVICES, NEC [7389]
		IRS NUMBER:				841169358
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1609 HERITAGE COMMERCE COURT
		CITY:			WAKE FOREST
		STATE:			NC
		ZIP:			27587
		BUSINESS PHONE:		919-556-3056

	MAIL ADDRESS:	
		STREET 1:		1609 HERITAGE COMMERCE COURT
		CITY:			WAKE FOREST
		STATE:			NC
		ZIP:			27587

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	METRETEK TECHNOLOGIES INC
		DATE OF NAME CHANGE:	19990608

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MARCUM NATURAL GAS SERVICES INC/NEW
		DATE OF NAME CHANGE:	19930328
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-11-18</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000882154</issuerCik>
        <issuerName>POWERSECURE INTERNATIONAL, INC.</issuerName>
        <issuerTradingSymbol>POWR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001244301</rptOwnerCik>
            <rptOwnerName>ZUIDERVEEN GARY J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2236 SOUTH PINION COURT</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DENVER</rptOwnerCity>
            <rptOwnerState>CO</rptOwnerState>
            <rptOwnerZipCode>80210</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP, PAO, Controller</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2008-11-18</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>10000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>3.5637</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>53798</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Gary J. Zuiderveen</signatureName>
        <signatureDate>2008-11-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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