-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 QZ9g2oHl6zcSxaB0E25++HKi2E90dWCEZPiJ/iSqucVGx3afWkZXhnbov6s145jN
 oIzcrNQ4tKeYNWC/KCUW7Q==

<SEC-DOCUMENT>0001177454-03-000019.txt : 20030904
<SEC-HEADER>0001177454-03-000019.hdr.sgml : 20030904
<ACCEPTANCE-DATETIME>20030904144413
ACCESSION NUMBER:		0001177454-03-000019
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030902
FILED AS OF DATE:		20030904

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FUELCELL ENERGY INC
		CENTRAL INDEX KEY:			0000886128
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES [3690]
		IRS NUMBER:				060853042
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1031

	BUSINESS ADDRESS:	
		STREET 1:		3 GREAT PASTURE RD
		CITY:			DANBURY
		STATE:			CT
		ZIP:			06813
		BUSINESS PHONE:		2038256000

	MAIL ADDRESS:	
		STREET 1:		3 GREAT PASTURE ROAD
		CITY:			DANBURY
		STATE:			CT
		ZIP:			06813

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ENERGY RESEARCH CORP /NY/
		DATE OF NAME CHANGE:	19930328

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BRDAR DANIEL
		CENTRAL INDEX KEY:			0001260614

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14204
		FILM NUMBER:		03881278

	BUSINESS ADDRESS:	
		STREET 1:		C/O FUELCELL ENERGY, INC
		STREET 2:		3 GREAT PASTURE ROAD
		CITY:			DANBURY
		STATE:			CT
		ZIP:			06813-1305
		BUSINESS PHONE:		2038256000

	MAIL ADDRESS:	
		STREET 1:		FUELCELL ENERGY INC
		STREET 2:		3 GREAT PASTURE ROAD
		CITY:			DANBURY
		STATE:			CT
		ZIP:			06813-1305
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>3</documentType><periodOfReport>2003-09-02</periodOfReport>
    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000886128</issuerCik>
        <issuerName>FUELCELL ENERGY INC</issuerName>
        <issuerTradingSymbol>FCEL</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001260614</rptOwnerCik>
            <rptOwnerName>BRDAR DANIEL</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O FUELCELL ENERGY, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>3 GREAT PASTURE ROAD</rptOwnerStreet2>
            <rptOwnerCity>DANBURY</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06813-1305</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>VP Production Development</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeHolding><securityTitle><value>Common Stock</value></securityTitle><postTransactionAmounts><sharesOwnedFollowingTransaction><value>1249</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></nonDerivativeHolding></nonDerivativeTable><derivativeTable><derivativeHolding><securityTitle><value>Employee Stock Option &quot;right to buy&quot;</value></securityTitle><conversionOrExercisePrice><value>38.00</value></conversionOrExercisePrice><exerciseDate><value>2001-10-12</value><footnoteId id="F1"/></exerciseDate><expirationDate><value>2010-10-12</value></expirationDate><underlyingSecurity><underlyingSecurityTitle>
<value>Common Shares $.0001 par value</value></underlyingSecurityTitle><underlyingSecurityShares><value>60000</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Employee Stock Option &quot;right to buy&quot;</value></securityTitle><conversionOrExercisePrice><value>13.76</value></conversionOrExercisePrice><exerciseDate><value>2002-12-19</value><footnoteId id="F1"/></exerciseDate><expirationDate><value>2011-12-19</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Shares $.0001 par value</value></underlyingSecurityTitle><underlyingSecurityShares><value>34000</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></d
erivativeHolding><derivativeHolding><securityTitle><value>Employee Stock Option &quot;right to buy&quot;</value></securityTitle><conversionOrExercisePrice><value>5.45</value></conversionOrExercisePrice><exerciseDate><value>2004-02-11</value><footnoteId id="F1"/></exerciseDate><expirationDate><value>2013-02-11</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Shares $.0001 par value</value></underlyingSecurityTitle><underlyingSecurityShares><value>50000</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeHolding></derivativeTable><footnotes><footnote id="F1">These options are exercisable in four yearly installments beginning one year from date of grant which is ten years prior to the expiration date.</footnote></footnotes><remarks/><ownerSignature><signatureName>R. Daniel Brdar</signatureName><signatureDate>2003
- -09-04</signatureDate></ownerSignature></ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----