EXHIBIT 32.1

Ener1, Inc. 500 West Cypress Creek
Road-Suite 100 Ft. Lauderdale, Florida, 33309

May 20, 2004

Securities and Exchange
Commission450 5th Street, NWWashington, DC 20549

Re: Certification Of Principal Executive Officer Pursuant To 18 U.S.C. Sec. 1350

Dear Ladies and Gentlemen:

In
connection with the accompanying Quarterly Report on Form 10-QSB of Ener1, Inc., for the
quarter ended September 30, 2003, I, Kevin P. Fitzgerald, Chief Executive Officer of
Ener1, Inc., hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002, that:

| | 1) | such
Quarterly Report on Form 10-QSB of Ener1, Inc., for the quarter ended March           31,
2004, fully complies with the requirements of Section 13(a) or 15(d) of the
          Securities Exchange Act of 1934; and
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| | 2) | the
information contained in such Quarterly Report on Form 10-QSB of Ener1,           Inc.,
for the quarter ended March 31, 2004, fairly presents, in all material
          respects, the financial condition and results of operations of Ener1, Inc.
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

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| | By:
                    /s/ Kevin P. Fitzgerald
                        Kevin P. Fitzgerald
                        Chief Executive Officer
                        (Principal Executive Officer and Duly
                        Authorized Officer)

A signed original of this written
statement required by Section 906, or other document authenticating, acknowledging or
otherwise adopting the signature that appears in typed form within the electronic version
of this written statement required by Section 906, has been provided to Ener1, Inc.
and will be retained by Ener1, Inc. and furnished to the Securities and Exchange
Commission or its staff upon request.

In accordance with Item 601 of
Regulation S-K, this certification is being furnished as
Exhibit 32.1 to Ener1, Inc.s quarterly report and shall not be deemed
filed for purposes of Section 18 of the Securities Exchange Act of 1934
(the Exchange Act) or otherwise subject to the liabilities of that section,
nor shall it be deemed incorporated by reference in any filing under the Securities Act of
1933 or the Exchange Act, except as expressly set forth by specific reference in such a
filing.