P10 Industries (PIOE) 10-Q 2004 Q3 Quarterly report

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Active Power, Inc. (the “Company”) for the period ending September 30, 2004, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Joseph F. Pinkerton, III, Chairman of the Board, President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

(1) The Report fully complies with the requirements of Section 13a or 15d, as applicable, of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Joseph F. Pinkerton, III

Joseph F. Pinkerton, III

Chairman of the Board, President and

Chief Executive Officer (Principal Executive Officer)

October 27, 2004