SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* Boston Brad (Last) (First) (Middle) 2128 W. BRAKER LANE BRAKER 12 (Street) AUSTIN TX 78758 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 03/16/2005	3. Issuer Name and Ticker or Trading Symbol ACTIVE POWER INC [ ACPW ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner Officer (give title below) Other (specify below)	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	0	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	Michael Chibib (Attorney in Fact)	03/18/2005
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

CONFIRMING STATEMENT

	This Statement confirms that the undersigned, Brad Boston, has authorized and
designated Michael Chibib to execute and file on the undersigned's behalf all Forms 3, 4, and 5
(including any amendments thereto) that the undersigned may be required to file with the U.S.
Securities and Exchange Commission as a result of the undersigned's ownership of or
transactions in securities of Active Power, Inc.  The authority of Michael Chibib under this
Statement shall continue until the undersigned is no longer required to file Forms 3, 4, and 5 with
regard to the undersigned's ownership of or transactions in securities of Active Power, Inc.,
unless earlier revoked in writing.  The undersigned acknowledges that Michael Chibib is not
assuming any of the undersigned's responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934.


Date: March 17, 2005					/s/ Brad Boston
							Brad Boston