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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person *   JSC INTER RAO Capital 2. Date of Event Requiring Statement (Month/Day/Year) 09/28/2012 3. Issuer Name and Ticker or Trading Symbol PLUG POWER INC [PLUG] (Last) (First) (Middle) 27 BOLSHAYA PIROGOVSKAYA STREET 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) 10% Owner 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) MOSCOW, 1Z 119435 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) 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, par value $0.01 4,462,693 D (1) Â

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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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 of Derivative Security: 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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
JSC INTER RAO Capital 27 BOLSHAYA PIROGOVSKAYA STREET MOSCOW, 1Z 119435	Â	  X	Â	10% Owner

Signatures

/s/ Marat A. Khanafeev		10/01/2012
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	On September 21, 2012, the Reporting Person and OJSC "Third Generation Company of the Wholesale Electricity Market" ("OGK-3") executed a Share Purchase Agreement for the sale of 4,462,693 shares of Common Stock of the Issuer by OGK-3 to the Reporting Person. On September 28, 2012, the Reporting Person and OGK-3 completed the sale of such Common Stock and the Reporting Person became the direct beneficial owner of 4,462,693 shares of Common Stock of the Issuer. The Reporting Person is a wholly-owned subsidiary of JSC "INTER RAO UES," a company organized under the laws of the Russian Federation.

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