SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* NGP Energy Technology Partners, L.P. (Last) (First) (Middle) 1700 K STREET, NW SUITE 750 (Street) WASHINGTON DC 20006 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol SATCON TECHNOLOGY CORP [ SATC ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 08/10/2010
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/10/2010		M		7,631,036	A	$1.25	7,631,036	D(1)
Common Stock	08/10/2010		F		2,592,064	D	$3.68	5,038,972	D(1)
Common Stock	08/10/2010		M		253,580	A	$1.25	5,292,552	D(1)
Common Stock	08/10/2010		F		86,135	D	$3.68	5,206,417	D(1)
Common Stock	08/10/2010		M		30,951	A	$1.66	5,237,368	D(1)
Common Stock	08/10/2010		F		13,962	D	$3.68	5,223,406	D(1)
Common Stock	08/10/2010		M		4,042	A	$1.66	5,227,448	D(1)
Common Stock	08/10/2010		F		1,824	D	$3.68	5,225,624	D(1)
Common Stock	08/10/2010		M		152,000	A	$1.8	5,377,624	D(1)
Common Stock	08/10/2010		F		74,348	D	$3.68	5,303,276	D(1)
Common Stock	08/10/2010		M		7,164	A	$1.66	5,310,440	D(1)
Common Stock	08/10/2010		F		3,232	D	$3.68	5,307,208	D(1)
Common Stock	08/10/2010		M		19,354	A	$1.66	5,326,562	D(1)
Common Stock	08/10/2010		F		8,731	D	$3.68	5,317,831	D(1)
Common Stock	08/10/2010		S		5,317,831	D	$3.25	0	D(1)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Warrant to purchase Common Stock	$1.25	08/10/2010		M			7,631,036	05/08/2008	11/08/2014	Common Stock	7,631,036	$0	11,541,317(2)	D(1)
Warrant to purchase Common Stock	$1.25	08/10/2010		M			253,580	12/20/2007	12/20/2014	Common Stock	253,580	$0	11,287,737(3)	D(1)
Warrant to purchase Common Stock	$1.66	08/10/2010		M			30,951	06/28/2008	06/28/2015	Common Stock	30,951	$0	11,256,786(3)	D(1)
Warrant to purchase Common Stock	$1.66	08/10/2010		M			4,042	09/27/2008	09/27/2015	Common Stock	4,042	$0	11,252,744(3)	D(1)
Warrant to purchase Common Stock	$1.8	08/10/2010		M			152,000	07/03/2009	07/03/2016	Common Stock	152,000	$0	11,100,744(3)	D(1)
Warrant to purchase Common Stock	$1.66	08/10/2010		M			7,164	10/03/2009	10/03/2016	Common Stock	7,164	$0	11,093,580(3)	D(1)
Warrant to purchase Common Stock	$1.66	08/10/2010		M			19,354	12/31/2009	12/31/2016	Common Stock	19,354	$0	11,074,226(3)	D(1)

1. Name and Address of Reporting Person* NGP Energy Technology Partners, L.P. (Last) (First) (Middle) 1700 K STREET, NW SUITE 750 (Street) WASHINGTON DC 20006 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* NGP ETP, L.L.C. (Last) (First) (Middle) 1700 K STREET, NW SUITE 750 (Street) WASHINGTON DC 20006 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Energy Technology Partners, L.L.C. (Last) (First) (Middle) 1700 K STREET, NW SUITE 750 (Street) WASHINGTON DC 20006 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. These securities are owned by NGP Energy Technology Partners, L.P. ("NGP Energy Tech"). These securities may be deemed to be beneficially owned by NGP ETP, L.L.C. ("NGP ETP"), Energy Technology Partners, L.L.C. ("ETP") and Philip J. Deutch ("Deutch"). NGP ETP is the general partner of NGP Energy Tech. ETP is the sole manager of NGP ETP and Deutch is the sole member and manager of ETP. Deutch is also a director of SatCon and has reported his beneficial ownership of the reported securities on a Form 4, filed on the date hereof. Each of NGP ETP, ETP and Deutch (the "Reporting Persons") disclaim beneficial ownership of the reported securities except to the extent of his, her or its pecuniary interest therein, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of the securities for purposes of Section 16 of the Securities Act of 1934, as amended, or for any other purpose.

2. Includes 9,615,384 shares of Common Stock issuable upon conversion of 10,000 shares of Series C convertible Preferred Stock, 1,297,418 shares of Common Stock issuable upon the conversion of accrued dividends on the Series C convertible Preferred Stock and 628,515 shares of Common Stock issuable upon the exercise of warrants, which preferred stock and warrants are directly owned.

3. Includes shares of Common Stock issuable upon conversion of 10,000 shares of Series C convertible Preferred Stock, shares of Common Stock issuable upon the conversion of accrued dividends on the Series C convertible Preferred Stock and shares of Common Stock issuable upon the exercise of warrants, which preferred stock and warrants are directly owned.

	NGP Energy Technology Partners, L.P., By: NGP ETP, L.L.C., Its: General Partner, By: /s/ Philip J. Deutch	08/12/2010
	NGP ETP, L.L.C. By: /s/ Philip J. Deutch, Title: Authorized Member	08/12/2010
	Energy Technology Partners, L.L.C., By: /s/ Philip J. Deutch, Title: Sole Member and Manager	08/12/2010
	** 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 4 (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).
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