October 16, 2007

POWER OF ATTORNEY

	KNOW ALL BY THESE PRESENTS, that the undersigned hereby constitutes and
appoints each of David Crane, J. Andrew Murphy, Tanuja M. Dehne and Brian Curci
signing singly, the undersigned's true and lawful attorney-in-fact to: (i)
execute for and on behalf of the undersigned, in the undersigned's capacity as
an officer and/or director and/or owner of greater than 10% of the outstanding
Common Stock of NRG Energy, Inc., a Delaware corporation (the "Company"), Forms
3, 4, and 5 in accordance with Section 16(a) of the Securities Exchange Act of
1934 and the rules thereunder; (ii) do and perform any and all acts for and on
behalf of the undersigned which may be necessary or desirable to complete and
execute any such Form 3, 4, or 5 and timely file such form with the United
States Securities and Exchange Commission and any stock exchange or similar
authority, including the New York Stock Exchange; and (iii) take any other
action of any type whatsoever in connection with the foregoing which, in the
opinion of such attorney-in-fact, may be of benefit to, in the best interest of,
or legally required by, the undersigned, it being understood that the documents
executed by such attorney-in-fact on behalf of the undersigned pursuant to this
Power of Attorney shall be in such form and shall contain such terms and
conditions as such attorney-in-fact may approve in such attorney-in-fact's
discretion.

	The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact's substitute or
substitutes, shall lawfully do or cause to be done by virtue of this power of
attorney and the rights and powers herein granted.  Each of the undersigned
acknowledges that the foregoing attorneys-in-fact, in serving in such capacity
at the request of the undersigned, are not assuming, nor is the Company
assuming, any of the undersigned's responsibilities to comply with Section 16 of
the Securities Exchange Act of 1934.

	This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by each of the undersigned in a signed writing delivered
to the foregoing attorneys-in-fact.

	IN WITNESS WHEREOF, the undersigned have caused this Power of Attorney to be
executed as of date first written above.

Robert Flexon

/s/ Robert Flexon