POWER OF ATTORNEY

The undersigned hereby constitutes and appoints Sophia Lee
with full power of substitution, as the undersigned's true
and lawful attorney-in-fact to:

(1) execute for and on behalf of the undersigned, in
the undersigned's capacity as officer and/or director of
Altus Power, Inc. (the "Company"), Forms 3, 4, 5 and any
Schedules 13D or 13G in accordance with Section 16(a) of
the Securities Exchange Act of 1934, as amended, and the
rules thereunder;

(2) do and perform any and all acts for and on behalf of
the undersigned that may be necessary or desirable to
complete and execute any such Form 3, 4, or 5 or Schedule
13D or 13G, complete and execute any amendment or amendments
thereto, and timely file such form with the SEC and any
stock exchange or similar authority; and

(3) take any other action of any type whatsoever in
connection with the foregoing that, in the opinion of each
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 each 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 each such
attorney-in-fact may approve in each 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 each such attorney-in-fact, or each
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.  The
undersigned acknowledges that each foregoing attorney-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, as amended.

This Power of Attorney shall remain in full force and effect
until the undersigned is no longer required to file Forms
3, 4, 5, and any Schedules 13D or 13G with respect to the
undersigned's holdings of and transactions in securities issued
by the Company, unless earlier revoked by the undersigned in a
signed writing delivered to each foregoing attorney-in-fact.

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IN WITNESS WHEREOF, the undersigned has caused this Power of
Attorney to be executed as of this 20th day of January, 2023.

/s/ Diane D. Brink
Name: Diane D. Brink