POWER OF ATTORNEY
       The undersigned as a Section 16 reporting person of Volta Industries,
Inc. or Tortoise Acquisition Corp. II (each, the "Company"), hereby constitutes
and appoints Christopher Wendel, Francois P. Chadwick and James S. DeGraw, and
each of them, the undersigned's true and lawful attorney-in-fact to:
(1) execute, deliver and file for and on behalf of the undersigned, in the
undersigned's capacity as an officer and/or director of  the Company, Forms 3,
4, and 5 in accordance with Section 16(a) of the Exchange Act;
(2) 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,
complete and execute any amendment or amendments thereto, and timely file such
form with the SEC and any stock exchange or similar authority;
(3) seek or obtain, as the undersigned's representative and on the undersigned's
behalf, information on transactions in the Company's securities from any third
party, including brokers, employee benefit plan administrators and trustees, and
the undersigned hereby authorizes any such person to release any such
information to the undersigned and approves and ratifies any such release of
information; and
(4) 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, or 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 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 Exchange Act.
The undersigned further acknowledges and agrees that the attorney-in-fact and
the Company are relying on written and oral information provided by the
undersigned to complete such forms and the undersigned is responsible for
reviewing the completed forms prior to their filing.  The attorney-in-fact and
the Company are not responsible for any errors or omissions in such filings.
The attorney-in-fact and the Company are not responsible for determining whether
or not the transactions reported could be matched with any other transactions
for the purpose of determining liability for short-swing profits under Section
16(b).
       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 the undersigned in a signed writing delivered to the
Company and the foregoing attorneys-in-fact.
       IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 8/9/2021.
/s/ Katherine Savitt
Name:  Katherine J. Savitt