Exhibit 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement Nos. 333-236825, 333-239467 and 333-249758 on Form S-3, and Registration Statement Nos. 333-09167, 333-18391, 333-85094, 333-87529, 333-95795, 333-110332, 333-124257, 333-143916, 333-149989, 333-163805, 333-189578, 333-189579, 333-195768, 333-202364, 333-202366, 333-226039, 333-257414 and 333-257415 on Form S-8 of our reports dated February 24, 2022, relating to the consolidated financial statements of Dominion Energy, Inc. and subsidiaries and the effectiveness of Dominion Energy, Inc.andsubsidiaries’internalcontroloverfinancialreporting,appearinginthisAnnualReportonForm 10-K of Dominion Energy, Inc. for the year ended December 31,2021.

We consent to the incorporation by reference in Registration Statement No. 333-239472 on Form S-3 of our report dated February 24, 2022, relating to the consolidated financial statements of Virginia Electric and Power Company (a wholly-owned subsidiary of Dominion Energy, Inc.) and subsidiaries, appearing in this Annual Report on Form 10-K of Virginia Electric and Power Company for the year ended December 31, 2021.

/s/ Deloitte & Touche LLP

Richmond, Virginia

February 24, 2022