Exhibit 23.3

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Post-Effective Amendment No. 1 to the Registration Statement on Form S-3 of our report dated February 17, 2026, relating to the consolidated financial statements of NSTAR Electric Company appearing in the Annual Report on Form 10-K of NSTAR Electric Company for the year ended December 31, 2025. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/ DELOITTE & TOUCHE LLP

Hartford, CT

February 20, 2026