Northern States Power S-3ASR Automatic shelf registration

Exhibit 23(e)(4)

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated February 21, 2024 relating to the financial statements of Southwestern Public Service Company, appearing in the Annual Report on Form 10-K of Southwestern Public Service Company for the year ended December 31, 2023. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/ DELOITTE & TOUCHE LLP

Minneapolis, Minnesota

April 18, 2024