Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-226663 on Form S-8 of our report dated June 15, 2021, appearing in this Annual Report on Form 11-K of the Tucson Electric Power Company 401(k) Plan for the year ended December 31, 2020.

/s/ R&A CPAs, a professional corporation

R&A CPAs, a professional corporation

Tucson, Arizona

June 15, 2021