Tucson Electric Power 10-Q 2012 Q3 Quarterly report

Exhibit 32(a)

UNS ENERGY CORPORATION

STATEMENTS OF CORPORATE OFFICERS

(Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002)

Each of the undersigned, Paul J. Bonavia, Chairman of the Board and Principal Executive Officer of UNS Energy Corporation (the “Company”), and Kevin P. Larson, Senior Vice President and Principal Financial Officer of the Company, hereby certifies, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2012, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, and that the information contained therein fairly presents, in all material respects, the financial condition and results of operations of the Company.

November 2, 2012

/s/ Paul J. Bonavia

      Paul J. Bonavia

Chairman of the Board and

Principal Executive Officer

UNS Energy Corporation

/s/ Kevin P. Larson

      Kevin P. Larson

Senior Vice President and

Principal Financial Officer

UNS Energy Corporation