Exhibit

We have issued our report dated February 23, 2016, with respect to the consolidated financial statements included in the Annual Report of Active Power, Inc. on Form 10-K for the year ended December 31, 2015. We consent to the incorporation by reference of said report in the Registration Statements of Active Power, Inc. on Forms S-3 (File No. 333-188242 and File No. 333-181054) and on Forms S-8 (File No. 333-43248, File No. 333-56122, File No. 333-104725, File No. 333-115039, File No. 333-123587, File No. 333-132792, File No. 333-144782, File No. 333-150481, File No. 333-157662, File No. 333-165217, File No. 333-167005, File No. 333-181948 and File No. 333-203750).