Duke Energy (DUK) S-3ASR Automatic shelf registration

Exhibit 23.2

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 March 12, 2010 relating to the financial statements and financial statement schedule of Duke Energy Carolinas, LLC and subsidiaries (the “Company”), appearing in the Annual Report on Form 10-K of the Company for the year ended December 31, 2009, and to the reference to use under the heading “Experts” in the Prospectus, which is part of this Registration Statement.

/s/ DELOITTE & TOUCHE LLP

Charlotte, North Carolina

September 29, 2010