EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-3A of our reports dated February 13, 2007 relating to the financial statements and financial statement schedule of Exelon Generation Company LLC; the financial statements and financial statement schedule of PECO Energy Company; and the financial statements, financial statement schedule, management’s assessment of the effectiveness of internal control over financial reporting and the effectiveness of internal control over financial reporting of Exelon Corporation, which appear in Exelon Corporation’s Annual Report on Form 10-K for the year ended December 31, 2006. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

PricewaterhouseCoopers LLP

Chicago, Illinois

December 12, 2007