Exhibit

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No. 333-213383), Form S-4 (No. 333-209209) and on Form S-8 (No. 333-219037, No. 333-215114, No.333-189849, No.333-175162, No.333-127377, No.333-37082, No.333-49780 and No. 333-61390) of Exelon Corporation of our report dated February 9, 2018 relating to the financial statements, financial statement schedules and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.