EXHIBIT 23.2 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Registration Statement No. 333-101473 of Reliant Energy, Inc. on Form S-8 of our report dated June 27, 2003, appearing in this Annual Report on Form 11-K of Reliant Energy, Inc. Savings Plan (formerly the Reliant Resources, Inc. Savings Plan) for the year ended December 31, 2002. /s/ DELOITTE & TOUCHE LLP Houston, Texas June 25, 2004