EXHIBIT 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No. 333-62958) and Form S-8 (No. 333-38892) of NRG Energy, Inc. of our report dated February 21, 2002 relating to the consolidated financial statements of NRG Energy, Inc., which appears in the Current Report on Form 8-K dated February 26, 2002. PricewaterhouseCoopers LLP Minneapolis, Minnesota February 26, 2002