Exhibit 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 333-90275 and No. 333-90277) of Plug Power, Inc. of our report dated February 8, 2000 relating to the financial statements, which appears in this Form 10-K. /s/ PricewaterhouseCoopers LLP Albany, New York March 29, 2000