Attached files

file filename
EXCEL - IDEA: XBRL DOCUMENT - PLUG POWER INCFinancial_Report.xls
EX-32.1 - EX-32.1 - PLUG POWER INCa2223676zex-32_1.htm
EX-31.2 - EX-31.2 - PLUG POWER INCa2223676zex-31_2.htm
EX-32.2 - EX-32.2 - PLUG POWER INCa2223676zex-32_2.htm
10-K - 10-K - PLUG POWER INCa2223676z10-k.htm
EX-31.1 - EX-31.1 - PLUG POWER INCa2223676zex-31_1.htm

QuickLinks -- Click here to rapidly navigate through this document


EXHIBIT 23.1

The Board of Directors
Plug Power Inc.:

        We consent to the incorporation by reference in the registration statements on Form S-8 (Nos. 333-200912, 333-175907, 333-72734, 333-90275, and 333-90277) and Form S-3 (Nos. 333-195007, 333-189056 and 333-150382) of Plug Power Inc. of our report dated March 17, 2015, with respect to the consolidated balance sheets of Plug Power Inc. and subsidiaries (the "Company") as of December 31, 2014 and 2013, and the related consolidated statements of operations, comprehensive loss, stockholders' equity (deficit), and cash flows for each of the years in the three-year period ended December 31, 2014, which report appears in the December 31, 2014 annual report on Form 10-K of Plug Power Inc.

        Our report dated March 17, 2015 contains an explanatory paragraph that states the scope of management's assessment of internal control over financial reporting excluded the internal control over financial reporting of ReliOn, Inc. ("ReliOn"), which the Company acquired in April 2014. ReliOn represented 3% of total assets and 5% of total revenue included in the Company's consolidated financial statements as of and for the year ended December 31, 2014. Our audit of internal control over financial reporting of the Company also excluded an evaluation of the internal control over financial reporting of ReliOn.

/s/ KPMG LLP

Albany, New York
March 17, 2015




QuickLinks