Exhibit 31.2

I, Paul B. Middleton certify that:

1.I have reviewed this annual report on Form 10-K/A of Plug Power Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

Date: May 1, 2017	by:	/s/ PAUL B. MIDDLETON
		Paul B. Middleton
		Chief Financial Officer