PLUG Plug Power Inc

Plug Power Inc. (Nasdaq:PLUG) today announced it has been ranked on Deloitte's Technology Fast 500™, a ranking of the 500 fastest growing technology, media, telecommunications, life sciences and clean technology companies in North America. Plug Power grew 149 percent during this period.

Plug Power's chief executive officer, Mr. Andy Marsh, credits commercial and economic viability of its proven GenDrive® hydrogen fuel cell product with the company's 149 percent revenue growth. He said, "Plug Power has established a market for our GenDrive hydrogen fuel cell solution in the material handling industry. GenDrive allows customers to eliminate toxic lead-acid batteries from their lift truck fleets and implement a green power solution that increases productivity and lowers operational costs."

"Plug Power, like all 2011 Technology Fast 500™ companies, have excelled in fostering innovation and channeling it into spectacular growth -- against the backdrop of one of the most challenging economies in history," said Eric Openshaw, vice chairman and U.S. technology, media and telecommunications leader, Deloitte LLP. "Deloitte recognizes Plug Power for its remarkable accomplishment."

"We are pleased to honor Plug Power as a 2011 Technology Fast 500 company," said Mark Jensen, managing partner, technology and venture capital services, Deloitte & Touche LLP. "As one of the fastest growing tech companies in North America, Plug Power has demonstrated excellence in technological innovation, entrepreneurship and rapid growth."

About Deloitte's 2011 Technology Fast 500™

Technology Fast 500, which was conducted by Deloitte & Touche LLP, a subsidiary of Deloitte LLP, provides a ranking of the fastest growing technology, media, telecommunications, life sciences and clean technology companies – both public and private - in North America. Technology Fast 500 award winners are selected based on percentage fiscal year revenue growth from 2006 to 2010.

In order to be eligible for Technology Fast 500 recognition, companies must own proprietary intellectual property or technology that is sold to customers in products that contribute to a majority of the company's operating revenues. Companies must have base-year operating revenues of at least $50,000 USD or CD, and current-year operating revenues of at least $5 million USD or CD. Additionally, companies must be in business for a minimum of five years, and be headquartered within North America.

About Plug Power Inc.

The architects of modern fuel cell technology, Plug Power revolutionized the industry with cost-effective power solutions that increase productivity, lower operating costs and reduce carbon footprints. Long-standing relationships with industry leaders forged the path for Plug Power's key accounts, including Wegmans, Whole Foods, and FedEx Freight.  With more than 1,200 GenDrive units shipped to material handling customers, accumulating over 4.5 million hours of runtime, Plug Power manufactures tomorrow's incumbent power solutions today. Additional information about Plug Power is available at www.plugpower.com.

The Plug Power Inc. logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=4446

Plug Power Inc. Safe Harbor Statement

This communication contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements are based on current expectations that are subject to certain assumptions, risks and uncertainties, any of which are difficult to predict, are beyond Plug Power's control and that may cause Plug Power's actual results to differ materially from the expectations in Plug Power's forward-looking statements including statements regarding the risk that revenue growth can or will be sustained, that unit orders will not ship, be installed and/or convert to revenue, in whole or in part; the cost and timing of developing Plug Power's products and its ability to raise the necessary capital to fund such development costs; the risk that the previously disclosed expected uses of the Company's recently raised capital may change; the ability to achieve the forecasted gross margin on the sale of Plug Power's products; the actual net cash used for operating expenses may exceed the projected net cash for operating expenses; the cost and availability of fuel and fueling infrastructures for Plug Power's products; market acceptance of Plug Power's GenDrive system; Plug Power's ability to establish and maintain relationships with third parties with respect to product development, manufacturing, distribution and servicing and the supply of key product components; the cost and availability of components and parts for Plug Power's products; Plug Power's ability to develop commercially viable products; Plug Power's ability to reduce product and manufacturing costs; Plug Power's ability to successfully expand its product lines; Plug Power's ability to improve system reliability for GenDrive; competitive factors, such as price competition and competition from other traditional and alternative energy companies; Plug Power's ability to manufacture products on a large-scale commercial basis; Plug Power's ability to protect its intellectual property; the cost of complying with current and future governmental regulations; and other risks and uncertainties discussed under "Item IA-Risk Factors" in (i) Plug Power's annual report on Form 10-K for the fiscal year ended December 31, 2010, filed with the Securities and Exchange Commission ("SEC") on March 31, 2011 and (ii) in Plug Power's quarterly report on Form 10-Q for the quarter ended March 31, 2011 filed with the SEC on May 13, 2011, as well as in the other reports Plug Power files from time to time with the SEC.  Plug Power does not intend to, and undertakes no duty to update any forward-looking statements as a result of new information or future events.

CONTACT: Media Contact:
         Reid Hislop
         Plug Power Inc.
         Phone: (518) 782-7700 ext. 1360
         
         Investor Relations Contact:
         Cathy Yudzevich
         Plug Power Inc.
         Phone: (518) 782-7700 ext. 1448