Plug Power Inc. (NASDAQ: PLUG) introduced today the GenCoreTM5T, the Company's new 5-kilowatt fuel cell system, designed to provide extended run back-up power specifically for the telecommunications industry in the demanding outside plant (OSP) market.

LATHAM, N.Y. -- June 3, 2003 -- Plug Power Inc. (NASDAQ: PLUG) introduced today the GenCoreTM5T, the Company's new 5-kilowatt fuel cell system, designed to provide extended run back-up power specifically for the telecommunications industry in the demanding outside plant (OSP) market. GenCoreTM5T is Plug Power's first direct hydrogen product based on a proprietary, modular, scaleable, architected GenCore fuel cell platform. Future products from this platform, ranging from 2-12 kilowatts, will be marketed to the cable broadband and uninterruptible power supply (UPS) industries.

"Providing back-up power to the telecommunications industry demands tough, reliable and predictable power solutions," said Mark A. Sperry, Chief Marketing Officer, Plug Power. "The GenCoreTM5T is expected to provide the most effective solution to meet the increasing energy needs of the telecommunications market. Priced at $14,995 ($3,000/kilowatt), the zero-emission GenCoreTM5T will appeal to system operators concerned with reducing life-cycle maintenance and total equipment expenses."

GenCoreTM5T will be introduced at SuperComm, a premier communications and information technology exhibition produced by the Telecommunications Industry Association and the United States Telecom Association in Atlanta, Georgia, from June 3-5 2003. The system will be on display at the Tyco Electronic Power System booth (# 23737) and Plug Power booth (# 23478) throughout the three-day SuperComm event that started today. Tyco Electronics Power Systems is showing the system as part of its next generation telecom power display.

Shipment of the GenCoreTM5T is expected to begin during the fourth quarter of 2003 under a controlled introduction strategy driven by customer demand and the establishment of a distribution and support infrastructure. Plug Power is actively working with technical and fuel service providers to support the GenCoreTM5T product rollout. Plug Power currently has a 10-unit order backlog for the GenCoreTM5T product. GenCoreTM5T joins Plug Power's product GenSysTM5CS, which has generated approximately 2 million kilowatt hours of electricity and heat to more than 130 customers over the past 15 months.

About Plug Power

Plug Power Inc. designs, manufactures and markets proton exchange membrane (PEM) fuel cells for stationary applications. Plug Power's strategic partners include GE, DTE Energy Technologies, Vaillant GmbH, Honda R&D Co., Ltd., Engelhard and Celanese. The Company's headquarters are located in Latham, N.Y., with offices in Washington, D.C., and The Netherlands.