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Protonex Teams with Cummins to Jointly Promote Fuel Cell Power Solutions in the Recreational Vehicle Industry

SOUTHBOROUGH, Mass. - (BUSINESS WIRE) - Protonex Technology Corporation (LSE: AIM: PTX and PTXU), a leading provider of advanced fuel cell power systems, today announced that it has partnered with Cummins Onan, a business group of Cummins Inc. (NYSE: CMI), a global leader in power generation and distribution, to cooperate in the promotion of advanced fuel cell power solutions into the recreational vehicle (RV) market.

Under the terms of the agreement, Protonex and Cummins Onan plan to jointly conduct rigorous field testing of the Protonex M250-B fuel cell power system within RVs and Cummins will provide Protonex with selected marketing assistance at trade shows and other related events. In addition, Cummins is in the process of becoming a certified installer of Protonex fuel cell systems developed for RVs. The resulting testing, certification and promotional efforts are expected to facilitate the delivery of Protonex fuel cell power solutions to the RV market.

"Protonex is very pleased to have been selected by Cummins as a partner for providing advanced fuel cell power solutions to the RV market," stated Scott Pearson, CEO of Protonex. "Teaming with the global industry leader in commercial mobile power generation will have a significant impact on our ability to reach the RV market and will enable us to broaden the accessibility of fuel cell power solutions to consumers and the commercial mobile market."

Ed Pickens, RV Marketing Manager for Cummins Power Generation added, "We look forward to working with Protonex to explore applications for fuel cell technology in the RV market. As the RV market evolves, we see a role for fuel cells as a solution for mobile power needs."

Protonex plans to display its M250-B fuel cell power system in the Cummins Onan Booth (Booth H) at the 41^st Annual Pennsylvania RV and Camping Show-one of America's largest RV shows—September 16-20, 2009.

The M250-B power system leverages breakthrough advances in fuel cell and hybrid power technology developed by Protonex. The proprietary technology blends the advantages of a fuel cell power generator with conventional hybrid batteries. The M250-B runs on safe, clean, biodegradable methanol fuel. The system is configured to seamlessly integrate with existing power components typically found in an RV, including deep cycle batteries, generators, inverters, chargers, solar panels, and alternators.

About Protonex Technology Corporation
www.protonex.com

Protonex Technology Corporation develops and manufactures compact, lightweight and high- performance fuel cell systems for portable power applications in the 100 to 1000 Watt range. The Company's fuel cell systems are designed to meet the needs of military, commercial and consumer customers for off-grid applications underserved by existing technologies by providing customizable, stand-alone portable power solutions and systems that may be hybridized with existing power technologies. The Company is headquartered in Southborough, Massachusetts.

About Cummins Onan
www.cumminsonan.com

Cummins Onan Generators is a brand of Cummins Power Generation, a subsidiary of Cummins Inc. Cummins Inc. (NYSE: CMI), a global leader that manufactures, distributes and services engines, fuel systems, controls, air handling, filtration, emission solutions and electrical power generation. Headquartered in Columbus, Indiana, (USA) Cummins serves customers in more than 160 countries through its network of 550 company-owned and independent distributor facilities and more than 5,000 dealer locations. The Cummins Onan brand is found on generators and products manufactured for the RV, marine, commercial, residential and portable generator markets. Press releases can be found on the web at www.cumminsonan.com.

This announcement includes statements which are, or may be deemed to be, "forward-looking statements". All statements other than statements of historical facts included in this announcement, including, without limitation, those regarding Protonex' financial position, business strategy, plans and objectives of management for future operations (including development plans and objectives relating to Protonex' products and services) are forward-looking statements. By their nature, such forward-looking statements involve known and unknown risks, uncertainties and other important factors that could cause the actual results, performance or achievements of Protonex to be materially different from future results, performance or achievements expressed or implied by such forward-looking statements. These factors include but are not limited to those described in the Admission Document issued in connection with the Company's admission to AIM.

Forward-looking statements may and often do differ materially from actual results. Any forward-looking statements in this announcement speak only as at the date of this announcement and are subject to risks relating to future events and other risks, uncertainties and assumptions relation to Protonex' operations, results of operations, growth strategy and liquidity.

Protonex Technology Corporation
Scott Pearson, Chief Executive Officer
or
Margaret Dorsheimer, Director of Marketing
+1-508-490-9960
or
Redleaf Communications Limited
Press and Investor Relations
Samantha Robbins or Paul Dulieu
+44 (0)20 7566 6700
protonex@redleafpr.com
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Piper Jaffray Ltd.
Michael Covington
James Steele, +44 (0)20 3142 8700
Nominated Adviser