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Enova Systems Selected to Develop and Integrate Fuel Cell Bus for U.S. Air Force

TORRANCE, Calif.--July 24, 2003--Enova Systems, Torrance, Calif., (OTCBB:ENVA), a developer and manufacturer of mobile and stationary electric, hybrid and fuel cell digital power management systems, announced today that the State of Hawaii's High Technology Development Corporation (HTDC) awarded Enova a contract valued at over $600,000, including earlier engineering efforts, to develop new technologies for heavy-duty mobile fuel cell applications and lead the integration of these and other technologies into a fuel cell powered thirty-foot hybrid bus to be stationed at the Hickam Air Force Base in Hawaii.

As part of this new program, Enova will develop several new components including a Dual 8kW inverter, a 380V DC/DC converter, additional software development for Enova's already proven, successful Hybrid Control Unit and a Mobile Fuel Cell Generator that incorporates a Hydrogenics Corporation's 20kW fuel cell stack.

Carl D. Perry, CEO and President, stated, "We are very pleased and excited to be selected by the U.S. Air Force and HTDC to be the team leader in developing this fuel cell bus in Hawaii. This newest program emphasizes the State of Hawaii's continued recognition of Enova as a world-class leader in advanced hybrid and fuel cell technologies. Enova's expertise in the burgeoning field of fuel cell hybrid powered vehicles is versatile enough to utilize a variety of fuel cell systems from many different manufacturers."

This program follows several successful advanced technology efforts between the State of Hawaii and Enova including fast charging, electric powered Hyundai SUVs, an electric 120kW thirty-foot bus (also at Hickam) and a multi-car tram system.

"Having worked with Enova on several other programs, the U.S. Air Force is confident of Enova's record of accomplishment," stated Carl Perazzola, Chief, Advanced Power Technology Office, Robins Air Force Base. "The Air Force is encouraged by Enova's modular approach to product development for commercialization. Plug and play is what the Air Force needs."

This news release contains forward-looking statements relating to Enova Systems and its products. These forward-looking statements are subject to and qualified by certain risks and uncertainties. Such statements do not imply the future success of the Company or its products. These risks and uncertainties and other risks are detailed from time to time in Enova Systems' periodic filings with the Securities and Exchange Commission under the name Enova Systems, Inc., including but not limited to Enova's annual report on Form 10-K for the year ended December 31, 2002. Enova assumes no duty to update these statements.