Enova Systems Continues Major Role in Fuel Cell Vehicle Sector

TORRANCE, Calif.--April 28, 2005--Enova Systems (OTCBB:ENVA), a manufacturer and developer of electric hybrid and fuel cell drive systems announces that it continues to gain momentum in the fuel cell vehicle markets with the addition of three new or ongoing projects in these sectors. The latest program teams Enova with Concurrent Technologies Corporation (CTC), an independent, nonprofit, applied research and development professional services organization that provides management, integration, and technology-based solutions to a wide array of clients. Enova will supply its 120kW HybridPower(TM) drive system and its fuel cell power management suite to the U.S. Department of Defense (DoD) Fuel Cell Test and Evaluation Center (FCTec), which is operated by CTC. These components will be integrated into an MB-4 aircraft tow tractor by CTC and Enova. This vehicle will be used in fuel cell demonstrations at select Air Force Bases and civil airports in the United States, in conjunction with the United States Air Force Advanced Power Technology Office, Warner-Robins AFB, Georgia.

"We are fortunate to be teaming with CTC because of its expertise in integration and the opportunity to showcase Enova's hybrid drive system and fuel cell power management technologies in this expanding sector of clean ground service equipment," said Ed Riddell, president & CEO of Enova. "This is our first joint undertaking with CTC and we anticipate many other ventures of this kind between our companies as we continue to expand our markets in the U.S."

"FCTec's mission is to accelerate the development and commercialization of fuel cell systems by providing research, development, and test and evaluation services to Government and private Industry," said Daniel R. DeVos, CTC's President & CEO. "We are pleased to be teaming with Enova Systems on this effort and are confident that this partnership will produce a successful fuel cell integration and demonstration project."

This latest program will capitalize on Enova's success in both hybrid fuel cell vehicle propulsion systems and our experience in customization and integration for varying driving cycle applications. In 2004, Enova integrated its HybridPower 120kW drive system, with a Capstone microturbine in another MB-4 tow tractor for the U.S. Air Force which is now in operation at Hickam Air Force Base in Honolulu, Hawaii. The U.S. Air Force's hybrid tow tractor's configuration consists of Enova's HybridPower 120kW drive system integrated with Enova's Dual 8kW inverter, 380V DC/DC converter, an advanced version of its proven, successful Hybrid Control Unit and a Mobile Fuel Cell Generator, incorporating a Hydrogenics fuel cell power generation module and a battery pack.

In a second project, Enova contracted with the High Technology Development Corporation (HTDC) in Hawaii to develop, integrate, deliver and evaluate a fuel cell hybrid "step" van for Hickam Air Force Base in Honolulu. With funding from the Hawaii Center for Advanced Transportation Technologies (HCATT), Enova will integrate its HybridPower 120kW drive system and fuel cell power management systems into the Workhorse van for routine base operations and have the capability to serve as a Ground Power Unit for the Air Force to power up aircraft and equipment during maintenance operations.

"HCATT continues its over 10-year relationship with Enova because of its dedication to product quality, innovation and customer support," said Tom Quinn, Director, HCATT (a department within the HTDC). "Our entire electric and hybrid-electric fleet is powered by Enova's technologies and we are excited to be working with Enova once again."

Considered one of the largest sources of localized air pollution, airports have been targeted for specific pollution reduction measures supported by the U.S. Hydrogen Initiative and Clean Air Act. Demonstration projects such as this allow the fuel cell and aviation industry to explore such measures and expand their operational knowledge of fuel cell systems as it relates to their full range of capabilities and performance expectations.

In late 2004, Enova also teamed with Hydrogenics to develop and deploy a fuel cell hybrid delivery van for Purolator Courier Ltd., Canada's leading courier company, as part of its "Greening the Fleet" initiative to explore the use of clean transportation technologies. Enova supplied its HybridPower 120kW drive system and fuel cell power management systems, as well as integration assistance for this project, which is currently in its evaluation phase prior to commission to Purolator's delivery fleet.

About CTC

CTC is an independent, nonprofit, applied research and development professional services organization providing management and technology-based solutions to a wide array of clients representing state and federal government as well as the private sector. Established in 1988, CTC operates from more than 35 locations with a staff of over 1,400 employees. For more information about CTC, visit www.ctc.com.

About FCTec

The U.S. Department of Defense (DoD) Fuel Cell Test and Evaluation Center (FCTec) is a national resource facility for the independent, unbiased testing and validation of fuel cell systems for both military and commercial applications. The FCTec's primary goal is to significantly accelerate the development and commercialization of fuel cell systems, fuel infrastructure, and fuel processor systems through comprehensive research, development, test and evaluation, integration, and optimization services. For more information about the FCTec, please visit www.fctec.com.

About HTDC

HTDC is a State agency tasked with the development and growth of Hawaii's commercial high technology industry. It provides broad based programs ranging from incubation to federal research and development partnerships.