Cobasys NiMHax Battery Systems to Power Verizon Hybrid Service Vans

ORION, Mich., May 21, 2007 -- Cobasys, a leader in advanced, integrated energy storage system solutions, today announced it has supplied its patented Nickel Metal Hydride (NiMH) NiMHax(R) battery systems to Enova Systems for integration into specially designed hybrid service vans for Verizon. The service van program will make Verizon the first major U.S. company to retrofit vans with hybrid power technology for use in their fleet.

As part of North America's second largest fleet operation, the Verizon vans will be equipped with Enova's Post Transmission Parallel Hybrid Drive System supported with the Cobasys powerful, light weight, compact, liquid- cooled NiMHax 336-70 battery system. The NiMHax battery system utilizes Cobasys' flexible high power Series 1000 battery module and incorporates all necessary features that enable fully integrated "plug-and-play" capabilities. System features include: integrated battery management system hardware and software, redundant safety controls, packaging, wiring, and thermal management based on newly developed liquid cooling systems for optimized performance in high power Hybrid Electric Vehicle (HEV) application. Fully integrated control algorithms have also been implemented to help optimize the energy management functions and product durability.

"Our advanced energy storage system solutions offer a completely integrated "plug-and-play" battery pack ready for customer use," stated Scott Lindholm, Vice President of Systems Engineering and Chief Sales Officer at Cobasys. "As a recognized innovator in hybrid battery system technology, Cobasys is delighted to be a part of Enova and Verizon's leading-edge hybrid program."

With the addition of Verizon's precedent-setting service van program, Cobasys has been awarded numerous contracts to supply its hybrid battery and control system solutions for major HEV production and/or development programs both in North America and Europe. Cobasys' battery systems continue to play a key strategic role as companies look for solutions to reduce energy dependence and impact on the environment. Previously announced Company hybrid program awards include: Saturn Vue, Saturn Aura, Chevrolet Malibu, Lotus Engineering "EVE" and most recently, Armor Holdings military vehicle application.

About Cobasys

Cobasys designs, manufactures and integrates advanced energy storage system solutions for transportation markets, including Hybrid Electric Vehicles (HEV), Electric Vehicles (EV) and 36/42 Volt applications, and stationary markets, including Back-Up power supply systems for Uninterruptible Power Supply (UPS), Telecom and Renewable Energy applications.

Cobasys is a joint venture between Chevron Technology Ventures LLC, a subsidiary of Chevron Corporation and Energy Conversion Devices, Inc. .

For more information about Cobasys, contact Ray Wagner at 248-620-5700 or visit our website at www.cobasys.com.

About Enova

Enova Systems, (AMEX:ENA) (AMEX:and) (AMEX:AIM:) (AMEX:ENV) (AMEX:and) (AMEX:ENVS) , an early stage production company in an emerging industry and a leading developer of proprietary electric, hybrid and fuel cell digital power management systems. The Company's core competencies are focused on the development and commercialization of power management and conversion systems for mobile applications. Enova applies unique 'enabling technologies' in the areas of alternative energy propulsion systems for light and heavy-duty vehicles as well as power conditioning and management systems for distributed generation systems. The Company develops, designs and produces non-invasive drive systems and related components for electric, hybrid-electric, and fuel cell powered vehicles in both the "new" and "retrofit" vehicle sales market. For further information, contact Enova Systems directly, or visit its Web site at http://www.enovasystems.com/.