Enova's Unique Proprietary Post Transmission Hybrid Drive System Installed in First Production Hybrid School Buses

TORRANCE, Calif.--Enova Systems (AMEX:ENA) (AIM:ENV) (AIM: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, is pleased to announce that its unique proprietary Post Transmission hybrid systems are being used to help power the nation’s first production Hybrid School Buses via IC Corp. Florida’s Manatee School district is the first in the nation to receive the production Hybrid School Buses. The buses were officially delivered on Friday, March 9th, 2007.

Other school districts around the country will soon be receiving the remaining seventeen (17) IC Corporation hybrid school buses awarded by Advanced Energy. Manatee School District’s two (2) hybrid school buses are part of the nineteen (19) hybrid buses awarded nationwide by Advanced Energy, a non-profit corporation that initiated a buyer’s consortium of school districts, state energy agencies and student transportation providers.

Mike Staran, Enova’s Executive Vice President, said: “Enova Systems’ unique Post Transmission System continues to offer a non-invasive solution to enter the hybrid vehicle market in either the retrofit or new vehicle segment. We are privileged to be partnered with IC Corp., the nation’s largest School Bus manufacturer, in this groundbreaking effort.”

Enova’s Post Transmission System has proven, in other applications, to be a non-invasive system that has required little to no modification to chassis, body, instrument panel, etc. In addition, the system does not intrude on nor require any alteration to the Engine Control/Communication system, thus avoiding any emissions certification issues. The system monitors but does not impact anything within the existing engine and does not effect the existing engine calibration. The hybrid system can be designed as either a Charge Sustaining or Charge Depleting (“Plug In”) system. The Charge Sustaining System utilizes relatively small batteries which are maintained within specified range of State of Charge (SOC) over the entire drive cycle. Battery charge is maintained by the on-board equipment and is not normally recharged from the grid except as needed for cell balancing. The Charge Depleting System utilizes a larger battery based on advanced battery chemistry that provides stored energy intended to be drawn down over the driving cycle, thus optimizing fuel economy, subsequent to an overnight charge.

Depending on the route, fuel economy miles per gallon (mpg) improvement is from 30% to 55% or better for a Post Transmission Charge Sustaining System, and 70-100% or better for Post Transmission Charge Depleting Systems. Emission improvements vary with the pollutant being measured and has shown up to a 90% improvement at times on Particulate Matter based on load and operating condition dependent.

Enova has also partnered with IC Corporation to provide hybrid systems for their new line of hybrid commercial buses. The bus market in which IC Corporation plans to compete is approximately 18,000 units annually. The market can be broken into 2 primary segments - public and private. It is now estimated that 30% of the buses purchased for public transit are some form of hybrid/alternate fuel vehicles and analysts project this number to grow significantly over the next 5 years. Enova’s Post Transmission system is also used by the US Military, Mack Truck and most recently on thirteen (13) Verizon service vans. Enova expects volumes for the systems to increase as customers realize the benefits that it offers for both the new and retrofit markets.

Additional Information:

This news release contains forward-looking statements relating to Enova Systems and its products that are intended to be covered by the safe harbor for forward-looking statements provided by the Private Securities Litigation Reform Act of 1995. Forward-looking statements are statements that are not historical facts. These statements can be identified by the use of forward-looking terminology such as "believe," "expect," "may," "will," "should," "could," "project," "plan," "seek," "intend," or "anticipate" or the negative thereof or comparable terminology and statements about industry trends and Enova’s future performance, operations and products. These forward-looking statements are subject to and qualified by certain risks and uncertainties. These and other risks and uncertainties are detailed from time to time in Enova Systems’ periodic filings with the Securities and Exchange Commission, including but not limited to Enova’s annual report on Form 10-K for the year ended December 31, 2005.

This forward-looking information should be considered only in connection with the aforementioned risk factors. Enova assumes no obligation to update such forward-looking statements.

About Enova Systems, Inc.

Enova Systems (AMEX:ENA) (AIM:ENV) (AIM:ENVS) is a leading supplier of efficient, environmentally friendly digital power components and systems products. The Company’s core competencies are focused on the development and commercialization of power management and conversion systems for mobile and stationary 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 drive systems and related components for electric, hybrid-electric and fuel cell powered vehicles. For further information, contact Enova Systems directly, or visit its Web site at http://www.enovasystems.com

About IC Corporation

IC Corporation is a wholly owned subsidiary of Navistar International Corporation (OTC:NAVZ). The nation’s largest integrated manufacturer of school buses, IC Corporation is a leader in passenger protection, chassis design, engines and ergonomics. The company is also a producer of commercial buses. All IC Corporation buses are sold, serviced and supported through a renowned dealer network that offers an integrated customer program encompassing parts, training and service. Additional information is available on site at: http://www.ic-corp.com.