SatCon Introduces New 500kW Photovoltaic Inverter; SatCon's Solar Power Inverters Now Include 50kW, 100kW, 225kW and 500kW Sizes.

CAMBRIDGE, Mass. -- SatCon Technology Corporation(R) (Nasdaq NM: SATC), a developer and manufacturer of power electronics and control systems, today announced the launch of its new 500kW grid connected PowerGate(TM) Photovoltaics inverter with recent orders for the North American market. The 500kW unit rounds out SatCon's family of solar array inverters, including designs for 50kW, 100kW, 225kW and 500kW three-phase applications, and designs for 15 - 30kW single-phase applications. SatCon's products provide a more cost effective alternative for solar integrators by eliminating many of the independent components and field wiring required by other designs. SatCon's photovoltaic inverters include all of the necessary equipment to convert solar array DC power to useable AC power and also allow the excess to be sold back to local utilities.

SatCon's PowerGate PV inverters are designed to meet UL1741 certification, which then qualifies them to be listed by the California Energy Commission (CEC). These certifications enable SatCon's PV inverters to be eligible for California state-sponsored rebate programs, such as the California Public Utilities Commission (CPUC) Self Generation Incentive Program. In 2004, the CPUC program made available over $90 million in rebates for new solar array installations. This past year, SatCon generated over 10% of its new business in alternative energy technologies and products.

"We continue to see the alternative energy sector as a significant market for the future," said David Eisenhaure, president and CEO of SatCon Technology. "We've not only invested efforts in the photo voltaics markets, but in fuel cell energy systems as well. Both of these build off the work we are doing on the U.S. Navy's all-electric ship program and with our Rotary UPS systems. We are building a whole family of power control products with common architectures that can be applied over several markets. We believe that the market for alternative energy technologies will continue to experience significant growth and wider acceptance both in the United States and abroad. We believe that we are well-positioned to take advantage of that growth."

About SatCon Technology Corporation

SatCon Technology Corporation manufactures and sells power control systems for critical military systems, alternative energy and high-reliability industrial automation applications. Products include inverter electronics from 5 kilowatts to 5 megawatts, power switches, and hybrid microcircuits for industrial, medical, military and aerospace applications. SatCon also develops and builds digital power electronics, high-efficiency machines and control systems for a variety of defense applications with the strategy of transitioning those technologies into multiyear production programs. For further information, please visit the SatCon website at www.satcon.com.

Statements made in this document that are not historical facts or which apply prospectively are forward-looking statements that involve risks and uncertainties. These forward-looking statements are identified by the use of terms and phrases such as "believes," "expects," "plans," "anticipates" and similar expressions. Investors should not rely on forward looking statements because they are subject to a variety of risks and uncertainties and other factors that could cause actual results to differ materially from the Company's expectation. There can be no assurance that the Company will continue to receive orders for these 500kW converters or any future orders from the alternative energy marketplace for any of its PV converter products. Additional information concerning risk factors is contained from time to time in the Company's SEC filings. The Company expressly disclaims any obligation to update the information contained in this release.