SatCon and Cummins Bridgeway Enter Distributor Agreement for SatCon's Rotary UPS Systems.

BOSTON -- SatCon Technology Corporation(R) (NASDAQ NM: SATC), a manufacturer of electronic power control systems, today announced that SatCon Power Systems and Cummins Bridgeway have entered into a Supplier Distributor agreement to promote the sale of SatCon's Rotary UPS (Uninterruptible Power Supply) and other power quality/reliability products to end users who have critical needs for high-quality, "always-on" power. SatCon Power Systems has already installed two Rotary UPS systems. A third system is scheduled for delivery to the National Institute of Standards and Technology ("NIST") in Boulder, Colorado in the spring of 2005.

Danny E. Dorsey, Vice President, Power Generation for Cummins Bridgeway, LLC said, "With SatCon's Rotary UPS and its other fine power quality and reliability products we can now offer customers in our territory a high quality solution to their critical power needs. The Rotary UPS system is capable of providing back-up power to factories, hospitals, water treatment plants, universities and any facility that requires an uninterruptible power source. We look forward to building a large base of users in our territory."

Dave Eisenhaure, SatCon's President and CEO said, "This is another significant step in building a global distribution network for SatCon's Rotary UPS systems. This is the second marketing agreement for our Rotary UPS system within the Cummins distributor organization, a major supplier of power generation equipment. The Rotary UPS systems we have installed have been working very well. Cummins Bridgeway Power will provide us with a significant market presence in a large market area in the Midwest. Our plan is to continue to establish our relationships with Cummins distributors throughout North America and Asia."

SatCon's Rotary UPS performs the functions of both back up power and power quality conditioning. As a power quality conditioner, it helps to provide reliable, high quality power by constantly conditioning incoming power from the electric utility grid. In case of a power outage, it acts as a substitute for the electric utility, instantaneously converting the energy stored in its flywheel to electricity, which powers the facility while its integral engine-generator starts or the utility power returns.

Cummins Bridgeway, one of only 22 Cummins distributors in North America, delivers Cummins engine and power generation products and service support throughout Michigan, Ohio and Western Pennsylvania. Cummins Bridgeway has over 600 employees to service the major metropolitan areas of Detroit and Grand Rapids, Michigan; Toledo, Cleveland, Columbus and Cincinnati, Ohio; and Pittsburgh, Pennsylvania. Cummins Bridgeway home page can be found at www.cumminsbridgeway.com.

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 sell any additional Rotary UPS systems as a result of this agreement. 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.