Satcon Selected by Constellation Energy for 65 MW of PV Projects

Satcon Technology Corporation® (NASDAQ CM: SATC), a leading provider of utility-scale power conversion solutions for the renewable energy market, today announced that it has been selected by Constellation Energy (NYSE: CEG) for 65 megawatts (MW) of photovoltaic power projects across the United States. The installations feature a variety of different panel technologies (thin film, polycrystalline) and array types (ground mount, rooftop) and will utilize Satcon inverters.

The largest of these solar power projects is for an aggregate 25 MW of ground mounted PV power plants located near Sacramento, California. These advanced utility-scale facilities feature twenty-five Satcon PowerGate Plus 1 MW inverters. Constellation Energy will own and operate the systems and sell the electricity generated from them to the Sacramento Municipal Utility District (SMUD) under ten, 20-year power purchase agreements. Belectric, Inc. is the engineering, procurement and construction contractor for the project which is anticipated to be commercially operational by the end of 2011.

In addition to the Sacramento installations, Satcon has also been selected for a 5 MW rooftop system, which, when complete, will be one of the largest rooftop PV installations in North America. The system will use thirteen Satcon PowerGate Plus 500 kW inverters and is expected to generate approximately 6,362 megawatt-hours (MWh) of electricity each year.

The remaining Constellation Energy systems will use Satcon PowerGate Plus 500 kW or Equinox 500 kW inverters, part of Satcon’s industry leading portfolio of utility-scale power conversion solutions with over 2 gigawatts (GW) sold worldwide, the world’s most widely deployed large-scale solar solutions.

“We believe that system design should always be based on customer needs and the requirements of the site,” said Ron Melchior, Vice President of Renewable Energy for Constellation Energy's retail business. “Satcon’s technology and ability to tailor each power conversion solution to each installation made them the logical choice for these solar power projects.”

“These 65 megawatts of solar power installations across the U.S. demonstrate the strong growth we are seeing in the North American utility-scale solar power market,” said Steve Rhoades, Satcon's President and Chief Executive Officer. “We look forward to working closely with Constellation now and in the future to drive further penetration of utility-scale solar power in North America.”

About Constellation Energy

Constellation Energy (www.constellation.com) is a leading competitive supplier of power, natural gas and energy products and services for homes and businesses across the continental United States. It owns a diversified fleet of generating units, totaling approximately 12,000 megawatts of generating capacity, and is a leading advocate for clean, environmentally sustainable energy sources, such as solar power and nuclear energy. The company delivers electricity and natural gas through the Baltimore Gas and Electric Company (BGE), its regulated utility in Central Maryland. A FORTUNE 500 company headquartered in Baltimore, Constellation Energy had revenues of $14.3 billion in 2010.

About Satcon

Satcon Technology Corporation is the leading provider of utility-scale power conversion solutions for the renewable energy market, enabling the industry’s most advanced reliable and proven clean energy alternatives. For over 26 years, Satcon has designed and delivered the next generation of efficient energy systems for solar photovoltaic, stationary fuel cells, and energy storage systems. To learn more about Satcon, please visit www.Satcon.com.

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