Satcon Added to Russell 3000 Index

Annual reconstitution of Russell's U.S. indexes captures the 4,000 largest U.S. stocks as of the end of May, ranking them by total market capitalization. Membership in the Russell 3000, which remains in place for one year, means automatic inclusion in the large-cap Russell 1000 Index or small-cap Russell 2000 Index as well as the appropriate growth and value style indexes. Russell determines membership for its equity indexes primarily by objective, market-capitalization rankings and style attributes. The Russell 3000 also serves as the U.S. component to the Russell Global Index, which Russell launched in 2007.

"We are very pleased to have been included in this year's reconstitution of Russell Indexes as it will generate greater interest in our stock among institutional investors," said Steve Rhoades, President and Chief Executive Officer of Satcon. "The company has been very focused on building shareholder value and driving performance of our renewable energy solutions business, and inclusion in this credible global equity index is a clear indication of our progress."

Russell indexes are widely used by investment managers and institutional investors for index funds and as benchmarks for both passive and active investment strategies. Russell estimates that $4.4 trillion in assets currently are benchmarked to their indexes. More information on the Russell 3000 and other Russell Indexes is available at http://www.russell.com.

About Satcon

Satcon Technology Corporation is a leading provider of utility scale distributed power solutions for the renewable energy market, enabling the industry's most advanced, reliable and proven clean energy alternatives. For over 24 years, Satcon has designed and delivered the next generation of efficient energy systems for solar photovoltaic, stationary fuel cells, wind-turbines, and energy storage systems. To learn more about Satcon, please visit www.Satcon.com.

Safe Harbor

Statements made in this press release 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 "will," "intends," "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. Additional information concerning risk factors is contained from time to time in the company's SEC filings, including its Annual Report on Form 10-K and other periodic reports filed with the SEC. Forward-looking statements contained in this press release speak only as of the date of this release. Subsequent events or circumstances occurring after such date may render these statements incomplete or out of date. The company expressly disclaims any obligation to update the information contained in this release.

Satcon Technology Corporation
Leah Gibson, 617-897-2400
Investor Relations Manager
leah.gibson@Satcon.com