BCON Beacon Power Corp (MM)

Beacon Power Corporation (Nasdaq:BCON), a leading provider of fast-response energy storage systems and services to support a more stable, reliable and efficient electricity grid, today announced that the Company will release its financial results for the quarter ended June 30, 2011, on August 9, 2011, prior to the opening of the market, and host a conference call at 11:00 am Eastern Time that day. During the call, Bill Capp, Beacon Power president and CEO, and Jim Spiezio, CFO, will review the Company's operations and results, followed by a question and answer session.

Beacon Power invites all those interested in hearing management's discussion to join the call by dialing 708-290-1368 and entering participant access code 85801344 when prompted. A live webcast of the call will also be available via the Company's website, at www.beaconpower.com. Please connect at least 15 minutes prior to the webcast to ensure adequate time for any software download that may be needed.

A replay of the event will be available approximately two hours after its completion, and for seven days following the call, by dialing 404-537-3406 and entering access code 85801344 when prompted. The webcast will also be archived on the Beacon website at www.beaconpower.com.

About Beacon Power Corporation

Beacon Power Corporation designs, develops and is commercializing advanced products and services to support stable, reliable and efficient electricity grid operation. Beacon's Smart Energy MatrixTM, now in production, being operated and earning revenue, is a non-polluting, megawatt-scale, fast-response flywheel-based solution designed to provide less expensive, more sustainable and effective frequency regulation services to the nation's power grid. The Company's business strategy is both to supply frequency regulation services from its own plants and to sell systems directly to utilities or grid operators in parts of North America and selected international markets. Beacon is a publicly traded company with its research, development and manufacturing facility in the U.S. For more information, visit www.beaconpower.com.

CONTACT: Beacon Investor Relations Contact:
         Chris Witty
         Darrow Associates
         646-438-9385
         cwitty@darrowir.com