Beacon Power CEO to Present at Major Investor Conference.

WILMINGTON, Mass. -- Beacon Power Corporation (NASDAQ: BCON), a company that designs and develops advanced products and services to support more stable and reliable electricity grid operation, has announced that Bill Capp, its President and CEO, will be presenting on September 20, 2005, at 4:00 PST, at the 2nd Annual Investor Summit, organized in San Francisco by Merriman Curhan Ford & Co.

Mr. Capp's presentation will focus on Beacon Power's business direction, technology developments and current activities. He will also highlight the company's progress in addressing the grid frequency regulation market, including the two flywheel energy storage systems Beacon is building for upcoming demonstrations in California and New York.

The Beacon presentation slides and audio will be available via live webcast at http://www.wsw.com/webcast/mcm2/bcon/. In order to access the presentation, viewers must first register on the webcast site. Presentation contents will also be posted and archived on Beacon's website within 24 hours.

Merriman Curhan Ford & Co., a subsidiary of MCF Corporation (AMEX: MEM), is a securities broker-dealer and investment bank focused on fast-growing companies and growth-oriented institutional investors. It provides investment research, brokerage and trading services primarily to institutions, as well as advisory and investment banking services to corporate clients. Its Investor Summit, which takes place from Sept. 19-21, 2005, at the Mark Hopkins InterContinental Hotel, is expected to draw more than 1,000 attendees and feature more than 130 presenting companies from a number of industry sectors. The agenda and other information can be found at www.merrimanco.com.

About Beacon Power

Beacon Power Corporation designs sustainable energy storage and power conversion solutions that would provide reliable electric power for the utility, renewable energy, and distributed generation markets. Beacon's Smart Energy Matrix is a design concept for a megawatt-level, utility-grade flywheel-based energy storage solution that would provide sustainable power quality services for frequency regulation, and support the demand for reliable, distributed electrical power. Beacon is a publicly traded company with its research, development and manufacturing facility in the U.S. For more information, visit www.beaconpower.com.

For more information, please contact James Spiezio, Chief Financial Officer; phone [phone]; fax [phone]; email [e-mail]; or write to Beacon Power Corporation, 234 Ballardvale Street, Wilmington, MA 01887.

Safe Harbor Statements under the Private Securities Litigation Reform Act of 1995:

Material contained in this press release may include statements that are not historical facts and are considered "forward-looking" within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements reflect Beacon Power Corporation's current views about future events and financial performances. These forward-looking statements are identified by the use of terms and phrases such as "believe," "expect," "plan," "anticipate," and similar expressions identifying forward-looking statements. Investors should not rely on forward-looking statements because they are subject to a variety of risks, uncertainties, and other factors that could cause actual results to differ materially from Beacon Power Corporation's expectation. These factors include: a short operating history; a history of losses and anticipated continued losses from operations; a need to raise additional capital combined with a questionable ability to do so; conditions in target markets; no experience manufacturing any product on a commercial basis; limited commercial contracts for sales to date; little experience managing operations in geographically dispersed locations; the dependence of sales on the achievement of product development and commercialization milestones; the uncertainty of the political and economic climate of any foreign countries into which Beacon hopes to sell or in which it operates, including the uncertainty of enforcing contracts and the potential substantial fluctuation in currency exchange rates in those countries; significant technological challenges to successfully complete product development; dependence on third-party suppliers; intense competition from companies with greater financial resources; possible government regulation that would impede the ability to market products; possible product liability claims and the negative publicity which could result; any failure to protect intellectual property; the possible need in the future to hire and retain key executives, particularly in light of the substantial workforce reductions during 2001 and 2002; the volatility in the stock price of companies operating in the same sector; the difficulties that often arise in integrating operations of companies after a merger or acquisition; the power of controlling shareholders and the limited ability of others to influence the outcome of matters put to the vote of shareholders. These factors are elaborated upon and other factors may be disclosed from time to time in Beacon Power Corporation's filings with the Securities and Exchange Commission. Beacon Power Corporation expressly does not undertake any duty to update forward-looking statements.