Beacon Power to Be Featured in Massachusetts Pavilion at Hannover Fair 2006, World's Largest Energy Exhibition.

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, announced that it will be one of six companies featured in the Massachusetts Pavilion at the Hannover Fair 2006, one of the world's largest technology trade shows. The annual event runs from April 24-28, and is attended by more than 200,000 visitors. Beacon Power will be in Hall 13, Stand F60.

Beacon was approved by the Massachusetts Office of International Trade and Investment as one of six Massachusetts-based technology companies to exhibit at the show. The costs for exhibiting are paid for by the Renewable Energy Trust of the Massachusetts Technology Collaborative (MTC). The MTC is the state's development agency for renewable energy and the innovation economy, and the Renewable Energy Trust makes investments in and supports the renewable energy industry.

"Participating in the Hannover Fair is a tremendous opportunity for companies to develop new market opportunities for their clean energy technologies," said Renewable Energy Trust Director Warren Leon. "We are working with dynamic companies like Beacon to help create new jobs and economic opportunity in the growing clean energy cluster across Massachusetts."

At the Hannover Fair, Beacon will present the latest information on its flywheel energy storage systems for grid frequency regulation and other applications, and discuss its performance in scale-power demonstrations. Beacon currently has a scale-power Smart Energy Matrix demonstration system installed in California, and one soon to be installed in New York. The goal of these two demonstrations is to show that Beacon's flywheel-based energy storage systems can meet the requirements for providing frequency regulation services on the grid. Beacon believes that the same service could also be provided in Europe and elsewhere.

Energy is one of the primary themes of this year's Hannover Fair, with a focus on energy efficiency, the secure and competitive supply of energy, and new technology integration. The event is international in scope, with specific attention paid to European requirements. The Hannover Fair is one of the only global events that offers information covering the entire spectrum of energy generation, supply, conversion and distribution - from conventional to renewable forms. More information is available at www.hannovermesse.de.

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 thereby 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.

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 or supplying frequency regulation services on a commercial basis; limited commercial contracts for sales to date; 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 recent volatility in the stock price of companies operating in the same sector; 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.