Active Power Files Shelf Registration Statement

Active Power

, manufacturer of uninterruptible power supply (UPS) systems and modular infrastructure solutions, announced today that it has filed a universal shelf registration statement on Form S-3 with the Securities and Exchange Commission (the "SEC"). The shelf registration statement is designed to provide the Company with greater flexibility to take advantage of financing and other business opportunities when and if such opportunities arise, subject to market conditions and the capital requirements of the Company. If and when the shelf registration statement is declared effective, it will permit the Company, from time to time, to offer and sell up to $50.0 million of common stock, preferred stock, depository shares, warrants, debt securities, units comprised of any such securities, or any combination thereof in one or more future public offerings. The actual amount and type of securities and the terms of those securities will be determined at the time of sale, if such sale occurs. At the present time, the Company has no specific use of proceeds or plans to offer any of the securities covered by the registration statement. A registration statement relating to the securities listed in the shelf registration statement has been filed with the SEC, but has not yet become effective. These securities may not be sold, nor may offers to buy be accepted prior to the time the registration statement becomes effective. This press release shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of these securities in any state in which such offer, solicitation, or sale would be unlawful prior to registration or qualification under the securities laws of any such state. About Active Power Founded in 1992, Active Power

designs and manufactures uninterruptible power supply (UPS) systems and modular infrastructure solutions that enable data centers and other mission critical operations to remain 'on' 24 hours a day, seven days a week. The combined benefits of its products' power density, reliability, and total cost of ownership are unmatched in the market and enable the world's leading companies to achieve their most forward thinking data center designs. The company's products and solutions are built with pride in Austin, Texas, at a state-of-the-art, ISO 9001:2008 registered manufacturing and test facility. Global customers are served via Austin and three regional operations centers located in the United Kingdom, Germany, and China, that support the deployment of systems in more than 50 countries. For more information, visit www.activepower.com. Cautionary Note Regarding Forward-Looking Statements This press release contains certain forward-looking statements that involve risks and uncertainties, including statements regarding the sale of securities under the shelf registration statement. Such statements are only predictions. Actual results could differ materially from these statements and the company may be unable to complete any sale of securities under the shelf registration statement due to a number of factors. These factors include unfavorable market conditions and other risk factors that are more fully discussed in the shelf registration statement and in the company's periodic reports and other filings with the SEC.