Active Power to Present at Thomas Weisel Partners Alternative Energy and Natural Resources Conference

Active Power is scheduled to present on Tuesday, Nov. 10, 2009, at 4:25 p.m. (ET) with one-on-one meetings with management held throughout the day. The presentation will be available via Webcast here.

Jim Clishem, president and CEO at Active Power, will discuss trends emerging in the $8 billion global market for uninterruptible power supply (UPS) systems and the increasing need for energy and space efficient solutions to support mission critical operations. Clishem will also discuss the company's largest order to date from a leading search engine provider and the increased market traction with its containerized power and cooling product offering.

For more information about the conference or to schedule a one-on-one meeting with Active Power, please contact your Thomas Weisel Partners representative or the corporate events desk at +1-415-364-2500.

About Active Power

Active Power (NASDAQ: ACPW) provides efficient, reliable and green critical power solutions and uninterruptible power supply (UPS) systems to enable business continuity in the event of power disturbances. Founded in 1992, Active Power's flywheel-based UPS systems protect critical operations in datacenters, healthcare facilities, manufacturing plants, broadcast stations and governmental agencies in more than 40 countries. With expert power system engineers and worldwide services and support, Active Power ensures organizations have the power to perform. For more information, please visit www.activepower.com.

Cautionary Note Regarding Forward-Looking Statements

This release may contain forward-looking statements that involve risks and uncertainties. Any forward-looking statements and all other statements that may be made in this news release that are not historical facts are subject to a number of risks and uncertainties, and actual results may differ materially. Specific risks include delays in new product development, product performance and quality issues and the acceptance of our current and new products by the power quality market. Please refer to Active Power filings with the Securities and Exchange Commission for more information on the risk factors that could cause actual results to differ.

Active Power, CleanSource and CoolAir are registered trademarks of Active Power, Inc. The Active Power logo and PowerHouse are trademarks of Active Power, Inc. All other trademarks are the properties of their respective companies.

Active Power Investor Contact:
Liolios Group
Ron Both, 949-574-3860
ron@liolios.com
or
Active Power Media Contact:
Lee Higgins, 512-744-9488
Public Relations Manager
lhiggins@activepower.com