AUSTIN, Texas – Oct. 29, 2009 – Active Power, Inc. (NASDAQ: ACPW) has received notification from the NASDAQ Listing Qualifications department that the company has regained compliance with the $1.00 minimum bid price requirement for continued listing set forth in NASDAQ Listing Rule 5450(a)(1) (the “Minimum Bid Price Rule”).

As previously announced on Aug. 18, 2008, NASDAQ notified Active Power that its common stock failed to maintain a minimum bid price of $1.00 over the previous 30 consecutive business days as required by the Minimum Bid Price Rule. Active Power was granted a grace period of 180 days in which to regain compliance. NASDAQ subsequently notified Active Power of suspension of its enforcement of the Minimum Bid Price Rule, most recently until Dec. 2, 2009. Since the time of such notifications, the closing bid price of the company’s common stock has been at $1.00 per share or greater for at least 10 consecutive business days. Accordingly, the company has regained compliance.

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.