Customer to Deploy More than 16 Megawatts of Highly Efficient and Reliable Flywheel UPS Systems 

AUSTIN, Texas – Oct. 14, 2009 – Critical backup power systems manufacturer Active Power, Inc. (NASDAQ: ACPW) today announced it has received a second multimillion dollar order from one of the world’s largest Internet search engine providers for more than 16 megawatts of its CleanSource UPS (uninterruptible power supply) systems.

The order will be deployed at one of the customer’s mission critical datacenter facilities located in the United States. Equipment will begin shipping later this quarter with installation taking place in early 2010.

“Many of the industry’s largest service providers are choosing to deploy highly energy and space efficient flywheel UPS systems from Active Power to protect their datacenter operations,” said Jim Clishem, president and CEO, Active Power. “The substantial size of this deployment from a repeat customer demonstrates confidence in our solutions and validates our value proposition for mission critical clients.”

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.