Leading Diesel Engine Manufacturer Purchases Proven Flywheel Technology with More than 53 Million Hours of Field Runtime

AUSTIN, Texas (Dec. 8, 2008) – Active Power, Inc. (NASDAQ: ACPW), inventor and manufacturer of the most energy-efficient critical power systems in the world, today announced an order from AGCO Sisu Power (formerly Sisu Diesel) for two 1000 kVA UPS (uninterruptible power supply) systems, part of Active Power’s Megawatt Class CleanSource® UPS product line. The two systems will be deployed at a mission critical data center facility located outside of Helsinki, Finland, in Espoo. The facility is owned by Tapiola Group, a large financial services firm. The systems are scheduled to be shipped in February 2009.

“Active Power’s flywheel UPS technology is ideal for data center applications where downtime due to power disturbances just isn’t an option,” said Jim Murphy, vice president of Sales, EMEA and APAC for Active Power. “The 1000 kVA unit is a customized system configuration based on our Megawatt Class UPS platform and is best-in-class at meeting high power needs for mission critical applications – as in this case with AGCO Sisu Power. As a measure of market acceptance and proven reliability, Active Power has shipped more than 2,000 flywheels worldwide and our systems have logged more than 53 million hours of field runtime.”

AGCO Sisu Power supplies engines to many of the world's leading manufacturers of tractors and other farm machinery, manufacturing more than 40,000 diesel engines annually with more than 800 employees. The company’s products are used in applications around the globe. A leader in engine technology, the company’s engines can be run on environmentally friendly biofuels. 

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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 data centers, 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.