Austin, Texas – September 12, 2003 -- Active Power, Inc. (NASDAQ:ACPW), a leading manufacturer of battery-free power quality products, announces two important milestones: the initial order of the international version of its new high power Uninterruptible Power Supply (UPS), a 1000 kVA unit; and the shipment of its first 1200 kVA system. The flywheel-based UPS 1000, which will ensure quality power is delivered to critical medical equipment, will be delivered to a hospital in Belgium later this year. The 1200 kVA unit shipped to a customer in Illinois, and will be used to protect data center operations. Both systems were sold in conjunction with Active Power’s strategic partner, Caterpillar®. Based on Active Power’s CleanSource battery-free flywheel technology, the new 1000/1200 kVA UPS utilizes a superior design that incorporates robust digital components throughout, making it one of the most reliable UPS systems on the market. These systems extend Active Power’s track record as the supplier of the highest efficiency and most trouble-free UPS systems, protecting the higher power levels required by large data center and industrial applications. This product line will also provide paralleling capability up to 3.6 MVA. "The quote activity and general interest in our new 1000 and 1200 kVA systems has been very strong," offered Sriram Sivaram, VP of Sales and Marketing for Active Power. "Given the typical 6 to 18 month sales cycle for these higher power systems, we are excited about our early success with this new product." With over 300 installations worldwide and more than 6 million hours of field operation, Active Power’s products are a proven alternative to problematic battery-based systems. Active Power has the broadest range of battery-free power quality solutions: the CleanSource DC product line, which is compatible with all leading UPS brands and is available in the 100 – 2000kW range, and the CleanSource UPS product family, available from 65 kVA to 3600 kVA. Recently recognized by Frost & Sullivan for its ability to satisfy customer needs with new and innovative products, Active Power continues to rapidly expand its product line to address the needs of new market segments and geographies. For more information visit www.activepower.com, e-mail [email protected] or call 512-836-6464. About Active Power: Active Power, Inc. (www.activepower.com) designs, manufactures and markets battery-free power quality products that provide the consistent, reliable electric power required by today's digital economy. An ISO 9001-registered company, Active Power is the first to commercialize a flywheel energy storage system, CleanSource® that provides a highly reliable, low cost and non-toxic replacement for lead-acid batteries used in conventional power quality installations.