Active Power successfully demonstrates High Inertia Turbine prototype

AUSTIN, Texas, April 6, 2001 — Active Power Inc., of Austin, a developer and manufacturer of battery-free power quality solutions, today announced it has successfully operated a prototype of its continuous power system (CPS), which uses a unique High Inertia Turbine™.

In repeated tests, the CPS system consistently performed to its design specifications.

“By successfully demonstrating a prototype of our CPS product, we have passed the most critical phase of the development program,” said Joe Pinkerton, CEO of Active Power (www.activepower.com). “This represents a significant milestone that will result in the extension of Active Power’s product line into several new high growth markets.”

Weighing less than 20 pounds, the High Inertia Turbine™ rotor in the CPS is a fully integrated flywheel/motor-generator/turbine and is capable of delivering 6 kilowatts (kW) of high quality power for a minimum of eight hours. This design enables a quiet, compact and cost effective (less than $300/kWh) system that can be used in a variety of power quality and distributed generation markets.

Target applications for this product include backup power for wireless base stations, small data centers and broadband communications, as well as distributed generation for small business and residential customers. First customer delivery is scheduled for the fourth quarter of 2001.

About Active Power

Active Power (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. Active Power is the first company to commercialize a flywheel energy storage system, CleanSource(r), which provides a highly reliable, low-cost and non-toxic replacement for lead-acid batteries used in conventional power quality installations. Through a strategic alliance, Active Power and Caterpillar Inc., teamed to develop a battery-free uninterruptible power supply (UPS), which is marketed under the Caterpillar brand name.