ACPW Active Power, Inc.

Active Power, Inc. (Active Power) designs, manufactures and markets power quality products that provide electric power required by customers during electric utility disturbances. The Company has commercialized a flywheel energy storage system that provides a non-toxic replacement for the lead-acid batteries used in conventional power quality installations. Its first commercial product was a battery-free direct current (DC) system that is used as a bridging energy source in typical power quality installations and is compatible with other uninterruptible power supply (UPS) brands. The Company has also developed a battery-free UPS system that incorporates its flywheel technology. This system is marketed by Caterpillar Inc., a maker of engine generators for the power reliability market, under the Caterpillar brand name Cat UPS and by Active Power under the brand name CleanSource UPS.