Critical Power Solutions

Active Power, a division of Piller Power Systems Inc., is a leading producer of kinetic energy storage systems. Our flywheel technology provides permanent energy storage that helps solve customer problems and provides lower total cost of ownership, higher reliability, and more sustainable solutions. In 2016 Piller Power Systems Inc, the US subsidiary of Piller Group GmbH, acquired the business and assets of Active Power Inc., a US kinetic energy storage specialist. Piller Group GmbH is a division of the UK based engineering and industrial group, Langley Holdings plc Learn More.

Our Products

CleanSource XT225 UPS

225 kW - 1.8 MW

CleanSource MMS UPS

225 kW - 900 kW

CleanSource HD625 UPS

625 kW - 4.3 MW


Maintenance & Support


Modular Power

Modular IT

Custom Built Enclosures

Solving Customer Problems Across a Variety of Industries

Data Center Solutions

Health Care Solutions

Industrial Solutions