Leaders in battery-free flywheel UPS systems

Active Power designs and manufactures battery-free flywheel uninterruptible power supply (UPS) systems and energy storage products for mission-critical power applications worldwide from its headquarters and manufacturing plant in Austin TX.

Active Power is a member of the Piller Power Systems group. Go to the Piller website click here

During the COVID-19 crisis, Active Power products are working hard to keep critical infrastructure operating. Our technology is protecting vital power in hospitals, data centres and other essential sectors to meet our many customers’ requirements whilst observing strict COVID-19 security measures.  To everyone working to make the world safe, thank you. 

To view our group chairman's COVID-19 message click here


300kW - 480V @ 60 Hz
300kW - 380V / 400V / 415V @ 50Hz


300kW - 2400kW 480V @ 60 Hz
380V / 400V / 415V @ 50Hz


625 kW - 380V / 400V / 415V @ 50Hz
675 kW - 480V @ 60Hz


Real estate construction costs too much, takes too long, and incurs too much risk. Active Power's new POWERHOUSE offers up to to 1.2MW (4 x 300kW) of modular, plug-and-play, battery-free UPS in a single 40' (12m) ISO container. It's your self-contained battery-free UPS plant room, wherever and whenever you need it. FAST!  Need more than 1.2MW? Simply call up another container to scale up.


Regular maintenance and service prevents potential small problems from becoming issues that could cause costly downtime. Active Power has designed our UPS products with ease of maintenance in mind to ensure your critical power infrastructure operates with the utmost reliability. Unlike battery systems, which sometimes require monthly or quarterly inspections to ensure reliability, CLEANSOURCE® UPS requires simple, non-invasive annual maintenance and a very simple periodic bearing change. This streamlined maintenance schedule both restores your UPS to factory-like condition and reduces downtime during its operating life, improving the availability of your mission critical operations.