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

  • Incoming electric power disturbances can easily take a transmitter off the air, resulting in stranded viewers and potential loss in commercial revenue. Fortunately, an integrated flywheel based UPS system like that of the CleanSource® UPS system from Active Power is proven to protect transmitters and master control rooms from costly downtime and to guard transmitters from possible damage due to utility events.

  • Active Power’s CleanSource UPS and PowerHouse systems have been optimized for deployment in the most common data center designs. Our systems operate at up to 98% energy efficiency. Further, Active Power systems have been successfully deployed in more than 500 U.S. data centers, including numerous Uptime Institute certified Tier III installments.

  • Active Power CleanSource UPS systems are an ideal fit for the specific demands of health care applications where electrical interruption is not an option. They are proven to reduce system failure risk by 80% versus a legacy UPS with batteries, providing invaluable peace of mind. Frequent power quality incidents and micro-outages are no problem for the integrated flywheel UPS and ride through to generator capability easily complies with NFPA 110.

  • Flywheel UPS system provides significant benefits in harsh environments like that of industrial plants. The fact the system can be placed virtually anywhere and in close proximity of the equipment it is protecting is very appealing. Since there are no chemical batteries, the need for strict temperature control is no longer there. At 98 percent efficiency, there are significant efficiency benefits to be gained that over time will lower total cost of ownership compared to traditional battery-based systems.

  • Even a short power outage can close a casino for hours, costing millions of dollars of revenue and damaging reputation with customers. Active Power UPS systems and modular infrastructure solutions provide improved reliability over traditional solutions, replacing less reliable chemical batteries with predictable flywheel energy storage.

  • Continuous power is critical in keeping transportation infrastructure running smoothly. Active Power’s products provide compact, energy efficient, and reliable solutions for applications such airports and tunnel lighting.


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


300kW TO 2400kW - 380/400/415V 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 300 kW) 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.

Latest News

NOV 3, 2023

Active Power brings live Powerhouse demonstrations to Indianapolis

OCT 9, 2023

Backup for your backup when outages hit - GenSTART from Active Power

SEP 26, 2023

Join our Powerhouse Live Demo Event