Welcome to Active Power Inc.

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 here

At this time of global emergency, Active Power is fully operational and working hard to support all of its customers to keep their critical infrastructures operating. Our technology is ensuring the supply of vital power in hospitals and essential industries as they work to support patients and clients and tackle the COVID-19 crisis. 

To everyone working towards making the world safe, we say thank you.


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.

Data Centers

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.

Health Care

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


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


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

Modular Power - Powerhouse

Data center construction costs too much, takes too long, and incurs too much risk. Modular infrastructure backed by software intelligence is the key to solving these problems. PowerHouse is a factory-built and tested electrical system designed for low cost, rapid deployment, and superior management capability.

Service, Maintenance & Support

Active Power has designed its preventative maintenance and support programs to ensure your critical power infrastructure operates with the utmost reliability. Our technicians are available 24x7 to answer questions and react to, diagnose, and resolve system warnings and alarms.