The Power Experts


CLEANSOURCE HD UPSActive Power’s CLEANSOURCE HD UPS with flywheel technology delivers savings of 40% TCO over traditional UPS and are 12 times less likely to fail. The CLEANSOURCE HD is a green option, reducing your impact on the environment by 90%. Active Power’s flywheel UPS is a perfect fit for today’s mission critical applications in data centers, health care facilities, and industrial and manufacturing sites.

The HD model, 675 kW(60Hz), stores 10.2 MJ of energy in two cabinets consuming just 35 square feet of floor space. It offers up to 1 minute of runtime (load dependent). With a wide ambient temperature range of 32 to 104°F, this high density design is up to 98% efficient and is designed for easy installation, operation, and service. These models are made in the USA.


  • Small footprint – Half the space of legacy battery-based UPS
  • Cost-effective installation
  • Less heat rejection
  • Low cooling requirements
  • Low  maintenance and service
  • Generator compatibility
  • Wide ambient temperature range of 32 to 104°F – ideal for rugged applications
  • 20 year design life

Flywheel Technology

  • Over 96% efficient at 40% load
  • No need for dedicated cooling for batteries
  • Routine annual check-up and bearing change every third year
  • Integrated flywheel with 20-year life


Maximum kVA 750
Maximum kW 675
Voltage 480 VAC 3-phase, 3-wire plus ground
Voltage Range +10%/-15% (programmable)
Frequency 60Hz
Power Factor 0.99 at rated load and nominal voltage
Voltage 480 VAC 3-phase, 3-wire plus ground
Voltage Regulation Steady State: +/-1% for +/-10% input
Flywheel Mode: +/-1% steady state
Transient: +/-1% within 50mSec for 100% load step
Frequency 60Hz
Current – Nominal 480VAC 903A
Energy Storage
Type Integrated Steel Flywheel spinning at 7,700RPM
Flywheel Run Time 100%: 15s
50%: 29s
25%: 56s
Flywheel Recharge Time ˂2 min nominal at 175kW
Internal Static Bypass Included
Operating Temperature 32 to 104°F
Height 80 in.
Width 132 in.
Depth 39 in.
Weight 10,971 lbs.
Cable Entry Top or Bottom

For more in-depth specifications, see the data sheet.

For more information about Active Power Flywheel UPS systems,
call 800-876-9373 or email