UPS Systems

CleanSource® 750HD

Active Power’s CleanSource 750HD delivers unmatched power density, reliability, and TCO. It builds on our field-proven flywheel CleanSource UPS, scaled up to make it the perfect fit for today’s data centers. CleanSource 750HD also introduces a new level of reliability and design flexibility with the Extended Runtime option, supporting up to 15 minutes of runtime.



Resource Library

Interact. Learn. Download. Watch.

System Options

The right fit for the right job.

480V Systems400V Systems

System Operation

The perfect sine wave.

Flywheel 101

Flywheel 101

The key to CleanSource 750HD’s unmatched value is Active Power's patented integrated flywheel UPS technology.

Flywheel systems store kinetic energy - energy produced by motion - by constantly spinning a compact rotor in a low-friction environment. When short-term backup power is required because utility power is lost, the inertia allows the rotor to continue spinning and the kinetic energy is converted to electricity. CleanSource 750HD provides up to a minute of UPS runtime, depending on the load and level of UPS redundancy, providing more than enough time for backup diesel generators to start and support the load.

  • 12.5" high; 25.5" in diameter; 1700 lbs
  • Constantly spins at ~ 7,700 rpm
  • Rough vacuum to reduce losses
  • Stores 10.5 MJ of energy
  • 20 year life

Online Architecture

System Operation CleanSource 750HD uses a flywheel-based power module as its basic building block . Each module is rated at 750 kVA / 675 kW. The flywheel machine is integrated into Active Power’s Parallel Online Architecture to provide an energy efficient, reliable, and high performing UPS system.
CleanSource 750HD systems can be paralleled for redundancy or capacity, supporting up to 3 MW of backup power in a single paralleled system.

Power Quality

Power Quality

CleanSource 750HD provides clean, reliable power to your data center, protecting critical operations against all nine IEEE power disturbances. CleanSource 750HD senses input power deviation from nominal, eliminates transients and corrects the output to the prevailing nominal. Upon a complete loss of input power or a major deviation in input voltage or frequency, the UPS will disconnect from the utility source and the flywheel stored energy will be used to support the load until the backup diesel generator comes online. Further, CleanSource 750HD provides fully online power protection that combines high efficiency without sacrificing performance. 

Innovative Design

Power QualityCleanSource 750HD was designed from the start to be the most innovative, efficient, and compact UPS in its class. CleanSource 750HD supports 675 kW of backup power in just two cabinets consuming 35 square feet of floor space – less than half its leading competitors. 

The primary source of the compact design is the flywheel energy storage system.  It packs 10.5 MJ of energy into a 3’ x 3’ x 3’ package rather than 4 or more bulky and expensive battery cabinets.

CleanSource 750HD has also been designed with ease of installation, operation, and service in mind:

Extended Runtime

Power Quality

For applications requiring additional UPS autonomy, CleanSource 750HD supports an Extended Runtime option. Standard valve-regulated lead acid (VRLA) batteries supporting up to 15 minutes of additional energy storage supplement the flywheel to provide additional flexibility and reliability to your design.

If a power disturbance occurs with Extended Runtime in place, CleanSource 750HD first draws on flywheel energy to support the load and switches to battery power for longer outages. Extended Runtime provides extended runtime in the event of a complete utility failure, and enhances overall battery reliability by eliminating short duration battery discharges, a primary factor in battery degradation. Further, the flywheel and batteries are independent energy storage systems, with either being capable of supporting the load in case of a disturbance. This dual energy storage approach creates the most reliable UPS system available.

Display & Monitoring

CleanSource Display The CleanSource 750HD system features a state-of-the-art operator interface to provide users with maximum visibility to system status, performance, events and maintenance requirements. The brilliant 10" LCD display and intuitive touch-screen control make it easy to view any level of detail in one of 10 languages.

In addition, Active Power's CleanSource View (CSView™) monitoring and control software enables real-time system visibility from virtually anywhere. By utilizing common data and connectivity with our CSView monitoring and control software and data integration options to your Building Management System (BMS), CleanSource 750HD provides you the degree of system visibility and service that you need to manage your critical power infrastructure.

Key Benefits

An UNMATCHED Combination.

Power Density

CleanSource Display

CleanSource 750HD supports nearly 20 kW per square foot vs. under 9 kW per square foot for battery-based UPS, more than double the power density of traditional solutions. All told CleanSource 750HD consumes just 35 square feet of floor space – less than half its leading competitors.
The primary source of the space savings is the absence of expensive and bulky battery cabinets that can double the amount of space your UPS system takes up. Further, CleanSource 750HD’s environmental tolerance is tremendously robust compared to batteries, tolerating ambient temperatures up to 40C and reducing the cooling requirements of your electrical system.


Power Quality

The integrated flywheel energy storage at the core of CleanSource 750HD makes it inherently reliable, delivering predictable, consistent backup power. The normal state of CleanSource 750HD is with the flywheel spinning constantly, storing kinetic energy. When called upon during a utility outage, the flywheel is ready to assume the load. By contrast, battery failures are the leading cause of UPS load loss and system downtime.

The Extended Runtime option further increases the reliability and availability of your UPS. By adding a second energy storage source, Extended Runtime makes CleanSource 750HD the most reliable UPS system available.

Power Quality

Total Cost of Ownership

CleanSource 750HD combines a competitive first cost with lower ongoing operating expenses – up to 30% lower than traditional UPS over 5 years. The result is a dramatic TCO benefit for your data center, with net savings to you on day 1 of operation.   

  • Superior energy efficiency – over 96% efficient at 40% load
  • Reduced cooling needs – no need for dedicated cooling for batteries
  • Lower maintenance requirements – routine annual check-up and bearing change every 3rd year
  • No battery changes – integrated flywheel with 20 year life

Service & Maintenance

When Downtime isn't an Option.

Maintenance Services

CleanSource Display

Regular maintenance and service prevents potential small problems from becoming issues that cause costly downtime. Active Power has designed the CleanSource 750HD with ease of maintenance in mind to ensure your critical power infrastructure operates with the utmost reliability. Unlike battery-based systems, which require monthly or quarterly inspections to ensure reliability, CleanSource 750HD requires only simple and non-invasive annual maintenance and a bearing change every third year. This streamlined maintenance schedule both restores your UPS to factory-like condition and reduces downtime during its operating life, improving the availability of your data center.

Warranty & Service Plans

PowerService Maintenance Programs

Active Power’s limited warranty guarantees no-cost repair labor and parts for 12 months after system installation. Additional extended warranty options are available.

Active Power offers flexible service plans designed to meet individual customer needs over the life of the system. Select the plan tailored to best meet your needs and be assured that everything will be taken care of by a qualified, certified Active Power technical support engineer.

In addition, PowerService plans provide a number of benefits beyond quality technical support, including:

  • Lower, predictable costs
  • Flexible payment options
  • Priority scheduling and response

Power Quality

Professional Services

Rely on our trained professionals for expert assessment, implementation, maintenance and support during every phase of your critical infrastructure system deployment and operation.  Whether you are looking at a standalone UPS system or a complete turnkey infrastructure solution, we can assist from start to finish.

Top of Page
CleanSource HD
Service Hotline :1.512.744.9290     Corporate HQ: 1.512.836.6464
Corporate HQ: Active Power, Inc
  • 2128 W Braker Ln BK12
  • Austin | Texas | United States | 78758
  • Tel: 1.512.836.6464
  • Fax: 512.836.4511
UK | Active Power Solutions Ltd.
  • Unit 7, Lauriston Business Park
  • Pitchill
  • Evesham | Worcestershire | WR118SN | United Kingdom
  • Tel: 44.1386.870.006
Germany | Active Power (Germany) GmbH
  • An der Leege 22
  • 37520 Osterode am Harz
  • Osterode  |  Germany
  • Tel: 49.0. 5522.507700
China | Active Power (Beijing) Co. Ltd.
  • Rm 510, Tower A, COFCO Plaza
  • 8 Jianguomen Nei Ave
  • Beijing  |  China  | 100005
  • Tel: 86.10.6528.3700
  • Login
  • Contact