High Density UPS

675kW – 480V @ 60Hz

625kW – 380/400/415V @ 50Hz

Up to 98% Efficiency for optimal energy use.

Modular and Saleable paralleled up to 5400kW

Half the Size of legacy battery-based UPS systems.

Reliability Unmatched for critical operations.

Wide Operating Range up to 40°C.

20+ Years, No Battery Changes hassle-free operation.

OSHPD Pre-Approved

Active Power’s CLEANSOURCE® HD UPS Delivers the Most Power Dense UPS, Ever.

Active Power’s CLEANSOURCE® HD UPS represents a breakthrough in power density, offering unparalleled performance for critical applications. Engineered with efficiency, reliability, and sustainability in mind, it redefines the standard for mission-critical power solutions.

This innovative High Density Flywheel UPS combines advanced technology with a focus on total cost of ownership. By utilizing highly predictable, battery-free energy storage, the CLEANSOURCE® HD delivers unmatched reliability while significantly reducing costs over its lifespan.

Featuring a compact design, the integrated flywheel energy storage occupies less than half the space of traditional battery-based systems. With efficiency levels reaching up to 98%, it can lower total ownership costs by up to 40% compared to conventional solutions. Built on a fault-tolerant IGBT architecture, it ensures robust protection for all critical loads.

The system’s stored energy provides seamless ride-through of up to 2 minutes, offering a compelling alternative to static UPS systems reliant on bulky battery storage. Moreover, the CLEANSOURCE® HD UPS is equipped to handle diesel starting and synchronization requirements, even in parallel with generating sets.

By eliminating the need for batteries, this UPS saves space, reduces weight, simplifies site testing and maintenance, and eliminates the hassle of routine replacements. With the CLEANSOURCE® HD, organizations can enjoy peace of mind knowing they have a resilient and cost-effective power solution for their critical operations.


Extended Ride-through Capability – Up to 2 minutes of continuous power supply.

Space-Efficient Design – Occupies only 50% of the space compared to traditional battery-based UPS systems.

Redundant Cooling and Control – Equipped with redundant fans and control power units for added reliability.

Reduced Maintenance – Lower maintenance and service requirements for cost-effective operation.

Intuitive Color LCD Touchscreen Display – User-friendly interface for easy monitoring and control.

Built-in Power Factor Correction – Ensures efficient power delivery.

Dual Input and Integrated Maintenance Bypass – Ensures uninterrupted power and simplified maintenance.

Extended Design Life – Designed for a 20-year lifecycle, no disruptive battery replacements.

High Efficiency – Achieves up to 98% efficiency, minimizing energy waste.

Energy-Efficient Cooling – Lower cooling demands for cost savings.

Cost-Effective Installation – Affordably installed to meet your power requirements.

Remote Monitoring Capability – Allows remote monitoring and management for added convenience.

Generator Compatibility – Seamlessly integrates with backup generators.

OSHPD Compliant – Meets stringent seismic requirements for Healthcare.

Scalable Building Blocks – 675kW building blocks which can be paralleled up to 5400kW.

Power Management & CS View

Data Integration into your Building Management Software:

Monitor your AP UPS with your current BMS software package via MODBUS TCP or SNMP.

Active Power CSView Monitoring & Control Software Included.

  • Real time telemetry and continuous monitoring of your critical power system.
  • Over 200 telemetry points.
  • Ethernet Connections available.

Flywheel Technology

Stores 6.2 MJ of energy; up to 2 minutes of runtime (load dependent); wide ambient temperature range 0ºC to 40ºC and high density, high efficiency design.

  • SUPERIOR ENERGY EFFICIENCY – Over 96% efficient at 40% load and up to 98% efficient at 100% load.
  • REDUCED COOLING NEEDS – No need for dedicated cooling for batteries.
  • LOWER MAINTENANCE REQUIREMENTS – Routine annual check-up and bearing change every third year.
  • NO BATTERY CHANGES – Integrated flywheel with 20-year life.

Innovative Design

CLEANSOURCE® HD was designed from the start to be the most innovative, efficient, and compact UPS in its class. CLEANSOURCE® HD supports 625kW (50Hz) or 675 kW (60Hz) 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 10.2 MJ of energy into a 3’ x 3’ x 3’ package rather than four or more bulky and expensive battery cabinets. CleanSource HD has also been designed with ease of installation, operation, and service in mind.


  • CLEANSOURCE® HD675 UPS UL - 60Hz | 675 kW | 480V

  • CLEANSOURCE® HD625 UPS CE - 50Hz | 625 kW | 380/400/415V

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Market Sectors

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Military & Defense


Data Centers

Industrial & Manufacturing



Broadcasting & Communication


Active Power's flywheel technology plays a vital role in safeguarding pharmaceutical production facilities worldwide, ensuring uninterrupted power supply and preventing disruptions that could compromise the pharmaceutical manufacturing process.

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Military & Defense

Active Power's advanced flywheel technology plays a key role in supporting defense production and military facilities on a global scale. It guarantees an unbroken power supply, effectively shielding against any disruptions that might jeopardize national defense efforts.

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Active Power's Flywheel UPS systems ensure uninterrupted power to critical transport systems, safeguarding passenger safety, and minimizing service disruptions, all while reducing operational costs.

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Data Centers

Active Power's Flywheel UPS systems are deployed in data centers worldwide, offering unmatched reliability and energy efficiency to safeguard critical operations and reduce maintenance costs.

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Industrial & Manufacturing

Active Power UPS systems in Industrial & Manufacturing offer unmatched reliability, ensuring continuous production, and cost-effective energy efficiency, minimizing downtime and operational costs.

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Active Power's Flywheel UPS systems provide dependable power protection to maintain seamless operations and guest satisfaction while minimizing operational disruptions and costs in Casinos, Theme Parks and Shopping Malls around the world.

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Active Power is the preferred choice for healthcare facilities, offering dependable power solutions that ensure uninterrupted patient care, protect critical medical equipment, and align with sustainability goals, all backed by exceptional customer support.

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Broadcasting & Communication

Active Power's Flywheel UPS systems are an ideal choice for your broadcast facility, delivering unrivaled power reliability to ensure uninterrupted broadcasting and protect valuable equipment, all while reducing operational expenses.

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