9900CX Three Phase UPS

Hyperscale UPS

480V / 1050, 1400, 1500, 1750, and 2100 kVA

The 9900CX Series Uninterruptible Power Supply offers Mitsubishi Electric reliability at unprecedented load capabilities and in a fraction of the footprint.  It can handle the same load in 65% of the footprint, enabling 35% more space for revenue generation.

  • Available in these sizes: 1050, 1400, 1500, 1750, and 2100 kVA
  • Proprietary Insulated Gate Bipolar Transistors produce extremely flat high efficiency curves
  • The modular design allows for planned capacity growth
  • Eliminates mechanical wear of rotary systems

It's Time to Rethink your UPS

9900CX Video

The 9900CX is the largest 480V static UPS in the industry. The 9900CX uses 350 kVA power modules mated to intelligent bypass modules. The bypass modules are available in 1050 kVA, 1400 kVA, 1500 kVA, 1750 kVA, and 2100 kVA, and are paired with up to six power modules. Watch the accompanying video to learn more about the latest UPS from Mitsubishi Electric.





If downtime in your business equals disaster, Mitsubishi Electric delivers the highest reliability among backup power equipment suppliers through robust proprietary technology designed to deliver continuous power in the most demanding environments. Whereas competitors only estimate their reliability, Mitsubishi Electric’s installed base of 9900 series Uninterruptible Power Supplies have sustained load carrying capability more than 99.9993% of their actual operational history.

The 9900CX Series UPS also features N+1 redundancy constructed of modular power electronics in parallel. If one of these modules were to fail, the 9900CX internal controls would isolate the module while continuing to provide critical power protection.

Hight reliability


Expandability is a key feature of the 9900CX Series UPS. Its modular design enables supplemental modules to be added over time as warranted by increasing capacity needs, making hyperscale expansion faster, easier and more economical.

9900CX Modular Expandable Grow-as-you-go


Footprint Comparison

All the Power.  Two-thirds the Footprint.


The 9900CX Series UPS creates more white space. It can handle the same load in 65% of the footprint, meaning 35% more space can be allocated to revenue generating equipment. The 9900CX also has up to a 24% higher power density than any other UPS, maximizing power output while minimizing gray space.


  • UL 1778 (Underwriter Laboratories) Standard for UPS Equipment
  • CSA 22.2 (Canadian Standards Association - cUL Equipment)
  • IEC (International Electro-technical Commission), Semiconductor Converter Standards
  • EMI compatibility: IEC 62040-2 (category C3)

  • IEEE 587, ANSI C62.41 1991 Standard for Surge Withstand Ability
  • ISO 9001 Quality Assurance program
  • Energy Star Rated

Other Features

  • Superior power control (5th Generation IGBT 3 level topology)
  • True online double conversion
  • Built-in N+1 redundancy
  • Up to 97% AC/AC efficiency
  • Front LCD touch color display panel
  • Capacity can be increased over time using original bypass module
  • 1.1:1 generator compatibility
  • 65 and 100 kAIC options
  • Multiple cable entry points
  • Lithium Ready



As UPS systems are often viewed as one of the biggest culprits regarding energy loss in power distribution, it makes sense to consider efficiency, along with reliability, as a primary factor in the selection of a UPS. 

Through its history of technological developments, Mitsubishi Electric has proven to be a leader in advancing efficiencies to unprecedented levels.  Beginning with the use of IGBTs for converters and inverters and 3 level topology and followed by the promotion of transformerless designs, Mitsubishi Electric has long been at the forefront of offering Uninterruptible Power Supplies with the highest efficiencies available coupled with unparalleled reliability.  Mitsubishi Electric's superior expertise in optimizing power device control is evident by the flatness of the resulting curve, demonstrating high efficiency across all load levels.  Please note that all efficiency curves published on this site are for the respective UPS operating in true online double conversion (aka VFI).

DC backup power Solutions


While the UPS is the most critical piece of infrastructure in a data center, the DC power backup storage system that supports the UPS is not far behind. 

We offer various DC power solutions, and provide information on both lithium ion and VRLA battery cabinets in the Peripherals section below. 

For a deeper dive into all possible solutions, be sure to review our webpage entitled UPS Batteries and DC Power Storage Solutions or simply click here.



Bypass Contactors

Static Switch
Main Control Board
CPC/CPI AC Filter Capacitors
350 kva power module
350 kva power module
350 kva power module
350 kva power module
350 kva power module