A small footprint UPS that delivers reliability and ENERGY STAR-certified efficiency for edge data centers,
medical equipment, emergency lighting, & more.

480V / 80, 100, 150, 160, 225 kVA


The 9900AEGIS model is the lower range of kVA sizes in the popular 9900 Series of UPS from Mitsubishi Electric.

It is a three-phase, online double conversion UPS featuring Mitsubishi Electric’s world-renowned 3-level Topology Insulated Gate Bipolar Transistor (IGBT) technology for enhanced performance and reliability.

The 9900AEGIS is a transformerless UPS that has earned the ENERGY STAR rating for its high-efficiency (up to 97%) performance.

When uptime and performance are critical, its reliability and energy-efficiency make it the perfect fit, especially since this efficiency is maintained regardless of the load - crucial in data centers where loads can range anywhere from 25% to 80%.

Reliable UPS. Increased uptime.

If downtime in your business equals disaster, trust the highest reliability among backup power equipment suppliers with the 9900AEGIS. Through robust proprietary technology, our reliable UPS delivers continuous power in the most demanding environments.

While competitors only estimate their reliability, Mitsubishi Electric’s installed base of 9900 Series Uninterruptible Power Supplies have sustained load-carrying capability of 99.9995% of their actual operational history.

Small Footprint UPS. Maximum power with increased white space.

The small footprint of the 9900AEGIS UPS creates more white space by minimizing the gray space it occupies. It can handle the same load in a significantly smaller area, meaning more of your space can be allocated to revenue-generating equipment. The power density and output relative to size makes it the UPS of choice in medical facilities and edge data centers.

Minimal voltage distortion. Enhanced output voltage control.

How an IGBT power device is controlled is key to achieving optimum performance characteristics of a UPS. Mitsubishi Electric designs and manufactures the IGBT devices in our UPS, giving us intimate knowledge on how best to control them.

Utilizing a combination of high sampling rates and direct digital control (DDC), the 9900AEGIS delivers superior performance under all load conditions. Benefits to the customer include -

  • Excellent output voltage control
  • Dynamic inverter response
  • Minimal voltage distortion during full load steps without the DC source

These characteristics maximize the performance of the UPS and increase the overall reliability of components and the system.

Low maintenance. Consistent quality.

Designed with not only reliability, but also maintenance in mind, the various system components of the 9900AEGIS UPS minimize or help ease system maintenance. Low-effort accessible upkeep systems ensure consistent quality operation for the lifetime of the system. Below are just a features that make the 9900AEGIS easy to maintain:

  • High quality industrial grade fans to provide longer life and enhanced dependability
  • 15-year capacitor life for increased reliability and reduced maintenance costs
  • Front access for ease of maintenance and decreased downtime
  • Static switch with wrap around contactor for increased reliability and added redundancy

The Ideal UPS for Edge Data Center, Medical, & Emergency Lighting Applications

The 9900AEGIS is ideal for backing up the critical applications of data centers, emergency lighting systems, and medical equipment across various markets.

Application: Data Centers, Edge Data Centers

Markets: Cloud Computing & Colocation, Content Delivery & Media, Hospital & Healthcare

The high efficiency and minimal footprint of this UPS model is well-suited for delivering backup power to data centers supporting small enterprises, as well as regional edge (small colocations) or network edge data centers that are dependent on a continual source of reliable power to support their clients’ needs.

Application: Medical Equipment

Markets: Hospital & Healthcare

The 9900AEGIS can perform 100% step load without batteries, seamlessly supporting the significant amperage spike during MRI or CAT scan equipment start up. This system is also a power conditioner by smoothing out voltage fluctuations to deliver clean power to sensitive diagnostic equipment and ensure equipment stays up and running in an emergency.

Application: Emergency Lighting

Markets: All markets

The 80 and 100kVA sizes of the 9900AEGIS are UL 924 listed, making them the UPS models of choice for backing up emergency lighting systems and ensuring all occupants evacuate safely in the event of an outage.

Other Features

  • Advanced 3 level circuit topology and PWM
  • True online double conversion technology
  • Low input harmonics
  • Internal static bypass
  • Dual input
  • Available in parallel redundant and capacity (up to 4 modules)
  • Output power factory of 0.9
  • Up to 97% efficiency
  • 1.1:1 Generator sizing
  • UL 924 Certified (80 & 100kVA models)
  • Lithium ReadyTM


  • UL 1778 (Underwriter Laboratories) Standard for UPS Equipment
  • CSA 22.2 (Canadian Standards Association - cUL Equipment)
  • IEC (International Electro-technical Commission), Semiconductor Converter Standards
  • FCC Title 47, Part 15, Subpart B
  • IEEE 587, ANSI C62.41 1991 Standard for Surge Withstand Ability
  • ISO 9001 Quality Assurance program
  • OSHPD Rated
  • UL 924 Listed

Why Choose A Mitsubishi Electric UPS?

9900AEGIS UPS offers high efficiency.

One of the outstanding features of the 9900AEGIS is that it boasts a relatively flat efficiency curve, indicating that the UPS is highly efficient regardless of the load. This is significant since loads in various data centers can range anywhere from 25% to 80%. The 9900AEGIS can be configured both as a single module or in multi-module systems up to four units.

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 followed by 3-level topology and transformerless UPS designs, Mitsubishi Electric has long been at the forefront of offering uninterruptible power supplies with the highest efficiencies and 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.

All efficiency curves published on this website are for the respective UPS operating in true online double conversion (aka VFI).

Compatible battery power for a 80-225kVA UPS

To further support our energy efficient UPS, we offer various battery and DC power solutions. Information on lithium ion, VRLA, Pure Lead, and VLA battery cabinets can be found in the peripherals section below.

For a deeper dive into all possible solutions, review our UPS Batteries & DC Power Storage Solutions.

It houses 10 batteries with an impressive expected lifetime of 15 years. Its minimal footprint makes it an attractive alternative for small spaces and edge data centers. An optional top hat is available for handling localized data storage.
For a deeper dive into all possible solutions, review our UPS Batteries & DC Power Solutions.

9900AEGIS UPS Specifications

While the UPS is the most critical piece of infrastructure in a data center, Mitsubishi Electric can customize a complete and seamless backup solution to suit a customer’s specific needs.

Review the various UPS peripherals including maintenance bypasses, DC energy solutions, & communication options below.