Three-phase UPS
400V and 480V modular UPS
Modular three-phase UPS for 480V facilities and 400/230V international projects: hospitals, imaging suites, data centers and industrial sites. The X90 scales from 70 kW to 700 kW with hot-swap power modules; the Ai90 puts a 50-70 kW modular UPS and its batteries in one rack; the M90Ci serves 400/230V sites.
Compare models
| Model | Voltage | Power modules | Capacity |
|---|---|---|---|
| X90-1S | 480V | 50 or 70 kW | Up to 70 kW |
| X90-2S | 480V (3W + G or 4W + G) | 50 or 70 kW | Up to 140 kW |
| X90-5S | 480V | 50 or 70 kW | Up to 350 kW |
| X90-10S | 480V | 50 or 70 kW | Up to 700 kW |
| Ai90 | 480/277V, 480V or 400/230V | Modular | 50-70 kW |
| M90Ci-2S | 400/230V | Modular, 2-slot | 10 kW |
| M90Ci-6S | 400/230V | Modular, 6-slot | Up to 60 kW |
X90, 480V
Hot-swap 50 or 70 kW power modules, N+1 in the 2S, 5S and 10S, 65 kAIC, full front access.
Ai90 and M90Ci
A rack-integrated modular UPS for AI and edge racks, and modular systems for 400/230V projects.
How to choose
| If you need | Start with |
|---|---|
| 480V, up to 70 kW, with internal batteries | X90-1S |
| 480V up to 140 kW, or a 4-wire (4W + G) service | X90-2S |
| 480V, up to 350 kW | X90-5S |
| 480V, up to 700 kW | X90-10S |
| UPS and batteries in one rack, for AI or edge | Ai90 (ships early 2027) |
| 400/230V international projects | M90Ci |
Frequently asked questions
Why choose 480V?
At the same power, 480V carries less current than 208V, so conductors and breakers are smaller. Large facilities often bring 480V to the UPS and step down to 208/120V after it.
What battery options does the X90 have?
The X90-1S and 2S hold batteries internally. For longer runtime, add X90-BC battery cabinets or Vision REVO TP lithium (LFP) cabinets from 20.5 to 51.2 kWh.
What voltages does the Ai90 support?
480/277V (4W + G), 480V (3W + G) or 400/230V (4W + G), at 50 or 60 Hz.
Do I need rear access?
No. The X90 is designed for full front access, so it can stand against a wall.
Which models are TAA compliant?
The X90, Ai90 and M90Ci are TAA compliant. See the TAA-compliant three-phase UPS page for the full list.