X90-5S UPS Comparisons
The Xtreme Power X90-5S is a scalable, modular online double-conversion 480V three-phase UPS that protects critical data and equipment from 50 kW to 350 kW. This hub compares the X90-5S against the leading large-capacity 480V platforms from Eaton, Mitsubishi, and Vertiv — with hot-swappable power modules, unity power factor, and high-density installation as the recurring engineering themes.
Hot-swap modular vs. conventional large UPS
The X90-5S is the large-capacity platform in the X90 family — built from hot-swappable 50 kW and 70 kW power modules that scale from 50 kW to 350 kW within a single high-density cabinet. It is commonly evaluated against conventional 480V platforms where adding capacity or redundancy means powering the system down, adding a separate UPS and tie cabinet, or giving up floor space — and where in-cabinet, no-downtime scaling simplifies growth and service.
Compare by platform
Each comparison evaluates capacity and scaling, power-module serviceability, footprint, power density, and warranty in the large-capacity 480V class.
| Competitor platform | How it compares | Comparison |
|---|---|---|
| Eaton 93PM (400 kW frame) | Modular UPS; power modules require a system power-down to add or replace | Compare → |
| Mitsubishi 9900A AEGIS | Online UPS; non-hot-swap modules; head-to-head at 210 kVA vs 225 kVA | Compare → |
| Mitsubishi 9900B | Online UPS; non-hot-swap modules; larger, heavier cabinet (280 kW vs 300 kW) | Compare → |
| Vertiv Liebert EXL S1 | 250–400 kW; non-hot-swap modules; derates above 3,300 ft | Compare → |
Match the X90-5S to your deployment priorities
| If your priority is… | Recommended | Why | Go |
|---|---|---|---|
| Servicing or expanding without downtime | Xtreme Power X90-5S | Hot-swappable power modules — add or replace live, no transfer to utility | — |
| Replacing or comparing to Eaton 93PM | X90-5S vs Eaton 93PM | Roughly half the footprint and almost 2× the power density | Compare → |
| Replacing or comparing to Mitsubishi 9900A AEGIS | X90-5S vs 9900A AEGIS | Unity PF adds 7.5 kW usable at 210 kVA; in-cabinet scaling | Compare → |
| Replacing or comparing to Mitsubishi 9900B | X90-5S vs 9900B | Roughly half the weight; 36% smaller footprint | Compare → |
| Replacing or comparing to Vertiv Liebert EXL S1 | X90-5S vs Liebert EXL S1 | Pay-as-you-grow from 50 kW; full capacity to 5,200 ft | Compare → |
| Lowest entry capacity / pay-as-you-grow | Xtreme Power X90-5S | Scales from 50 kW in 50 kW or 70 kW power modules | — |
| High-altitude sites above 3,300 ft | Xtreme Power X90-5S | Full capacity up to 5,200 ft without derating | — |
| Capacities below 140 kW in a compact cabinet | Xtreme Power X90-2S | Integrated 50–140 kW platform, single cabinet | View → |
In-cabinet hot-swap vs. add-a-cabinet
The X90-5S combines hot-swappable power modules, static switch, and maintenance bypass in a single high-density cabinet, so capacity and redundancy grow by adding a 70 kW module — not a second UPS. Conventional platforms such as the Eaton 93PM, Mitsubishi 9900A AEGIS / 9900B, and Vertiv Liebert EXL S1 add footprint, weight, or a tie cabinet as capacity grows, and typically require a system power-down to service or expand power modules.
X90-5S modular design
- Hot-swappable 50/70 kW power modules — 50 to 350 kW
- Add capacity or N+1 redundancy live, with no power-down
- In-cabinet upgrade — no added footprint or tie cabinet
- Unity power factor (kVA = kW); up to 38 kW/sq ft
Engineering impact
- Module service and expansion without load transfer
- Smaller footprint and lower weight than conventional frames
- Fewer cabinets — no separate UPS or tie cabinet to scale
- Full capacity to 5,200 ft; 2-year on-site warranty with start-up
Where the X90-5S is commonly deployed
Smaller, larger, or in the rack?
For loads at or below 140 kW in the most compact footprint, the X90-2S applies the same integrated architecture in a smaller cabinet. For capacities beyond 350 kW, the X90-10S extends the platform.
Related architecture — Ai90 rack UPS
The Ai90 delivers 480V three-phase protection rack-mounted, with power conversion, batteries, bypass, and integrated output distribution in a single rack system — built for high-density compute and AI infrastructure.
Explore the Ai90 platform →The bottom line
The X90-5S brings hot-swappable, in-cabinet modular architecture to the 50–350 kW class — growing capacity and redundancy without a power-down, a second UPS, or added footprint, at unity power factor and high installed density. Select the platform comparison aligned with your incumbent to see the head-to-head detail.
Plan with confidence
Xtreme Power Conversion supports facility engineers, consultants, and integrators with UPS sizing, capacity scaling, runtime planning, and electrical-room modernization for 480V facility UPS systems.