Xtreme Power X90-5S vs Mitsubishi 9900A AEGIS
A 50–350 kW modular 480V UPS comparison — the hot-swappable, unity-power-factor X90-5S against the Mitsubishi 9900A AEGIS, drawn at the 210 kVA / 225 kVA operating point. The X90-5S is a scalable, modular online double-conversion UPS that protects critical data and equipment, available from 50 kW to 350 kW.
Integrated hot-swap modular vs. conventional modular
The Xtreme Power Conversion X90-5S is a scalable, modular online double-conversion 480V UPS that efficiently protects critical data and equipment from power problems, available in capacities from 50 kW to 350 kW.
The Mitsubishi 9900A AEGIS is an online double-conversion UPS deployed across data-center and facility environments. This comparison is drawn at the X90-5S 210 kVA frame against the Mitsubishi 9900A AEGIS 225 kVA frame.
Because the X90-5S is unity power factor rated (kVA = kW), its 210 kVA frame delivers a full 210 kW of usable power — 7.5 kW more than the 202.5 kW available from the 225 kVA 9900A AEGIS at 0.9 PF. The platforms also differ in power-module serviceability, in-cabinet scalability, and ECO-mode efficiency, as compared below.
How the two architectures differ
The Xtreme Power X90-5S is a scalable, modular online double-conversion 480V UPS built from hot-swappable 50 kW and 70 kW power modules, scaling from 50 kW to 350 kW within a single high-density cabinet. Power modules can be added or replaced while the system continues to protect the load.
Because power and battery modules are front-accessible and hot-swappable, capacity expansion and module service do not require transferring the load to unprotected utility power — an architectural difference that affects serviceability, uptime risk, and electrical-room planning.
Per the supplied comparison, the 9900A AEGIS power modules are not hot-swappable, and adding capacity or N+1 redundancy requires an additional UPS cabinet plus a tie cabinet. The X90-5S scales from 210 kW to 280 or 350 kW — or to N+1 redundancy — by adding 3U 70 kW power modules within the same cabinet, with no additional footprint.
X90-5S vs Mitsubishi 9900A AEGIS
| Feature | Xtreme Power X90-5S | Mitsubishi 9900A AEGIS | Advantage |
|---|---|---|---|
| Capacity (usable kW) | 210 kW (210 kVA, unity PF) | 202.5 kW (225 kVA at 0.9 PF) | The X90-5S is unity power factor rated (kVA = kW) and provides 7.5 kW of additional usable power. |
| Upgradeability / scalable | Yes — upgradeable to 280 kW or 350 kW | No | The X90-5S 210 kW capacity upgrades to 280 kW, 350 kW, or N+1 redundancy simply by adding 3U 70 kW power module(s) — no additional footprint required. Adding capacity or redundancy to the 9900A AEGIS requires an additional UPS cabinet and a tie cabinet. |
| Hot-swappable power modules | Yes — hot-swap power modules | No | X90-5S power modules can be added or replaced at any time without powering the system down. The 9900A AEGIS does not offer hot-swappable modules. |
| Efficiency | Up to 99% ECO mode or 96.5% online mode | Up to 96.8% online mode | Online efficiency is industry-leading on both platforms; the X90-5S additionally provides an ECO mode up to 99%. |
| Footprint | 31.5″W × 42″D × 79″H | 35.4″W × 32.8″D × 80.6″H | The two cabinets are comparable in footprint and height; the 9900A AEGIS floor area is marginally smaller, so footprint is not a differentiator in this comparison. |
| Warranty | 2 years on-site with factory start-up | 1 year on-site with factory start-up | Xtreme Power’s standard warranty covers 2 years versus 1 year for the 9900A AEGIS. |
Mitsubishi 9900A AEGIS figures are shown as supplied and are unverified; confirm against current manufacturer documentation. X90-5S figures per the X90-5S datasheet.
Where the X90-5S leads
- 7.5 kW more usable power. Unity power factor (kVA = kW) means the 210 kVA X90-5S delivers a full 210 kW, versus 202.5 kW from the 225 kVA 9900A AEGIS at 0.9 PF.
- Scales in-cabinet. Upgrade from 210 kW to 280 or 350 kW — or to N+1 redundancy — by adding 3U 70 kW power modules, with no additional footprint. The 9900A AEGIS requires an additional UPS cabinet and tie cabinet.
- No-downtime module service. Power modules are hot-swappable; the 9900A AEGIS does not offer hot-swappable modules.
- ECO efficiency up to 99%. Both platforms post industry-leading online efficiency; the X90-5S adds an ECO mode up to 99% (versus up to 96.8% online).
- Longer standard coverage. 2-year on-site parts & labor warranty with factory start-up, versus 1 year.
Specification summary
| Parameter | Xtreme Power X90-5S | Mitsubishi 9900A AEGIS |
|---|---|---|
| Compared rating | 210 kVA = 210 kW (unity PF) | 225 kVA = 202.5 kW (0.9 PF) |
| Topology | Online double conversion | Online double conversion |
| Input / output voltage | 480 V three-phase | 480 V three-phase |
| Output power factor | Unity (1.0 PF) | 0.9 PF (per supplied figures) |
| Efficiency | Up to 96.5% online / 99% ECO | Up to 96.8% online |
| Power-module service | Hot-swappable (no system power-down) | Not hot-swappable |
| Capacity upgrade | In-cabinet to 280 / 350 kW or N+1 (add 70 kW modules) | Additional UPS cabinet + tie cabinet required |
| Footprint | 31.5″W × 42″D × 79″H | 35.4″W × 32.8″D × 80.6″H |
| Warranty (standard) | 2 years on-site + factory start-up | 1 year on-site + factory start-up |
Detailed electrical specifications vary by configuration.
Where planners evaluate the X90-5S
Infrastructure planners frequently evaluate the X90-5S where:
- Sizing where unity power factor maximizes usable kW per installed kVA
- Phased capacity growth from 210 kW toward 280 or 350 kW, or N+1 redundancy, without added footprint
- Deployments that cannot transfer the load to utility power for module expansion or service
- Projects standardizing on a longer parts & labor warranty with factory start-up
Compare the X90-5S with other modular UPS platforms
Engineering planning support
Xtreme Power Conversion supports facility engineers, consultants, and system integrators with modular UPS architecture evaluation, electrical-room deployment planning, capacity scaling strategy, and infrastructure upgrade assessment.