M90U Three-Phase Modular UPS | 15-60 kW, 208Y/120V
15–60 kW | 208/120V Three-Phase | Modular Online Double-Conversion UPS
Modular three-phase UPS platform designed for centralized facility power protection, scalable capacity growth, and N+1 redundancy in commercial, healthcare, and industrial environments.
15–60 kW · 208/120V Three-Phase · Modular Online Double-Conversion UPS · Unity PF · N+1 Capable
M90U modular three-phase facility UPS
The M90U is a scalable modular three-phase online double-conversion UPS for centralized facility power protection — 15 to 60 kW at unity power factor, built from hot-swappable 15 kW or 20 kW power modules with internal modular VRLA batteries. Capacity and redundancy scale within a single enclosure, so infrastructure can grow without system replacement or initial oversizing. Designed for facilities transitioning from distributed rack-based UPS to centralized power architecture across healthcare, data center, industrial, and edge environments.
Scalable, redundant, centralized power
The M90U is a scalable modular online double-conversion UPS that protects critical data and equipment while supplying clean, network-grade power. It can be configured with a fully redundant power module and battery modules — if one module fails, the remaining modules smoothly take over the load. The power modules are independent and hot-swappable without risk to the critical load, and the platform defines a modular approach to facility infrastructure where capacity is built incrementally rather than oversized at initial deployment.
Build capacity incrementally
The M90U enclosure accepts up to three hot-swappable power modules and up to twelve internal battery modules. Capacity is added as load grows — from a 15–20 kW initial install, to 30–40 kW as infrastructure expands, to a fully populated 45–60 kW system — without replacing the UPS or oversizing on day one. Redundancy is configured within the same enclosure by reserving a module.
What the M90U delivers
Unity PF (kW = kVA) provides full real capacity for high-density loads — no derating of usable watts from the kVA rating.
Add 15 kW or 20 kW modules as power and runtime requirements change; modules hot-swap without risk to the critical load.
Configure a redundant power module (N+1 to 40 kW on 20 kW modules, 30 kW on 15 kW modules) and redundant battery modules for the highest availability.
Best-in-class double-conversion efficiency lowers energy consumption and heat output, reducing cooling and operating cost.
Dual- or single-input configurations provide maximum installation flexibility for centralized electrical-room deployment.
Manually transfer the critical load from UPS to utility power for service, with a 5.7-in graphic LCD for status and alarms.
Capacities and module configuration
M90U is offered in two module lines — 15 kW and 20 kW power modules — each scaling across three enclosure slots. Unity power factor means the kVA and kW ratings are equal.
| Model | Capacity | Power modules | Charge current | Redundancy |
|---|---|---|---|---|
| M90U-15 | 15 kVA / 15 kW | 1 × 15 kW | 8 A | Single module |
| M90U-30 | 30 kVA / 30 kW | 2 × 15 kW | 16 A | N+1 to 15 kW |
| M90U-45 | 45 kVA / 45 kW | 3 × 15 kW | 24 A | Fully populated — non-redundant |
| M90U-20 | 20 kVA / 20 kW | 1 × 20 kW | 8 A | Single module |
| M90U-40 | 40 kVA / 40 kW | 2 × 20 kW | 16 A | N+1 to 20 kW |
| M90U-60 | 60 kVA / 60 kW | 3 × 20 kW | 24 A | Fully populated — non-redundant |
The enclosure holds up to three power modules (up to 45 kW with 15 kW modules, up to 60 kW with 20 kW modules) and up to twelve internal battery modules. N+1 protected capacity is one module below the fully populated rating; the 45 kW and 60 kW ratings are fully populated and non-redundant. Charge current scales with the populated module count (8 / 16 / 24 A).
Runtime by battery modules and load
Approximate runtime in minutes by internal battery-module count (2 to 12) and system load. Higher module counts support higher loads and longer runtime; a dash indicates that load is beyond the supported range for that battery configuration.
| Battery modules | System load (kVA = kW) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | |
| 2 modules | 15 | 5.4 | — | — | — | — | — | — | — | — | — | — |
| 4 modules | 34 | 15 | 8.5 | 5.4 | — | — | — | — | — | — | — | — |
| 6 modules | 55 | 24 | 15 | 9.9 | 7.3 | 5.4 | — | — | — | — | — | — |
| 8 modules | 78 | 34 | 21 | 15 | 11 | 8.5 | 6.9 | 5.4 | — | — | — | — |
| 10 modules | 100 | 44 | 27 | 19 | 15 | 11 | 9.3 | 7.7 | 6.6 | 5.4 | 4.6 | 3.9 |
| 12 modules | 115 | 55 | 34 | 24 | 18 | 15 | 12 | 9.9 | 8.5 | 7.3 | 6.4 | 5.4 |
Runtimes are approximate and vary with battery age, temperature, and site conditions. Battery life is reduced above 30°C and capacity derates above 30°C and 5,200 ft. Contact Xtreme Power at (800) 582-4524 or sales@xpcc.com for runtime sizing.
The entry modular facility platform
M90U is the entry modular facility UPS within centralized infrastructure environments — deployed in electrical rooms where load aggregation exceeds the capability of rack-based UPS and a centralized, scalable architecture is required. The compact M90C-6S sits a step below it for smaller modular loads. The M90U uses internal batteries for compact deployment; the M90LU shares the platform with an external-battery architecture for extended runtime, and the M90U-80 / M90U-140 extend the family to higher capacities.
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Where the M90U is deployed
M90U is deployed across facilities requiring centralized, scalable power protection — healthcare infrastructure, data centers, industrial systems, telecommunications, and edge data center deployments.
Approvals and warranty
The M90U carries UL-1778, cUL, FCC Class A, RoHS, and is TAA compliant. The system is backed by a 2-year electronics and 2-year battery warranty (USA and Canada).
M90U specifications
| Capacity | 15 / 20 / 30 / 40 / 45 / 60 kVA = kW (unity PF), from 15 kW or 20 kW modules |
| Topology | Modular online double-conversion, three-phase |
| Input | 208Y/120V three-phase, 50/60 Hz auto-sensing; range 121–253 VAC (L-L), 40–70 Hz; dual or single input |
| Output | 208Y/120V three-phase, 50/60 Hz ±0.5 Hz; THD <2% at full load |
| Efficiency | Up to 94% online mode, up to 98% ECO mode |
| Overload | 105–110% (60 min); 110–125% (10 min); 126–150% (1 min); >150% (200 ms) |
| Redundancy | N+1 capable — protected ceiling 40 kW (20 kW modules) / 30 kW (15 kW modules); 45 kW and 60 kW fully populated, non-redundant |
| Battery | Internal modular VRLA; nominal ±120V; up to 12 battery modules; charge current 8 / 16 / 24 A by module count |
| Bypass | Integrated maintenance bypass (external maintenance bypass optional) |
| Dimensions | Enclosure 20.3"W × 39.4"D × 54"H / 484 lb; power module 19.3 × 29.0 × 5.2 in (490 × 736.5 × 133 mm) / 74 lb (20 kVA), 72 lb (15 kVA); battery module 4.1 × 28.3 × 6.0 in / 68 lb |
| Display | 5.7-in graphic LCD — status and alarms |
| Communications | RS-232, EPO, intelligent slot (Web/SNMP, Modbus), optional relay card |
| Environment | 0–40°C (32–104°F); altitude 5,200 ft; audible noise <65 dBA at 1 m |
| Mounting | Standard floor-mount brackets included; seismic hold-down anchorage available |
| Options | External maintenance bypass, 480V input transformer, battery temperature sensor, seismic hold-down |
| Approvals | UL-1778, cUL, FCC A, RoHS, TAA compliant |
| Warranty | 2-year electronics, 2-year battery (USA and Canada) |
M90U — frequently asked questions
Does the third module slot add capacity or redundancy?
Either one, not both. The enclosure holds three power modules. With 20 kW modules, three populated slots give 60 kW with no redundancy, or 40 kW with the third held as an N+1 spare. With 15 kW modules the same choice gives 45 kW non-redundant or 30 kW N+1. The protected ceiling is always one module below the fully populated rating, so decide which you need before sizing.
Should I specify 15 kW or 20 kW power modules?
The module rating sets the capacity ladder. The 20 kW line scales 20 / 40 / 60 kW; the 15 kW line scales 15 / 30 / 45 kW. The two ratings cannot be mixed in one frame, so moving from one line to the other means replacing the whole set of modules rather than adding to it. The enclosure, batteries and bypass carry over unchanged. Specify 20 kW modules where the site may pass 45 kW, to avoid buying modules twice.
How does unity power factor change the comparison with other UPS?
It changes the usable watts. The M90U is rated at unity, so kVA and kW are the same number and a 60 kVA system delivers 60 kW. A competing 60 kVA system rated at 0.9 power factor delivers 54 kW to the same load. Size on watts rather than kVA, or two systems will look equivalent on paper when they are not.
Do the internal batteries cover most runtimes?
For most applications, yes. Up to twelve VRLA battery modules mount inside the same enclosure, giving roughly 24 minutes at 20 kW and about 5 minutes at the full 60 kW. Runtimes assume fully formed batteries and vary with age, temperature and site conditions. Contact Xtreme Power for sizing where the required hold-up time is specific.
When should I step up to the M90U-80 instead?
When capacity or density is the constraint. The M90U-80 takes four power modules rather than three, reaching 80 kW against 60 kW here, and adds up to sixteen internal battery modules, a 10-in touchscreen, a front-mounted maintenance bypass and top-feed cable entry. The power modules are the same part in both frames, so modules already purchased carry forward. Choose the M90U where 60 kW is sufficient and the electrical room is not tight; choose the M90U-80 where space is limited or the load is heading past 60 kW.
What are the installation and cable entry options?
Cable entry is from the rear, side or bottom, which suits rooms where conduit runs under a raised floor or along a wall. Input is 208Y/120V three-phase at 50/60 Hz auto-sensing, over a range of 121–253 VAC line to line, in dual-input or single-input configuration. Standard floor-mount brackets are included, seismic hold-down anchorage is available, and an unloading ramp ships in the box.
Documents and related links
Plan your M90U deployment
Talk to an Xtreme Power specialist about modular UPS sizing, phased capacity expansion, N+1 redundancy planning, runtime architecture with internal battery modules, dual-input integration, and APC / Eaton replacement for centralized facility power.