M90U-140 Modular UPS – Enterprise Three-Phase UPS (15–140kW, 208/120V)
15–140 kW | 208/120V Three-Phase | Modular Online Double-Conversion UPSS
Enterprise modular UPS platform designed for high-capacity facility power protection, scalable redundancy, and flexible runtime architecture in data center environments.
15–140 kW · 208/120V Three-Phase · Modular Online UPS · Enterprise Scale · Unity PF · N+1
M90U-140 enterprise modular three-phase UPS
The M90U-140 is an enterprise-scale modular online double-conversion UPS for data center, healthcare, and large infrastructure environments. Built for centralized deployments where capacity, redundancy, and long-term scalability must be achieved within a single modular, serviceable platform — power modules are added as infrastructure grows, and N+1 redundancy is configured without parallel UPS systems. It scales from 15 to 140 kW at unity power factor with up to eight hot-swappable 15 kW or 20 kW power modules.
Scalable, modular power for mission-critical availability
The M90U-140 protects critical data and equipment while supplying clean, network-grade power. It can be configured with fully redundant power and battery modules; should one module fail, the remaining modules smoothly take over the load. Power modules are independent and hot-swappable without risk to the critical load — so capacity and redundancy both scale over time within a single frame.
Enterprise modular UPS architecture
The M90U-140 enables large-scale capacity within a single modular system. Redundancy is implemented in an N+1 configuration without requiring parallel UPS systems, and the platform supports long-term expansion while maintaining centralized continuity, modular serviceability, and simplified lifecycle planning. Compared with monolithic multi-cabinet systems at this scale, the modular approach lets both capacity and redundancy scale over time while improving serviceability and reducing system-replacement requirements.
What the M90U-140 delivers
kW equals kVA, so every kVA of the rating is usable real power for high-density loads — no derate for low-PF equipment.
Add 15 kW or 20 kW power modules as capacity and runtime needs grow, without replacing the frame or interrupting the load.
Configure full redundancy within one system — up to 140 kW with N+1 (20 kW modules). If a module fails, the remaining modules carry the load with no transfer off the protected bus.
A segmented static bypass simplifies maintenance and improves fault isolation across the power path.
A front-mounted MBP switch transfers critical loads to utility for service or replacement without dropping the load.
A large graphic front panel surfaces status, metering, and alarms at a glance.
M90U-140 models and capacities
The frame holds up to eight power modules. The 20 kW module line is shown below; a 15 kW module line is also available. Unity power factor means the kVA and kW ratings are equal.
| Model | Capacity | Power modules | Charge current |
|---|---|---|---|
| M90U140-20k | 20 kVA / 20 kW | 1 × 20 kW | 8 A |
| M90U140-40k | 40 kVA / 40 kW | 2 × 20 kW | 16 A |
| M90U140-60k | 60 kVA / 60 kW | 3 × 20 kW | 24 A |
| M90U140-80k | 80 kVA / 80 kW | 4 × 20 kW | 32 A |
| M90U140-100k | 100 kVA / 100 kW | 5 × 20 kW | 40 A |
| M90U140-120k | 120 kVA / 120 kW | 6 × 20 kW | 48 A |
| M90U140-140k | 140 kVA / 140 kW | 7 × 20 kW | 56 A |
| M90U140-140k (N+1) | 140 kVA / 140 kW | 8 × 20 kW | 64 A |
The frame accepts up to eight power modules, all running in parallel and sharing the load. With 20 kW modules, seven modules reach the 140 kW system rating exactly; an eighth adds 20 kW of installed headroom, so the system still carries its full 140 kW if any one module fails. With 15 kW modules the equivalent figures are seven modules for 105 kW, with an eighth for N+1. Maximum system capacity is 140 kW — the eighth module adds redundancy, not rated capacity. Charge current scales with the populated module count (8–64 A).
Modular battery strings built for serviceability
Runtime is delivered by the matching M90-BC modular battery enclosure — a design many customers choose specifically for its serviceability and compact footprint. Battery is organized as up to eight independent strings, each with its own 100 A breaker, so an individual string can be isolated for service or replacement without taking down the others. Each string is built from four hot-swappable battery modules (up to 32 modules total), and the whole system fits a notably small footprint — an industry-leading footprint that saves up to 40% of floorspace versus comparable platforms, counting batteries and maintenance bypass.
Each of the up to eight battery strings has its own 100 A breaker, so a single string can be isolated for service or replacement while the rest keep protecting the load.
Battery scales as up to eight strings, each built from four battery modules — up to 32 modules — matched to the runtime the application needs.
Battery modules are hot-swappable, reducing service time and expense and keeping maintenance from interrupting the protected load.
An industry-leading footprint — including batteries and maintenance bypass — saves up to 40% of floorspace versus comparable enterprise modular platforms.
Battery runtimes
Runtime scales with the number of installed battery modules. Typical runtimes (minutes) for the M90-BC enclosure across system load:
| Battery modules | System load (kVA = kW) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 | 110 | 120 | 130 | 140 | |
| 4 modules | 15 | 5 | — | — | — | — | — | — | — | — | — | — | — | — |
| 8 modules | 36 | 15 | 9 | 5 | — | — | — | — | — | — | — | — | — | — |
| 12 modules | 61 | 25 | 15 | 10 | 7 | 5 | — | — | — | — | — | — | — | — |
| 16 modules | 88 | 36 | 22 | 15 | 12 | 9 | 7 | 5 | — | — | — | — | — | — |
| 20 modules | 115 | 48 | 29 | 20 | 15 | 12 | 10 | 8 | 6 | 5 | — | — | — | — |
| 24 modules | 140 | 61 | 36 | 25 | 19 | 15 | 13 | 10 | 9 | 7 | 6.1 | 5 | — | — |
| 28 modules | 168 | 74 | 44 | 31 | 23 | 18 | 15 | 13 | 11 | 9 | 8 | 6.9 | 5.9 | 5 |
| 32 modules | 196 | 88 | 52 | 36 | 27 | 22 | 18 | 15 | 13 | 12 | 10 | 8.7 | 7.6 | 6.7 |
System load shown across the top, in kVA which equals kW at unity power factor; runtimes are typical (minutes) and vary with battery condition, age, cycles, and ambient temperature. 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 enterprise member of the M90U family
M90U-140 is the enterprise-scale platform within the M90U family — for centralized deployments needing capacity and redundancy beyond the high-density M90U-80. The entry M90U covers 15–60 kW, the M90U-80 covers 15–80 kW in a single integrated cabinet, and the M90LU offers an external-battery extended-runtime sibling. For lithium, the Li90 is an integrated lithium facility UPS.
Current page
See the external-battery M90LU and the full M90U platform family.
Replace an APC Symmetra PX, Eaton 93PM or Vertiv Liebert EXM
The M90U-140 is commonly deployed to replace large legacy and aging modular platforms — including the APC Symmetra PX, Eaton 93PM, and Vertiv Liebert EXM — in data center modernization and capacity expansion, replacement of aging centralized UPS, infrastructure needing scalable redundancy and runtime flexibility, and consolidation of multiple UPS into one modular platform.
Where the M90U-140 is deployed
M90U-140 is deployed across enterprise-scale environments — data centers and large electrical rooms, healthcare and campus facilities, telecommunications core infrastructure, and industrial and process systems.
Approvals and warranty
The M90U-140 carries UL-1778, cUL, FCC Class A, RoHS, and is TAA compliant. It is backed by a 2-year electronics and 2-year battery warranty (USA and Canada).
M90U-140 specifications
| Capacity | 15–140 kVA = kW (unity PF), from 15 kW or 20 kW modules |
| Topology | Online double-conversion, modular |
| Power modules | Up to eight hot-swap modules (up to seven active + one N+1 redundant); 140 kW or 140 kW N+1 with 20 kW modules; 105 kW or 105 kW N+1 with 15 kW modules — maximum system capacity 140 kW |
| Output power factor | Unity (1.0) |
| Input | 208/120V, 50/60 Hz auto-sensing; range 121–253 VAC (L-L), 40–70 Hz; dual or single input |
| Output | 208/120V; 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) |
| Static switch | Modular static switch |
| Bypass | Integrated front-mounted maintenance bypass (external maintenance bypass optional) |
| UPS cabinet | 23.6"W × 43.3"D × 79.1"H / 657 lb; power module 19.3"W × 29.0"D × 5.2"H (490 × 736.5 × 133 mm) / 74 lb (20 kVA), 72 lb (15 kVA) |
| Battery enclosure (M90-BC) | 23.6"W × 43.3"D × 79.1"H / 860 lb + 85 lb per module; hot-swap modules, 4 per string, up to 8 strings (32 modules), individual 100 A breaker per string |
| Display | 10-in graphic touchscreen LCD |
| Communications | RS-232, EPO, intelligent slot (Web/SNMP, Modbus), optional relay card; ViewPower software included |
| Environment | 0–40°C (32–104°F); altitude 5,200 ft; audible noise <69 dBA at 1 m |
| Options | External maintenance bypass, 480V input transformer |
| Approvals | UL-1778, cUL, FCC A, RoHS, TAA compliant |
| Warranty | 2-year electronics, 2-year battery (USA and Canada) |
M90U-140 — frequently asked questions
Does N+1 redundancy cost capacity on the M90U-140?
No, and that is the main difference from the smaller frames. All eight power modules run in parallel and share the load; none is held idle. Eight 20 kW modules give 160 kW of installed capacity against a 140 kW system rating, so a full module’s worth of headroom is built in. If one module fails, the remaining seven still carry the full 140 kW. On the M90U and M90U-80, redundancy is bought by giving up capacity; here it is built into the rating.
Should I specify 15 kW or 20 kW power modules?
The rating sets the ceiling. Eight 20 kW modules reach 140 kW N+1; eight 15 kW modules reach 105 kW N+1. The two ratings cannot be mixed in one frame, so moving between them means replacing the whole set rather than adding to it. The modules are the same parts used in the M90U and M90U-80, so anything already purchased for those systems carries forward.
How does unity power factor change the comparison with other UPS?
It changes the usable watts. The M90U-140 is rated at unity, so kVA and kW are the same number and a 140 kVA system delivers 140 kW. A competing 140 kVA system rated at 0.9 power factor delivers 126 kW to the same load. Size on watts rather than kVA, or two systems will look equivalent on paper when they are not.
How is the battery configured?
In a separate matched enclosure rather than inside the UPS cabinet. It holds up to eight battery strings of four hot-swappable modules each, thirty-two modules in total, and every string has its own breaker so a string can be isolated for service without taking the others offline. Charge current scales with system size, from 8 A with one module to 64 A with eight.
When is the M90U-140 the right choice over the M90U-80?
When the load passes 80 kW, when N+1 is required at full rated capacity, or when runtime needs more battery than one cabinet holds. The M90U-80 puts power, batteries and bypass in a single cabinet up to 80 kW. The M90U-140 separates the battery into its own enclosure, which costs floor space but removes the runtime ceiling and allows string-level service.
What should I plan for on installation?
Two cabinets, each 23.6"W × 43.3"D × 79.1"H. The UPS enclosure is 657 lb before modules and adds 74 lb per power module; the battery enclosure is 860 lb before modules and adds 85 lb per battery module. Cable entry is top feed for both input and output, and an unloading ramp ships in the box. Confirm floor loading and door clearances early, since a fully populated pair is substantial.
Documents and related links
Plan your M90U-140 deployment
Talk to an Xtreme Power specialist about enterprise modular UPS sizing, phased capacity expansion, N+1 redundancy to 140 kW, external battery runtime, dual-input integration, and APC / Eaton / Vertiv replacement for centralized facility power.
