Xtreme Power M90C Modular Three-Phase UPS Systems
Deliver reliable, scalable power protection with the M90C modular three-phase UPS. Built for critical IT, data center, and industrial environments, it ensures high-efficiency performance, easy expansion, and maximum uptime across 208/120V and 400/230V three-phase applications.
Designed with a unity power factor (kVA = kW) for maximum usable capacity, and featuring hot-swappable modules, flexible runtime options, and integrated maintenance bypass. Frequently used in small edge data rooms and distributed IT environments — see UPS for Edge Data Centers.
Why choose the Xtreme Power M90C?
kVA = kW — full system utilization, no wasted power.
Each slot accepts a power module or a battery module — a working system always needs at least one power module and one battery module.
Hot-swappable design enables fast, cost-effective maintenance and capacity upgrades.
Engineered for data centers, telecom, edge computing, and industrial applications.
Easily configure redundancy, runtime, and output distribution.
Eligible for US government and public-sector applications.
Lower operating costs and reduced total cost of ownership.
Communication slot for Web/SNMP and Modbus — monitor and manage over the network.
Two series, one modular platform
M90C Series — 208/120V Three-Phase
The North American line, in 2-slot M90C-2S and 6-slot M90C-6S enclosures. Both carry an integrated maintenance-bypass switch, battery modules with an integral DC breaker, and optional receptacle panels that remove external distribution gear. The M90C-6S occupies 17.4″W × 33.7″D. Runtime runs from about 12 minutes at full load on the M90C-2S to roughly 5 hours on the M90C-6S with M90S-BC7 or M90-BC battery cabinets.
M90Ci Series — 400/230V Three-Phase
The 400/230V line, in 2-slot M90Ci-2S and 6-slot M90Ci-6S enclosures, with the same integrated maintenance-bypass switch and the same line-cord and receptacle options. Runtime extends with M90BCi-7 or X90-BC battery cabinets.
Four models at a glance
Two voltages, two enclosure sizes. Every model uses the same modular approach: capacity is added by installing power modules rather than replacing the system, and modules are hot-swappable.
| Model | Voltage | Capacity | Enclosure | Rack mounting | Approvals |
|---|---|---|---|---|---|
| M90C-2S | 208/120V | 5 or 8 kW | 2-slot, 6U | Rackmount-ready | UL-1778, cUL, TAA |
| M90C-6S | 208/120V | Up to 24 kW | 6-slot | M90C Rack Mount Kit | UL-1778, cUL, TAA |
| M90Ci-2S | 400/230V | 10 kW | 2-slot, 6U | Rackmount-ready | CE, RoHS, TAA |
| M90Ci-6S | 400/230V | 10 to 60 kW | 6-slot | M90C Rack Mount Kit | CE, RoHS, TAA |
Unity output power factor throughout, so rated kVA equals usable kW and there is no need to oversize to reach a watt figure. The C Series is the North American 208/120V line and is UL listed; the Ci Series is the 400/230V international line, which is TAA compliant but not UL listed.
Choosing between them
Start with the service. 208/120V points to the C Series, 400/230V to the Ci Series. There is no configuration that crosses between them.
Then size the frame for growth and redundancy. A 2-slot enclosure holds one power module and one battery module, so it is a fixed-capacity system with no room for a redundant module. A 6-slot enclosure leaves room to add capacity and to run one module more than the load requires. Sizing the frame one module above the load is what makes N+1 possible without buying a second system.
Then decide where it lives. The 2-slot models rack-mount as shipped, which suits distributed sites and network rooms. The 6-slot models need the M90C Rack Mount Kit, or they stand on the floor in an electrical room. Past 60 kW, or where the load has left the rack entirely, the M90U platform takes over at 15 to 140 kW.
Optional line-cord & receptacle configurations
M90C-2S systems are available with optional factory-installed line cords and receptacle panels to accelerate deployment, reduce installation cost, and ensure compatibility with standard 208/120V three-phase power:
| Model | Input line cord | Output receptacle panel |
|---|---|---|
| 5 kW | Optional L21-20P | Optional L21-20R |
| 8 kW | Optional L21-30P | Optional L21-30R |
Not sure how much UPS a circuit can support? See Maximum UPS by Circuit.
Who trusts the M90C
Flexible power redundancy for growing server loads.
Minimize downtime with modular hot-swappable modules.
Compact three-phase UPS placed closer to data sources.
Reliable power to maintain uptime for critical communications.
Rugged UPS supporting mission-critical production environments.
The largest deployment base for the M90C, especially the 2-slot models: TAA compliant and UL listed for federal, Department of Defense and VA procurement.
M90C Rack Mount Kit for 6-slot systems
Expand your rack-integration options with the M90C Rack Mount Kit, now available for M90C-6S and M90Ci-6S models. The kit includes ramp, rails, and mounting ears for fast deployment into existing IT infrastructure.
| Model | Power | Voltage | Rack-mount |
|---|---|---|---|
| M90C-2S | 5–8 kW | 208/120V 3-phase | Rack-ready (out of box) |
| M90Ci-2S | 10 kW | 400/230V 3-phase | Rack-ready (out of box) |
| M90C-6S | 5–24 kW | 208/120V 3-phase | With optional rack kit |
| M90Ci-6S | 10–60 kW | 400/230V 3-phase | With optional rack kit |
Watch the M90C Rack Mount Kit installation video →
For guidance on integrating modular UPS into IT racks, see Rack Power Architecture and our rack-mount UPS range.
Compare the M90C
Replacing an Eaton BladeUPS? The M90C is a direct upgrade path — see the dedicated Eaton BladeUPS Replacement guide.
For head-to-head comparisons with leading UPS platforms, explore the M90C Comparison Hub:
Explore the M90C Comparison Hub →
Head-to-head comparisons are also available against the Vertiv Liebert ITA2, Eaton 93E and APC Easy UPS 15 kVA.
Why the TAA-compliant M90C wins
Full modular scalability with hot-swappable modules, so capacity grows and service happens without dropping the load. An integrated maintenance-bypass switch comes standard rather than as a separate cabinet, energy consumption and operating cost stay lower through the load range, and deployment is flexible between rack and floor.
Frequently asked questions
What voltage range does the M90C support?
Can the M90C be rack-mounted?
Are the M90C and M90Ci both UL listed?
Is the M90C a good replacement for Eaton BladeUPS systems?
What line-cord and receptacle options are available?
Can I expand the runtime of the M90C?
Let our specialists design your M90C solution
Our UPS specialists will tailor a solution to your facility’s power-protection needs.