M90Ci-2S Modular UPS – 10kW 400/230V Rack-Mounted Three-Phase UPS System
10 kW | 400/230V | Rack-Mounted Modular Three-Phase UPS
Compact rack-mounted three-phase UPS system designed for 400 V infrastructure requiring localized power protection, modular serviceability, and simplified deployment.
10 kW · 400 / 230 VAC Three-Phase WYE · Compact Rack-Mounted Online Modular UPS
M90Ci-2S compact 400V three-phase modular rack UPS
The M90Ci-2S is a compact, rack-mounted three-phase modular UPS for global 400 V infrastructure — 10 kW of online double-conversion protection in a 6U chassis, with an integrated battery module and integrated maintenance bypass. Supporting 380/220 V, 400/230 V, and 415/240 V three-phase (WYE), it brings localized three-phase protection directly into the rack for modern data centers, industrial systems, and distributed compute — without a centralized UPS. Unity output power factor (kVA = kW), up to 98% ECO / 94.5% online efficiency, hardwired install, and a 2-year warranty.
Three-phase 400V continuity in the rack
The M90Ci-2S enables three-phase 400 V UPS protection directly within the rack environment. By integrating power and battery modules into a compact 6U chassis, it supports localized three-phase protection without a centralized UPS — reducing infrastructure footprint, simplifying deployment, and improving service accessibility. This aligns with the distributed power architectures used in modern data centers and industrial systems, delivering continuous conditioned power isolated from upstream disturbances with unity power factor and high operating efficiency.
What the M90Ci-2S delivers
Unity PF (kVA = kW) ensures full real-power delivery and full use of installed capacity — avoiding the oversizing common to legacy three-phase UPS — with efficiency up to 98% ECO mode and 94.5% online.
A maintenance bypass within the UPS frame enables safe transfer of the critical load to utility power for service, eliminating external bypass connections and reducing installation cost and downtime.
Localized 400 V three-phase protection in a compact 6U rack chassis (17.3 × 31.5 × 10.5 in) — rack-mount rail kits or a tower caster base — instead of a separate centralized floor-standing system.
A modular back-plane-connector design with separate power and battery modules eases installation and maintenance, allowing simplified module replacement and reduced downtime in a 2-slot chassis.
Designed for permanent installation with hardwired input and output, supporting reliable three-phase integration aligned with facility-level 400 V power architecture.
Best-in-class efficiency provides the lowest energy consumption and heat output, with LCD power metering for individual phases and a system summary.
The compact 400V entry platform
The M90Ci-2S is the compact entry platform within the M90Ci family of 400/230 V modular three-phase UPS systems — typically deployed in rack-integrated environments needing localized three-phase power across modern 400 V infrastructure, including edge data centers, industrial systems, and distributed compute. It is the 400 V counterpart to the 208/120 V M90C-2S.
Choose the M90Ci-2S for 10 kW of rack-integrated 400 V three-phase protection; step up to the M90Ci-6S (10–60 kW) for scalable capacity or the high-density Ai90 (50–70 kW); for North American 208/120 V deployments, see the M90C-2S.
Rack-integrated instead of centralized
Traditional three-phase UPS systems are centralized, fixed in capacity, and require larger electrical-room infrastructure. The M90Ci-2S delivers three-phase power in a compact modular architecture, enabling localized deployment within the rack — simplifying installation, reducing infrastructure requirements, and improving serviceability. It is commonly deployed to replace compact three-phase UPS and modular platforms from Eaton and Vertiv, and is a strong replacement for legacy Eaton BladeUPS systems migrating to modern 400 V architectures.
Hardwired electrical integration
The M90Ci-2S is designed for permanent installation with hardwired input and output connections. The integrated maintenance bypass enables safe load transfer during service, while modular power and battery components allow simplified replacement and reduced downtime. Input accepts 380/220 V, 400/230 V, or 415/240 V three-phase (WYE), 50/60 Hz auto-sensing, across a wide 190–520 VAC range.
Runtime by load
Estimated runtime in minutes at the base configuration (one power module and one battery module), by load from 1 to 10 kW.
| Model | 1 kW | 2 kW | 3 kW | 4 kW | 5 kW | 6 kW | 7 kW | 8 kW | 9 kW | 10 kW |
|---|---|---|---|---|---|---|---|---|---|---|
| M90Ci-2S-10K | 104 | 44 | 28 | 20 | 15 | 12 | 9 | 7 | 5 | 4 |
Estimated minutes; values vary with battery age and site conditions. Runtime extends by adding battery modules (up to 8 per power module) via the optional extended battery cabinet. For runtime sizing, contact Xtreme Power at (800) 582-4524 or sales@xpcc.com.
Where the M90Ci-2S is deployed
The M90Ci-2S supports edge data centers, industrial automation systems, enterprise IT, and telecom infrastructure requiring localized three-phase power — particularly distributed compute environments and facilities transitioning to 400 V architectures. Its compact rack-integrated form factor brings continuity into existing rack infrastructure without a centralized electrical-room buildout.
M90Ci-2S specifications
| Model | M90Ci-2S-10K — 10 kVA / 10 kW (unity PF, kVA = kW) |
| Topology | Compact modular online double-conversion, three-phase; 2-slot (1 power-only + 1 battery-only) |
| Input | 380/220V, 400/230V, 415/240V three-phase (WYE), 50/60 Hz auto-sensing; range 190–520 VAC (L-L), 40–70 Hz; hardwired |
| Output | 380/220V, 400/230V, 415/240V three-phase, 50/60 Hz ±0.1 Hz; hardwired |
| Efficiency | Up to 98% ECO mode, 94.5% online mode |
| Overload | 100–110% for 30 min; 110–130% for 5 min; 130–150% for 10 s; >150% for 200 ms |
| Battery system | Nominal ±192 or ±240 VDC (±192 V default); max charging 4 A (adjustable); integrated battery module, up to 8 battery modules per power module |
| Enclosure | 17.3 × 31.5 × 10.5 in (6U), 34 lb; 2 slots (1 power-only + 1 battery-only); rack-mount or tower (caster base) |
| Maintenance bypass | Integrated maintenance bypass (no external bypass required) |
| Display | Power-module LCD — power metering per phase and system summary |
| Communications | RS-232, USB, EPO; intelligent slot for optional card (Web/SNMP, Relay, Modbus) |
| Environment | 0–40°C (32–104°F); altitude 1,585 m; audible noise <58 dBA at 1.6 m. Battery life reduced above 30°C; capacity derates above 30°C and 5,200 ft. |
| Approvals | UL1778 (power module), CE |
| Warranty | 2 years electronics, 2 years battery (USA and Canada) |
| Options | Extended battery cabinet, caster base, 4-post rail kit |
Documents and related links
Plan your 400V rack continuity
Talk to an Xtreme Power specialist about rack-integrated 400 V three-phase protection, runtime sizing with the extended battery cabinet, hardwired electrical integration, and modernizing legacy BladeUPS deployments.
| MODEL NUMBER | M90Ci-2S-10K | |
| CAPACITY | Power Rating | 10kVA/10kW |
| INPUT | Voltage/Frequency Nominal | 380/220V, 400/230V, 415/240V three-phase, 50/60Hz auto-sensing |
| Voltage/Frequency Range | 190-520VAC* (L-L) / 40–70Hz | |
| OUTPUT | Voltage & Frequency | 380/220V, 400/230V, 415/240V three-phase 50/60 Hz +/- 0.1Hz |
| Efficiency | 98% ECO mode and 94.5% online mode | |
| Overload Capacity | 100% – 110% for 30 min; 110% – 130% for 5min; 130% – 150% for 10s; > 150% for 200ms | |
| BATTERY SYSTEM | Nominal Voltage | +/-192 or +/-240VDC (+/192V default) |
| Max charging (adjustable) | 4A | |
| SYSTEM ENCLOSURE | Dimensions & Weight | 17.3”W x 31.5”D x 10.5”H (6U) / 34 lbs |
| Maximum Capacity | 10kVA/10kW | |
| Enclosure Capacity | 2 slots including 1 power module only slot + 1 battery module only slot | |
| Output Connections | Hardwired or optional output cord/receptacles | |
| ENVIRONMENT | Temperature | 0–40°C (32–104°F)** |
| Altitude | 1585 meters above sea level** | |
| Audible noise | < 58dBA at 1.6 m | |
| APPROVALS | UL1778 Power Module, CE | |
| COMMUNICATIONS INTERFACE | RS-232, USB, EPO, intelligent slot for optional cards (Web/SNMP, Relay, Modbus) | |
| INCLUDED IN BOX | User manual, USB cable, RS-232, ViewPower software | |
| AVAILABLE OPTIONS | Extended battery cabinet, caster base, 4-post rail kit | |
