M90C-2S – Compact Modular Rack Three-Phase UPS
5kVA / 8kVA
208/120 VAC Three-Phase
High-efficiency modular UPS with maintenance bypass, optional receptacle panels, and TAA compliance for continuous power in IT and industrial environments.
TAA compliant · UL-1778 / cUL · 5–8 kW · 208 / 120 VAC three-phase · compact rack-integrated modular UPS
M90C-2S compact three-phase modular rack UPS
The M90C-2S is a compact, rack-integrated three-phase modular UPS — 5 or 8 kW of online double-conversion protection in a 6U chassis. Built on a dual-slot architecture (one power module, one battery module), it brings centralized three-phase continuity into standard racks for federal, healthcare, enterprise IT, and industrial environments where space and procurement compliance are critical. It is TAA compliant and UL-1778 / cUL listed, which is why most of these go into federal and VA programs. Unity output power factor (kVA = kW), an integral maintenance bypass, and configurable line-cord, receptacle or hardwired connection. 2-year warranty (USA and Canada) and a $50,000 load protection policy (USA and Canada).
Centralized three-phase continuity in a rack
The M90C-2S delivers centralized three-phase protection within standard rack deployments — supporting modernization of legacy fixed-capacity UPS while simplifying service workflows and runtime scalability. Its dual-slot architecture uses one power module and one battery module in a compact 6U chassis, enabling phased runtime expansion without chassis replacement. Unlike floor-standing three-phase UPS, the rack-integrated approach brings continuity into existing rack infrastructure, in micro-data-center, secure IT, clinical-technology, edge-aggregation, and industrial-control environments.
Federal, VA & healthcare-ready
With TAA compliance, modular serviceability, and a compact rack footprint, the M90C-2S is positioned for regulated U.S. infrastructure — VA medical facilities, federal data centers and secure IT rooms, Department of Defense infrastructure, government research laboratories, and federally funded modernization programs. Its compact rack-integrated form factor supports phased deployment within existing IT and clinical-technology rooms — without electrical-room reconstruction — aligning with healthcare modernization efforts such as VA Electronic Health Record Modernization (EHRM), where clinical-system availability and procurement compliance are critical.
What the M90C-2S delivers
Unity PF (1.0) delivers full use of installed electrical capacity — kVA = kW — reducing the oversizing common to legacy three-phase UPS, with best-in-class efficiency up to 98% ECO mode.
A built-in maintenance bypass allows service or replacement without disrupting protected loads, eliminating external bypass panels and improving lifecycle serviceability — particularly valued in federal and healthcare deployments.
Centralized three-phase continuity in a compact 6U rack chassis (mountable in a standard 19-inch rack, or as a tower on a caster base) — bringing protection into existing rack infrastructure instead of a separate floor-standing unit.
The dual-slot architecture scales runtime while keeping a consistent rack footprint; battery modules can be added (up to 8 per power module) for phased runtime expansion without chassis replacement.
Deploy hardwired, or with an optional input line cord (L21-20P at 5 kW, L21-30P at 8 kW) and configurable receptacle panels, each with an integral breaker (M90C-RPI for L21-20R, M90C-RPJ for L21-30R) — one panel per enclosure.
Best-in-class efficiency for the lowest energy and heat, LCD power metering per phase and system summary, and a $50,000 connected-equipment load-protection policy.
Rack-mounted, front and rear
Installed in a standard rack: the front (right) presents the power module with cooling fans and the per-phase LCD over the battery module; the rear (left) exposes the input and output breakers, the integral maintenance bypass and maintain switch, and the receptacle panel with its input line cord — no external bypass panel required.
The compact rack three-phase tier
The M90C platform is the compact, rack-integrated three-phase modular tier within the Xtreme Power modular ecosystem — sitting between single-phase modular and facility-scale three-phase systems. Rack-integrated platforms like the M90C are selected when continuity must deploy inside rack environments, electrical-room expansion is constrained, localized centralized protection is required, or federal procurement compliance is necessary.
Within the M90C platform: the M90C-2S (5–8 kW) is optimized for secure rack deployments and localized continuity; the M90C-6S (5–24 kW) supports higher-density aggregation and extended runtime. There is also a 400 V global sibling, the M90Ci-2S.
M90C-2S or facility-scale M90U?
Rack-integrated modular platforms such as the M90C-2S are selected when continuity must deploy within rack environments, electrical-room expansion is constrained, or federal and healthcare modernization (such as VA EHRM) calls for phased, in-rack deployment. Facility-scale modular platforms such as the M90U are selected when continuity capacity exceeds rack-deployment thresholds, centralized electrical-room deployment is preferred, or enterprise-scale load growth is anticipated.
Two configurations, 5–8 kW
| Model | Capacity (kVA / kW) | Input (cord option) | Receptacle panel | Architecture |
|---|---|---|---|---|
| M90C-2S5K | 5 / 5 | Terminal blocks or L21-20P | M90C-RPI (L21-20R + breaker) | 2-slot (1 power + 1 battery) |
| M90C-2S8K | 8 / 8 | Terminal blocks or L21-30P | M90C-RPJ (L21-30R + breaker) | 2-slot (1 power + 1 battery) |
Both models are 6U (17.3 × 31.5 × 10.5 in, 34 lbs) with unity output power factor and a ±96 VDC (default) or ±120 VDC battery system, 4 A charging. Output is hardwired (terminal blocks) or via one optional receptacle panel per enclosure. Up to 8 battery modules are supported per power module via the optional extended battery cabinet.
Runtime by load
Estimated runtime in minutes at the base configuration (one power module and one battery module), by load. The 5 kW model is rated to 5 kW; the 8 kW model extends to 8 kW.
| Model | 1 kW | 2 kW | 3 kW | 4 kW | 5 kW | 6 kW | 7 kW | 8 kW |
|---|---|---|---|---|---|---|---|---|
| M90C-2S5K | 85 | 38 | 22 | 15 | 12 | — | — | — |
| M90C-2S8K | 85 | 38 | 22 | 15 | 12 | 9 | 7 | 6 |
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 M90C-2S is deployed
The M90C-2S is deployed where compact, compliant three-phase continuity is required — VA medical and federal data-center / secure IT rooms, Department of Defense and government research infrastructure, micro-data-centers and edge-compute aggregation, secure healthcare technology environments, and industrial control clusters — particularly in space-constrained sites and phased modernization programs such as VA EHRM.
M90C-2S specifications
| Models | M90C-2S5K (5 kVA / 5 kW) and M90C-2S8K (8 kVA / 8 kW) — unity PF (kVA = kW) |
| Topology | Compact modular online double-conversion, three-phase; 2-slot (1 power + 1 battery module) |
| Input | 120/208V three-phase, 50/60 Hz auto-sensing (3PH+N+G); range 152–269 VAC (L-L), 40–70 Hz; terminal blocks or L21-20P (5K) / L21-30P (8K) line cord |
| Output | 120/208V, 50/60 Hz ±0.1 Hz (3PH+N); terminal blocks or optional receptacle panel; THD ≤2% (linear), ≤3% (non-linear) |
| Efficiency | Up to 98% ECO mode, 93% 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 ±96 VDC or ±120 VDC (±96 VDC default); max charging 4 A (adjustable); up to 8 battery modules per power module |
| Power module | 16.3 × 24 × 5.2 in, 38 lbs |
| Battery module | 16.3 × 24 × 5.2 in, 107 lbs |
| Enclosure | 17.3 × 31.5 × 10.5 in (6U), 34 lbs; rack or tower (caster base) |
| Maintenance bypass | Integral maintenance bypass (no external bypass panel required) |
| Display | 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 5,200 ft; audible noise <58 dBA at 1 m |
| Approvals | UL-1778, cUL, FCC Class A, RoHS, TAA compliant |
| Warranty | 2 years (USA and Canada); 1 year outside the USA and Canada; $50,000 load protection policy (USA and Canada) |
| Options | L21-20P / L21-30P line cord, receptacle panel, extended battery cabinet, caster base, 4-post rail kit, 5-year extended warranty |
M90C-2S: common questions
What is the M90C-2S?
A compact three-phase modular UPS: 5 or 8 kW of online double-conversion protection in a 6U rack chassis, with one power module and one battery module in a two-slot architecture. It brings 208/120V three-phase continuity into a standard rack rather than an electrical room.
Can the M90C-2S run N+1?
No. The two-slot chassis holds one power module and one battery module, so there is no second power module to be redundant with. Sites needing N+1 in a rack should look at the M90C-6S; sites needing facility-scale redundancy should look at the M90U.
How is it connected?
Hardwired to terminal blocks, or with a factory-installed line cord: L21-20P on the 5 kW model and L21-30P on the 8 kW. Output is through the terminal blocks or one optional receptacle panel, the M90C-RPI (L21-20R) or M90C-RPJ (L21-30R), one panel per enclosure.
How is runtime extended?
Up to eight battery modules are supported per power module, using the extended battery cabinet. Runtime scales with the module count at a given load.
What makes the M90C-2S suitable for federal procurement?
It is TAA compliant and UL-1778 and cUL listed, with FCC Class A and RoHS, so it clears both the procurement rule and the listing requirement that federal and VA projects apply. The 6U rack-integrated form matters as much: three-phase protection drops into an existing rack instead of requiring electrical-room work, which suits phased modernization programs where the building cannot be taken apart. Federal, Department of Defense, VA medical and government research sites are the largest deployment base for this model.
Is the M90C-2S TAA compliant?
Yes, and it is UL-1778 and cUL listed, with FCC Class A and RoHS. That combination suits federal, Veterans Affairs and healthcare procurement, which is where much of this product is deployed.
What warranty comes with it?
Two years in the USA and Canada, one year outside the USA and Canada, with a $50,000 connected-equipment load protection policy in the USA and Canada. A five-year extended warranty is available.
Documents and related links
Plan secure modular infrastructure
Talk to an Xtreme Power specialist about rack-integrated three-phase continuity, runtime sizing, receptacle-panel and line-cord selection, and TAA-compliant deployment aligned with federal procurement and healthcare-modernization strategy.