M90S modular UPS comparisons
The Xtreme Power M90S is a modular online double-conversion single-phase UPS family — 2S, 4S, 6S, and 12S — scaling from 6 kW to 48 kW with hot-swappable power and battery modules, unity power factor (kVA = kW), N+1 redundancy, integral maintenance bypass, and TAA compliance. This hub is the reference for evaluating the M90S against the modular and high-capacity single-phase platforms it most often replaces: APC Symmetra LX, Eaton 9PXM, Vertiv Liebert APS, Toshiba 3000 SP, and RoseWater Energy HUB — each in a capacity-matched, head-to-head comparison.
Modular single-phase UPS deployment
Modular UPS platforms let capacity, redundancy, and runtime scale incrementally within one system — adding 6 kW power modules as load grows and configuring N+1 redundancy without deploying multiple separate UPS. The M90S targets single-phase environments needing centralized protection from a few kW up to 48 kW, where three-phase utility is unavailable, impractical, or not cost-effective. Selection turns on usable power factor, module size, efficiency, runtime, maintenance bypass, footprint, and TAA-compliant procurement.
Four platforms from 6 to 48 kW
| Model | Capacity | Slots / form factor | Typical deployment |
|---|---|---|---|
| M90S-2S | 6 kW | 2-slot · rack-mountable | Entry modular, single rack |
| M90S-4S | 6–12 kW | 4-slot · rack-mountable | Scalable rack and edge sites |
| M90S-6S | 6–24 kW | 6-slot · rack-mountable | Core modular, electrical rooms |
| M90S-12S | 6–48 kW | 12-slot · floor-standing, hardwired | High-capacity centralized single-phase |
Shared platform characteristics: online double-conversion topology, unity power factor (kVA = kW), hot-swappable power and battery modules, N+1 redundancy, integral maintenance bypass, up to 98% ECO-mode efficiency, UL-1778 (TUV) / cUL listing, TAA compliance, and a 3-year electronics and battery warranty (USA & Canada). The 2S, 4S, and 6S are rack-mountable with the M90S-RMK kit; the 12S is floor-standing and hardwired.
M90S competitive comparisons by competitor
Each competitor links to a detailed, capacity-matched comparison against the corresponding M90S model. The “where the M90S leads” column summarizes the M90S’s primary advantages; competitor strengths — footprint, native rack/tower conversion, onsite warranty, TAA parity — are documented honestly on each page.
APC Symmetra LX| M90S model | Competitor | Capacity | Where the M90S leads | Detailed comparison |
|---|---|---|---|---|
| M90S-2S | APC Symmetra LX (SYA8K8RMP) | 6–8 kVA | Unity PF vs 0.80, up to 98% efficiency, TAA; Symmetra LX discontinued | Full comparison → |
| M90S-4S | APC Symmetra LX (SYA12K16RMP) | 12 kVA | More usable kW at unity PF, 98% efficiency, current TAA platform | Full comparison → |
| M90S-6S | APC Symmetra LX (SYA16K16RMP) | 16–18 kVA | Unity PF usable kW, TAA, supported platform (APC more compact at 19U) | Full comparison → |
| M90S model | Competitor | Capacity | Where the M90S leads | Detailed comparison |
|---|---|---|---|---|
| M90S-4S | Eaton 9PXM (9PXM8S12K) | 12 kVA | Unity PF vs 0.90, longer internal runtime, integral maintenance bypass | Full comparison → |
| M90S-6S | Eaton 9PXM (9PXM12S16K) | 16–18 kVA | Unity PF usable kW, module-level diagnostics (Eaton TAA, rack/tower native) | Full comparison → |
| M90S-6S (18 kW) | Eaton 9PXM (9PXM12S20K) | 18 kVA | Larger 6 kW blocks, integral bypass (usable kW parity at 18 kW) | Full comparison → |
| M90S model | Competitor | Capacity | Where the M90S leads | Detailed comparison |
|---|---|---|---|---|
| M90S-6S (12 kW) | Vertiv Liebert APS (AS5B0NCVGNNXLKB) | 12 kW | Unity PF, battery energy, TAA compliance | Full comparison → |
| M90S-6S (18 kW) | Vertiv Liebert APS (AS6C0NCWGNNXLKB) | 18 kW | Unity PF usable kW, runtime, TAA compliance | Full comparison → |
| M90S model | Competitor | Capacity | Where the M90S leads | Detailed comparison |
|---|---|---|---|---|
| M90S-6S (12 kW) | Toshiba 3000 SP | 12 kW | Smaller cabinet, scalable capacity (unity PF / output parity) | Full comparison → |
| M90S-6S (18 kW) | Toshiba 3000 SP | 18 kW | Smaller footprint, modular growth (Toshiba onsite warranty) | Full comparison → |
| M90S model | Competitor | Capacity | Where the M90S leads | Detailed comparison |
|---|---|---|---|---|
| M90S-12S | RoseWater Energy HUB20 | 20 kW class | Modular 6–48 kW, fully rated rectifier, 98% ECO, TAA (HUB onsite warranty) | Full comparison → |
| M90S-12S | RoseWater Energy HUB40 | 40 kW class | Modular scalability, one cabinet vs two, fully rated rectifier, TAA | Full comparison → |
Competitor figures are taken from Xtreme Power’s published comparison datasheets; confirm per SKU against current vendor documentation. The APC Symmetra LX is discontinued. The Eaton 9PXM is TAA-compliant and natively rack/tower-convertible, with usable-kW parity at 18 kW. The Toshiba 3000 SP matches the M90S on unity power factor and rated output and includes onsite warranty. The RoseWater HUB includes onsite service in its warranty, and the HUB20 has a marginally smaller footprint than the M90S-12S.
M90S platforms and adjacent systems
Six-slot modular online UPS, 6–24 kW, with unity power factor and N+1 redundancy for electrical rooms and racks.
View the M90S-6S →Twelve-slot hardwired platform scaling to 48 kW — centralized single-phase protection where three-phase is unavailable.
View the M90S-12S →Lithium three-phase facility UPS for deployments that exceed practical single-phase capacity limits.
View the Li90 →Planning a modular UPS deployment?
Xtreme Power supports module configuration, N+1 redundancy planning, runtime sizing, single-phase vs three-phase strategy, and competitive replacement across commercial, telecom, industrial, and residential infrastructure.