Scalable modular power architecture

The M90S-6S operates as a modular UPS platform within single-phase infrastructure — bridging the gap between rack-level UPS and three-phase facility UPS. Capacity grows incrementally by adding 6 kW power modules, and redundancy is implemented as N+1 within the same system, so UPS capacity aligns to actual load while preserving headroom for future growth. It is typically deployed in electrical rooms supporting distributed infrastructure, where multiple separate UPS would otherwise be required, or in facilities approaching single-phase capacity limits.

What the M90S-6S delivers

The core modular tier

The M90S-6S is the core platform in the M90S modular family, sized for single-phase deployments that need scalable capacity and redundancy in one enclosure — above rack-level UPS, below three-phase facility systems.

Choose the M90S-6S when load is 6–24 kW and you need scalable capacity or N+1 redundancy in a single system; step down to the M90S-2S / 4S for smaller deployments, up to the M90S-12S beyond 24 kW, or across to the three-phase Li90 for facility-level lithium.

Modular vs traditional UPS

Traditional fixed-capacity UPS must be oversized up front or replaced as infrastructure grows. A modular platform lets capacity, redundancy, and runtime scale incrementally within one system.

M90S vs the modular field

Against the modular platforms it most often replaces, the M90S’s unity power factor and larger 6 kVA blocks stand out. Full per-capacity matchups are in the comparison hub.

Four capacities in one enclosure

All configurations share one enclosure (17.4 × 33.7 × 45.5 in) with six slots — four universal (power or battery) plus two battery-only, a maximum of four 6 kW power modules (24 kW). For N+1, add one power module beyond the load, so redundancy is available up to 18 kW (three load modules plus one redundant); at 24 kW all four power slots carry load, so the 24 kW configuration is a maximum-capacity, non-redundant build. Output is via terminal blocks and/or up to four configurable receptacle panels (NEMA 5-15/20R, L6-20/30R, L14-30R, IEC C19); the 6 kVA configuration offers a factory L14-30P line cord.

Runtime by load and battery module count

Runtime in minutes by kW configuration and number of installed battery modules, grouped by the battery-cabinet stage required (the 6S enclosure holds 5 modules; each BC7 cabinet adds 7). The stepped line tracks the six-slot enclosure sharing power and battery slots: the internal-battery maximum falls as more power modules are installed (5 modules at 6 kW down to 2 at 24 kW), with each BC7 cabinet adding seven slots beyond it. An asterisk marks runtimes that need an additional power module for recharge; a dash means that module count does not apply to the configuration.

Estimated minutes; values vary with battery age and site conditions. A maximum of eight battery modules is supported per power module; an asterisk (*) marks runtimes that require an additional power module for battery recharge. For longer runtimes or configurations beyond 15 modules, contact Xtreme Power engineering at (800) 582-4524 or sales@xpcc.com.

Where the M90S-6S is deployed

The M90S-6S is deployed across telecommunications infrastructure, industrial automation systems, broadcast environments, commercial facilities, and distributed technology environments — typically in electrical rooms supporting distributed infrastructure, where load is growing, redundancy is required within a single system, or multiple separate UPS have become difficult to manage but a three-phase upgrade is not yet warranted.

Rack deployment

The M90S supports rack-based deployment with the M90S-RMK rack-mount kit and integrated mounting hardware, installing in standard equipment racks while keeping modules serviceable. Watch a short rack-installation overview:

M90S-6S specifications

Documents and related links