Core modular platform for global single-phase

The M90Si-6S is designed for international single-phase environments that require higher capacity and flexible deployment. Capacity is increased incrementally by adding 10 kW power modules, while redundancy is implemented with an N+1 configuration in the same system — letting infrastructure planners align UPS capacity with actual load while keeping flexibility for future expansion. Hot-swappable power and battery modules provide rapid maintenance, and an in-frame maintenance bypass removes the need for external connection components.

What the M90Si-6S delivers

The core international modular tier

The M90Si-6S is the core modular UPS platform for global single-phase infrastructure — typically deployed in electrical rooms and telecom environments, across distributed international sites, where centralized UPS simplifies multi-system deployment. It is the 208–240 V counterpart to the 120 V M90S family.

Choose the M90Si-6S for 10–30 kW of scalable single-phase protection at 208–240 V, with N+1 redundancy up to 20 kW. When the facility moves to three-phase 400 V, follow the rack-integrated path from the entry-tier M90Ci-2S (10 kW) to the scalable M90Ci-6S (10–60 kW) and the high-density Ai90 (50–70 kW, 13U). For rack-level lithium protection, see the J90i, and for long-runtime online needs the P91g and T91i.

Scale incrementally instead of oversizing

Traditional UPS systems must be oversized up front or replaced as infrastructure grows. The M90Si-6S lets capacity, redundancy, and runtime scale incrementally within a single system.

Three configurations, 10–30 kW

All models share a 6-slot enclosure (3 universal slots that take a power or battery module, plus 3 battery-only slots) — a maximum of three 10 kW power modules (30 kW). For N+1, add one power module beyond the load, so redundancy is available up to 20 kW (two load modules plus one redundant); at 30 kW all three power slots carry load, so the 30 kW configuration is a maximum-capacity, non-redundant build. Unity output power factor. Battery system is ±192 VDC (default) or ±240 VDC; each battery module holds 32 × 12V 5Ah cells. Up to 8 battery modules are supported per power module; the optional BC-7 (±192 V) or X90-BC (±240 V) cabinet adds 7 battery slots each.

Hardwired electrical integration

The M90Si-6S is designed for hardwired electrical integration within global infrastructure. Unlike smaller plug-and-deploy UPS, it does not use line cords or receptacle-based distribution — input and output land on terminal blocks — supporting higher-capacity deployment, improved electrical reliability, and alignment with facility-level power architecture. M90Si systems support rack-based deployment with integrated mounting and modular access, enabling installation in standard equipment racks while maintaining serviceability.

Runtime by load and battery module count

Runtime in minutes by number of installed battery modules across the 10, 20, and 30 kW configurations. The banner shows the cabinet configuration — internal slots (UPS), plus the optional BC-7 / X90-BC battery cabinets (UPS + 1 BC7, UPS + 2 BC7). 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 internal modules at 10 kW, 4 at 20 kW, 3 at 30 kW), with each BC7 cabinet adding seven more slots beyond it.

Estimated minutes; values vary with battery age and site conditions. A maximum of 8 battery modules can be recharged per power module — an additional power module is required for battery recharge beyond 8 modules. For extended runtimes, consult Xtreme Power Sales regarding the X90-BC (±240 VDC) at (800) 582-4524 or sales@xpcc.com.

Built for global edge and distributed infrastructure

Many international deployments run on single-phase power. The M90Si-6S brings centralized UPS protection with scalable capacity and redundancy to these environments — without three-phase electrical infrastructure — across telecommunications and cell-tower sites, edge compute and containerized systems, distributed commercial facilities, industrial automation, broadcast, and remote installations. It is typically selected when infrastructure is expected to grow, redundancy is required in a single system, distributed UPS are hard to manage, runtime exceeds rack-UPS capability, or international deployment standardization is required.

Rack installation

M90Si modular systems support rack-based deployment with integrated mounting and modular access. The short video below shows the modular rack-installation approach.

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M90Si-6S specifications

Documents and related links