M90S-12S Modular UPS – 6–48kW High-Capacity Single-Phase UPS with N+1 Redundancy

The M90S-12S is a modular online double-conversion UPS designed for applications requiring 30kVA+ power levels within single-phase electrical infrastructure.

Built on a 12-slot architecture using 6 kW power modules, the system scales from 6 kW to 48 kW while supporting redundancy, runtime expansion, and phased deployment within a single platform.

This enables centralized, high-capacity power continuity in environments where three-phase power is not available, not practical, or not cost-effective to deploy.

Key Specifications

• 6–48 kW capacity
• 208/120V or 240/120V single phase
• Online double-conversion topology
• 6 kW modular power blocks
• 12 universal slots (power or battery)
• N+1 redundancy capable
• Modular battery expansion
• Hardwired input and output connections
• 3-year warranty (USA & Canada)
• TAA compliant

Datasheet:
https://xpcc.com/wp-content/uploads/M90S-12S-flyer.pdf

High-Capacity Single-Phase UPS (30kVA+ Without 3-Phase Power)

M90S-12S addresses a critical gap in power infrastructure: delivering high-capacity UPS protection in single-phase environments.

In many real-world applications, three-phase utility is not available or cannot be economically deployed. These include:

• large residential and whole-home UPS systems
• telecommunications and cell tower sites
• remote or distributed infrastructure locations
• light industrial and commercial facilities

M90S-12S enables these environments to achieve 30kVA+ centralized UPS capacity using single-phase power, eliminating the need for costly electrical upgrades or infrastructure redesign.

For residential applications:
https://xpcc.com/whole-home-ups-m90s-12s/

Scalable Modular Power Architecture

M90S-12S enables capacity and redundancy to be built incrementally within a single system.

Power modules can be added as infrastructure grows, while N+1 redundancy can be configured to maintain continuity during module-level failures.

This supports long-term infrastructure planning without requiring full system replacement.

Where M90S-12S Fits in Power Architecture

M90S-12S operates as the highest-capacity centralized UPS platform within single-phase infrastructure.

It is typically deployed:

• in electrical rooms supporting distributed infrastructure
• in facilities approaching single-phase capacity limits
• in environments where centralized UPS simplifies multi-system deployment

Within the Xtreme Power architecture:

• P91 → rack-level UPS
• T91 → long-runtime UPS
• M90S-6S → core modular UPS
• M90S-12S → high-capacity modular UPS (this platform)
• Li90 → three-phase facility UPS

For architecture context:
https://xpcc.com/rack-power-architecture/

Modular UPS vs Traditional UPS

Traditional UPS systems are fixed-capacity and require oversizing or full replacement as infrastructure grows.

M90S-12S enables capacity, redundancy, and runtime to be scaled incrementally within a single system.

Key Differences

Architecture	Modular UPS (M90S)	Traditional UPS
Capacity Scaling	Add modules as needed	Fixed capacity
Redundancy	Built-in (N+1)	Requires multiple systems
Runtime	Modular battery expansion	Less flexible
Maintenance	Module-level service	Full system service
Lifecycle	Extendable	Replace at capacity

Single-Phase vs Three-Phase UPS Strategy

M90S-12S introduces a key infrastructure decision: continue scaling within single-phase architecture or transition to three-phase UPS systems.

Single-phase modular UPS is typically preferred when:

• three-phase utility is not available (common in residential and remote sites)
• electrical upgrades are cost-prohibitive or disruptive
• infrastructure requires 20–40 kW range without facility redesign
• deployment speed and simplicity are priorities

Three-phase UPS becomes appropriate when:

• facility power density exceeds practical single-phase limits
• infrastructure is designed for large centralized UPS systems
• enterprise-scale expansion is required

M90S-12S provides a practical alternative to three-phase UPS systems in the 6–48 kW range.

Electrical Integration and Deployment

M90S-12S is designed for hardwired electrical integration within dedicated electrical infrastructure.

Unlike smaller M90S platforms, it does not use line cords or receptacle-based distribution. This supports higher power levels, improved electrical reliability, and alignment with facility-level power architecture.

When to Use a High-Capacity Single-Phase UPS

M90S-12S is typically selected when:

• infrastructure requires 30kVA+ capacity on single-phase power
• three-phase utility is not available or practical
• centralized redundancy is required
• distributed UPS deployment becomes difficult to manage
• phased infrastructure growth is planned

Replace APC / Eaton UPS Systems

M90S-12S is commonly deployed as a replacement for:

• multiple distributed UPS systems
• fixed-capacity single-phase UPS platforms
• legacy modular UPS systems

Explore comparisons:
https://xpcc.com/m90s-modular-ups-competitive-comparisons/

Typical Applications

M90S-12S is deployed across high-capacity single-phase environments including:

• large residential and whole-home UPS systems
• telecommunications and cell tower infrastructure
• remote and off-grid installations
• industrial automation systems
• commercial electrical rooms
• distributed compute infrastructure

Capacity Guidance

Capacity is defined by module configuration:

• 6–12 kW → initial deployment
• 18–30 kW → growing infrastructure
• 36–48 kW → high-capacity deployment
• N+1 → redundancy configuration

UPS sizing tool:
https://xpcc.com/selector

M90S Modular Platform Options

• M90S-2S → 6 kW
• M90S-4S → 6–12 kW
• M90S-6S → 6–24 kW
• M90S-12S → up to 48 kW (this platform)

Explore full platform:
https://xpcc.com/m90s-single-phase-modular-ups/

Technical Summary

Topology: Online double conversion
Capacity: 6–48 kW
Voltage: 208/120V or 240/120V
Architecture: Modular
Slots: 12
Redundancy: N+1 capable
Battery: Modular expansion
Installation: Hardwired

Plan With Confidence

Xtreme Power Conversion supports engineers, consultants, and infrastructure planners in designing modular UPS systems for scalable capacity, redundancy, and long-term infrastructure growth.

Phone: (800) 582-4524
Email: sales@xpcc.com