M90S-2S Modular UPS – 6kW Single-Phase Centralized UPS

The M90S-2S is a modular online double-conversion UPS designed for facilities where power requirements exceed rack-level UPS capability but remain within single-phase electrical infrastructure.

Built on a 2-slot architecture using 6 kW power modules, the system delivers 6 kW of centralized capacity while enabling modular serviceability and flexible runtime configuration within a compact platform.

This provides a practical entry point into centralized UPS architecture without the complexity of larger modular systems.

Key Specifications

• 6 kW capacity
• 208/120V or 240/120V single phase
• Online double-conversion topology
• 6 kW modular power blocks
• 2 universal slots (power or battery)
• Modular battery expansion
• Configurable output distribution
• Input connection: L14-30P
• 3-year warranty (USA & Canada)
• TAA compliant

Datasheet:
https://xpcc.com/wp-content/uploads/M90S-2S-flyer.pdf

Modular UPS Architecture

The M90S-2S uses a modular UPS architecture that enables subsystem-level serviceability within a centralized platform.

Unlike traditional fixed UPS systems, individual power and battery modules can be serviced or replaced without removing the entire system. This reduces downtime and simplifies maintenance in compact electrical environments.

While the 2-slot configuration is not intended for capacity scaling or N+1 redundancy, it provides a foundation for centralized modular UPS deployment within single-phase infrastructure.

Where M90S-2S Fits in Power Architecture

M90S-2S operates as an entry-tier centralized UPS platform within distributed infrastructure.

It is typically deployed:

• in electrical rooms supporting localized infrastructure
• where multiple small UPS systems would otherwise be used
• in facilities transitioning from distributed to centralized UPS design

Within the Xtreme Power architecture:

• P91 → rack-level UPS
• T91 → long-runtime tower UPS
• M90S-2S → centralized modular UPS (entry platform)
• M90S-4S / 6S / 12S → scalable modular UPS
• Li90 → three-phase facility UPS

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

Centralized vs Distributed UPS Strategy

As infrastructure grows, managing multiple distributed UPS systems can increase complexity.

M90S-2S simplifies this by centralizing power protection into a single system, enabling:

• unified runtime planning
• simplified maintenance
• reduced system fragmentation
• consistent deployment across sites

This makes it well suited for environments moving toward structured power architecture.

Flexible Electrical Integration

M90S-2S supports simplified deployment using a factory-installed L14-30P input connection, enabling installation without hardwired infrastructure.

Configurable output options include:

• IEC C19
• NEMA 5-15R / 5-20R
• NEMA L6-20R / L6-30R
• NEMA L14-30R

This enables deployment in telecommunications rooms, electrical closets, commercial environments, and residential systems without requiring immediate electrical modification.

When to Use a 6kW Centralized UPS

M90S-2S is typically selected when:

• total load exceeds rack UPS capability
• multiple distributed UPS systems need to be consolidated
• centralized runtime planning is preferred
• infrastructure remains single-phase
• simple deployment without electrical upgrades is required

M90S-2S vs Traditional UPS Systems

Traditional UPS systems are fixed-capacity and require full replacement when capacity limits are reached.

M90S-2S provides a centralized modular platform with improved serviceability and simplified maintenance compared to distributed UPS deployments.

For scalable modular systems with capacity expansion and N+1 redundancy, see M90S-4S, M90S-6S, and M90S-12S platforms.

Replace APC / Eaton UPS Systems

M90S-2S is commonly deployed as a replacement for:

• multiple distributed UPS systems
• fixed-capacity single-phase UPS platforms
• entry-level centralized UPS deployments

It provides a simplified centralized architecture with improved serviceability and deployment consistency.

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

Typical Applications

M90S-2S is deployed in environments requiring centralized single-phase power protection, including:

• telecommunications infrastructure
• network distribution rooms (IDF/MDF)
• broadcast and media systems
• commercial infrastructure nodes
• industrial automation systems
• residential technology environments

Capacity Guidance

M90S-2S provides a fixed 6 kW centralized UPS platform.

It is typically deployed for:

• small centralized infrastructure loads
• aggregation of distributed UPS systems
• entry-level modular UPS architecture

Runtime is defined by modular battery configuration and continuity requirements.

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

M90S Modular Platform Options

The M90S platform includes multiple frame sizes:

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

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

Technical Summary

Topology: Online double conversion
Capacity: 6 kW
Voltage: 208/120V or 240/120V
Architecture: Modular (6 kW blocks)
Slots: 2
Redundancy: Not N+1 (entry configuration)
Battery: Modular expansion
Form Factor: Cabinet
Input: L14-30P

Plan With Confidence

Xtreme Power Conversion supports engineers, consultants, and infrastructure planners in designing centralized UPS systems for scalable infrastructure, simplified maintenance, and long-term continuity planning.

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