M90C-6S Modular UPS (5–24 kW) | Rack-Mounted 3-Phase UPS System

The M90C-6S is a modular three-phase UPS platform engineered for environments where power requirements exceed traditional rack UPS systems but do not justify full facility-level infrastructure.

Built on a 6-slot architecture using 5 kW and 8 kW power modules, the system scales from 5 kW to 24 kW within a single rack footprint. This enables phased deployment, redundancy, and runtime expansion while maintaining a centralized three-phase architecture at the rack level.

M90C-6S defines the category of rack-integrated three-phase modular UPS systems.

Key Specifications

• 5–24 kW capacity
• 208/120V three-phase
• Online double-conversion topology
• Modular 5 kW / 8 kW power modules
• 6-slot architecture (power or battery)
• N+1 redundancy capable
• Rack-mounted design
• TAA compliant

Datasheet:
https://xpcc.com/wp-content/uploads/M90C-6S-flyer.pdf

Where M90C-6S Fits

M90C-6S bridges the gap between:

• Single-phase rack UPS systems (J90, P91)
• Facility-level UPS platforms (M90U, Li90)

It is selected when:

• Three-phase power is required inside the rack
• Infrastructure is scaling beyond 3 kVA rack UPS
• Redundancy is required without multiple distributed UPS units
• A clear upgrade path to larger modular systems is needed

This architecture allows centralized protection while maintaining rack-level deployment flexibility.

Scalable Modular Architecture

Capacity and redundancy are configured within the same system:

• Add power modules to increase capacity
• Configure N+1 for redundancy
• Add battery modules for runtime expansion

This reduces overprovisioning and aligns UPS capacity with actual load growth.

For system design strategy:
https://xpcc.com/rack-power-architecture/

Key Advantages

• Scalable from 5 kW to 24 kW in one system
• True three-phase UPS inside a rack footprint
• N+1 redundancy without external systems
• Modular battery and runtime expansion
• Flexible electrical configuration
• TAA compliant for federal and regulated environments

Rack Deployment and Installation

M90C-6S is designed for standard equipment racks with front service access and modular components for simplified maintenance.

Rack mounting demonstration:
https://www.youtube.com/shorts/lsok0-_uHAg

Flexible Electrical Integration

Supports both:

• Corded input (≤ 8 kW deployments)
• Hardwired input (larger systems)

Output options include receptacles or hardwired connections, allowing deployment across retrofit and standardized environments.

M90C-6S vs Traditional Three-Phase UPS

Traditional systems are:

• Fixed capacity
• Floor-standing
• Difficult to scale

M90C-6S enables:

• Incremental capacity growth
• Rack-based deployment
• Integrated redundancy
• Simplified long-term expansion

Modernization and Replacement

M90C-6S is commonly deployed to replace:

• Eaton BladeUPS
• Legacy modular UPS platforms

It modernizes infrastructure by transitioning to a scalable, rack-integrated architecture with improved serviceability and flexibility.

BladeUPS replacement strategy:
https://xpcc.com/eaton-bladeups-replacement/

Detailed comparisons:
https://xpcc.com/m90c-6s-ups-comparisons/

Typical Applications

• Federal and government IT infrastructure
• Healthcare systems
• Edge compute and micro data centers
• Industrial automation
• Secure network environments

Capacity Guidance

• 5–8 kW → initial deployment
• 10–16 kW → growing infrastructure
• 18–24 kW → fully populated system
• N+1 → redundancy configuration

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

Platform Context

• M90C-2S → smaller deployments up to 8 kW
• M90C-6S → scalable rack-integrated three-phase system
• M90U / Li90 → facility-level expansion

Full platform overview:
https://xpcc.com/xtreme-power-m90c-modular-ups-systems/

Technical Summary

• Topology: Online double conversion
• Capacity: 5–24 kW
• Voltage: 208/120V three-phase
• Architecture: Modular (5 kW / 8 kW)
• Slots: 6
• Redundancy: N+1 capable
• Battery: Modular expansion
• Form Factor: Rack-mounted
• Input: Corded (≤ 8 kW) or hardwired

Plan With Confidence

Xtreme Power Conversion supports engineers, consultants, and infrastructure teams in designing modular UPS systems for scalable capacity, redundancy, and modernization.

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