T91 Online UPS – Long-Runtime Tower UPS (1000–3000 VA, 120V)

The T91 Series is an online double-conversion UPS designed for applications where extended runtime is required beyond the limits of compact rack UPS systems.

With external battery expansion and a high-capacity programmable charger, T91 supports runtime from short ride-through to multi-hour continuity while maintaining zero transfer time and stable output for sensitive loads.

Key Specifications

• 1000 / 1500 / 2000 / 3000 VA
• 120V single phase
• Online double-conversion topology
• Unity output power factor (1.0)
• Tower form factor
• External battery expansion
• Programmable charger (2–8 A)
• Optional SNMP / network monitoring
• TAA compliant

Datasheet:
https://xpcc.com/wp-content/uploads/T91-flyer.pdf

Long-Runtime Power Architecture

T91 is designed for environments where outages extend beyond typical UPS runtime expectations.

Unlike rack UPS systems optimized for short-duration protection, T91 uses external battery systems and programmable charging to support multi-hour runtime requirements. This allows infrastructure to remain operational during extended outages or until backup generation is available.

Online double-conversion topology ensures continuous conditioned power, isolating connected equipment from voltage fluctuations and electrical disturbances.

Where T91 Fits in Power Architecture

T91 operates as the long-runtime tower UPS platform within distributed infrastructure.

It is typically deployed:

• in floor-mounted or equipment-adjacent installations
• in retail, hospitality, and medical environments
• where runtime requirements exceed rack UPS capabilities

Within the Xtreme Power architecture:

• P80 → efficient rack UPS
• P91 → rack UPS with scalable runtime
• T91 → long-runtime tower UPS (this platform)
• J90 → high-density lithium rack UPS

T91 vs Rack UPS Platforms

Rack UPS systems are typically optimized for density and short-duration runtime.

T91 is designed for applications where runtime is the primary requirement. Its tower form factor supports larger battery systems and higher charging capacity, enabling significantly longer backup durations.

For rack-based runtime solutions, see:
https://xpcc.com/products/p91_1-3/

Replace APC / Eaton Long-Runtime UPS

T91 is commonly deployed as a replacement for tower-based and extended runtime UPS platforms including:

• APC Smart-UPS SRT tower configurations with external battery packs
• Eaton 9PX / 9SX extended runtime systems
• Vertiv Liebert GXT tower deployments

It provides a simplified long-runtime architecture with programmable charging and scalable battery expansion for consistent deployment across multiple sites.

Explore comparisons:
https://xpcc.com/t91-online-ups-competitive-comparisons/

Runtime Architecture and Deployment Flexibility

T91 is designed to support a wide range of runtime strategies.

External battery expansion enables runtime from minutes to multiple hours, depending on load and battery configuration. The programmable charger supports larger battery banks and reduces recharge time after extended outages.

Typical use cases include refrigeration protection, retail continuity, network uptime, and healthcare-related runtime requirements.

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

Typical Applications

T91 is deployed across commercial and regulated environments including retail and restaurant operations, hospitality systems, medical refrigeration, network infrastructure, and government installations.

It is particularly well suited for distributed sites where extended runtime is required to maintain operations during prolonged outages.

Capacity Guidance

Capacity selection is based on load and runtime objectives:

• 1000 VA → small systems and POS equipment
• 1500–2000 VA → retail, network, and control systems
• 3000 VA → higher-load commercial infrastructure

Runtime is defined by battery configuration and continuity requirements, with extended runtime capability up to multi-hour operation.

Higher Voltage Option

For installations requiring 208–240V output, see the higher-voltage version of this platform:

T91i Online UPS
https://xpcc.com/products/t91i-online-ups/

Xtreme Power UPS Platform Context

T91 serves as the long-runtime platform within the broader UPS architecture:

• P80 → line-interactive rack UPS
• P91 → rack UPS with scalable runtime
• T91 → extended runtime tower UPS
• J90 → lithium rack UPS
• Li90 → facility-level lithium UPS

Technical Summary

Topology: Online double conversion
Capacity: 1000–3000 VA
Voltage: 120V
Battery: External expansion
Form Factor: Tower
Runtime: Scalable (up to multi-hour)
Monitoring: Optional SNMP / web
Compliance: UL, cUL, RoHS, TAA

Plan With Confidence

Xtreme Power Conversion supports engineers and infrastructure planners in designing long-runtime UPS systems for commercial continuity, extended outage protection, and distributed deployment strategies.

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