T91i Online UPS – Long-Runtime Tower UPS (2000–3000 VA, 208–240V)

The T91i 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, T91i supports runtime from short ride-through to multi-hour continuity while maintaining zero transfer time and stable output for sensitive loads.

Key Specifications

• 2000 / 3000 VA
• 208 / 220 / 230 / 240 VAC
• Online double-conversion topology
• Unity output power factor (1.0)
• Tower form factor
• External battery expansion
• Programmable charger (2–8 A)
• Optional SNMP / Modbus monitoring
• 3-year warranty (USA & Canada)
• TAA compliant

Datasheet:
https://xpcc.com/wp-content/uploads/T91i-flyer.pdf

Long-Runtime Power Architecture

T91i is designed for environments where outages extend beyond typical UPS runtime expectations.

Unlike rack UPS systems optimized for short-duration protection, it 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 disturbances and electrical instability.

Where T91i Fits in Power Architecture

T91i operates as the long-runtime tower UPS platform for 208–240V infrastructure within distributed environments.

It is typically deployed:

• in floor-mounted or equipment-adjacent installations
• across global commercial and industrial sites
• in environments requiring extended runtime beyond rack UPS capability

Within the Xtreme Power architecture:

• P80g → efficient rack UPS
• P91g → rack UPS with scalable runtime
• T91i → long-runtime tower UPS (this platform)
• J90i → high-density lithium UPS

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

T91i vs Rack UPS Platforms

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

T91i 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/p91g/

Replace APC / Eaton Long-Runtime UPS

T91i is commonly deployed as a replacement for extended runtime UPS platforms including:

• APC Smart-UPS Online (208–240V tower configurations)
• Eaton 9PX / 9SX extended runtime systems
• Vertiv Liebert GXT tower deployments

It provides a simplified long-runtime architecture with scalable battery expansion and predictable deployment across global infrastructure.

Explore comparisons:
https://xpcc.com/t91i-online-ups-competitive-comparisons/

Runtime Architecture and Deployment Flexibility

External battery expansion enables T91i to support runtime from minutes to multiple hours depending on load and configuration.

The programmable charger supports larger battery banks and reduces recharge time following extended outages, making it suitable for environments requiring reliable long-duration continuity.

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

Typical Applications

T91i is deployed across hospitality systems, retail operations, laboratory equipment, network infrastructure, light industrial systems, and global commercial environments.

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:

• 2000 VA → network infrastructure, laboratory equipment
• 3000 VA → higher-load commercial and industrial systems

Runtime is defined by battery configuration and continuity requirements.

Lower Voltage Option

For installations requiring 120V output, see the lower-voltage version of this platform:

T91 Online UPS
https://xpcc.com/products/t91/

Xtreme Power UPS Platform Context

T91i serves as the long-runtime platform within the global UPS architecture:

• P80g → line-interactive rack UPS
• P91g → rack UPS with runtime scaling
• T91i → extended runtime tower UPS
• J90i → lithium high-density UPS
• Li90 → facility-level UPS

Technical Summary

Topology: Online double conversion
Capacity: 2000–3000 VA
Voltage: 208–240V
Battery: External expansion
Form Factor: Tower
Runtime: Scalable (multi-hour capable)
Monitoring: Optional SNMP / Modbus
Compliance: CE, RoHS, TAA
Warranty: 3 years (USA & Canada)

Plan With Confidence

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

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