TX91L Isolation Online UPS – Extended Runtime Power Quality UPS (3.8–10kVA, 120/240V)

Isolation-based online UPS engineered for electrically challenging environments requiring both superior power quality and extended runtime. The Xtreme Power TX91L Series is designed for industrial, commercial, laboratory, and distributed infrastructure applications where electrical noise mitigation and long-duration outage protection must be delivered within a single platform.

Key Specifications

• 3.8 / 5 / 6 / 10 kVA
• 240/120V or 230/115V dual-voltage architecture
• Online double-conversion topology
• Integrated galvanic isolation transformer
• External battery architecture (no internal batteries)
• Programmable high-current charger (1–4 A)
• Static bypass and maintenance bypass
• Generator compatible
• Tower form factor
• 3-year electronics warranty (North America)

Datasheet:
https://xpcc.com/wp-content/uploads/TX91L-flyer.pdf

Learn more:
https://xpcc.com/isolation-ups-power-quality-guide/

Isolation + Extended Runtime UPS Architecture

TX91L defines the category of isolation-based UPS systems optimized for extended runtime deployment. Unlike internally battery-integrated UPS platforms, TX91L is designed around scalable external battery systems. This enables runtime to be engineered from minutes to multiple hours depending on application requirements.

The integrated isolation transformer provides galvanic separation between input and output, mitigating common-mode noise, grounding instability, harmonic distortion, and transient disturbances that can affect system reliability. This combined architecture allows both power quality stabilization and long-duration continuity within a single UPS platform.

Where TX91L Fits

TX91L operates as the extended-runtime isolation UPS platform within environments where both electrical noise and outage duration are critical design factors.

Within the Xtreme Power architecture:

• P91 → runtime-flexible rack UPS
• TX91 → isolation UPS for laboratory power quality
• TX91L → isolation UPS with extended runtime (this platform)
• J90 → high-density lithium rack UPS
• Li90 → facility-level lithium UPS

TX91L is typically deployed in facilities with unstable utility power, generator-backed infrastructure, and applications requiring multi-hour runtime protection.

Key Advantages of TX91L

TX91L is engineered for environments where both power quality and runtime duration must be addressed simultaneously.

• Integrated galvanic isolation transformer for electrical separation
• External battery architecture enabling scalable, multi-hour runtime
• Reduction of electrical noise and improved waveform integrity
• Stabilized ground reference for sensitive equipment
• Flexible battery sizing based on site requirements
• Generator-compatible for coordinated backup power systems

TX91L vs Conventional Online UPS Platforms

Standard online UPS systems provide continuous power conditioning but do not address electrical noise or extended runtime requirements at the same level. TX91L extends beyond conventional UPS functionality by combining isolation-based power conditioning with scalable external battery systems. This makes it suitable for environments where electrical instability and outage duration both impact system performance.

TX91L vs Internal Battery Isolation UPS (TX91)

TX91L and TX91 share the same isolation architecture but are optimized for different deployment strategies.

• TX91 → internal batteries, short-duration runtime, laboratory-focused applications
• TX91L → external batteries, extended runtime, infrastructure continuity applications

TX91L is selected when runtime requirements exceed internal battery capabilities or when large battery systems are required for facility-level continuity planning.

Replace Standard UPS in Challenging Electrical Environments

TX91L is commonly deployed to replace conventional UPS systems that do not provide sufficient isolation or runtime capability.

Typical upgrade scenarios include:

• Facilities requiring extended runtime beyond internal UPS limits
• Industrial environments with unstable or noisy electrical infrastructure
• Generator-backed systems requiring stabilization time
• Distributed commercial systems requiring multi-hour uptime

Explore comparisons:
https://xpcc.com/tx91-isolation-ups-competitive-comparisons/

Typical Applications

TX91L is deployed in environments where both electrical conditions and outage duration require engineered solutions. Common applications include industrial automation systems, retail and distributed commercial infrastructure, laboratory environments, medical diagnostic systems, broadcast and AV infrastructure, and facilities with unstable utility or generator-backed power.

Related applications:

• https://xpcc.com/ups-for-industrial-automation/
• https://xpcc.com/ups-for-harsh-environments/
• https://xpcc.com/ups-for-mass-spectrometers/

Capacity and Runtime Strategy

TX91L is designed for extended runtime deployment aligned with facility continuity planning.

Typical runtime objectives include maintaining operation during prolonged outages, supporting generator startup and stabilization, protecting sensitive systems during extended disruptions, and enabling multi-hour runtime strategies. Runtime is defined by external battery configuration and can be scaled to match site-specific requirements.

UPS sizing tool:
https://xpcc.com/ups-sizing-tool/

Power Infrastructure Context

Organizations deploying TX91L are typically addressing both power quality and continuity challenges within the same environment. This includes facilities with unstable utility power, electrically noisy infrastructure, generator-backed systems, and applications requiring extended runtime protection.

TX91L enables standardization of both isolation and runtime strategy across distributed or facility-level deployments.

TAA-Compliant Power Protection

TX91L supports regulated commercial, government, and industrial deployments requiring Trade Agreements Act compliance.

Learn more:
https://xpcc.com/taa-compliant-ups-single-phase/

Technical Summary

• Topology: Online double conversion
• Capacity: 3.8–10 kVA
• Voltage: 240/120V or 230/115V
• Battery: External battery architecture
• Isolation: Integrated transformer
• Form Factor: Tower
• Application: Extended runtime + power quality

Plan With Confidence

Xtreme Power Conversion supports engineers, facility planners, and system designers in deploying UPS systems that combine power quality stabilization with extended runtime continuity strategies.

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