Power quality and extended runtime in one isolation platform

The TX91L defines the category of isolation-based UPS systems optimized for extended-runtime deployment. It is built for facilities that must address two problems at once: electrical instability — noise, grounding issues, harmonic distortion, transients — and outage duration. The integrated isolation transformer conditions power at the source, while a scalable external battery architecture engineers runtime to the application, from ride-through and generator stabilization to multi-hour facility continuity. Standard online UPS platforms provide continuous conditioning but do not address electrical noise and extended runtime to the same degree within a single unit.

Runtime engineered to the site, not fixed to the chassis

The TX91L carries no internal batteries. Runtime is delivered entirely by external battery systems sized to the deployment, which is what lets a single platform span short ride-through and multi-hour continuity. A programmable 1–4 A charger (273 VDC, set from the LCD) is sized to recharge the larger battery strings that long-duration runtime depends on.

Because runtime is defined by external battery configuration, it is engineered per site. Contact Xtreme Power at (800) 582-4524 or sales@xpcc.com for runtime sizing, or use the UPS sizing tool.

Galvanic isolation that conditions power at the source

Unlike transformerless UPS platforms, the TX91L incorporates an integrated galvanic isolation transformer that electrically separates the utility input from connected loads — and provides power conditioning during both normal and bypass operation. This architecture mitigates the disturbances that degrade reliability in electrically challenging environments:

The result is improved waveform integrity and a stable ground reference — without the expensive dedicated circuits a non-isolated approach would require.

What the TX91L delivers

Same isolation, different runtime strategy

The TX91L and TX91 share the same isolation architecture but are optimized for different deployment strategies. Choose the TX91L when runtime requirements exceed internal-battery capabilities, or when large battery systems are needed for facility-level continuity planning. Choose the internal-battery TX91 for compact, self-contained, laboratory-focused power quality.

The extended-runtime isolation tier of the Xtreme Power family

The TX91L sits where electrical isolation and outage duration are both primary design requirements. It complements the runtime-flexible P91 rack platform and the internal-battery TX91, and pairs with lithium platforms for higher-density facility continuity.

Beyond IT-grade online UPS

Standard online UPS systems provide continuous power conditioning but do not address electrical noise or extended runtime at the same level. Transformerless platforms prioritize efficiency and compact size while providing no electrical isolation between input and output. The TX91L extends beyond conventional UPS functionality by combining isolation-based power conditioning with scalable external battery systems — suited to environments where electrical instability and outage duration both impact performance.

Four models, 3.8–10 kVA

All models are tower form factor with unity output power factor, ±1% regulation, an integrated isolation transformer, and a 273 VDC programmable charger (1–4 A, set at the LCD). Batteries are external. Input and output land on terminal blocks or an optional configurable PDU; an input L6-30P cord is available on the 3.8 / 5 / 6 kVA models (6 kVA capacity is reduced by a 30 A input circuit), while the 10 kVA lands on terminal blocks.

Where the TX91L is deployed

The TX91L is deployed where both electrical conditions and outage duration require engineered solutions — industrial automation systems, retail and distributed commercial infrastructure, laboratory and analytical environments, medical diagnostic systems, broadcast and AV infrastructure, and facilities with unstable utility or generator-backed power. It is commonly chosen to replace conventional UPS systems that lack sufficient isolation or runtime, and to standardize both isolation and runtime strategy across distributed or facility-level deployments.

TAA-compliant power protection

The TX91L supports regulated commercial, government, and industrial deployments requiring Trade Agreements Act compliance, alongside UL1778, cUL, FCC Class A, and RoHS.

TX91L specifications

Documents and related links