Rack-level power continuity for 208–240 V infrastructure

The P91g Li is deployed in distributed infrastructure where localized UPS protection is required at the rack level and where higher-voltage operation is standard. Online double-conversion topology provides zero transfer time and continuous conditioned power independent of upstream disturbances, while lithium architecture reduces battery replacement frequency, improves thermal tolerance versus VRLA, and lowers lifecycle service requirements.

What the P91g Li delivers

The standard 208–240 V lithium rack platform

The P91g Li defines the standard 208–240 V lithium rack UPS tier within the Xtreme Power distributed infrastructure strategy. It is typically deployed in conventional rack layouts with external power distribution, sitting between the short-depth J60Ci and the high-density J90i.

P91g Li or J90i?

The P91g Li is the standard 2U platform for 208–240 V environments — built for internal-battery ride-through with conventional rack deployment and power distribution. The J90i delivers the same online lithium protection in a 1U chassis (half the rack height) and adds individual outlet control, plus external battery pack support on its 2kVA and 3kVA models for runtime well beyond what internal batteries alone provide. Choose the J90i when rack space is at a premium, outlet-level switching is required, or runtime must extend past the P91g Li’s internal-only configuration; choose the P91g Li when a standard 2U platform with internal runtime is the better fit.

Three models, 1500–3000 VA

All models are 2U (3.5 in) high and 17.2 in wide. Rack depth is measured front bracket to unit panel; add 1 in for the front bezel. Output voltage is selectable (200 / 208 / 220 / 230 / 240 VAC); derate capacity to 80% at 200 or 208 VAC.

Internal battery runtime by load

Approximate runtimes in minutes by absolute load — UPS load is shown in VA (top of each column) and watts (bottom, at 0.9 power factor). Each model is characterized from 10% to 100% of its rated load. Internal batteries only; actual runtime varies with battery age, temperature, and load profile. The P91g Li uses an internal battery architecture for ride-through and controlled shutdown — for extended runtime, the 1U J90i adds external battery packs on its 2k and 3k models. Size it with the UPS selector →

Built for global distributed infrastructure

The P91g Li is deployed across network closets, AV systems, telecommunications infrastructure, and distributed IT in 208–240 V environments — particularly IDF/MDF deployments and multi-site global infrastructure where a consistent, maintainable UPS platform is required.

Capacity guidance: 1500 VA for network closets and distributed infrastructure; 2000 VA for IT racks and AV systems; 3000 VA for higher-density distributed environments.

P91g Li specifications

A 2-year warranty applies where ambient temperature exceeds 40°C (104°F) and is below 50°C (122°F). Confirm configuration-specific details on the datasheet.

Power distribution and maintenance bypass

The P91g Li is typically deployed with rack-mounted power distribution and external maintenance-bypass compatibility. An optional XPDU power-distribution unit and XBDM bypass module support standardized rack power architecture and let the UPS be serviced or replaced without interrupting the critical load.

Lifecycle advantages over VRLA

Lithium UPS systems provide lifecycle advantages over VRLA, including longer service intervals, improved thermal tolerance, and reduced maintenance intervention. The P91g Li’s LiFePO₄ architecture delivers up to 15-year battery design life – several times that of lead-acid – with faster recharge.

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