Long-runtime power for 208–240V

The T91i is designed for environments where outages extend beyond typical UPS runtime expectations — light industrial applications, point of sale, servers, voice and data networks, and laboratories. Unlike rack UPS optimized for short-duration protection, it adds up to seven matching battery packs and programmable charging to support runtime to about four hours, keeping infrastructure operational during prolonged outages or until backup generation is available. Online double-conversion topology delivers a pure sine wave with zero transfer time, isolating connected equipment from voltage disturbances across global 208–240 V environments, and unity output power factor lets the T91i support up to 43% more critical load than a typical UPS of the same VA rating.

What the T91i delivers

The 208–240V long-runtime tower tier

The T91i is the long-runtime tower UPS for 208–240 V infrastructure — typically deployed floor-mounted or equipment-adjacent, across global commercial and industrial sites, wherever runtime requirements exceed rack-UPS capability. It is the 208–240 V counterpart to the 120 V T91.

Choose the T91i for 208–240 V long-runtime protection in a floor-standing tower; step down to the T91 for the same architecture at 120 V; choose the P91g when you need rack density with scalable runtime instead of a tower; or move to the J90i when lithium chemistry and a longer battery service life are the priority.

Tower runtime or rack density?

Rack UPS systems are typically optimized for density and short-duration runtime. The 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 at 208–240 V, the P91g provides scalable runtime in a rack chassis.

Replace legacy long-runtime UPS

The T91i is commonly deployed as a replacement for extended-runtime UPS platforms — APC Smart-UPS Online (208–240V tower configurations), Eaton 9PX / 9SX extended-runtime systems, and Vertiv Liebert GXT tower deployments — providing a simplified long-runtime architecture with scalable battery expansion and predictable deployment across global infrastructure.

T91i-3000 vs the Eaton 9SX at 3 kVA

The 9SX is the online double-conversion tower the T91i most directly replaces in 208–240 V deployments. Here they are at 3 kVA; the 2 kVA pairing follows the same pattern.

The T91i-3000 leads on usable watts (unity vs 0.9 PF — about 300 W more real power), a faster user-selectable charger, deeper runtime expansion (7 packs vs 4 EBMs), a smaller and lighter chassis, and standard TAA compliance; warranty is matched at 3 years. The 9SX brings Eaton’s ABM battery-management charging and a broad global service network. The T91i is also cross-shopped against APC Smart-UPS Online and Vertiv Liebert GXT. Eaton 9SX3000I figures are from published Eaton documentation; verify against current Eaton specifications for a quote.

Two models, 2000–3000 VA

Both models deliver unity output power factor (2000 / 3000 W) with selectable 200 / 220 / 230 / 240 V output and an 8 ft C19-to-L6-20P input cord. Internal battery is (6) 12V 9Ah; the matching external pack is the T91-BP72A (7.4 × 16.5 × 12.5 in, 82 lb), up to seven packs. Input range 110–300 VAC is load-dependent; capacities are based on the highest selectable output voltage.

Runtime by load and battery configuration

Estimated minutes at 50% and 100% load, from internal battery through seven external T91-BP72A packs. For the T91i-2000, 50% load is 1000 W and 100% is 2000 W; for the T91i-3000, 50% is 1500 W and 100% is 3000 W. Columns +1 through +7 are the number of external battery packs.

Estimated minutes; values vary with battery condition, age, cycles, and ambient temperature. Up to seven matching T91-BP72A packs; internal battery recharges to about 95% in three hours at a 2 A charge current. For longer runtimes or specific configurations, contact Xtreme Power engineering at (800) 582-4524 or sales@xpcc.com.

Built for global extended-outage continuity

The T91i is deployed across light industrial systems, point of sale and retail operations, servers and voice/data networks, laboratory equipment, and global commercial environments — particularly where extended runtime is required to maintain operations during prolonged outages.

Capacity guidance: 2000 VA for network infrastructure and laboratory equipment; 3000 VA for higher-load commercial and industrial systems.

T91i specifications

Documents and related links