P91Li UPS – Rack/Tower Lithium-Ion Online UPS with Up to 15-Year Battery Life
1000VA / 1500VA / 2000VA / 3000VA
120VAC
Flexible rack/tower lithium online UPS for IT, edge, retail, AV, and networking environments with long-life LiFePO₄ batteries, advanced management options, and high-temperature capability up to 50 °C.
1000 VA – 3000 VA | 120 VAC | Online Double Conversion | High Temperature Operation
The Xtreme Power P91Li is a compact high performance 120 V online double conversion lithium UPS designed for distributed IT, edge, retail, AV, and enterprise environments where uptime, thermal resilience, and long battery life are essential. It delivers continuous conditioned AC power with zero transfer time to protect servers, network infrastructure, and other sensitive electronics.
Powered by Lithium Iron Phosphate (LiFePO₄) batteries, the P91Li is designed for up to 15 years of calendar life or 3,000 to 5,000 charge discharge cycles under ideal operating conditions, significantly extending service life compared to traditional lead acid UPS systems. The platform supports ambient operation up to 50 °C (122 °F); output derating applies above 40 °C (104 °F) to maintain reliability and thermal margins.
Its rack tower convertible design and optimized internal lithium runtime make the P91Li well suited for modern IT infrastructures requiring efficient power protection in space constrained environments.
Battery Runtime
The P91Li provides optimized internal lithium runtime for short to medium duration backup typical of network closets, edge infrastructure, AV racks, and distributed IT deployments.
Need Extended Runtime?
For lithium UPS applications requiring scalable or long duration runtime at 120 V, see the J90 Series, which supports external battery packs and extended runtime configurations.
J90 Lithium UPS → https://xpcc.com/products/j90/
Key Features & Benefits
Online Double Conversion UPS
Provides continuous conditioned AC power with zero transfer time for mission critical loads.
Rack Tower Convertible Design
Deploys as a rackmount or freestanding tower to adapt to evolving infrastructure needs.
Learn more: https://xpcc.com/rack-mount-ups/
Wall Mountable Design
All P91Li models support wall mount installation, enabling flexible deployment in telecom closets, AV cabinets, and space constrained infrastructure environments.
Learn more: https://xpcc.com/wall-mount-ups/
High Temperature Operation
Designed for reliable operation up to 50 °C (122 °F); output derating applies above 40 °C (104 °F).
Learn more: https://www.xpcc.com/high-temperature-ups/
Long Life LiFePO₄ Battery
Designed for up to 15 years or 3,000 to 5,000 cycles under ideal operating conditions, delivering significantly longer service life than VRLA batteries.
Learn more: https://xpcc.com/ups-battery-technologies/
Remote Monitoring & Control
Optional Web SNMP management cards enable remote monitoring, alerts, and control.
TAA Compliant Design
Approved for U.S. federal, public sector, and regulated deployments.
Learn more: https://xpcc.com/taa-compliant-ups-single-phase/
6 Year Warranty
Covers UPS electronics and lithium batteries in the U.S. and Canada; reduced coverage at elevated temperatures.
Power Distribution & Outlet Control
For installations requiring remote outlet switching, sequencing, or per device monitoring, the P91Li can be paired with the SPDU Smart Power Distribution Unit. This adds individually controlled and metered outlets to the protected UPS output, enabling remote reboot and power management for rack, AV, and distributed IT environments.
SPDU Smart PDU → https://xpcc.com/products/spdu/
Product Snapshot
| Feature | Specification |
| Capacities | 1000VA / 900W, 1500VA / 1350W, 2000VA / 1800W, 3000VA / 2700W |
| Input Output Voltage | 120 VAC |
| Topology | Online double conversion |
| Form Factor | Rackmount Tower convertible |
| Rack Depth | 11.6 inches (1000VA model) |
| Battery Type | Lithium Iron Phosphate LiFePO₄ |
| Battery Life | Up to 15 years or 3,000 to 5,000 cycles ideal operating conditions |
| Operating Temperature | Up to 50 °C 122 °F |
| Temperature Derating | Output derating applies above 40 °C 104 °F |
| Management | Optional Web SNMP cards |
| Compliance | TAA Compliant UL RoHS |
| Warranty | 6 years U.S. and Canada |
Short Depth 1000VA model available August 2026
https://xpcc.com/short-depth-rackmount-ups/
Derating is application dependent; consult specifications for allowable load vs temperature.
Applications
The P91Li UPS is ideal for environments requiring resilient 120 V power protection with compact lithium architecture:
IT and Network Closets Protect servers, storage, and infrastructure in IDF and MDF environments.
https://xpcc.com/ups-for-idf-mdf-closets/
Networking and Automation Backup for switches, routers, control systems, and smart building infrastructure.
https://xpcc.com/ups-for-home-automation-cedia/
Pro AV and Digital Signage Power continuity for AV racks and media systems.
https://xpcc.com/ups-for-pro-av/
Retail and Hospitality Reliable power for POS, kiosks, and edge infrastructure in restaurants and retail environments.
https://xpcc.com/ups-for-restaurants-retail/
Education and Commercial Facilities Backup for classrooms, labs, and distributed building systems.
https://xpcc.com/ups-for-schools/
Edge and Distributed IT Reliable power for remote and unattended installations.
Compare the P91Li to Other UPS Platforms
Evaluate the P91Li against competitive and internal UPS platforms by topology, runtime, battery life, and total cost of ownership.
View all P91 UPS comparisons
https://xpcc.com/p91-li-ups-comparisons
Contact Us
The Xtreme Power P91Li UPS combines online double conversion protection, compact rack tower flexibility, long life LiFePO₄ batteries designed for up to 15 years or 3,000 to 5,000 cycles, clearly defined high temperature derating, expandable outlet level control, and short depth deployment options delivering dependable 120 V power protection for modern IT and edge environments.
Contact Us | View All Products | UPS Selector
(800) 582-4524
sales@xpcc.com
| MODEL NUMBER | P91-1.5kLi | P91-2kLi | P91-3kLi | |
| CAPACITY | Power rating | 1500VA (1350W) | 2000VA (1800W) | 3000VA (2700W) |
| INPUT | Voltage/frequency | 55–150VAC* / 50/60Hz auto-sensing | ||
| OUTPUT | Voltage | 100**/110/115/120/127 VAC selectable | ||
| Waveform | Pure sine wave: <=2% THD (linear load), <=4% THD (non-linear load | |||
| Frequency | 50/60Hz ± 0.1Hz | |||
| Efficiency | Up to 98% ECO mode or 94% online mode | |||
| Overload capacity | Online mode: 110% & ≤ 130% for 5 min; > 130% & ≤140% for 30 sec; >140% for 1.5 sec | |||
| BATTERY | Cell type | LFP26650 2600 mAh | ||
| Cell configuration | 15S2P | 15S2P x2 | 24S1P x 3 | |
| Charger voltage | 52.5VDC | 84VDC | ||
| Charger current | 2/4/6/8A (4A default), adjustable through LCD | |||
| Recharge time | 1.5 hours to 90% charge | |||
| PHYSICAL | Dimensions (W x D x H)*** | 17.2 x 15.1 x 3.5 | 17.2 x 19 x 3.5 | 17.2 x 23.8 x 3.5 |
| Weight (lbs) | 25.6 | 33.5 | 45.2 | |
| Line cord | 6 ft, 5–15P | 6 ft, 5–20P | 6 ft, L5–30P | |
| Receptacles | (8) NEMA 5-15R | (8) NEMA 5–15/20R | L5–30R+(6)5–15/20R | |
| ENVIRONMENT | Operating temperature | 32–104°F (0–40°C) | ||
| Altitude | 11,500 ft above sea level | |||
| APPROVALS | UL, cUL, RoHS, FCC Class A, battery packs comply to UL1973, UN38.3, TAA compliant | |||
| WARRANTY | 6 years electronics, 6 years battery warranty (USA and Canada) | |||
| COMMUNICATIONS INTERFACE | RS-232, USB, EPO, intelligent slot for optional cards (Web/SNMP, Relay/dry contact, Modbus) | |||
| INCLUDED IN BOX | ViewPower software, front brackets, tower pedestals, user manual | |||
| AVAILABLE OPTIONS | Bypass distribution (XBDM), power distribution (XPDU), 4-post rail kit, 2-post shelf kit, wall mount bracket | |||
