P91Li Lithium UPS – Online Double-Conversion with 15 Year Battery Life
1500VA-3000VA
120VAC
Reliable power protection for schools, AV systems, retail POS, and network infrastructure. Features long-life lithium Iron Phosphate (LFP) batteries rated up to 15 years, and 6-year warranty.
Overview
The Xtreme Power P91Li UPS delivers true online double-conversion protection with the extended performance of lithium iron phosphate (LiFePO₄) batteries. Designed for IT racks, AV systems, schools, media production, and hospitality installations, the P91Li provides up to 15 years of battery life, high-temperature performance, and compact rack/tower flexibility—significantly reducing maintenance and total cost of ownership compared to VRLA UPS systems.
Available in 1.5kVA, 2kVA, and 3kVA models—with a short-depth 1000VA model coming soon—the P91Li offers long internal runtimes without external battery packs, making it ideal for space-constrained installations.
Key Features & Benefits
- Long-Life Lithium Batteries – Up to 15-year design life and 3,000–5,000 cycles, delivering 3× longer service life than lead-acid
- Temperature Resilient – Operates up to 50°C (122°F) with capacity derating above 40°C (104°F)
- Online Double-Conversion Protection – Ensures continuous, isolated, clean power for sensitive electronics
- Compact Rack/Tower Design – Flexible 2U form factor installs easily in standard IT racks or tower orientation
- Excellent Internal Runtime – Extended backup time without bulky, external battery cabinets
- Lightweight & Space Efficient – Smaller and lighter than comparable lead-acid UPS systems
- Remote Monitoring & Control – Optional SNMP/web card enables network monitoring, alarms, and remote on/off output control
- 6-Year Standard Warranty – Covers UPS electronics and lithium batteries (USA & Canada). Warranty is reduced to 2 years when installed in environments above 40°C (104°F) up to 50°C (122°F).
- TAA-Compliant – Approved for U.S. government and public sector use
Product Snapshot
| Feature | Specification |
| Capacities | 1500 VA, 2000 VA, 3000 VA (1000 VA short-depth model coming soon) |
| Topology | Online double-conversion |
| Form Factor | 2U rack/tower convertible |
| Battery Type | Lithium iron phosphate (LiFePO₄) |
| Battery Life | Up to 15 years / 3,000–5,000 cycles |
| Runtime | Long internal runtimes (non-scalable) |
| Temperature | Up to 50°C (derating above 40°C) |
| Warranty | 5 years (electronics & batteries; USA & Canada) |
Applications
The P91Li UPS is ideal for industries and applications demanding long-life, compact, and resilient backup power:
- Pro AV / Video Walls – Power AV racks and displays without bulky batteries. See UPS for Pro AV and UPS for Video Walls.
- Home Automation / CEDIA – Keep smart home control systems and theaters online. See UPS for Home Automation.
- Schools & Education – Protect classrooms, labs, and IT closets with long-life batteries. See UPS for Schools.
- VoIP & Networking – Ensure communication continuity. See UPS for VoIP Phone Systems.
- Hospitality & Media – Protect guest technology, production studios, and broadcast control rooms. See Hospitality UPS Systems and UPS for Media Broadcast.
Competitive Comparisons
See how the P91Li UPS stacks up against leading lithium UPS models:
- Xtreme P91-Li vs APC Schneider Easy UPS Online Lithium-ion SRVSL RT
- Xtreme P91-1.5KLi – Eaton 9PX1500RT-L
- Xtreme P91-2kLi – Eaton 9PX2000RT-L
- Xtreme P91-3kLi – Eaton 9PX3000RT-L
- Xtreme P91-1.5KLi – Vertiv GXT5LI-1500LVRT2UXL
- Xtreme P91-2kLi – Vertiv GXT5Li-2000LVRT2UXL
- Xtreme P91-2kLi – Schneider APC SMTL2200RM2UCNC
- Xtreme P91-2kLi – Schneider APC SMTL2K2RM2UCLNC
- Xtreme P91-3kLi – Vertiv Liebert GXT5Li-3000LVRT2UXL
Customer Favorite: The P91-2kLi Lithium UPS is one of the most popular models thanks to its long internal runtime and compact design.
Related Products
- J90 UPS – 1U lithium UPS with high-temp operation and switching receptacles
- J60 UPS – Ultra-compact lithium UPS with 15-year battery life
- J60C UPS – Short-depth lithium UPS for shallow racks
- P91 1–3 kVA UPS – Online double-conversion UPS with VRLA batteries
Contact Us Today!
The P91Li UPS combines lithium-ion technology, online double-conversion, and flexible rack/tower deployment — with runtimes and battery life far beyond VRLA systems.
Contact Us | View All Products
(800) 582-4524
| 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 | |||