P91g Li Lithium Rack UPS – Online Double-Conversion (1500–3000 VA, 208–240V)
1500–3000 VA | 208–240 V | Online Double Conversion
Lithium rack UPS with online double-conversion topology for distributed IT, network closet, AV, and edge infrastructure. LiFePO₄ batteries deliver long lifecycle performance and high-temperature operation up to 50 °C.
Lithium rack UPS designed for global 208–240 V infrastructure environments requiring conditioned power continuity, thermal resilience, and flexible deployment.
The P91g Li provides reliable online double-conversion protection for distributed IT, telecommunications, AV systems, and commercial infrastructure where standard rack form factors and higher-voltage operation are required.
Integrated Lithium Iron Phosphate (LiFePO₄) battery architecture supports long service life, reduced maintenance, and stable performance in elevated temperature environments compared to traditional VRLA UPS systems.
Key Specifications
- 1500 / 2000 / 3000 VA
- 208 / 220 / 230 / 240 V Single Phase
- Online Double Conversion
- Lithium Iron Phosphate (LiFePO₄)
- Rack / Tower / Wall Deployment
- Up to 50 °C Operation (derating above 40 °C)
- Internal Battery Runtime Architecture
- 6-Year Warranty (U.S. & Canada; reduced coverage above 40 °C)
P91g Li Datasheet (PDF)
https://xpcc.com/wp-content/uploads/P91g-1.5-3kVA-Li-Flyer.pdf
Rack-Level Power Continuity and Lithium Architecture
The P91g Li is deployed in distributed infrastructure environments 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.
Lithium UPS architecture enables:
- reduced battery replacement frequency
- improved performance in elevated temperature environments
- lower lifecycle service requirements
Learn more:
https://xpcc.com/lithium-ups-guide/
https://xpcc.com/rack-power-architecture/
Where P91g Li Fits in Rack Power Architecture
P91g Li operates as a standard rack-level UPS platform for higher-voltage distributed infrastructure environments.
It is typically deployed in systems using conventional rack layouts and external power distribution architectures.
P91g Li vs High-Density Lithium Rack UPS Platforms
The P91g Li is designed for infrastructure environments where standard rack deployment, internal runtime, and conventional power distribution approaches are sufficient in 208–240 V environments.
Compared to high-density lithium UPS platforms such as the J90i, P91g Li provides:
- Standard rack deployment architecture
Suitable for typical rack environments without strict space constraints - Internal runtime design
Optimized for ride-through and controlled shutdown strategies - Flexible installation formats
Supports rack, tower, or wall-mounted deployments
In contrast, high-density platforms such as J90i are selected when rack space constraints, outlet-level switching, or extended runtime lithium architectures are required.
Lithium UPS Architecture and Lifecycle
Lithium UPS systems are widely deployed in global infrastructure due to lifecycle and performance advantages.
Compared to VRLA systems, lithium platforms support:
- longer service intervals
- improved thermal tolerance
- reduced maintenance intervention
Learn more:
https://xpcc.com/lithium-ups-vs-lead-acid-ups/
High-Temperature Deployment Capability
The P91g Li platform is designed for operation in elevated ambient environments up to 50 °C, supporting deployments where traditional UPS systems may require additional environmental control.
This enables:
- reduced cooling infrastructure dependency
- improved deployment flexibility in non-conditioned environments
- consistent performance in global installations
Learn more:
https://xpcc.com/high-temperature-ups/
Key Engineering Characteristics
Online double-conversion topology with zero transfer time
Lithium Iron Phosphate (LiFePO₄) battery architecture
Up to 15-year battery design life under ideal conditions
Operating temperature up to 50 °C (output derating above 40 °C)
Rack / tower / wall deployment flexibility
Optional SNMP / web-based monitoring
External maintenance bypass compatibility
Designed for standardized distributed UPS deployments
CE and RoHS compliance
Standard lithium battery warranty: 6 years (U.S. & Canada); reduced coverage above 40 °C
Capacity and Runtime Strategy
The P91g Li platform is optimized for short-to-medium duration runtime requirements typical of distributed IT and edge infrastructure.
1500 VA — network closets and distributed infrastructure
2000 VA — IT racks and AV systems
3000 VA — higher-density distributed environments
Runtime strategy is typically defined based on ride-through requirements or controlled shutdown planning.
Competitive Evaluation
For detailed model-level comparisons and competitive positioning:
P91g Li Competitive Comparisons
https://xpcc.com/p91-li-ups-comparisons/
Product Resources
- P91g Li Datasheet (PDF)
https://xpcc.com/wp-content/uploads/P91g-1.5-3kVA-Li-Flyer.pdf - P91g Li Competitive Comparisons
https://xpcc.com/p91-li-ups-comparisons/ - UPS Selector (Sizing Tool)
https://xpcc.com/selector
Xtreme Power Lithium Rack Infrastructure Portfolio
The P91g Li platform defines the standard 208–240 V lithium rack UPS tier within the Xtreme Power distributed infrastructure strategy.
J60Ci Short-Depth Lithium Rack UPS
Shallow cabinet and wall-mount deployments (230 V)
https://xpcc.com/products/j60c/
J90i High-Density Lithium Rack UPS
1U architecture with switching and extended runtime capability
https://xpcc.com/products/j90i/
Infrastructure Planning Resources
Lithium UPS Technology Guide
https://xpcc.com/lithium-ups-guide/
Rack Power Architecture
https://xpcc.com/rack-power-architecture/
Lithium vs Lead-Acid Lifecycle
https://xpcc.com/lithium-ups-vs-lead-acid-ups/
UPS for IDF / MDF Closets
https://xpcc.com/ups-for-idf-mdf-closets/
UPS for Industrial Automation
https://xpcc.com/ups-for-industrial-automation/
Technical Summary
Topology: Online Double Conversion
Capacity: 1500 / 2000 / 3000 VA
Input / Output Voltage: 208 / 220 / 230 / 240 V
Output Power Factor: Unity (1.0)
Battery Chemistry: Lithium Iron Phosphate (LiFePO₄)
Battery Design Life: Up to 15 years under ideal conditions
Operating Temperature: Up to 50 °C (derating above 40 °C)
Form Factor: Rack / Tower / Wall
Runtime: Internal battery architecture
Monitoring: Optional SNMP / Web-based management
Compliance: CE, RoHS
Warranty: 6 years (U.S. & Canada); reduced coverage above 40 °C
Plan With Confidence
Xtreme Power Conversion supports consultants, facility engineers, and system integrators with lithium UPS deployment strategy, distributed infrastructure planning, and lifecycle modernization.
Phone: (800) 582-4524
Email: sales@xpcc.com
| MODEL NUMBER | P91g-1.5kLi | P91g-2kLi | P91g-3kLi | |
| CAPACITY | Power rating | 1500VA (1350W) | 2000VA (1800W) | 3000VA (2700W) |
| INPUT | Voltage/frequency | 110-300 VAC* / 50/60Hz auto-sensing | ||
| OUTPUT | Voltage | 200**/208**/220/230/240 Vac selectable | ||
| Waveform | <=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 | 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 | 1/2/4/6/8A (max.), 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 in (437 x 384 x 89 mm) |
17.2 x 19 x 3.5 in (437 x 482 x 89 mm) |
17.2 x 23.8 x 3.5 in (437 x 605 x 89 mm) |
| Weight | 25.6 lbs (11.5 kg) | 33.5 lbs (15 kg) | 45.2 lbs (20.5 kg) | |
| Line cord | C14 inlet, 8 ft (2.4 m) L6-20P to C13 line cord |
C20 inlet, 8 ft (2.4 m) L6-20P to C19 line cord | ||
| Receptacles | (8) IEC C13 | (1) IEC C19 + (8) IEC C13 | ||
| ENVIRONMENT | Operating temperature | 32–104°F (0–40°C) | ||
| Altitude | 11,500 ft (3505 m) above sea level | |||
| APPROVALS | CE, RoHS, 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 | |||
