Online Lithium UPS Family Comparison for Rack and Edge Deployments
Both the Xtreme Power P91 Li and the Xtreme Power J90 from Xtreme Power Conversion are online double conversion UPS systems built on lithium iron phosphate battery technology. Each platform is designed to protect critical IT, network, and edge infrastructure, but they are optimized for different deployment priorities.
The P91 Li is a 2U rack or tower UPS focused on longer internal runtime and traditional IT deployments. The J90 is a 1U rackmount UPS engineered for space constrained edge environments and includes optional Web or SNMP controlled outlet level switching for remote power management.
This comparison helps clarify where each platform fits best within the Xtreme Power lithium UPS portfolio.
Learn more about the Xtreme Power J90
https://xpcc.com/products/j90/
Learn more about the Xtreme Power P91 Li
https://xpcc.com/products/p91li-1-3kVA
Key Differences at a Glance
- Both platforms use lithium iron phosphate batteries with integrated battery management
- P91 Li provides longer internal runtime in a 2U rack or tower form factor
- J90 delivers a compact 1U footprint for space constrained racks
- J90 supports remote outlet level control with optional Web or SNMP
- J90 is rated for higher ambient temperature operation
- Both platforms are TAA compliant and backed by a 6 year warranty
Xtreme Power Lithium UPS Family Comparison
| Feature | Xtreme Power P91 Li | Xtreme Power J90 | Positioning Insight |
| Battery Technology | Lithium Iron Phosphate with integrated BMS | Lithium Iron Phosphate with integrated BMS | Both use long life LFP chemistry with improved safety and cycle life |
| Available Capacities | 1500VA / 1350W 2000VA / 1800W 3000VA / 2700W |
1000VA / 900W 1500VA / 1350W 2000VA / 1800W 3000VA / 2700W |
J90 offers a broader range including 1kVA options |
| Form Factor | 2U rack or tower | 1U rackmount | J90 maximizes rack density |
| Individually Controllable Receptacles | Not available | 4 controllable outlets with optional Web or SNMP | J90 enables remote reboot and load control |
| High Temperature Operation | Up to 40 °C (104 °F) | Up to 50 °C (122 °F) | J90 better suited for hot edge environments |
| Battery Runtime at Full Load | Approximately 8 to 14 minutes internal | 4 to 7 minutes internal | P91 Li favors internal runtime while J90 supports external battery expansion |
| Extended Runtime Options | Internal batteries only | External battery packs supported on 2000VA and 3000VA models | J90 provides greater runtime scalability |
| TAA Compliance | Yes | Yes | Both qualify for federal and regulated procurement |
| Warranty | 6 year UPS and battery | 6 year UPS and battery | Equivalent long term coverage |
When the P91 Li Is the Better Fit
- Traditional IT environments needing longer internal runtime
- Applications where tower mounting flexibility is required
- Sites with adequate rack space and controlled temperatures
- Deployments prioritizing simplicity over outlet level control
When the J90 Is the Better Fit
- Edge, network, and AV racks where space is limited
- Deployments requiring remote outlet level control
- Higher ambient temperature environments
- Distributed or unattended sites
- Installations that may require external battery expansion
Choosing the Right Xtreme Power Lithium UPS
Both the P91 Li and the J90 deliver reliable online power protection using lithium iron phosphate batteries. The right choice depends on rack space, runtime strategy, thermal conditions, and the need for remote power control.
Xtreme Power application engineers can help match the correct platform to your deployment requirements.
Compare J90 to Other UPS Alternatives
Evaluating J90 alongside other competitive platforms?
View all J90 UPS comparisons
https://xpcc.com/j90-ups-comparisons/
Plan with Confidence
Xtreme Power supports early specification, design in, and lifecycle planning for edge IT, networking, AV, and regulated environments.
(800) 582-4524
sales@xpcc.com