P91-3kLi vs Eaton 9PX3000RT-L
The P91-3kLi and Eaton 9PX3000RT-L are both 3 kVA online double-conversion UPS on LiFePO₄ batteries. The P91-3kLi delivers higher usable output power from internal batteries (2700 W vs 2400 W), faster recharge, longer runtime at higher load, and TAA eligibility.
What the P91-3kLi brings
- Higher usable output from internal batteries (2700 W vs 2400 W)
- Longer runtime at higher load (11 min @ 2700 W vs 10 min @ 2400 W)
- Faster recharge (1.5 h vs 3 h to 90%)
- Operation up to 50 °C vs 40 °C
- TAA compliance and a 6-year warranty
Side-by-side specifications
| Specification | Xtreme Power P91-3kLi | Eaton 9PX3000RT-L | Advantage |
|---|---|---|---|
| Battery technology | LiFePO₄ with integrated BMS | LiFePO₄ with integrated BMS | Comparable technology |
| Battery life | Up to 15 yr / 3,000–5,000 cycles | 8–10 years | P91 – longer service life |
| Usable output (internal batteries) | 2700 W | 2400 W | P91 – higher usable power |
| Topology | Online double-conversion | Online double-conversion | Equivalent protection |
| High-temperature operation | Up to 50°C, derates above 40°C | Rated to 40°C | P91 – higher ambient |
| Recharge | 1.5 h to 90% | 3 h to 90% | P91 – faster recovery |
| Runtime (full load) | 11 min at 2700 W | 10 min at 2400 W | P91 – longer at higher power |
| TAA compliance | Yes | No | P91 – federal procurement |
| Warranty | 6-year UPS & battery | 5-year UPS & battery | P91 – longer coverage |
Specifications from Xtreme Power’s supplied P91-3kLi vs Eaton 9PX3000RT-L comparison; confirm against current vendor documentation. High-temperature and battery-life rows added for consistency with the sibling Eaton pages.
Choosing between them
Both are 3 kVA online lithium. The P91-3kLi delivers more usable power from internal batteries and longer runtime at that higher load, plus faster recharge, higher temperature tolerance, TAA, and warranty.
Choose the P91-3kLi if you need
- Mission-critical IT needing full usable internal-battery power
- Edge deployments with elevated temperatures
- Fast battery recharge for availability
- Government / public-sector projects requiring TAA
The 9PX3000RT-L may fit if you need
- Commercial IT standardized on Eaton platforms
- Deployments where reduced internal-battery output is acceptable
- Climate-controlled rooms with predictable maintenance
Related comparisons
Standardizing on lithium rack UPS?
Xtreme Power supports UPS selection, lifecycle planning, and distributed infrastructure design for lithium rack UPS across IT, networking, and regulated environments.