P91-2kLi: 2000 VA Lithium Iron Phosphate (LFP) UPS
Modern IT, AV, and edge environments can’t afford downtime — or premature battery failures. The Xtreme Power P91-2kLi uses advanced Lithium Iron Phosphate (LiFePO₄) battery technology to deliver up to 15 years of service life and 3–4× the lifespan of lead-acid UPS systems.
Built for demanding applications, it provides clean, continuous power with long runtime, compact rack-or-tower installation flexibility, and enterprise-grade monitoring — at a competitive price point.
Why the P91-2kLi stands out
Up to 15-year design life and 3,000–5,000 charge cycles — 3–4× longer than lead-acid.
Operates up to 50 °C (122 °F), with capacity derating beginning above 40 °C (104 °F).
Continuous, regulated power with zero transfer time — ideal for mission-critical and sensitive IT loads.
Flexible 2U form factor installs in standard IT racks with the optional 4-post rail kit, or stands as a tower.
Significantly smaller and lighter than equivalent lead-acid models — frees rack space, eases install.
Optional SNMP/web card for centralized management, alarms, logging, and remote output control.
Covers UPS electronics and lithium batteries (USA and Canada). Reduced to 2 years in 40–50 °C environments; 2 years depot repair elsewhere.
Connected equipment is covered up to $50,000 in the USA and Canada. Register within 10 days.
Qualifies for U.S. government, education, and public-sector procurement.
A strong alternative to other 2 kVA lithium UPS models
Designed as a direct alternative to comparable Vertiv, Eaton, and APC lithium UPS systems — competitive on runtime, ahead on warranty coverage and TAA compliance, with fast ship times and a lower total cost of ownership.
Where the P91-2kLi leads: more runtime than the Vertiv at full and half load, a 6-year full warranty (electronics and lithium batteries) — longer than the comparable Eaton, Vertiv, and APC models — plus TAA compliance for public-sector procurement, where several competing lithium units don’t qualify.
P91-2kLi at a glance
View the P91 Li datasheet » Full P91 Li specifications and runtimes »
How the P91-2kLi compares
| Feature | Xtreme P91-2kLi | Eaton 9PX2000RT-L | Vertiv GXT5Li-2000LVRT2UXL | APC SRVSL2KRARK |
|---|---|---|---|---|
| Output capacity | 2000 VA / 1800 W | 2000 VA / 1800 W | 2000 VA / 1800 W | 2000 VA / 1800 W |
| Battery | LiFePO₄ (LFP) | LiFePO₄ | Lithium-ion | Lithium-ion |
| Topology | Online double-conversion | Online double-conversion | Online double-conversion | Online double-conversion |
| Runtime at full load (1800 W) | 13 min | See Eaton runtime chart | 10.5 min | Not published for this model |
| Runtime at half load (900 W) | 27 min | See Eaton runtime chart | 22.5 min | Not published for this model |
| Warranty | 6-year full | 5-year | 5-year | 3-year |
| TAA compliant | Yes, standard | No (TAA version is a separate SKU) | No (TAA version is a separate SKU) | No |
Vertiv, Eaton, and APC are trademarks of their respective owners and are referenced here for factual comparison only. Competitor specifications are based on published manufacturer data and are subject to change; verify current figures before purchase. Vertiv runtimes are from the GXT5 Lithium-Ion installer/user guide (Table 8.6, internal battery). TAA: Eaton and Vertiv offer TAA-compliant versions under separate part numbers; the models compared are not TAA. APC states that its TAA-compliant SKUs carry a US or TAA suffix; the SRVSL2KRARK carries neither. Competitor data checked June 2026.
See detailed head-to-head comparisons →Where the P91-2kLi fits
Deploying at scale? See related solutions for UPS for schools (K-12 & E-Rate) and UPS for edge data centers. Need a shallower 1 kVA unit? See the P91-1kLi short-depth comparison.
P91-2kLi: frequently asked questions
What makes the P91-2kLi different from other 2 kVA lithium UPS?
How much runtime does the P91-2kLi give?
How long do the P91-2kLi’s lithium batteries last?
Is the P91-2kLi TAA compliant?
Does it mount in a rack?
What warranty and protection come with it?
Is the P91-2kLi in stock?
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