P91-2kLi 2000VA Lithium (LFP) UPS Comparison

P91-2kLi Lithium UPS

P91-2kLi — 2000 VA Lithium Iron Phosphate (LFP) UPS

Typically in stock TAA Compliant 6-Year Full Warranty Online Double-Conversion

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.

Xtreme Power P91-2kLi lithium UPS rack-mounted above an external bypass module, with output cables connected
The P91-2kLi rack-mounted with an external bypass module (XBDM) — maintenance and battery service without downtime
Capacity
2000 VA / 1800 W
Battery
LiFePO₄ up to 15-yr life
Runtime
14 / 30 min full / half load
Form factor
2U rack or tower
Key Advantages

Why the P91-2kLi stands out

Long-life lithium

Up to 15-year design life and 3,000–5,000 charge cycles — 3–4× longer than lead-acid.

Temperature resilient

Operates up to 50 °C (122 °F), with capacity derating beginning above 40 °C (104 °F).

Online double conversion

Continuous, isolated, regulated power — ideal for mission-critical and sensitive IT loads.

Compact 2U rack/tower

Flexible 2U form factor installs in standard IT racks or tower orientation, no extra hardware.

Lightweight & space efficient

Significantly smaller and lighter than equivalent lead-acid models — frees rack space, eases install.

Remote monitoring

Optional SNMP/web card for centralized management, alarms, logging, and remote output control.

6-year full warranty

Covers UPS electronics and lithium batteries (USA & Canada). Reduced to 2 years in 40–50 °C environments.

TAA compliant

Approved for U.S. government, education, and public-sector procurement.

The Alternative

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: 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.

Product Highlights

P91-2kLi at a glance

Capacity
2000 VA / 1800 W
Topology
Online double-conversion
Runtime
14 min (full load) / 30 min (half load)
Battery
Internal Lithium Iron Phosphate (LiFePO₄); hot-swappable for zero-downtime maintenance
Form factor
2U, rack/tower convertible
Receptacles
8 × NEMA 5-15/20R
Communications
USB, SNMP, dry contact
Warranty
6-year full (electronics & lithium batteries, USA & Canada); 2-year in 40–50 °C environments
Compliance
TAA compliant
Availability
Typically in stock and ready to ship

View the P91 Li flyer »  [ADD FLYER URL]

Xtreme Power P91-2kLi 2U lithium UPS front panel with status LCD showing OK at 120V
P91-2kLi front panel — 2U rack/tower form factor with status LCD
Competitive Comparison

How the P91-2kLi compares

FeatureXtreme P91-2kLiEaton 9PX2000RT-LVertiv GXT5Li-2000LVRT2UXLAPC SRVSL2KRARK
Output capacity2000 VA / 1800 W2000 VA / 1800 W2000 VA / 1800 W2000 VA / 1800 W
BatteryLiFePO₄ (LFP)LiFePO₄Lithium-ionLithium-ion
TopologyOnline double-conversionOnline double-conversionOnline double-conversionOnline double-conversion
Warranty6-year full5-year5-year3-year
TAA compliantYesYesNoNo

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.

See detailed head-to-head comparisons →
Ideal Applications

Where the P91-2kLi fits

Edge computing & micro data centers Network closets & IDF/MDF rooms AV & control systems Retail & restaurant environments Healthcare & security devices K-12 schools (E-Rate eligible)

Deploying at scale? See related solutions for UPS for schools (K-12 & E-Rate) and UPS for edge data centers.

P91-2kLi — frequently asked questions

What makes the P91-2kLi different from other 2 kVA UPS?
It uses Lithium Iron Phosphate (LiFePO4) batteries, which last far longer and tolerate heat better than the VRLA batteries in most 2 kVA UPS — avoiding the premature battery failures common to lead-acid.
How long do the P91-2kLi's lithium batteries last?
LiFePO4 cells deliver many times the cycle life of lead-acid, so the P91-2kLi's batteries typically last years longer, reducing replacements, maintenance, and total cost of ownership.
What loads is the P91-2kLi designed for?
It protects up to 2000 VA of IT, AV, and edge equipment — servers, network racks, AV systems, and other always-on gear that can't afford downtime.
How does the P91-2kLi compare to other 2 kVA lithium UPS models?
The comparison on this page weighs battery technology, runtime, and value. The P91-2kLi stands out as a strong alternative, backed by fast shipping and competitive pricing.
Why choose lithium over lead-acid for a 2 kVA UPS?
Lead-acid batteries degrade faster, especially in warm spaces, and need frequent replacement. LiFePO4 lasts longer, handles heat, and lowers lifetime cost — ideal for unattended IT and edge sites.
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Our specialists will help you size and configure the right lithium UPS for your environment.

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