2kVA Online Lithium UPS P91-2000Li

2kVA Online Lithium UPS Online UPS

The P91-2000Li provides 2kVA of clean and stable electrical battery backup power to mission-critical equipment during and after a power loss or disruption events.

  • P91Li UPS lithium-ion batteries provide more than twice the life, higher temperature tolerance, longer runtime, and faster recharge than conventional lead-acid UPS. Online double conversion technology makes P91 Li UPS ideal for protection of the most critical network, server, edge and distributed IT applications.
  • Up to 10 year battery life
  • The Double Conversion Online technology, protects attached critical equipment by providing stabilization and power conditioning to incoming electrical power.
  • Zero transfer time from loss of power to battery backup for uninterrupted operation of connected equipment.
  • Peace of mind by protection for critical equipment from daily incoming electrical surges up to 800 Joules.
  • Purchase with confidence!  The P91-2000Li UPS is backed by an industry leading 6-year product warranty and a $50,000 Load Protection Policy.
  • For questions or quotations please contact us via Chat, Phone or email at sales@republicpowersystems.com 

SKU: 90000905-1-1 Categories: ,

Product description

Features of the P91-2000Li UPS include:

This 2kVA Online Lithium UPS delivers continuous, pure sine wave AC power to critical electrical equipment.  The P91-2000Li provides tower, rack, and wall mount configuration options.  It protects your equipment from blackouts, brownouts, sags, surges, and noise interference. The P91-2000Li offers the lowest total cost of ownership by cutting energy costs and lowering heat output.

Within the 2kVA Lithium UPS is a Lithium Iron Phosphate (LiFePO4) battery provides battery life of up to 10 years, eliminating the battery maintenance and refresh needs of UPS with lead-acid batteries. When compared to lead acid batteries, lithiumion batteries provide more than twice the service life, higher temperature tolerance, longer internal runtimes, and faster recharge.

  • INPUT VOLTAGE: Single Phase 120VAC (6′ power cord with 5-15P plug)
  • OUTPUT VOLTAGE: 120VAC nominal (100/110/115/120/127 VAC selectable)
  • RUNTIMES: 14min. @ Full power draw and 30min. @ half power draw
  • OUTPUT OUTLETS: (8x) NEMA 5-15R outlets (Programmable)
  • UPS TOPOLOGY: Double Conversion Online
  • BATTERY: Lithium Ion (LFP26650 2600 mAh)
  • MOUNTING OPTIONS: Tower, wall (2U units), 2-post and 4-post rack mounting configurations available
  • EFFICIENCY: 98% efficient power saving operation in ECO mode
  • COMMUNICATIONS INTERFACE: RS-232, USB, EPO, intelligent slot for optional cards (Web/SNMP, Relay/dry contact, Modbus)
  • CERTIFICATIONS: UL, cUL, RoHS, FCC Class A, battery packs comply to UL1973, UN38.3 for battery transportation
  • WARRANTY: 6 years electronics, 6 years battery warranty (USA and Canada)
  • OPTIONS: Bypass distribution (XBDM), power distribution (XPDU), 4-post rail kit, 2-post shelf kit, wall mount bracket

Addtional benefits of the 2kVA Online Lithium UPS include:

AUTO RESTART: After full battery discharge, the P91-2000Li automatically restarts when utility power returns

98% EFFICIENT OPERATION: High efficiency ECO mode lowers energy consumption, in Line Mode

SMART LCD DISPLAY: Vital monitoring and precise information is brightly displayed on the front LCD interface.

FREQUENCY CONVERTER: The P91-2000Li can be programmed to convert from 50Hz to 60Hz or 60Hz to 50Hz

LOAD SHEDDING CAPABILITIES: Maximize up-time for critical loads and equipment by shedding less critical loads

EXTENDED BATTERY RUN-TIMES: Optional external battery packs for extended battery backup run-times

HOT SWAPPABLE BATTERY: Replacement batteries are hot swappable without interruption to the load

MAINTENANCE BYPASS: An optional bypass module enables the P91-2000Li to be replaced or serviced without interruption of power to critical loads

SURGE PROTECTION: 800J of surge protection

$50,000 LOAD PROTECTION POLICY: protection against damaged connected equipment

Power Protection provided by the 2kVA Lithium UPS:

  • Power problems such as electrical surges and sags
  • Total loss of electrical power or hard power “re-boots”
  • Unstable incoming power caused from outdated or faulty electrical wiring and or power distribution equipment
  • Harmonic interference from neighboring “high power draw” equipment
  • Severe weather events such as lighting storms, ice and snow storms and downed power lines
  • Unstable power generation from local utilities or on-site generation

Click here to learn more about the TOP 10 POWER ISSUES and UPS power protection features

Wide Power Input

The 2kVA Lithium UPS supports incoming wide AC power input. The automatic voltage regulator (AVR), protects the UPS and connected equipment from adverse voltage conditions. This wide AC input capability can offer sag and surge protection without engaging the backup batteries of the UPS. This will reduce the stress on connected critical equipment and extends the battery life of the UPS.

Double Conversion Topology
Double Conversion Technology

Double Conversion Technology

The P91-2000Li is a true online double conversion uninterruptible power supply providing the ultimate in clean and stable electrical power. Incoming AC power is fed to the UPS’ rectifier converting it from AC to DC power. The converted DC power routes to a battery charging circuit and to the inverter for conversion back to AC power. The resulting “double converted” electrical power is pure sine waveform output providing near perfect electrical power for connected equipment.

To ensure 7/24 up time the double conversion UPS topology utilizes a static “bypass switch” within its circuity design. If 2kVA Online Lithium UPS detects a system failure, audible alarms will sound as the bypass switch is engages. This routes power around the failed UPS and ensures critical load power to target equipment.  This very important feature allows for 100% up time for critical equipment while the UPS can be repaired or replaced.

In the event of total power failure, the UPS will power off the rectifier when the loss of power is detected. Under battery mode the internal backup batteries will continue to supply DC power to the inverter. There is no transfer time as the transition to battery power is instantaneous. This feature provides true uninterruptible power to mission critical equipment.

Technical Specifications



Rated Power Capacity (Apparent/Active)

2000VA (1800W)

Voltage Range


Frequency Range

50/60Hz auto sensing

Surge protection


Rated Voltage (Output)

100**/110/115/120/127 VAC selectable

Wave Form Type

Pure sine wave, zero transfer time

Rated Frequency

50/60Hz ± 0.5Hz

Efficiency (Maximum%)

Up to 98%

Crest factor


Overload Capacity

≤ 130% for 2 min; ≤ 200% for 10 sec; >200% for 1 sec

Battery Type


Battery quantity and size


Typical Recharge Time (100%)

1.5 hours to 90% charge

Unit Size (HxWxD)

17.2 x 19 x 3.5

Unit Weight


Cord Length

6 ft, 5–20P

Output Connection

(8) NEMA 5–15/20R

Operating Temperature

32–104°F (0–40°C)

Acoustic Noise

< 45dBA

Operating Elevation

11,500 ft above sea level


UL, cUL, RoHS, FCC Class A, battery packs comply to UL1973, UN38.3 for battery transportation


RS-232, USB, EPO, intelligent slot for optional cards (Web/SNMP, Relay/dry contact, Modbus)


6 years electronics, 6 years battery warranty (USA and Canada)

Whats in the box

Horizontal Brackets
Software CD
Tower Pedestals
User Manual x1

Available Options

2-post Shelf Kit
4-post Rail Kit
5 year extended warranty
Bypass Distribution (XBDM)
Power Distribution (XPDU)
Wall Mount Bracket

Weight29.1 lbs
Dimensions23.6 × 19.7 × 9.45 in

Estimated Run-Time

Battery Run Time Graph