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The Vertiv™ Liebert® PSI5 Lithium-Ion UPS is designed to safeguard critical equipment in edge and distributed IT applications. The 1500VA UPS offers more than double the battery life of a traditional VLRA UPS, and comes with a five-year advanced replacement warranty. This Lithium-Ion battery backup includes AVR technology to extend battery life and provides protection from power disturbances. This line interactive UPS system has a rotating LCD display to allow both rack and tower configurations.

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Key Benefits
LITHIUM-ION BATTERIES: Lithium-ion batteries last twice as long as traditional VRLA batteries, or longer.
LOW TOTAL COST OF OWNERSHIP: Fewer or no battery replacement over the life of the Vertiv™ Liebert® PSI5 Lithium-Ion UPS.
5-YEAR ADVANCED REPLACEMENT WARRANTY: Vertiv™ backs this UPS with a 5-year advanced replacement warranty including battery.
LONGER RUNTIME: This 1500VA UPS offers up to 7.5 minutes of runtime at full-load and 17.7 minutes at half-load.
FASTER RECHARGES: Get 100% capacity by recharging in 2 hours or less in this rack/tower UPS.
Best Suited For:
  • Education
  • Banking, Financial and Insurance
  • Government
  • Healthcare
  • Retail and Wholesale
Warranty: Vertiv backs all Liebert® PSI5 Lithium-Ion UPS systems with 5-year advanced replacement warranty including battery. This covers all shipping fees and includes next-day delivery, which ensures customers will receive their replacement unit prior to returning their aged unit.

Sustainability Spotlight

  • Lithium-ion batteries require less onsite maintenance, reducing truck rolls and avoiding associated carbon emissions.
  • Lithium-ion batteries have a longer life, reducing waste and material consumption.
  • Lithium-ion batteries use less material for equal output and up to 99% of the battery elements are recyclable.


Lower total cost of ownership, lithium-ion batteries last twice as long resulting in fewer battery replacements
5 year standard warranty on the UPS and batteries
Longer battery runtime and quicker battery recharge times
Eligible for the Vertiv™ Trade-In Program. Contact a Vertiv partner for discount rates and to calculate your savings
Not for sale in Vermont, Colorado, Washington. 


0.9 Output Power Factor delivers more usable power, saving space and costs 
Tower, 2U Rack/Tower and 3U Short Depth Rack/Tower models available 
Up to ten battery-backed outlets 
Pure Sinewave Output
Programmable outlets 
 Hot-swappable, user-replaceable batteries
Plug and Play installation
Wide input voltage window to prolong battery life
Advance early warning of UPS system status issues 
USB communications for UPS status monitoring and management
SNMP support 
Optional Liebert® IntelliSlot™ IS-UNITY communications card for remote monitoring and control
Remote emergency shut down capability via EPO port

The Liebert® PSI5 Lithium-ion UPS is ideally suited to protect critical infrastructure in edge or distributed IT applications. Lithium-ion batteries have a life expectancy twice that of VRLA batteries – up to 10 years. That translates to fewer (if any) battery replacements over the lifespan of the UPS, which means savings on batteries as well as the labor to install them – an especially important issue at remote locations with few or no IT personnel on site. It adds up to a 50% lower total cost of ownership vs. VLRA batteries. The Liebert® PSI5 Lithium-ion line interactive UPS includes automatic voltage regulation (AVR) technology, which protects against utility voltage fluctuation to extend battery life by maximizing time on utility power, and provides premium protection from power disturbances. In battery mode, the Liebert® PSI5 UPS delivers pure sine wave output to protect sensitive servers and networking equipment. With up to 20 min. of runtime at half load and 9 min. at full load – more than comparable competing models – the Liebert® PSI5 Lithium-ion UPS provides plenty of runtime during an outage for an orderly shutdown. It comes with a rotating LCD display to allow both rack and tower configurations, provides real time information regarding UPS status and operating conditions, and supports remote monitoring. It's also highly energy efficient, delivering up to 97% efficiency at full load in normal operating mode. You can rest assured your business is protected with this Vertiv solution, which includes a 5-year full factory warranty. The Liebert® PSI5 Lithium-ion UPS is a true low-maintenance, set-it-and-forget-it solution. Not for sale in Vermont, Colorado, Washington.

Product Overview
Power Rating
1500VA / 1350W
Input Voltage
Nominal: 120VAC / Range: 75-146VAC
Output Voltage
120VAC Default; 100/110/115/125VAC User Selectable
Up to 97.1% (Normal Mode)
Input: 5-15P; Ouput: 6 x 5-15R
Interface Options
Optional communications card (Liebert® IntelliSlot™ UNITY), USB, EPO connector
SNMP and web management enabled with optional Liebert® IntelliSlot™ UNITY communications card
Control Panel
Rotatable LCD display provides flexible installation options (rack/tower)
Service Access
Front Access (hot-swappable battery kits)
Operational Conditions
Operating Temperature
32° to 104° F (0° to 40° C)
Pure sinewave output on battery
UN38.3, UL 1778, c-UL-us Listed, NOM, FCC Part 15, Class B
Line-interactive (automatic voltage regulation)
Tools & Selectors
Select, compare, or configure UPS systems and models
TCO Calculator
Calculate total cost of ownership for Lithium-ion UPS vs. VRLA
Runtime Tool
Get detailed runtime information for various load levels
UPS Selector
Interactive product selector for single-phase UPS

*To see model-specific downloads, you will need to go to the model-specific product page by selecting the model name in the specifications chart above.

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Vertiv (Liebert Services)
+1 800 543 2378
610 Executive Campus Drive Westerville Ohio 43082 USA
Product areas of focus: Uninterruptible Power Supplies (UPS), Power Distribution, Thermal Management, Integrated Solutions, Racks and Containment
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