Vertiv™ Liebert® PSI5 Lithium-Ion UPS 1500VA/1350W 120V AVR Mini Tower, PSI5-1500MT120LI



The Vertiv™ Liebert® PSI5 Lithium-Ion uninterruptible power supply (UPS) is designed to safeguard critical equipment in edge and distributed IT applications. This 1500VA Mini Tower 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 also includes automatic voltage regulation (AVR) technology to further extend battery life and provides premium protection from power disturbances.

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 STANDARD WARRANTY: Vertiv™ backs this UPS system with a 5-year warranty including batteries.
  • 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 mini 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.



  • 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 
  • 2U Rack/Tower form factor, 1500VA Mini Tower and 1500-3000VA 2U Rack/Tower models available
  • Plug and play installation  
  • Up to seven battery-backed outlets 
  • Programmable outlets 
  • Hot-swappable, user-replaceable batteries
  • 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




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