Liebert PSA500 review

An enterprise level UPS filters down to the mainstream

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Our Verdict

This UPS offers a decent amount of power for the cost but we think it's aimed more at the business sector rather than the home


  • Good amount of power
  • Good design


  • No 13A sockets
  • Only two IEC leads supplied

The Emerson Liebert PSA 500 is aimed at business applications rather than home users.

This goes some way to explaining the pricing, which is more than double that of the Zigor and a touch more than the APC unit, despite the Liebert's lower VA rating. It also explains the different form factor.

The PSA 500 is a desktop design with controls placed at the front and sockets hidden away at the rear. It has the advantages of a line-interactive design, and the back-up time is a respectable seven minutes at full load.

To save space on the rear panel, the outlets are IEC rather than 13A sockets and two IEC-to-IEC leads are provided.

However, if you want to use all four sockets you'll need to buy extra leads, and for equipment that doesn't have an IEC socket, such as a printer with a hard-wired 13A lead or a router that's powered by a 13A power supply block, you'll also need to fork out some cash for a converter cable.

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Tech Specs

Product TypeLine-interactive UPS
Product FamilyPSA
Backup/Run Time (Half Load)13 Minute
Backup/Run Time (Full Load)5 Minute
Load Capacity (VA)500 VA
Load Capacity (Watt)300 W
Receptacles1 x IEC 320-C13, 3 x IEC 320-C13
Brand NameLiebert
Maximum Battery Recharge Time8 Hour
Height171 mm
Width95 mm
Depth356 mm
Product SeriesPSA
ManufacturerEmerson Network Power
Product ModelPSA500MT3-230U
Product NamePSA 500VA Tower UPS
Input Voltage220 V AC
Manufacturer Part NumberPSA500MT3-230U
Manufacturer Website Address
Marketing InformationPSA 500VA Tower UPS designed with simple controls for easy operation, the Liebert PSA provides up to five minutes of back-up time at full load...more than enough time to save work in process and shut down your system. Shutdown software and a USB cable are also included, to allow remote alerts and automated graceful shutdown of the connected systems.
Package Contents
  • PSA 500VA Tower UPS
  • User Manual on CD
  • Software CD
  • USB cable
  • Safety Instruction Sheet
  • Environment protection sheet
  • 2 x IEC output cables for 500/650VA
Limited Warranty2 Year
Output Voltage252 V AC
Weight (Approximate)5.40 kg