Best Rackmount and Online UPS Battery Backups Ranked

12 rackmount and online double-conversion UPS battery backups.

Last updated: November 9, 2026

Anything built for a rack, and any online double-conversion unit, is grouped here. Line-interactive rack units cost two to three times a tower of the same output; online units cost five or more times as much, in return for zero transfer time and a fully regenerated sine wave. Many accept extended battery modules for longer runtime. Check the plug type: some of these need a 20 A circuit.

Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.

Full ranking 12

  1. CyberPower CP2000PFCRM2U
    #1 of 123.7Full review

    A short-depth 2U rackmount UPS with more output for a loaded rack.

    Amazon $449.95
    $449.95
    2,000 VA / 1,200 WLine-interactive, Sine wave-
  2. CyberPower OR2200PFCRT2U
    #2 of 123.7Full review

    A high-output 2U rack or tower sine wave UPS for a workstation or small server.

    Amazon $740.95
    $740.95
    2,000 VA / 1,540 WLine-interactive, Sine wave-
  3. CyberPower CP1500PFCRM2U
    #3 of 123.7Full review

    A short-depth 2U rackmount UPS for a network rack or small server.

    Amazon $359.95
    $359.95
    1,500 VA / 1,000 WLine-interactive, Sine wave-
  4. CyberPower OL2200RTXL2U
    #4 of 123.5Full review

    A high-output online rack or tower UPS for a loaded server rack.

    Amazon $1,875.95
    $1,875.95
    2,200 VA / 1,800 WOnline (double-conversion), Sine wave-
  5. CyberPower OL1500RTXL2U
    #5 of 123.3Full review

    A rack or tower online UPS with room to add battery modules, for a server room.

    Amazon $1,395.95
    $1,395.95
    1,500 VA / 1,350 WOnline (double-conversion), Sine wave-
  6. CyberPower OR1500LCDRT2U
    #6 of 123.2Full review

    A 2U rack or tower UPS for a small server or workstation.

    Amazon $545.95
    $545.95
    1,500 VA / 900 WLine-interactive-
  7. Tripp Lite SMART1500LCD
    #7 of 123.2Full review

    A convertible 2U rack or tower UPS for a small server or workstation.

    Amazon $276.99
    $276.99
    1,500 VA / 900 WLine-interactive, Simulated sine-
  8. CyberPower OL1K5RM
    #8 of 123.2Full review

    A 1,200 W online rackmount UPS for servers and storage.

    Amazon $1,179.95
    $1,179.95
    1,500 VA / 1,200 WOnline (double-conversion), Sine wave-
  9. CyberPower OL1KRM
    #9 of 123.1Full review

    An entry online UPS for a rack of servers or storage that cannot tolerate any transfer time.

    Amazon $902.50
    $902.50
    1,000 VA / 900 WOnline (double-conversion), Sine wave-
  10. Tripp Lite SMART1500LCDXL
    #10 of 123.0Full review

    The extended-run 2U version for loads that need longer backup.

    Amazon $460.70
    $460.70
    1,500 VA / 900 WLine-interactive, Simulated sine-
  11. CyberPower OR1500LCDRM1U
    #11 of 123.0Full review

    A 1U rackmount UPS for network gear and servers with conventional power supplies.

    Amazon $614.95
    $614.95
    1,500 VA / 900 WLine-interactive, Simulated sine-
  12. APC Smart-UPS SCL500RM1UC
    #12 of 122.8Full review

    A 1U lithium UPS for a network rack where height and battery life matter more than output.

    Amazon $470.99
    $470.99
    500 VA / 400 WSine wave-