Tripp Lite
1111 W. 35th Street
Chicago, IL 60609
1 773.869.1774
1 773.869.1329

AVR Series 120V 550VA 300W Ultra-Compact Line-Interactive UPS with USB port

Model Number: AVR550U

  • 550VA ultra-compact 120V line interactive UPS
  • Corrects brownouts and overvoltages from 83V to 147V
  • 4 battery supported outlets, 4 surge-only outlets
  • USB port, TEL/DSL protection, Wall mountable, 98% efficient
  • NEMA 5-15P input plug and 8 NEMA 5-15R outlets
    • 3-year limited warranty


    Tripp Lite's AVR550U Ultra-Compact Line Interactive UPS offers complete power protection for desktop PCs, network workstations and a wide variety of professional and consumer electronic devices. Uninterruptible Power Supply / UPS circuits switch to battery backup mode within milliseconds to keep connected equipment running without interruption or data loss during power failures. Automatic Voltage Regulation / AVR power conditioning maintains smooth, continuous operation of connected equipment during brownouts and overvoltages. Surge-only outlets offer convenient protection for printers and other desktop accessories not requiring battery support. AC and dataline surge suppression prevents connected equipment damage. USB communications port supports built-in power management and auto-shutdown features of Windows and Mac OS X or full featured monitoring and data-saving auto-shutdown options using Tripp Lite's free PowerAlert monitoring software.


      • AVR550U ultra-compact 120V line interactive UPS offers complete AC power protection from blackouts, brownouts and transient surges
      • 550VA / 300 watt UPS output capacity
      • Uninterruptible Power Supply / UPS operation maintains battery-derived AC output during blackouts to prevent data loss and system downtime for connected equipment
      • Built-in USB port enables data-saving unattended shutdown when used with Tripp Lite's PowerAlert software, available via FREE download from
      • HID-compliant USB port also enables integration with built-in power management and auto shutdown features of Windows and Mac OS X
      • Automatic Voltage Regulation / AVR corrects extended brownouts and overvoltages from 83 to 147V, without using battery power
      • 5.5 minutes runtime at 50% load (150 watts)
      • Up to 10 minutes runtime for an entry level PC with small monitor consuming 90 watts continuous
      • 8 built-in NEMA 5-15R outlets, two with extra wide spacing to accommodate transformer plugs
      • 4 UPS battery backup outlets, plus 4 additional surge-only outlets
      • Right angle NEMA 5-15P input connection with 6ft / 1.8m line cord
      • Network grade AC surge and lightning protection is available from all outlets; Built-in data line surge suppression protects a single dialup or DSL line
      • Supports Tripp Lite's Watchdog system service to restore operation to locked equipment through soft reboot of application/OS or hard power off/on reboot of connected equipment, ideal for unattended kiosk applications
      • 98% line mode efficiency rating uses less energy and BTU emissions
      • Built-in grounding lug
      • Hot swappable user battery replacement
      • Space saving, ultra-compact housing with support for wall-mount, desktop or floor placement

      Package Includes

      • AVR550U UPS System
      • USB cable
      • Instruction manual
      RoHS compliant


      UPC Code037332123442
      UPS TypeLine-Interactive
      Output Volt Amp Capacity (VA)550
      Output Watt Capacity (Watts)300
      Nominal Voltage Details115v nominal output in battery mode
      Frequency Compatibility60 Hz
      Output Voltage Regulation (Line Mode)120V (+8%, -21%)
      Output Voltage Regulation (Battery Mode)115V (+/- 5%)
      UPS Output Receptacles (Surge Suppression Only)4 UPS outlets, 4 surge-only outlets
      Output AC Waveform (AC Mode)Sine wave
      Output AC Waveform (Battery Mode)PWM sine wave
      Nominal Output Voltage(s) Supported110V; 115V; 120V
      Output Receptacles(8) 5-15R
      Individually Controllable Load Banks  No
      Rated input current (Maximum Load)12A
      Nominal Input Voltage(s) Supported120V AC
      UPS Input Connection Type5-15P; Right-Angled
      UPS Input Cord Length (ft.)6
      Recommended Electrical Service15A 120V
      Input PhaseSingle-Phase
      Half Load Runtime (min.)  5.5 min. (150w)
      DC System Voltage (VDC)12
      Battery Recharge Rate (Included Batteries)9 hours (10% to 90%)
      Battery AccessBattery access door
      Battery Replacement DescriptionHot-swappable, user replaceable batteries
      Expandable RuntimeNo
      Voltage Regulation DescriptionAutomatic voltage regulation (AVR) maintains line power operation with an input voltage range of 83 to 147
      Overvoltage Correction  Input voltages between 128 and 147 are reduced by 12%
      Undervoltage Correction  Input voltages between 83 and 104 are boosted by 14%
      SwitchesCombination switch controls on/off power status and self-test operation
      Audible AlarmAudible alarm indicates power-failure and overload status
      LED Indicators2 LEDs indicate power status and overload/check battery status
      UPS AC Suppression Joule Rating420
      UPS AC Suppression Response TimeInstantaneous
      UPS Dataline Suppression1 line TEL/DSL (1 in / 1 out)
      EMI / RFI AC Noise Suppression  Yes
      Installation Form Factors Supported with Included AccessoriesTower; Ultra-compact desktop; Wallmount
      Primary Form FactorDesktop
      Primary UPS Depth (mm)152
      Primary UPS Height (mm)89
      Primary UPS Width (mm)284
      Shipping Dimensions (hwd / in.)4.72 x 13.39 x 8.66
      Shipping Weight (lbs.)9.42
      UPS Housing MaterialABS
      UPS Power Module Dimensions (hwd, in.)3.50 x 11.20 x 6.00
      UPS Power Module Weight (kg)3.99
      UPS Power Module Weight (lbs.)8.8
      Operating Temperature Range+32 to +104 degrees Fahrenheit / 0 to +40 degrees Celsius
      Storage Temperature Range+5 to +122 degrees Fahrenheit / -15 to +50 degrees Celsius
      Relative Humidity0 to 95%, non-condensing
      AC Mode BTU / Hr. (Full Load)  23
      AC Mode Efficiency Rating (100% Load)98%
      Communications InterfaceUSB (HID enabled)
      PowerAlert SoftwareFor local monitoring via the UPS’s built-in communication ports, download PowerAlert Local software at
      Communications CableUSB interface cable included
      WatchDog CompatibilitySupports Watchdog application, OS and hard-reboot restart options for remote applications
      Network UPS Tools CompatibilityYes
      Transfer Time  4 milliseconds
      Low Voltage Transfer to Battery Power (Setpoint)83
      High Voltage Transfer to Battery Power (Setpoint)147
      Cold Start (Startup in Battery Mode During a Power Failure)Cold-start operation supported
      High Availability UPS FeaturesHot swappable batteries
      Green Energy-Saving FeaturesGreater than 95% efficiency - GREEN UPS
      UPS CertificationsTested to UL1778 (USA); Tested to CSA (Canada); Tested to NOM (Mexico); Meets FCC Part 15 Category B (EMI)
      Product Warranty Period (U.S. & Canada)3-year limited warranty
      Connected Equipment Insurance (U.S., Canada & Puerto Rico)$100,000 Ultimate Lifetime Insurance 


      Management Hardware
        Model Number Description
      WATCHDOGSW | Management Hardware WATCHDOGSW WatchDog Service Monitoring / Reboot Software

      Extended Warranties

      Part Number Description
      WEXT1B 1-Year Extended Warranty - For select Tripp Lite Products
      WEXT2B 2-Year Extended Warranty - For select Tripp Lite Products
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      Need help with your purchase?
      We're always available to help with questions, including product selection, sizing, installation and product customization. Call us at 1 773.869.1774 or email