APC Back-UPS ES 550VA 330W Desktop UPS


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The Back-UPS ES offers our best value for protecting your home and home office computer systems.

Completely redesigned to use less power during normal operation, the Back-UPS ES provides enough backup power for you to work through short and medium length power outages. It also safeguards your equipment from damaging surges and spikes that travel along your utility and data lines.

Most models include our award-winning software, which automatically saves open files and gracefully shuts down your computer during extended outages.

Additional features like an audible alarm, LED status indicator, user replaceable battery, push-button circuit breaker and transformer-block spaced outlets make the Back-UPS ES the perfect unit to protect your productivity from the constant threat of power outages and lost data.



  • Battery-protected and surge-only outlets: Reserves power capacity and run time for connected equipment that require battery back-up while providing surge only protection for less critical equipment
  • Power conditioning: Protects connected loads from surges, spikes, lightning, and other power disturbances.
  • Data line surge protection: Provides protection of connected equipment from power surges on the data lines.
  • Safety-agency approved: Ensures the product has been tested and approved to work safely with the connected service provider equipment and within the specified environment. UL, FCC, CE, C-Tick approvals.


  • Audible alarms: Provides notification of changing utility power and UPS conditions.
  • Automatic self-test: Periodic battery self-test ensures early detection of a battery that needs to be replaced.
  • Cold-start capable: Provides temporary battery power when the utility power is out.
  • Hot-swappable batteries: Ensures clean, uninterrupted power to protected equipment while batteries are being replaced
  • Resettable circuit breakers: Enables a quick recovery from overload events.
  • Transformer-block spaced outlets: Protect equipment with input transformer blocks without blocking access to other receptacles.


Technical Information:

Click here to view a full data spec sheet.

Plug/Connector Type
NEMA 5-15P


  • 4 x NEMA 5-15R – Battery Backup System
  • 4 x NEMA 5-15R – Surge-protected

Dataline Protection
RJ-11 Modem/Fax/DSL

Power Description

  • Load Capacity: 550 VA/330 W
  • Input Voltage: 110 V AC
  • Input Voltage Range: 120 V AC Nominal/88 V AC to 139 V AC Mains Operation
  • Output Voltage: 120 V AC
  • Frequency: 60 Hz
  • Filtering: Full time multi-pole noise filtering : 5% IEEE surge let-through : zero clamping response time

Overload Protection: Resettable circuit breakers


Battery Information
Batteries: Spill Proof, Maintenance Free Sealed Lead Acid User-replaceable Hot-swappable

Backup/Run Time

  • 0.06 Hour 330 W Full Load
  • 0.23 Hour 165 W Half Load

Battery Recharge Time
24 Hour Typical

Physical Characteristics

  • Form Factor: Desktop
  • Dimensions: 3.30-inch Height x 12.00-inch Width x 7.00-inch Depth

Three (3) year limited warranty from APC

What’s in the Box

  • Back-UPS ES 550VA Desktop UPS
  • CD with software
  • USB cable
  • User Manual

Manufacturer Product#: BE550G


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