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Tripp Lite INTERNET550SER Internet Office 550 VA 300 Watts 8 Outlets Standby UPS for PCs

Ships from United States. Most customers receive within 2-8 days.

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  • 550VA ultra-compact 120V standby UPS
  • 4 UPS battery supported outlets, 4 surge-only outlets
  • DB9 serial port, TEL/DSL protection
  • NEMA 5-15P input plug and 8 NEMA 5-15R outlets

  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Tripp Lite INTERNET550SER UPS System

Power problems—including blackouts, brownouts, power surges and line noise—threaten your investment! They can damage or destroy PCs and other expensive equipment, wipe out valuable data and files, and degrade component performance. Get protected with Tripp Lite's INTERNET550SER UPS System. It provides reliable battery backup that can keep a basic desktop PC operational for up to 17 minutes during blackouts. Surge suppression and EMI/RFI line noise filtering prevent hardware damage and performance problems such as poor-quality audio and video output. The INTERNET550SER's 550VA/300W capacity provides ample capacity for a wide range of home and office PC setups, workstations, point-of-sale systems and more. It features four battery-supported AC outlets for computer, monitor and other vital system peripherals, plus four surge suppression-only outlets for accessories not requiring battery support. One set of tel/DSL (RJ11) jacks protects connected equipment on a tel/DSL line. One DB9 serial communication port plus free PowerAlert software (available via Web download) enables unattended system shutdown and file saves in case of a prolonged power failure. The INTERNET550SER comes with $100,000 Ultimate Lifetime Insurance coverage for connected equipment and a 3-year product warranty.

Ideal for Protection of Home or Office PCs and Peripherals
Feature Focus
Green High-Efficiency Design
Reliable Battery Backup
EMI/RFI Line Noise Filtering
Data Line Protection<
DB9 Port and Free PowerAlert Software

Ideal for Protection of Home or Office PCs and Peripherals

With reliable battery backup, tel/DSL jacks and a DB9 serial communication port, the INTERNET550SER offers a complete power protection solution for a wide range of home and office electronics. The INTERNET550SER features a split-outlet design with eight total AC outlets: four to provide battery backup support and surge protection for computers, monitors and other critical components; four to provide surge protection only for peripherals such as printers and scanners that do not need battery backup.

Green High-Efficiency Design

High-efficiency operation—greater than 95%—saves energy, lowering your electric bill and reducing your carbon footprint. High-efficiency models also consume fewer resources during manufacture and distribution than previous models.

Reliable Battery Backup

UPS battery backup support enables you to work through short power failures, and provides time to save files and perform an orderly system shutdown in case of a prolonged blackout. The INTERNET550SER features an internal battery that provides 17 min. of battery support for a basic desktop PC, 11.5 min. for a half load (150 Watts) and 3 min. for a full load (300 watts). During normal operation, incoming utility power keeps the UPS battery fully charged so that backup power will always be available when needed.

Surge Suppression

A sudden power surge or spike can damage or destroy electronic components and wipe out irreplaceable data. The INTERNET550SER features 420 joules of built-in surge suppression to protect all connected components and the data they contain.

EMI/RFI Line Noise Filtering

Various electromagnetic and radio sources can cause disruptive interference on the AC line. This line noise is a common cause of incremental hardware damage, data corruption and audio/video performance problems. The INTERNET550SER incorporates technology that filters out disruptive line noise, preventing it from affecting your equipment.

Data Line Protection

The INTERNET550SER includes one set of tel/DSL (RJ11) jacks to protect a standard telephone, fax, dialup modem or DSL connection.

DB9 Port and Free PowerAlert Software

The INTERNET550SER features a DB9 serial communication port (DB9 cable included). Used with Tripp Lite's free PowerAlert software (available from Tripp Lite as a Web download), this serial port enables safe unattended system shutdown and file saves in the event of a prolonged power failure.

Versatile Installation Options

The INTERNET550SER features a space-saving, ultra-compact housing that fits on a desktop, a shelf or almost anywhere. Its 6-foot power cord features a right-angle plug that allows furniture to be placed flush against the wall. The INTERNET550SER's housing is equipped with integrated keyhole mounting slots for secure wall-mount installation.

Environmentally Responsible

The INTERNET550SER is manufactured in compliance with strict RoHS guidelines to minimize the use of hazardous materials, and its internal battery is 100% recyclable.

Ultimate Peace of Mind

The INTERNET550SER comes with $100,000 Ultimate Lifetime Insurance coverage for connected equipment and a 3-year product warranty.

Technical Specifications

  • Voltage compatibility: 120VAC
  • Frequency compatibility: 60Hz
  • VA/Wattage Capacity: 550/300
  • Battery runtimes (half/full): 11.5 min. (150W) / 3 min. (300W)
  • Outlet quantity/type: 8 x 5-15R (4 UPS/surge, 4 surge only)
  • Signal line protection: RJ11 tel/DSL jacks (1 set)
  • Communications ports: 1 x DB9
  • Input cord: 6ft.
  • Input plug: 5-15P right-angle
  • Switches/LEDs/alarms: On/off/self-test switch; 2 diagnostic LEDs; Audible alarm
  • Dimensions (HWD): 3.1 x 10.9 x 5.7in.
  • Weight: 6.5lbs
  • UPS housing material: ABS plastic
  • Agency approvals: Tested to UL 1778 (US) / CSA (Canada); NOM (Mexico); FCC Part 15 Category B (EMI); RoHS
Runtime Chart
What’s in the Box

What's in the Box

  • INTERNET550SER UPS System
  • DB9 Serial Cable
  • Instruction Manual
Tripp Lite
Internet Office® UPS Systems
INTERNET350SER
INTERNET350SER
INTERNET550SER
INTERNET550SER
INTERNET750U
INTERNET750U
VA/Watts 350/180 550/300 750/450
Outlets 6 (3 UPS; 3 surge only) 8 (4 UPS; 4 surge only) 12 (6 UPS; 6 surge only)
Half-Load Runtime 10 min. (90W) 11.5 min (150W) 11 min. (225W)
Additional Protection Tel/DSL Tel/DSL Tel/DSL
Communication Ports DB9 DB9 USB
Warranty 3-year 3-year 3-year

Learn more about the Tripp Lite INTERNET550SER

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 0 day
  • Read full details
Ownership: 1 month to 1 year
Verified Owner
1/ 5
Absolute poop. 3/5/2015 11:06:53 AM

Pros: None.

Cons: Too many cons to list them all.

We bought 300 some odd of these units here at the shop. Of them 20 didn't work out of the box and about 10 quit within 2 weeks of being installed. Several of which smell like burning. We've also have had several that refuse to turn off and require opening of the case to physically disconnect the battery.

On that note it is the only UPS I have ever seen that you have to unscrew the case to change the battery, which is pathetically undersized compared to an APC unit.

The insides do not inspire confidence either, single sided paper-phenolic PCB stuffed with the finest generic parts China can offer.

Overall Review: According to the manufacturer the 300W this unit is rated for isn't enough for most desktop computers and apparently plugging in a computer that has a bigger power supply will instantly void your warranty, which I should point out no where on the box does it say this.

Did you find this review helpful?
Manufacturer Response:
Matt, I apologize for the inconvenience you experienced with your INTERNET550SER. If you haven’t already done so, please reach out to our Chicago-based Tech Support team at 773.869.1234 (M-F, 7am-6pm CST) so we troubleshoot the issue you described, provide you with a solution and/or send you a replacement since the INTERNET550SER comes with a 3-year warranty.
Ownership: 1 month to 1 year
1/ 5
Worst Piece of Junk I've ever owned. 7/20/2010 12:06:29 PM

Pros: Makes a nice paperweight now.

Cons: I owned this thing for about six months with little trouble. There wasn't ever a power outage that involved my immediate attention so I really can't say whether it even worked right out of the box. After about four months time we had a storm and the power went out.. so did my computer. After unplugging the computer from it and removing it from the wall the backup snapped loudly and internally caught fire, filling my room with the stench of burnt plastic. I contacted Tripp-Light and was told the average output of a standard desktop computer is too much for it to handle. Because of this it's not covered under warranty. How or why it caught fire AFTER being unplugged from the computer and the wall was never addressed and was brushed aside.

Overall Review: I wouldn't recommend this at ALL if you're hoping it will keep an average desktop computer running. I'm hard pressed to even recommend it to handle the most basic of electronics. How or why New Egg still sells this piece of junk to us tech geeks I don't know. I shudder to imagine if I'd attempted to keep my scanner and printer on it as well. I made the mistake of buying this thing hoping it would do its job not realizing Tripp-Lite continues to make a battery backup that's TOO far underpowered and overpriced to handle even a toaster. I should have stuck with my gut and gone with an APC backup which are MADE to handle computers at their basic settings.

3 out of 5 people found this review helpful. Did you?
Ownership: 1 week to 1 month
Verified Owner
3/ 5
The New Model 11/17/2008 6:33:45 AM

Pros: Great for keeping single PC's or Switch/Router rooms up and safe from surges and power outages.

Cons: This is the new model with many changes from the old one. The first one I got was bad. Kept shutting off after a few seconds. I found out the 12V Battery was only putting out 7V. RMAed and got a new one.

Overall Review: The others I got are working so far.

3 out of 4 people found this review helpful. Did you?
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