Eaton Tripp Lite INTERNET550SER – Compact Desktop UPS Battery Backup

Product Overview

The Eaton INTERNET550SER is a compact 550VA / 300W standby UPS built for desktop PCs, network closets, and small commercial workstations that need clean, reliable backup power without consuming rack or desk space. It's a practical fit for network closet UPS installations, point-of-sale terminals, and single-workstation deployments where a full rack-mount UPS isn't justified. With DB9 serial connectivity for UPS monitoring software and eight outlets for battery backup and surge-only loads, it covers the essentials integrators look for in a desktop UPS battery backup unit. Commercial-grade surge suppression and automatic voltage regulation protect connected equipment from brownouts and spikes common in older buildings.

Product Description

Installers specifying UPS protection for small IT closets, reception desks, or individual workstations need a unit that's easy to mount, easy to wire, and easy to explain to a client who isn't an electrical engineer. The INTERNET550SER addresses that directly: it's an ultra-compact desktop UPS that can also be wall-mounted using its integrated keyhole tabs, making it a clean fit in a network closet UPS installation where floor and desk space are limited. At 550VA / 300W, it's sized for a single PC, a small switch, a modem/router combo, or a VoIP phone base station rather than an entire rack, so oversizing costs and unnecessary battery replacement cycles are avoided.

The unit includes a DB9 serial port with a bundled cable for UPS monitoring software integration, letting IT and facilities managers track battery health and runtime status from a connected workstation — a common requirement in commercial UPS deployment where uptime reporting matters. Eight NEMA 5-15R outlets split battery-backed and surge-only protection so integrators can separate critical loads (PC, monitor, network gear) from non-critical peripherals on the same unit. Input is standard 120V through a NEMA 5-15P plug, and the unit runs on a user-replaceable VRLA battery, keeping long-term maintenance straightforward for facilities teams managing multiple small UPS units across a building.

This UPS is commonly specified alongside desktop workstations, small network switches, and single-line phone or modem equipment in office and light-commercial environments. It's a sensible line item on any commercial UPS deployment quote where the goal is basic ride-through power protection rather than extended runtime for large loads.

Key Features

• 550VA / 300W Output Capacity — sized for a single PC, network switch, or small workstation load without oversizing the installation.
• Ultra-Compact Desktop or Wall-Mount Form Factor — integrated keyhole tabs let installers wall-mount the unit in a network closet or tuck it under a desk.
• DB9 Serial Monitoring Port — connects to UPS monitoring software so IT staff can track battery status and runtime remotely.
• 8 NEMA 5-15R Outlets — separates battery-backed loads from surge-only peripherals on a single unit.
• Automatic Voltage Regulation — corrects minor brownouts and overvoltage conditions without switching to battery, extending battery life.
• User-Replaceable VRLA Battery — simplifies long-term maintenance for facilities teams managing multiple units.
• Surge Suppression and EMI/RFI Filtering — protects connected equipment from line noise and transient spikes.
• 3-Year Limited Warranty with $100,000 Ultimate Lifetime Insurance — backs connected equipment against damage from a covered surge event.

Technical Specifications