TRIPP LITE INTERNET550U 550VA UPS - Compact Office Backup

Our review of the TRIPP LITE INTERNET550U looks at a compact UPS built for small offices and home workstations that need reliable, short-duration backup power. The bottom line: this unit is for users who want a simple, space-saving backup to ride out brief outages and protect modems or phones with TEL/DSL surge suppression; the combination of 550 VA capacity, USB monitoring and widely spaced outlets makes it practical for a desktop plus peripherals rather than long-term server use.

Key Features

• Battery backup: Supplies battery-derived AC output so connected computers and electronics can be safely shut down during blackouts.
• 550 VA capacity: Provides enough headroom for a typical desktop, monitor and a few small peripherals without oversizing the setup.
• USB connectivity: Enables automatic file save and unattended shutdown using downloadable PowerAlert monitoring software.
• TEL/DSL surge protection: Built-in line suppression protects a modem, fax or phone from surges passing through telephone/data lines.
• Space-saving housing: Ultra-compact design fits on or under a desk and has widely spaced outlets to accept transformer plugs without blocking neighbors.

Who It's For

The INTERNET550U is aimed at home office workers, small business desktops and anyone who needs a short, reliable buffer to save work and power down equipment. It is especially useful where TEL/DSL surge protection and a compact footprint are priorities.

It is not intended for power-hungry servers or extended runtime needs; users requiring long runtime or automatic voltage regulation should look at larger models with AVR and higher watt-hour batteries.

Pros & Cons

Pros

• Compact form factor fits into tight workspaces while still offering battery backup for essential devices.
• Built-in TEL/DSL protection adds a layer of defense for networking equipment connected to phone or DSL lines.
• USB connectivity and free PowerAlert software enable unattended shutdown and monitoring for hassle-free protection.
• Widely spaced outlets accept large plugs without covering adjacent sockets, improving usability.

Cons

• Backup time is limited to short outages (about 10 minutes at half load), so it is not suitable for longer power interruptions.
• The unit does not include automatic voltage regulation (AVR), so it offers less regulation during brownouts than AVR-equipped models.

Specifications

System VA	550 VA
Output Power	150 Watts (approx)
Backup Time at Half Load	10 minutes
Automatic Voltage Regulation (AVR)	No
Battery Recharge Time	15 h
Connectivity	USB with PowerAlert software

Our Verdict

The TRIPP LITE INTERNET550U is a sensible, value-oriented UPS for desktops and small office gear that need quick, dependable backup and TEL/DSL surge protection. Buy it if you need a compact, easy-to-install unit to save work and protect networking devices; look elsewhere if you require long runtimes or AVR for severe voltage fluctuations.

Frequently Asked Questions

How long will this UPS run my desktop?
The unit provides about 10 minutes at half load (roughly 150 W), which is intended to allow safe shutdown rather than extended operation.

Can it protect my DSL modem or phone line?
Yes, the INTERNET550U includes built-in TEL/DSL line surge suppression to help protect modems, fax machines and phones.

Does it regulate voltage during brownouts?
No, this model does not have automatic voltage regulation (AVR); it supplies battery power during outages but does not actively correct low or high line voltage.