OPEN BOX - Tripp Lite AVR 550VA Compact Line-Interactive UPS, 8 Outlets, Black (AVR550U) 550 VA

Really like this UPS. It doesn’t make noise when the power goes out. I use it to power my wifi router and cable modem. It gives me about 45 minutes of use after the power goes out. Plenty of time for most outages. I have it mostly because it takes a long time for the cable modem to boot up so it’s nice to not worry about that.

perfect for what i need

I bought the AVR900U to replace a cheap no-name UPS that failed after less than a year. It is providing battery backup for the following network equipment: Peplink Balance 20 Router SB6141 Cable Modem Arcadyan KVD21 Gateway Trendnet TE100-S16Eg Ethernet Switch Aumox SG308P PoE Switch Obi100 VOIP Gateway Obi202 VOIP Gateway There are also several small cooling fans connected to the UPS. After installing the new UPS, I let it run overnight to charge the battery. Then I disconnected it from the power to test how long it would provide backup. It ran for 75 minutes before finally quitting. This is on a new battery, so I'll have to wait to see how long it runs after the battery gets older. I like the fact that Eaton/Tripplite provides a 3-year warranty, so if it fails before then, I can get a replacement. When the time comes, it appears that the AVR900U is designed so you can easily replace the RBC51 battery. Unlike many other UPS, it did not continuously beep while running on battery (which is very annoying). It only started beeping about two or three minutes before the battery died. Also, when I restored the power, the UPS restarted automatically and provided power to all the equipment. This is unlike a few other UPS I have used, which often fail to restart after the battery is run down and require you to push a button to get things going again. This can be especially troublesome if the equipment is at a remote location (as I have learned the hard way). A good UPS should always restart after power is restored, regardless of the battery condition.

Bought this unit a year ago. Started having issue less then a month in. The unit start beeping for no reason. Need to remove the battery every time. I have less than 100w total plugged on the battery side. Talked to Amazon and got the issue fixed but the problem reoccurred a month later. Ask Amazon, and they told me to contact the manufacturer. Been sending emails for more than 6 months now (4 Emails Total) Not a single answer from the manufacturer. I would look somewhere else if you care about quality and consumer support.

works good