Tripp Lite 900VA UPS Battery Backup, 480W AVR Line Interactive, USB, Ultra-Compact (AVR900U)

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 RouterSB6141 Cable ModemArcadyan KVD21 GatewayTrendnet TE100-S16Eg Ethernet SwitchAumox SG308P PoE SwitchObi100 VOIP GatewayObi202 VOIP GatewayThere 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.

I bought this in June for my router/gateway when my old UPS failed during a power outage. Six weeks later a storm knocked out my power for 5 days. This UPS worked flawlessly in keeping my internet running until I could connect a portable generator to keep it and home appliances running. Over the 5 days I turned the generator off for refueling a couple of times a day. The UPS was rock steady in keeping the router running.

I ordered this UPS on October 25, 2023 to use with my home desktop computer. We have a whole house generator, so I bought this Tripp Lite 750VA UPS battery backup and surge protector device, primarily to keep my computer from shutting down during the short time between any power outage and the generator start-up. All was great for the first year! We had several short outages, and the Tripp Lite worked well.At some point during the night of November 11, 2024 the Tripp Lite UPS shut down. To my surprise, my computer had turned off, and I couldn't get it started. After a small amount of sleuthing, I realized that the problem was the Tripp Lite unit. Even though everything was connected and we had had no power outage, the Tripp Lite was off and providing no power to my computer. I connected my computer directly to power, bypassing the Tripp Lite, and of course it worked. I was disappointed that it had been unexpectedly shut down, and had to make sure I hadn't lost any important information, and save the correct versions of the various documents that had been open.Per the owner's manual, I turned the Tripp Lite back on, but I didn't reconnect the computer to it. I was about to shut the computer down to disconnect it and reconnect it to the Tripp Lite, when I noticed that the Tripp Lite had shut down again!! Something was obviously wrong!!This UPS came with a 3 year warranty, and failed shortly after only 12 months. On November 12, 2024, I contacted Tripp Lite support (the company apparently has changed ownership) for help, via the product website, and got a quick response that I would be contacted in 48 hours. Great! However I never heard anything. On November 19, I reached out again, this time responding to the company's email that had promised a within 48 hour response. Again, there was quick response stating I'd be contacted within 48 hours. Unfortunately, there again was no follow-up (yes, I checked my spam folder and my account spam folder on my email providers website). I reached out a third time, on December 12. This time there was no response, what-so-ever.BE CAUTIOUS WHEN CONSIDERING BUYING A TRIPP LITE PRODUCT!! IT APPEARS THAT TRIPP LITE HAS NEW OWNERSHIP, AND IT APPEARS THAT AT LEAST SOME WARRANTIES ARE NOT BEING HONORED!

I bought this UPS to power my cable modem, wifi router, and hubitat hub just in case of a short power outage. We usually don't get length outages, but I wanted to protect from the occasional power dips and glitches so everything doesn't reboot (and for my hubitat hub to not get a corrupted database). My setup was tested a few times so far with very short power outages and it worked fine. It would beep once when the power went out, and that was it. No loud continuous beeps or chimes.This backup unit is pretty heavy and large. I was planning to put it behind my two-drawer credenza, but it was just too wide and thick. Instead, I have it sitting on the floor just to the side of the credenza where it operates quietly (no buzzing at all). In all, I'm very happy with my purchase and hope it will power my devices long enough to last through future short power outages.Update (12/11/2021): I've owned this UPS for over a year now and it's been working perfectly. It lays quietly on my office floor next to my credenza and powers my WiFi router, Cable Modem, and Hubitat Hub. I've had a few power outages and it worked great, keeping my devices powered up for about 2 hours before shutting down. No issues what so ever. I'm glad I made this purchase.

I assume it works but hope I never find out. Power glitch twice blew out the boot record on my SSD so I installed this. Trip-Lite is a reputable brand. Setup instructions are terrible. I had to contact the OEM to get it registered and on-line.