It is still under evaluation, I have had it for less than 1 month. During a 5-minute power outage, it powered 1 PC (less than 350W) with the monitor on. But one downside is that it made a periodic beeping sound, which makes it unsuitable for a bedroom as I initially wanted. Another downside is that its software seems to run on Flash Player, which is being phased out by browsers (Firefox, Chrome, etc.) for security reasons. For about a quarter of an hour that I tried, I couldn't get the software to run. Also, on the first day, as soon as I plugged a printer into it and turned on the printer, it started to whistle continuously. Maybe it was because I hadn't had it (the UPS) plugged in for long when I did this, and the printers don't seem to, but they draw a lot of watts on startup-warmup. For me, maybe 400W.