@farewell_ladmin I went for an "online" ups back in the day, the one that always rectifies the current before generating the 120v sine again. It promises seamless switchover in case of power failure as well as always perfect sine wave for your equipment. And it does. One thing I realized too late however is that by doing that double conversion it adds 100W to the 200W computer that it's protecting, 24x7. With that equation I now simply go for a basic APC BackUPS and that's more than enough for my home needs. I also do 2 different UPSes for my redundant equipment.