I needed something like this to power my work/gaming PC during the minute or so in-between any power outages and my generator kicking in. So far it has been able to keep up with any momentary power outages and with it's handy mute function my poor dog has been able to survive without too much anxiety. If left un-muted it's squeal is probably enough to wake the dead when the power goes out and it's running low on juice.