Lucky for me, my house has a 115v 30 amp circuit in the basement. It used to be for the dryer and sump pump, but the dryer at some point was replaced with gas. The sump pump draws around 8A if I remember... 1 HP motor?
Anyways I hooked up a 2000VA UPS to suck up the spike from the sump pump kicking in (runs a couple times per day, more if there's raid), it's more than enough to run multiple computers, TV, game consoles, beer fridge, etc without any problems.