I have a APC UPS 1500 it works very good you just have to change batteries after a couple years or you are in trouble. I power 2 pumps and a heater, so everything still runs through my sump it lasts for hours as long as you maintain them they work. Get a good one and a good brand helps also you pay for what you get. buy the UPS are meant to hold and run items for hours if not days if you get one that has enough wattage. mine has 1500 watts using two sealed batteries tied together. All I can say is buy the best and you get the best. I can hook my computer up to the UPS and make power adjustments when doing trill runs making it more efficient.

Bill