Looking to buy a generator for home use. Need it for 2 refrigerator/ freezers and 2 1/3 hp sump pumps. I checked numerous different charts but they're all different. I think I need at least a 5200 but one chart had me at 7000. When the power goes out, the sump pumps don't work and the rec room will flood. I don't want to spend too much on one that's over the top too powerful.