We have the largest sump pump available and it works great as long as the power doesnt go out. The power goes off often, so as a result out basement has flooded many times. We bought a 485. back up battery thinking that would be the solution, but just recently the basement flooded again, the back up didn't work or couldn't handle the volume of water while the power was out. Now what should we do. We bought a generator, but we'll have to be home to turn it on, what happens if we arent' home?