I currently have a sump pump in my basement. I recently lost power during a rain storm and had to pump water out by hand until power was restored so I am looking to install a battery backup for the sump pump. I already have a 110 amp hour marine deep cycle battery which powers a 60 foot pound electric trolling motor for at least 4 hours so I believe that a sump pump should be able to be powered by this deep cycle battery.
I was looking at the sump pump and saw that it should take 920 watts when it is operating and I calculated that by multiplying 8 amps at 115 volts which is what the cap on the top of the sump pump says. I was looking at power inverters and I was wondering would a 1000 watt power inverter be enough power? I heard that when sump pumps first turn on they use more power than their continuous operating level.
EDIT- I was planning on keeping the sump pump plugged in to an outlet unless we lose power. If we did lose power, I was planning on unplugging the sump pump from the outlet and plugging it into the inverter that was being powered by the marine deep cycle battery.