I am looking at a 5 star Kenmore refrigerator. 18.2 cubic feet upright. Energy use is 383 kwh per year and the unit draws 6 amps while it runs. Using a 12 volt battery bank and a 2500 watt inverter how many Amp hours (size ) bank will I need to run the frig 4 times per day at 1/2 hour times 4 days. This would be a total of 2 hours at 6 amp draw per day times 4 days. Total 8 hours at 6 amps. I would not want to go under 11 volts or past 50% discharge. Im not talking solar panels here. Just the bank.