4 12V 300Ah batteries. The ice cream machine has a rated power of 6000 watts and a maximum power of 12000 watts. The input end is 48 volts and the output end is 220 volts AC inverter. Therefore, four 12 volt 300 ampere-hour batteries are needed in series to form a 48 volt direct current output. The total battery capacity is 300 ampere hours. , voltage 48 volts. This configuration can be used throughout the day.