3000W Inverter allows your freezer/fridge to run with a  battery (12V, car, boat, deep cycle. The deep cycle will last longer). Ideal feature for total autonomy when power outlet is not available. Battery is charged overnight, easlity connected to the inverter and powers your freezer all day. 
(battery and battery charger NOT included and need to be sourced locally) 
Pictures are for ilustration purposes only, iknverter might be different brand, color, size, etc.