How thick cables need to be for use with the inverter?
First of all, you should calculate how much current your inverter will be drawing at maximum capacity with the method described above. For example, 100A in the case of a Mass Sine 12/1200. Then count one millimetre per three amps. The standard cable thickness closest to that is 35 mm². This rule applies to cables up to three meters in length. If the inverter is further away from the battery, choose the next size (50 mm² in this case).
