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Question:

could i use 2 cable to power 1 object?

I have 8x220ah deep cycle car battery's at 12v and i wanted to run an 5kw 12v power inverter but i would need cable which is 400amp 12x4004800 so could i use two cable connected to the battery's and split the power into 2 cable or would this not work if so whythe inverter would be using 400amps from the battery and it would be supplying 20amps at 240voltsis my working out correct

Answer:

In this case, you should have put the batteries in series to get 48 or 96 volts, that makes the cabling easier. Too late now. Yes, at 5kW, that is 5000/12 420 amps I don't know what size wire you are using, and what the distance is, so I can't help further without that information. For example, if you are running 10 feet of cable (20 total) and you want to lose only 5% of the voltage, which is 0.6 volts, then the resistance of the wire needs to be less than 0.6/420 1.4 mΩ. That is, over 20 feet, 71 mΩ per 1000 feet, which is 000 AWG wire. Mush more than 10 feet, and you need to use MCM wire. .

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