Quote:
Originally Posted by petefoss
Correct, on my 31W the inverter is directly connected to the batteries and us independent if the rest if the 12V system. The only common connection is the 120V bypass built-in to the inverter.
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Best practice is connect the inverter's ground directly to the battery bank. The size of the cable (wire) is dependent on the max current draw and the distance of the run. My inverter is under the bed and the battery bank by the front door some 20 ft of cable run. The book answer for a 3% voltage drop is 1 AWG cable for 166 amps. Since Thor MC installed a 1000 watt inverter with 4 AWG cable, I added another 4 AWG wire and a 100 amp circuit breaker since it was what I had. For the return run, I had to buy 1 AWG cable ($59.80 from Amazon). No problem with my Xantrex Freedom Xi 2000 watt programmable inverter.