Originally Posted by RVhiker
According to a wire gauge chart from Blue Sea at this link
for a 15 foot total distance (7 1/2 feet away from the battery bank for the positive and negative) you'd need 2 AWG for 120 Amps and 1 AWG for 150 Amps. I don't know how many batteries you'd need to supply that much current for a reasonable time, but it'd be more than two.
so maybe I should put the inverter as close to the batteries as possible. Then the 110v can be 10-2 romex which I already have