Hello, I have about with the multiples fitted in it, when the boat is plugged in on shore power everything performs normally on the 230v side! but when away from shore power and the 230volt system is used the a/c output wire gets very hot. There are no bad connections and the battery bank running it is 6 x 150amp lithiums, I have checked all the wiring sizing and connections and everything is within spec? any thoughts on what may be causing the wire to get extremely hot?