I removed all the in and out 120 wires and the battery negative from the magnum then went back to the control panel. I think I have it narrowed down to one of the 120 volt circuits. It was a short day today so I didn't continue on. Volt meter from hot to frame reads 126 volts on generator. He also says any time he gets a shock the magnum monitor panel goes black screen and needs to be reset by removing the data cable. It then has to see a complete charge to reset the ah counting and battery percent full gauge.