Hello, I am adding the AIO 6K to my RV. The service comes into the camper as 4 wire with 2 legs, 1 neutral and an earth ground to the panel inside the camper. I had my installer run a new line from the outside service plug straight to the inverter. The inverter only has 3 wires, 2 legs and a neutral back to the panel. Do I connect the panel ground to the service ground on the inverter?