Since Adesso became ours the AC switching has always been hard to understand. We have two 30 amp Shore power lines and two AC panels, a generator and inverter. Switching between sources was handled by a Blue Sea rotary switch that was wired in such a way that we could not charge our house batteries with the generator, frustrating. I finally determined that Blue Sea made a switch designed to do exactly what we need so the swap began. What a shock (haha) to discover that the way the old switch was wired – ground wires from all sources to the same terminal, were a melted mess. I was very lucky to avoid a fire!!! New switch installed things are much better and yes when we have to run the generator it will charge our house batteries!!!