I’ve been away from the boat for a couple weeks and returned to find the shore power off. It had tripped at the main dock breaker. I reset that breaker and came back to power everything up, and my main AC unit attempts to start then trips the breaker on the boats MDP. After a couple attempts, seems like the AC compressor is locked up. Gets worse. I take the boat for a short cruise, and once back in the slip, I reconnect shore power but now it immediately trips the main dock breaker. As soon as I attempt to add any load ( battery charger, front AC unit) it immediately trips the main dock breaker. I swapped to a different pedestal, same results. I was able to get the power on with the boats MDP Shore Power breaker on and all individual circuit breakers off, so it seems to be down stream of that. I’ve tried isolating an offending circuit by removing one circuit (actually remove the wire from individual breakers on the boats MDP, but can’t isolate it to a single circuit). I thought maybe the Main AC unit had failed in a way that shorted to ground, and removed the power to it at the MDP, that does not solve it either. I now have the generator fired up to charge the batteries, but an going to have to leave the boat completely unpowered. For a couple days including no battery charger. Ideas? Call an electrician? This one has me stumped.