Elessar
Well-known member
Mine has a simple manual rotary switch to change from generator to 2x16A shore. It’s next to the generator on switch so is no great hassle and it does exactly as you describe.I would guess Mapism that Princess have fitted a VSR that joins the two 230v buses on the boat when the relay senses 230v from genset, but doesn't join the two buses when only one of the shore leads is plugged in. I seem to remember that's how my Squadron 58 classic was wired.