Bob Kovak wrote: <<Bob : when the above happens your probably going to exceed the rating on the Main Breaker in your onboard panel or on the dock pedestal and one of them is going to trip out. You might consider a little energy managment to stay with in safe electrical parameters.>> And he's sort of right, as far as he goes but mostly that's really bad advice. With a 30 amp boat on a 30 amp pedestal load sharing won't do you any good at all. However, out in the real world you will encounter a host of situations where its real handy: 30 amp boat on a 20 or 15 amp pedestal; 50 amp boat on a 30 amp pedestal; etc. etc. etc. Load sharing will specifically PREVENT the breaker on the dock from tripping by managing the load coming through the shore cable according to parameters that you can set up for yourself. If you are buying an inverter anyway, load sharing alone is worth the price of a PSW inverter.