(big snip)
There's absolutely NO reason why the independent DC system should be
connected to the AC ground bus I know of. Ours isn't.

One guy we know had a bozo miswire his shore cord, and while lying
along side his engine, grabbed hold of an AC grounded appliance frame. A
hearse was needed to transport him to the next event in his life.
Many of you have seen this waiting to happen, and maybe turned a little
skin into smoke.
Electricity is not foolproof! Eat your zincs out!

Lynn....... see these scars?