Cathi:
I haven't grounded the boat for lightning strikes. The only thing I've done AC-wise was to install a proper RCCB for the shore power and
this year I will probably add a galvanic isolator. An excellent source of information for things electrical and mechanical is Nigel Calder's
"Boatowner's Mechanical and Electrical Manual". I don't do serious work on the boat without consulting that book first.
-Nicholas