[McGillicuddy]

Blue, Your interpretation is correct - starter and accessories draw only from their respective dedicated battery but share the charging function. I'm pretty sold on the system. The red thing is a 60A fuse protecting the cable that connects to the fuse block. I have one fuse on each battery, and the one at the switch. I think USCG requires a fuse within 6' of each battery and its switch. The one on the switch was suggested by Blue Sea. Probably overkill, but after reading the Calder bible, I'd rather smoke a fuse than burn a wire.