Oh.. .batteries always bother me.
On my triton, I had a 36v trolling motor so had 3 DC for that. Then, I had 3 more batteries for the cranking and electronics. I kept a backup for the cranking and would tie into it for a spare house if I really had to. but.. one thing I hope to do is add a couple DC for my house system on the GW...if I can figure how to do it, I will add 3 for the house and leave the 3 other batteries as 2 cranks and a backup.
I overkill stuff.. lol.. but had an issue with one boat where it always died...and vowed never to let the battery be an issue again
That being said... probably way overkill and not needed... heh.. but not sure what the consumption is atm..
R