Originally Posted by Bolt
Does anybody know how Beneteau
wired up the 12v charging
circuit to 2x12volt batteries connected in series for the 24 volt winch
If it's the arrangement I am familiar with, you will have two or four 12V batteries up there in the bow. Under normal conditions, they are all wired in parallel through the relay box up there with them, and therefore are charged as your service
start batteries are, through dedicated charge splitters for each battery
bank (from engine alternator
, and from shore power
, depending if you are running or plugged in).
When you hit the windlass
button, the relays in the relay box change the connection from parallel to series. So if you have two batteries, you end up with 2 x 12V = 24V. If you have four batteries, you end up with two lots of 2 x 12V = 24V, and those two pairs are then paralleled to give you double the current
It is the same system as used with 24V bow thrusters on 12V boats.
I hope that helps.