There are several ways you could wire them.
If you want to isolate the house electronics from the starting loads, I would recommend using a Blue Sea Dual Circuit Plus battery switch and connected the starting bank to one side, and have that feed the starter motor, and connecting the house bank to the other side and have that feed the main DC panel. Then you would want to have the alternator and other charging devices all connected to the house bank and use either an Echo Charger, Duo Charge or battery combiner to charge the starting bank when the house bank is being charged.
The other way to set them up is to connect the house and start banks to a 1/2/Both switch and connect all the charging sources to the house bank and use an Echo Charger, Duo Charge or battery combiner to charge the starting bank when the house bank is being charged. In this case, the house bank is not isolated when the engine is started and the "starting bank" is really an emergency starting bank, and the engine is normally started using the house bank.
Either will work fairly well. The one complaint of the Dual Circuit Plus switch is that in the case of a dead start bank, you risk killing the house bank if you put the switch in the combine position... Generally, the risk of killing the house bank when putting the switch in to the combine position is fairly low due to the size difference between the two banks, but if you're really worried about it, you can always wire a on-off switch into one or the other systems and use it to allow you to start off the house bank without combining batteries.
BTW, you really need to learn how your boat is wired. If you don't know this stuff, in an emergency, you could get royally screwed.
Originally Posted by cutterorient
Like I said I need help. I am inviting deserved punishment by answering I don't know how they are wired. I took it on faith to this point as there was never a problem and there are plenty - and I stress plenty - of other things to do on the boat.
The starter appears to be wired directly to the battery.
I guess maybe a better question is how should they be wired?
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
If you're new to the Sailnet Forums... please read this To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Still—DON'T READ THAT POST AGAIN.