dual battery setup

[jakestevens]

I have a 1976 mercury 650 outboard. I'm wanting to use a dual battery setup, one for starting and the other for the trolling motor. I would like for both batteries to charge while running, but I only want to start the engine on the starting battery. I have the circuit drawn up, I'm just not sure where to get the relay. Does anyone know of a supplier that has marine grade relays?

Also, what do you think of this setup?
Is it overkill?

thanks

 

[Silvertip]

Re: dual battery setup

You don't need a relay but rather a battery switch -- unless you are thinking ACR (automatic charge relay). Get it here on iboats. You do realize that you will need to run wide open for long distances to add any appreciable charge to the troller battery? Since we can't see what you have drawn up, I guess we can't comment.

 

[MexTex]

Re: dual battery setup

You may want to check out this site.

http://www.yandina.com/c100Info.htm