Are you asking about dual battery set-up with an isolator?
So I've looked at all the write ups I can handle. I'm on a budget like $50 I have a battery already so I just need the solinoid. I'm good with wiring if I have something to fallow I just basically need a wiring diagram to look at. Thanks guys
I used this. "PAC PAC-200 200 Amp Power Relay" from amazon but that alone was $40+s&h. it was about $120.00 or so for everything including the relay, wire, fittings, fuses and fuse blocks. not sure how much of that you have laying around already. Check out my build thread for pics of the install.
Think I still have my old isolator. if I do, I'd let it go cheap ( I'll probably never get around to using it)
Have to check in a few days when I get home.