You know what, maybe I'll just connect the aux battery with an isolator relay to the alternator positive cable in the trunk.
It's a 180amp alternator.
This should make life easier.
Thanks for all your help

Awesome, thank you.
Well dont plan on using an PV panels. I just want to use the cc for isolation and I feel that it will create less load on the alternator.

Well I am looking at the solar CC on Amazon, Input is 12v and the output is 12v. I was thinking that I could wire the input to my starter battery and wire the output to my aux battery. The aux battery I'm planning on using is a 105amp marine deep cycle. Thank you in advance for all your help. https:...

Just wanted to make sure that the alternator could handle charging the aux battery once the isolator is on. Based on what you wrote above. Your biggest concern would be mismatched battery capacity. You might want to look for a Charge Controller has a 12V generator input. That way the capacity misma...

Thank you for the replies and I'm glad to be here.
Just wanted to make sure that the alternator could handle charging the aux battery once the isolator is on.

Hello everyone, I'm looking to do some camping with my 2008 xc90 and would like to install a dual battery system. The second battery will be a deep cell. Is it an easy system to setup with that VSR isolator or have a DC to DC charger. Wiring is not an issue, I just want to make sure I won't be damag...