Critique this dual battery set-up

[smartazz19]

I know this has been cover a hundred times, but i hardly see any actual diagrams out there. What do you guys think about this set-up. I am adding a second battery and want to use it like an "emergency" battery. So i want to keep it fully charged, thats what the isolator is for. But i also want to have the emergency "2" battery completely separate, and only used if i hit the switch if i need a start, hence the need for the perko switch. I will be using two identical batteries. What do you think??

Thanks for any input.



Switch i want to use..


Type of isolator i want to use:

[Wakebrad]

Looks good to me.

You could use different types of batteries (one deep cycle, one starting) if you never put the perko to "All"

The only reason you would want that is to isolate your starting battery from your stereo battery.