Dual Battery Setup

achtungbabi · Post by **achtungbabi** » 14 Jun 2021, 22:05

HI Everyone, first time Poster - 1 Hour lurker, from Melbourne Australia

I have a 2013 R Design and am wanting to install a second battery for running a fridge etc. Im comfortable with the wiring and isolation elements of this but am very curious as to where anyone has mounted the second battery? What brand, size and configuration did you use? How did you mount it etc.

Scenario 1 - The Ideal situation:

Ideally speaking, I would like to mount the battery and isolator near the main battery and then run two 12 Plugs on the passenger side near the console / drink holders in the rear.

Scenario 2: A workable solution

The option I have thought about is to mount the battery in a box and store in the cabin ( on a to be constructed removable platform board behind the fridge when its mounted) In this i would need to mount the isolator in near the main battery and then run wiring up to an Anderson plug in the cabin ( again on the passenger side) so that the second / auxiliary battery is removable.

Any thoughts, pictures, diagrams and the like are very much appreciated.

Post by **RickHaleParker** » 15 Jun 2021, 08:26

Relocate the battery from the center to one side and you will have space for the second battery right next to it.
There is space behind the corner panel where you can tuck away the Isolator.

achtungbabi · Post by **achtungbabi** » 15 Jun 2021, 16:59

Fantastic Suggestions Rick!

Have you done this or know anyone who has ?

I'd love to see the finished result!

Post by **RickHaleParker** » 15 Jun 2021, 19:42

achtungbabi wrote: ↑15 Jun 2021, 16:59 Fantastic Suggestions Rick!

Have you done this or know anyone who has ?

I'd love to see the finished result!

The people that add a house battery to a XC90 are few and far.

achtungbabi · Post by **achtungbabi** » 15 Jun 2021, 22:12

Why is it called a house battery?

Post by **RickHaleParker** » 15 Jun 2021, 23:19

achtungbabi wrote: ↑15 Jun 2021, 22:12 Why is it called a house battery?

Comes from Recreational Vehicles particularly Motorhomes. The battery used for household applications and not reserved for starting the engine.

The way you are going to use it, you do want to use a deep cycle battery for the house battery. Deep discharges will kill a starter battery in a very short time. The deep discharge battery will be more cost effective in the long run.