Thread: Duel battery set up

Go to the bottom and search... Defender dual battery..

May want to use *dual* rather than duel though - don't want those batteries fighting each other

Are you talking about Amp Hours, or Cold Cranking Amps?
My guess is the former.
There is plenty of offerings out there in regards to dual battery controllers / charging relays, so I guess you might be more after some details on the best batteries which compromise between CCA and Ah.
Will you be running with a winch or just to get extra capacity for camping, running a fridge etc?

Originally Posted by Tombie

Go to the bottom and search... Defender dual battery..

May want to use *dual* rather than duel though - don't want those batteries fighting each other

PMSL at Tombie!

I fitted dual Optima yellow top AGM batteries. They sit cross-wise, with a plywood packer underneath (I think 12mm) so they can extend over to the slightly higher part of the floor. I don't think you can do much better in terms of capacity but they are not cheap. At times when I am doing a lot of local short distance driving, I top them up once a month with a 240v Ctek charger to make sure they remain fully charged.

Hi Fatcat,

I also used the Optima yellow tops. I feel they give a good balance between CCA and AmpHours. Had them in for two years now - and no issues.

Here is a link to my install which may give you a few more details/ideas.

Dual Battery Install - 2013 110

cheers,

Wayne

What's wrong with the standard Land Rover battery, optimas are are close to 300bucks why is everyone buying two of them?
I've got a yellow top paired up with my standard LR varta battery no problems.

Originally Posted by jackdef90

What's wrong with the standard Land Rover battery, optimas are are close to 300bucks why is everyone buying two of them?
I've got a yellow top paired up with my standard LR varta battery no problems.

I had several Optimas. They dont last any longer than say a good "chinese" copy. Ive been using several Fullriver batteries for 5 years, none have had an issues. (boat, 4x4) The Optimas (mbike and 4x4) were ok. Actually the optima died before the chinese!

I'm not sure how you fit in an Optima with the standard battery. However in any event, it is not really ideal to have an AGM in parallel with a wet cell battery and I over-ride the isolator with a battery switch to sue two batteries for winching.

My installation is almost identical to Willow 4's. Yes, it is expensive.