Ok, here we go again ;-)
The existing system has been fine, no problems over 8 years of use, except a lackof capacity, so I'm leaning towards just replacing the red and yellow top optima's running through the NL system as it currently is (Optima's seem quite cheap bang for your buck?).
Then adding a third battery - a huge deep cycle battery to run the (new) fridge(?) and as a backup for computer use etc.
My solar panel has a regulator and a switch so I can charge any battery I wish - I'll change this to also be able to charge the new (third) deep cycle battery.
My trusty overland preparation barn says they will be rig the third battery up to the alternator to be charged when the alternator is running. So when the engine is turned on it will start charging the red top starter battery and the third deep cycle battery - then after 5 mins the NL system will flick over to allow the 2nd deep cycle to be charged as well.
Two questions:
Is charging 3 batteries too much for a standard Defender alternator?
What is the recommended option for the third deep cycle battery? Size isn't a problem, weight and cost are a little etc
Many thanks!
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