This is what I have, no battery or charger. Please can someone show/provide instructions on how to fit charger, battery and type of battery, used for fridge, lightingand charging things. ( please use simple language as if speaking to a moron and no abbreviations)
Thanks for any help
I'll preface by saying that if you aren't comfortable with this stuff, please, take it to an experienced workshop and let them handle it.
The charger and battery you choose requires further assessment into requirements, budget, and level of complexity that you are comfortable with.
On one hand, just doing a CTEK SmartPass 120S and an standard battery would work for some people. Beyond that something like a Blue Sea ML-ACR would work and allow push button jump starting (and forced isolation) assuming both batteries have identical charge profiles.
If using a lithium battery (or technically even an AGM since the charge profile is slightly different than EFB), it would be more advantageous to go with a DC-DC charger. Options there include the Redarc BCDC, Victron Orion series, etc.
For storage capacity of the battery, remember that a lead acid (standard, EFB, or AGM) has roughly a 50% discharge floor; effectively you can discharge the battery to 50% before you start irreversibly damaging it and decreasing capacity/output. For a lithium battery, those have a 10% discharge floor (so they are capable of safely using ~90% of their capacity). This varies slightly from battery to battery, but are safe numbers to work from. What this translates to is that the factory auxiliary battery has 105Ah (amp-hours) capacity, but can only utilize around 52.5Ah (we'll call it 50Ah for simplicity). A lithium battery that is rated at 60Ah would actually have more usable power capacity than the factory aux. battery in this case.
While not inexpensive, a number of lithium batteries also are now available in
very dense configurations for capacity. One of the most dense includes the Victron 200Ah (12v) LiFePO4, which John @ Agile Off Road has just installed in his Grenadier. Additionally the Dakota Lithium 135Ah (I just installed this one) fits in just the size of a Group 24 battery (notably shorter in length, but slightly taller than the original auxiliary battery).
The short answer to your question is that there is no truly short answer, at least not if it is to be optimized and ideal for you personally.
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