I assume the second battery under the bonnet is indeed a leisure battery, I have seen several other topic surrounding life of the leisure battery, what runs from it and when and how long it runs on a charge etc. but I have a couple of questions I can't seem to find the answer for:
I have seen several conversations surrounding split charge relays, but surely with a leisure battery fitted as standard this already exists? What are the benefits of updating?
Also, assuming there is a split charge relay fitted, is it possible to fit a ZIG unit to monitor the charge in each battery to avoid running it flat and if so does anyone have any experience on best locations, ease of fitting etc?
I don't plan to ever convert my van with a kitchen etc, I have reversed the seats (the 'correct' way so I can still make a bed) and this is sufficient as I like this set-up... does anyone have any other ideas of ways to improving the already superb set-up in these lovely vans?
thanks for reading

D