Will keep an eye on this thread, as in similar situation, tho already have a dual battery setup with a redarc, BUT it is the very basic one I think in that it runs of the alternator and chargers the 2nd battery, that's all it seems to do, given the second battery is cactus and would like to flick a switch or push a button to use as a starting battery just in case I think I will upgrade at some stage and completely re-wire the setup that's currently there that I bought with the patrol. I noticed a thin blue wire under the redarc that has a female joiner on it that's doing nothing except for hanging there so might have to investigate and find out what model redarc it is.