I've been working on the wiring plan for my Ford Transit van conversion. I'm not an electrical guy and I've been following on the coat tails of others in developing this diagram. The unique part of my plan is the addition of a 3-way switch after the SCC to be able to select solar charging of the house batteries OR the start battery (mainly for when the vehicle is sitting for a long period of time). However, this benefit will come with the inconvenience of having to reconfigure the SCC from charging a lithium battery to an AGM battery. I believe this set-up will work, but I haven't seen it done before. Anyway, any overall input or guidance to obvious issues in the diagram would be much appreciated.