[pairodice]

Thanks for the detailed explanation (which I will probably have to re-read 5 times to understand).
We just put in 6 (six) new AGM batteries that came from O’Reilly’s so not sure the brand but will do a search and see what they recommend for SOC. We have 4 8D AGM Deep Cycle batteries for the house (because we don’t boondock very often and for only one or two nights) and 2 8D Deep Cylcle AGM batteries for the engine. Not what I wanted at all but what the mechanics put in. So I can buy two more 8D starting batteries if that is better. I completely agree with you about not merging the batteries if using Deep Cycle and non-Deep Cycle (regular?) starting batteries. Would using all AGM Deep Cycles make a difference in what you stated earlier?
What meter can I add to show the SOC? I currently have a Freedom 25 (old) Inverter/Charger that seems to be working OK (although it does make me wonder whether the readings are accurate).