I also have front and rear Anderson plugs but do have all three batteries connected , crank is through a redarc isolator .
Dragged the camper out today and gave it a wash and repositioned the 200 watt solar panel to rear half of folding roof , noticed when the clouds were covering the sun I still had 14.1 showing on the meter and later when the sun was shaded by a totally shaded by a tree the reading was 14.2 so more than happy with that .