With the inverter and misc charging of phone, laptop or tablet there is always some small load (2-8ah). The battery bank normally gets back to 95-100% even after a couple/ few days of playing catch up but in this location it's been getting to 70% (350ah) by sundown and after the evening dinner, tv and morning breakfast/ coffee making the bank could be down to 35-40% (175-200ah).
That's what seemed odd to me that I wasn't gaining back the lost power after a couple days of heavy overcast and snow. The way I'm parked and the path of the sun is enough for the antenna shadow to stay on the panels a fair amount of the day.