The last change to our setup was in July 2017, 4 years ago. It has been possible to stay boondocking only using the Propane for heating on cold days.
90% of the days is a full charge reached on the batteries as the graph below shows.
We daily use 10 kWh for regular usage. But we can run Aircondition and other high loads too. We have even in the summer connected other RV's to the battery bank in the trailer.
This YouTube video has more details and explanations.