From October 1st, 2018 to September 30th, 2019 has our solar panels generated 3050 kWh (Daily average 8.4 kWh or ~700 AH @ 12 Volt). We have never had a need to run our generator and has never been plugged in. The longest stretch between full charges was 8 days in January where we were parked partly in the shade from some large trees. Our lowest State of Charge was 39% in February during multiple days of rain.
During the summer has other RVs been plugged into the trailer with the external power line like at a pedestal in an RV park. We had to set the fridge and water heater to propane only to not drain the batteries overnight, but else was nothing changed. During a drive from Bend, OR to Silverton, CO was it necessary to run the air conditioner while driving. Those days were the records with 25 kWh produced from the solar panels. We also had a problem one of the days to reach a full charge after running the air condition overnight at very hot temperatures.
The Solar and Battery setup has now worked almost untouched for 2.5 years and I cannot measure any degradation of the Tesla batteries. The way we use the Tesla modules is so gentle (compared to in a car) and keeping the temperature high enough to ensure charging without damage even when freezing outside. Lowest Battery Temperature was 15 Celsius (59 Fahrenheit) and the highest 37 Celsius (100 Fahrenheit).