Bought my used camper last year and a solar panel was already installed when I got it. My last camping trip I ran the heater overnight for two nights with no problems and was camped under trees so do...
Batteries were not considered full charge yet by the controller. Maybe they are full charge. Some controllers will drop to float immediately when a set voltage is reached. Some will hold the set voltage 2+ hours before dropping to float. The best controllers adjust the hold time based on charge level.
Does the manual shed any light on the actual charging profile?