Last weekend I did some timing on mine.......30 deg outside.....van under dappled shade.....fridge set at 4 deg....cuts back in at 7deg.....compressor runs for 20mins.....idle for 15mins.
This is with an external controller that runs it from a probe mounted near the back wall . I found run times were worse with the original thermostat controlling things.
I don't have a winter kit, but yes, the freezer will defrost a bit at temps approx 10 deg or colder. I still haven't seen an explanation of how the winter kit works, because if you run the fridge longer in cold temps to keep the freezer cold, the stuff in the fridge will be colder as well, so stuff may start to freeze in there ??