Here is some data on power use of the 130 liter model in my 2017 Grandby:
5.5 setting - 92°F at 8 PM, refrig went to 38°F, running continuously, 39 AH used in 12 hrs, 3.25 amp/hr average with 33-34°F minimum internal
This is with both an added in internal and external fan to help cooling.