Lithium batteries 100 Ah with charging booster 30 Ah, additional double USB socket at the rear of the bed, double USB socket and 12 V socket under the dinette wall unit, higher drawer walls, double floor in the rear garage with access box from the kitchen for tinned food and 1.5 l bottles, double floor under the bench seat for tools and small utensils, shelf for washing-up utensils and kitchen roll as well as bar with hooks above the kitchen unit, optimized after 6 years of use