Proper Class C Storage

Your RV has alarms and appliance controls that draw current while your rig is parked, disconnected from "shore power" . You need to disconnect the "house" battery(s) using the auxiliary battery switch or physically disconnect the negative battery cable to prevent the battery from becoming discharged fairly quickly. House battery(s) will self-discharge in a few weeks even while disconnected. A "smart" trickle charger should be connected to keep the house batteries charged but no over-charged. Overcharging shortens life of batteries. It is wise to check level of electrolytes monthly and replenish with DISTILLED water using a "turkey baster" type battery filler if house battery is connected and aux batter switch is on and rig is connected to 110volt "shore" power. Letting electrolyte levels go below the battery "plates" will damage the battery(s)House batteries last around 4 years if maintained properly. A generator expert told me to run the RV generator with roof AC on for two hours per month to keep the generator and it's fuel system working properly. I just spent nearly $800 on new house batteries and extensive RV generator fuel supply system work. The engine starting batter requires similar care and maybe a smart trickle charger to keep it charged but not overcharged. Keep the tires covered when parked for long periods. The fridge should be as level as practical when running and rig is parked . Running off level in the driveway will shorten the life of the fridge. The water heater and fresh water system also require maintenances. RV ownership requires knowledge and periodic maintenance activity much like owning a cabin cruiser or an airplane. There are some good You Tube videos on RV maintenance and repairs.