Anytime you store your RV, such as during the winter months, the battery will slowly lose its charge if you don't take steps to prevent it. Cold temperatures drain RV batteries, as do "hidden" energy users like appliance circuit boards, clocks and LP gas leak detectors. To keep your RV battery in good shape, it needs to be kept charged.
Keep an RV battery charged during short periods of non-use with the battery disconnect switch. Just flip the switch to the "OFF" position. That way, the battery won't be drained by "hidden" energy users. Just remember to flip the switch to "On" before you use the battery again.
if you've parked your home on wheels during the cold weather, remove the RV battery. Use a battery charger to charge it up completely. Store the battery indoors, away from cold temperatures and in a well-ventilated area.
Keep an RV battery charged by keeping the top clean and free from dirt and grime. Otherwise, the grunge can conduct electricity and cause the battery to lose some of its charge.
Check the water level in an RV battery every month. To keep it charged and in good condition, the top plates need to remain covered. Add only distilled water, and only fill the battery to the "full" line.
Store the battery in an RV during short non-use times, keeping it charged with a multistage charger. Leave it plugged in all the time, and it will keep the battery fully powered.
Start the RV every couple of weeks while it's not in use. Allow it to idle and warm up to operating temperature to keep the battery charged.