What to do when you are not camping for awhile

IF you have power to the storage area where the coach 'lives' during the winter hibernation. One of the neatest things I have found over the years is a Battery Tender. It keeps the battery up and will stop charging when the battery if fully charged. I have not tried it on multi-battery applications, but the system is still 12 volts. Our coach has 6 house batteries (residential fridge) and I try to be careful to keep the cells within limits with distilled water.