I pulled the batteries and have them stored in a closet indoors. Any need for a battery tender, or can I just assume they will need time to charge before next use?
I store my boat battery in my shop. All the others stay put. When it’s first put up, it has a full charge of 12.7 volts. I check it periodically and when it goes back it is still fully charged 6 months later. Been doing this for 6 years now. Only put a charger on it at the beginning.