[tubman]

When I go to Florida for 6 months in the winter, I hook battery maintainers to all of my vehicles. I then run extension cords from each tender into a power strip plugged into a manual timer in the wall outlet. I have found that powering the maintainers on for just 15 minutes a day provides enough energy to keep them at full charge without risking overcharging the batteries. These timers are available just about any where and they are cheap insurance against overcharging.