Solar panels for onboard battery winter storage I have four size 74 liquid cell batteries that are connected in series on my Mainship 30 and would like to attach a solar panel and controller to preserve the batteries with a trickle through the long winter storage season. Obviously a novice, I would like to know if I use a single solar panel (what size?) and a single controller (what size). Do I then just clip one cable to the positive post of battery #1 and the second cable to the negative post on battery #4?