Brings up a point....a one-axle tow trailer. But that's for another thread and maybe even for another forum :)
I thought the question about the battery, dealt with constant current. With constant voltage the value is known beforehand, with current, it takes an algebraic know-two-values-to-arrive-at-the-third sum. In this case it was a constant current source a solar panel - how many amperes or fractions to maintain a couple of group 24 batteries.
Shore power battery maintainer selection is easier than selecting an uncontrolled solar panel via wattage...
