I use a solar charger for my 26' O'Day, which has two batteries connected to a Bat 1, Bat 2 or Both switch. I keep the solar panel connected directly to one of the batteries at all times but then have to physically switch back and forth between the two to keep them both charged. I recently read that when you set the battery selector to Both then the battery with more charge will drain into the other until they are at the same level. Is that correct and if so is this a way to move the solar charge into both batteries. Any other ways I should know about? Thanks!