Solar batteries in the camper in 2023 are an excellent idea because you become completely independent of energy sources other than the sun. But where to find valuable advice on this matter? A thread at http://biznas.com/Biz-postsm205403_Have-you-tried-installing-a-solar-battery-in-your-camper.aspx#post205403 helped me. Here, I found a site that describes how to choose a battery for a camper!