If you have magic rectangles on your roof that turn sunlight into electricity, you probably want to make sure they get plenty of sun. You probably would go out of your way to make sure nothing else on your roof is casting shadows on them, right? But that’s pretty hard, on an RV roof. There’s not much space, and lots of other things up there to cast shadows. So what about little shadows? Exactly how much do you need to freak out about shading on your solar panels?
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