This probably isn’t the best answer, but here goes. My father-in-law is an electrician at a nuclear power plant, so he knows more than a bit about transmission, generation, and so forth. He told me it was completely impractical to use passive solar panels to heat your home, BUT he has them rigged up in the back yard to heat his water.
So, I’m afraid I don’t really have a solid answer, but I can suggest that you might want to be asking another question.
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