I don't think it doubles the quantity of solar cells. I think it is a single cell that is reactive on both sides. I don't think they extend the shoulder hours I

I don't think it doubles the quantity of solar cells. I think it is a single cell that is reactive on both sides. I don't think they extend the shoulder hours I think it extends the overall surface area to gather more indirect light. Mounted over snow, water, white roof would be the optimal set-up.