great passive solar design- I would plant row of deciduous trees in front of glass so that in the winter that could act as a giant trombe wall but be shaded to keep it cool in the summer. Trees that max out at 2 stories would allow south face 3rd level roof to accommodate panels!
When you think "solar", you may first think about those expensive panels designed to create electricity. We are talking about a completely different solar panel. Our solar heating panel is designed to heat air, not create electricity. Other designs include heating liquid.