As we move from the winter solstice to the summer solstice the sun gets higher in the sky. Our overhang above the south facing windows is 5 feet. This overhang acts like a giant window blind and keeps the summer sun from entering the house. This keeps our house much cooler and enables us to enjoy the hot summers here without the use of an air-conditioner.
In December the sun's rays penetrated to the back wall of the room. On a sunny day in the middle of winter the sun is sufficient to keep our house warm. No other source of heat is needed until the sun goes down.
By April the rays will just be along the edge of the windowsill. In September the rays will once again begin to creep back into the room as the sun's elevation changes.
The sun not only heats our house but it also energizes our batteries so we can live very comfortably off the electrical grid.
I just watched a video today on the future of road constructions. With today's technologies it is possible to build a road capable of supporting large highway trucks and have the ability to use solar power to provide homes with the electricity they need.
Check out the video at: Highways for tomorrow
These are exciting times to be living in.