Do your inside window shutters just sit there? Are they just decorative?  Mine make power and are a part of my homes energy producing capability. South, East, and West facing are optimal. I think plastic or wood shutters that are just for decoration are stupid. You can choose any type of wood you would like and any color visible on the inside. When closed they not only block the Sun and reduce your air conditioners consumption. And make power. Here is an example of a product available today. Companies I am talking to are racing to produce better looking shutters that actually do something.

 

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richerSolar Shutters