The past ten years, solar rooftops for sustainable homes and lifestyles are more the common than the oddity. What many people don’t know is that this technology was available since WWII with solar-powered satellites used by NASA and passive solar heating systems.

But getting this active solar system into the mainstream of residential homes has been challenging at best, partly because of expense and partly because of ignorance. There are voltaic cells that convert sunlight into electricity and this have been an expensive and prohibitively technology, but it is coming down to more affordable costs.

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