https://www.entrepreneur.com/article/371922

If you were to have asked the experts 10 years ago about solar energy, many would have said that the odds were completely stacked against it: It was too expensive to implement, too niche to create any sort of market share, and though it might play a small part in the energy mix, it would certainly never become a main source of future energy. 

Fast forward to 2021 and things are looking quite a bit different than the world would have presumed. Over the last decade, renewable energy (such as wind and solar) has become the cheapest energy source available. It is more affordable to build and operate than coal, natural gas, nuclear and even hydro-power generation facilities. According to the Energy Information Administration (EIA), U.S. utilities generated almost 18% of their total power production in 2019 from renewable sources. This doesn’t account for the 35-billion-kilowatt hours of generation that came from small scale solar installations, such as those found on homes and businesses.