I remember my grandmother installed a solar panel system on her roof in the eighties. It was an investment in the tens of thousands of dollars. And I remember her worrying about the cost at the time. Yet, not even ten years later, she paid the whole system off and was enjoying electric utility bills under $20 a month...in Hawaii!
If you've ever lived in Hawaii and had to pay an electric bill, you know what I'm talking about. Needless to say, it's really expensive. Thankfully, the State of Hawaii is finally realizing the value of the natural resources surrounding the state. Abundant energy resources like wind, solar, wave, and geothermal are just there waiting to be utilized. And in the state which uses more oil for energy use than any other in the country, it doesn't take much to realize the smarter path.
This is a great video from Vice News about Hawaii's path forward to a sustainable future using renewable energy, and Tesla's involvement in that.