The natural Ecosystem functions with Sun as its only source of primary energy. We could do well to take a leaf out of Nature’s book. The technology to harness the power of the Sun, which is essentially free, into electricity and heat has been the focus of development in the last few years.
The good news: A large part of our activities take place during the day, when the Sun is shining. And the Sun is always going to shine. With new technology coming slowly into the mainstream, you can even harness the power of the Sun sitting inside your house; using it to power your devices such as your cell phone, laptops, etc.
A UK Company, G24 Innovations has recently set the new world record for such technology, called Dye Sensitized Cells. They are on the way to help us make the proverbial Hay (Energy) while the Sun shines.