3 ms·

Kurzweil said their efficiency doubles every two years, and that they would be able to meet 100% of our energy needs by ~ 2030: http://www.livescience.com/4824

• teraflop 12y ago
  > Kurzweil said their efficiency doubles every two years According to that article, he said the "use" of solar energy doubles every two years. Efficiency has been gradually improving, but it's definitely not doubling every two years. Every few decades would be closer; that said, using an exponential curve to model a function that's capped at 100% doesn't really make much sense in the first place. http://en.wikipedia.org/wiki/File:PVeff(rev141113).jpg http://en.wikipedia.org/wiki/File:PVeff(rev141113).jpg