640×508 Grid Parity to Reach 36 States in 2016, in Georgia solar breakeven, by John S. Quarterman, 30 November 2014,
Solar, Bloomberg, Tom Randall, Oct 29, 2014 7:52 AM ET
http://www.bloomberg.com/news/2014-10-29/while-you-were-getting-worked-up-over-oil-prices-this-just-happened-to-solar.html