Here's solar back further: http://io9.com/solar-powers-epic-price-drop-visualized-510448484 http://io9.com/solar-powers-epic-price-drop-visualized-51044... Wh

Here's solar back further: http://io9.com/solar-powers-epic-price-drop-visualized-510448484 http://io9.com/solar-powers-epic-price-drop-visualized-51044... What we're meant to be comparing -- and I don't think that chart mean to lump all lng or all oil in together -- is that solar is now comparable to oil and/or lng in certain locations. Oh, and I don't think anyone anticipates efficiency gains in shale oil extraction comparable to the ongoing efficiency increases in anything silicon related.