New analysis shows eastern US can handle 30 percent renewable electricity

http://arstechnica.com/science/2016/08/new-analysis-shows-eastern-us-can-handle-30-percent-renewable-electricity/

"both Hawaii and California have set targets of 50 percent renewable energy by 2030. But, in an effort to keep the pace, New York recently announced that it, too, would be aiming to get to 50 percent renewables by that date."

Still not enough, but getting the grid to handle such intermittent sources of energy may be the sticking point.