Solar Foundation, Feb. 11, 2014, by Andrea Luecke, Executive Director and President of The Solar Foundation.
http://thesolarfoundation.org/blog/nearly-143000-and-counting-updated-state-solar-jobs-numbers-2013

"In late January 2014, The Solar Foundation released its National Solar Jobs Census 2013, showing that the U.S. solar industry employs 142,698 solar workers as of November 2013.  In addition to this important piece of national solar labor market research, we have also continued to focus more heavily on employment at the state level."