Rooftop solar will be at grid parity in all 50 U.S. states by 2016http://www.treehugger.com/renewable-energy/rooftop-solar-power-will-be-grid-parity-50-us-states-2016-says-deutsche-bank.html by IB885588 • 12 years ago 3 0 12 years agoTRtreehugger.com