A review by the SUN DAY Campaign of mid-year data just released by the Federal Energy Regulatory Commission (FERC) reveals that the mix of renewable energy sources (i.e., biomass, geothermal, hydropower, solar, wind) is now 30% of total US electrical generating capacity. Moreover, June was the tenth month in a row in which solar was the largest source of new capacity putting it on track to become the nation’s second-largest source of capacity – behind only natural gas – within three years.