Last fall, Environment America issued a report looking at the top ten states from a policy perspective for solar power growth as of 2014. Those states included Hawaii, Arizona, Nevada (note that this state's ranking almost certainly has fallen sharply in recent months -- see here for more), California, New Jersey, New Mexico, Vermont, Massachusetts, North Carolina and Colorado. These states made the top 10 due to strong policies in the areas of solar net metering, Renewable Portfolio Standards (many with solar "carve-outs"), PACE and other means of creative clean energy financing, etc.