“According to GTM Research’s Utility PV Market Tracker, as of August 2016, there are 11 states with 500 megawatts or more of PV projects in development and a total of 20 states with 200 megawatts or more under development.”

https://www.greentechmedia.com/articles/read/heres-where-utility-scale-solar-is-thriving-in-the-united-states