Wind and solar electric generation, including small-scale solar photovoltaics, reached or exceeded 20 percent of total generation in 10 states in 2017. Colorado is among the states with at least 20 percent of their generation coming from these two renewable resources. For the Centennial State and most of the other states, most of that electricity is coming from wind.
California and Vermont are the exceptions. California has more than half of its renewable energy coming from solar installations and Vermont has not quite half of its renewable energy coming from solar power.
Total annual generation from wind and solar in the United States in 2017 reached 8 percent for the year and peaked at 11 percent in April of that year.