Solar energy just provided more electricity in the United States than coal for the first time on record — marking a milestone for the rise of renewables in America. 

While gas and nuclear plants still lead the country’s energy mix, solar contributed 12.8 percent of the nation’s electrons in May, according to an analysis of government data by Ember, an energy think tank. Coal, meanwhile, provided just 12.2 percent. Just five years ago, solar was less than half of its current levels and coal was at 20 percent. 

“Overtaking coal for the first month on record shows just how far solar has come, from a niche contributor to the third-largest and fastest-growing source of power in the U.S. electricity system,” said Nicolas Fulghum, senior data analyst at Ember, in a press release. “From Texas to California, markets across the U.S. are betting on solar to meet rising power needs.”