Owen Comstock Wind was the biggest renewable power source in 16 states while solar was the biggest in seven states , according to the US Energy Information Administration ( EIA ) . Hydroelectricity remains the US 's largest renewable power source overall , accounting for 7 % of national electricity generation last year . Hydro power was the largest source of renewable electricity generation in 19 US states last year , down from 28 just 10 years ago , the EIA said .
Wind was the biggest renewable power source in 16 states while solar was the biggest in seven states , according to the US Energy Information Administration ( EIA ) . Hydroelectricity remains the US 's largest renewable power source overall , accounting for 7 % of national electricity generation last year . Hydro power was the largest source of renewable electricity generation in 19 US states last year , down from 28 just 10 years ago , the EIA said .