 For the third consecutive year, the Tesla Model S was the top selling plug-in car with about 26,500 units sold in 2017, followed by the Chevrolet Bolt (23,297), Tesla Model X (~21,700).Sales in 2018 were led by the Tesla Model 3 with an estimated 139,782 units delivered, the first time a plug-in car sold more than 100 thousand units in a single year.Ranking next were the Toyota Prius Prime (27,595) and the Tesla Model X (~26,100).