This year's top-selling plug-in electric car in the U.S. comes as no surprise. Based on our estimates, Tesla has delivered a whopping 55,882 Model 3 sedans for 2018 through August. There's really not much more we can say about Model 3 sales. As far as EV sales go, it's in a league of its own. It's also making waves in regards to U.S. car sales as a whole.