Here are the five top sellers in the U.S. this year, with sales listed through August.
Chevrolet Volt: 13,497
Toyota Prius Plug-in: 6,082
Nissan Leaf: 4,228
Mitsubishi i-MiEV: 403
Ford Focus Electric: 169
Source: Auto companies, Autodata Corp.
Fisker Automotive says it has sold more than 1,000 Karma sports sedans in the U.S. since December but would not say how many were sold this year. Ford Focus Electric fleet sales started in December, but it was not in dealers until May.