According to my calculations (using US-only data from insideevs.com), Tesla has now sold more Model S than any other plug-in has sold over the last 12 months. This data also shows that Sept also marked the first time Tesla accounted for >20% of all plug-in sales in the US over a 12mo period (19.89% as of Aug). 1917 Model S 1834 Nissan Leaf 1127 Chevy Volt 907 BMW i3 761 Ford Fusion Energi 635 Ford C-Max Energi 485 Fiat 500e 455 Toyota Prius PHV 1448 Other 9569 Total Granted, as much as this is a reflection of the job done by Tesla, it is just as much due to the sharp declines of the Volt and Leaf, which are both being refreshed for 2016, but I still think it's an impressive feat. The Model S is now selling at nearly the same rate the Volt was at it's peak in 2013. Note that in this chart, the axis on the left applies to Total sales (including some models not plotted on this chart), whereas all other values are on the right axis.