Since its December 2010 launch, and just in time for “National Plug In Day” Sept. 28 and 29, the Nissan Leaf has now sold 35,000 units in the U.S.

Nissan will celebrate the milestone in Nashville, Tenn. with well-wishers and drivers of the all-electric car, and notes it is the first automaker to serve as a presenting sponsor of the event.

Actually, among mainstream-priced electric cars, Nissan stands heads above all other manufacturers in its financial commitment to proliferating electric cars.

Last year sales lagged, but Nissan began U.S. production in Smyrna, Tenn. this year and dropped prices on a mid-seasonally refreshed car while offering a base S Trim level for $6,000 less than the previous lowest price Leaf from 2012.

The company reports sales are up 317 percent year over year since the launch of the 2013 model range and beyond traditional bastions of EVs such as San Francisco and elsewhere in the west, Nissan reports new markets growing rapidly including Atlanta, St. Louis and Denver.

“From the early adopters to the most recent buyers, our owners consistently tell us that Nissan Leaf quickly becomes the car of choice in their household, and they spread the word about Leaf to their family and friends,” said Erik Gottfried, Nissan’s director of EV Marketing and Sales Strategy. “Nissan is sponsoring National Plug In Day to celebrate the growing presence of electric cars like Nissan Leaf and the role that our owners are playing in spurring the next round of EV buyers.”

Beyond Nissan’s celebration in its home state, National Plug In Day has expanded to more than 80 events in various U.S. cities

EV advocates are expected to show their support with EV parades, tailgates, ride-and-drives, live music and games according to Plug In America spokesperson Zan Dubin Scott, who launched National Plug In Day.

“Plug-in car buyers are not just motivated by environmental concerns “We buy plug-ins because they cost much less to drive, and they are just better, quicker, more fun cars to drive,” said Dubin Scott. “National Plug In Day brings together thousands of people across the country who already see these benefits and want to share the word with others.”