Once the bailiwick of tinkerers and hobbyists, electric vehicles are popping up all over Sonoma County as green-minded and tech-savvy drivers warm up to plug-in cars.
The market for EVs has expanded dramatically since December 2010, when the Nissan dealership in Petaluma became the first car dealer in the nation to sell the Leaf, the world's first mass market all-electric car.
Today, consumers can choose from more than a dozen all-electric vehicles, including two Tesla models and the top-selling Nissan Leaf, as well as plug-in hybrids, like the Chevrolet Volt, that run primarily on batteries but have gas-powered generators to extend battery range.
More and more are showing up on the roads in Sonoma County, which has the ninth-highest concentration of EV drivers in California, according to data compiled by the California Center for Sustainable Energy, which manages the state rebate program for electric vehicles.
"We have had a lot of early adopters here," said Alan Soule, president of the North Bay Electric Auto Association. "As people see them driving around, they are getting used to them. It's sort of a social thing. They realize they are economical and good for the environment."
June was a record month for EV sales. More than 8,000 cars that can be plugged into the grid were sold nationwide, up 160 percent from a year ago, according to the Electric Drive Transportation Association, an EV trade group.
The U.S. market began to slowly shift in 2000, when Toyota debuted the Prius, a hybrid that ran on both gas and electricity. Since then, automakers have introduced more than 60 different hybrid models in all sizes, ranging from large SUVs like the Chevrolet Tahoe to small cars like the Honda CR-Z.
Consumers who bought the first generation of hybrid cars are now adopting the all-electric technology, said Brian Wynne, president of the EDTA.
"A big percentage of people buying plug-in cars are hybrid owners," Wynne said. "What's going on here is a steady build of electric drives entering the marketplace. Hybrids are considered a mainstream product. Our goal is to make EVs a mainstream product."
North Bay Nissan of Petaluma was the top Leaf dealer in the United States in 2011, according to Ron Coury, e-commerce director for North Bay Nissan. The dealership has since sold nearly 500 Leafs and currently moves about 50 units each month, more than any of its gas-powered models, Coury said.