Electric Cars for Everyone? Not Unless They Get Cheaper.

The people here are not Hollywood stars or billionaire tech entrepreneurs who might own Ferraris and private jets. But they are well off. The median household income in the area exceeds $165,000, and half the homes are valued at more than $1 million. Eight in 10 residents have at least an undergraduate degree. As early buyers with high incomes, they can easily take advantage of the federal E.V. tax credit.

The incentives are, in effect, “subsidizing my luxury,” said Mr. Teglia, who also has solar panels on his home. The Model 3s he owns sell for about $40,000 before government incentives.

Dr. Jack Hsiao, an obstetrician-gynecologist, had avoided buying an electric vehicle for fear that he wouldn’t be able to drive very far before having to plug in — a phenomenon known as range anxiety. But his sister, who moved to California from Texas and bought solar panels and a Tesla, persuaded their father, who lives with Dr. Hsiao, 54, to buy one, too. Following his family, Dr. Hsiao bought a Tesla and solar panels.

“Gas prices have just gone through the roof, and so, given that I’ve got the solar panels, it cost me next to nothing to charge,” he said. “For me, it was just a perfect fit.”

Elaine Borseth, a retired chiropractor, is another convert. Before she bought a Model S, she had never spent more than $20,000 on a car. But after seeing several of the big, sporty sedans on the road, she drove one about seven years ago. “I thought they were sleek and sexy,” said Ms. Borseth, who now runs the Electric Vehicle Association of San Diego.

“It’s almost one of those cases where the more you see, it just kind of breeds upon itself,” she said to explain why her neighborhood has so many electric cars.