Electric vehicles achieved their highest-ever U.S. market share in January, according to Cox Automotive data, despite volume down from a holiday season spike in December.

EVs reached 9% of new-vehicle sales last month at a little more than 102,000 units, up a dramatic 30% year-over-year and the 10^th consecutive month at more than 100,000 units, Cox said. December marked the highest volume historically.

Used EV sales also jumped in January, according to the Cox data, up about 4% month-over-month and 31% year-over-year to nearly 27,000 units or the second-highest volume historically. Their market share was about 2%.

Supply of new EVs rose 5% month-over-month to 87 days, though that’s down 35% year-over-year, indicating better turnover, Cox said. 

Meanwhile, used EV supply fell 3% month-over-month and 23% year-over-year to 45 days. Cox says their better affordability, tax incentives and battery warranties likely help move the used units. Their average listing price last month was $37,476, down 5% year-over-year, while the average transaction price for a new EV was $55,614, down just 1% year-over-year.

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