A detailed, city-level multivariate regression analysis of EV penetration in California has found a link between electric vehicle uptake and many underlying factors. A team at the International Council on Clean Transportation (ICCT) found that electric vehicle model availability; public electric vehicle charging network; local promotion activities for electric vehicles (e.g., outreach events, informational websites; electric car sharing services; and government and fleet programs) and median income in each city to be correlated significantly with new electric vehicle sales share. They cautioned that causality could not be determined within the analysis.
The team drilled into the activities of the 30 California cities with the highest rates of electric vehicle penetration, examining how local organizations—regional and city governments, utilities, businesses, and nonprofits are promoting electric vehicles through a wide array of activities. In these 30 cities, electric vehicles account for 6% to 18% share of new vehicle sales—this is 8 to 25 times that of the US average in 2015. These vehicle markets range greatly in size, from hundreds of electric vehicle sales up to approximately 4,000 (San Jose). . . .
Based on this analysis, we make three conclusions about the development of the electric
vehicle market in California –
Comprehensive policy support is helping support the electric vehicle market
. . . .
Local promotion activities are encouraging the electric vehicle market
. . . .
The electric vehicle market grows with its charging infrastructure. The 30 California cities with the highest electric vehicle uptake have, on average, 5 times the public charging infrastructure per capita than the US average. In addition, workplace charging availability in the San Jose metropolitan area is far higher than elsewhere. Increasingly, major public electric power utilities and workplaces are expanding the public charging network to further address consumer confidence and convenience. . . .
The article includes charts. The direct link to the study (1.14 Mb) is here: http://www.theicct.org/ev-markets-calif-cities-sept2016