. Interesting Data regarding the need for a US EV charging infrastructure.

40 percent of U.S. residences don't have even a carport, much less a garage, in which a plug in vehicle can recharge overnight. According to government statistics, there are 247 million cars in the U.S. today and only 54 million garages. Garages are most frequently lacking in dense urban areas, the very places where a medium-range electric vehicle is an ideal solution for personal transportation. For example, in San Francisco only one in six cars is parked in a private garage. In suburban areas, people living in apartment complexes and condominiums also need a place to "plug in." In addition to the lack of garage access, the limited electricity-only range of early plug-in vehicles will prompt the desire for drivers to "top off" their batteries when away from their normal overnight charging location. Prospective plug-in car owners want the assurance that they can charge their vehicles while at work, shopping or parked anywhere away from home "just in case." Recent studies of drivers of early custom and "kit" electric vehicles confirm this behavior.