We still have plenty to learn about electric vehicles and how Americans use them since the earliest adopters went green. From the start of 2011 to the beginning of 2014, the U.S. Department of Energy’s Idaho National Laboratory installed over 17,000 level 2 EV charging stations around the country and tracked the charging habits of over 8,000 plug-in hybrid and all-electric car drivers to assess the state of things. The study was the largest on EV infrastructure to date.