![Chevrolet Bolt EV being charged outside Go Forth electric-car showroom, Portland [photo: Forth]](https://images.hgmsites.net/tmb/chevrolet-bolt-ev-being-charged-outside-go-forth-electric-car-showroom-portland-photo-forth_100606247_t.gif)
Plug-in vehicles, both battery-electric and plug-in hybrid cars, now represent slightly more than 1 percent of U.S. new-vehicle sales. That number is expected to rise steadily in future years, but cars with plugs will remain a rarity in many areas of the country for some time to come. Readers and followers of this site are presumed to have a...