The new plug and charging standard — known as J1772 Revision B or the slightly more memorable “Combo” — will be adopted by automakers throughout the States and Europe. It will allow EV owners to enjoy “quick charging” as public charging stations come online. SAE International worked with more than 190 automakers, suppliers and utilities to create the standard, which can handle up to 500 volts.
But first, a quick primer for the uninitiated. There are three ways to charge an EV. Level 1 uses a 120-volt line like your TV uses. Level 2 uses a 224-volt line like your dryer uses.