http://www.plugincars.com/quick-guide-b ... 26875.html
It may surprise EV newbies to learn that an electric car’s charger is found on board the vehicle. It’s the equipment buried in the guts of the car that takes an AC source of juice from your house, and converts it to DC—so your car’s battery pack can be charged.
This fact doesn’t stop nearly everybody from calling the wall-mounted box that supplies 240 volts of electricity a “charger.” Actually, that box, cord and plug has a technical name—Electric Vehicle Service Equipment or EVSE—and if you have an EV, you’re going to want to install one at home.
So, it’s slightly misleading to say we’re providing guidance about chargers, because we’re really talking about buying an EVSE—which is essentially no more than an electrical device allowing drivers to safely connect an electric car to a 240-volt source of electricity. It’s not rocket science, and you should not overthink the selection and installation of an EVSE.
That said, there are important differences between the various home chargers (uh, I mean EVSEs). And there are a few best practices to keep in mind.