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"TYPES OF CHARGING

Level 1, or 120-volt: The "charging cord" that comes with every electric car has a conventional three-prong plug that goes into any properly grounded wall socket, with a connector for the car's charging port on the other end--and a box of electronic circuitry between them.

This is the slowest type of charging, although for plug-in hybrids with smaller battery packs (say 4 to 18 kilowatt-hours), it may be enough to recharge in a few hours to overnight.

The charging cord will test the circuit when you plug it in, to ensure that it's properly grounded and the current is strong enough to power the charger

Most have a series of colored lights that will indicate when or whether the car starts charging once you've plugged it into the wall, then into the car's charging port.

Level 2, or 240-volt: Most dedicated home and public charging stations operate at 240 Volts, with their cables again connecting to the standard charging port on your car.

If you have a charging station installed at home, it will require the same type of wiring as an electric stove or clothes dryer.

This will be at least twice as fast as Level 1 charging, often quicker, due to the higher amperage of the circuit.

At minimum the charging station should be installed on a dedicated 40-amp circuit, but if you want to future-proof your wiring, 50 or 60 amps is better.

Generally owners of battery-electric cars like the Nissan Leaf will require a Level 2 home charging station to provide overnight recharges.

Many plug-in hybrid drivers—including Chevy Volt owners—often stick with the standard 120-Volt charging cord for several hours during the night.

DC fast charging: Sometimes incorrectly called "Level 3" charging, DC fast charging uses direct current (DC) rather than household alternating current (AC) and is very high-powered.

This means that only public sites dedicated to DC charging, often along highways, are practical—given the higher cost of the utility having to install dedicated high-power lines.

Unlike the first two charging types, where every plug-in car in the U.S. uses the same "J-1772" socket (except Tesla, and even it provides an adaptor), there are three different kinds of DC quick charging.

• CHAdeMO: This is currently the most popular standard, used by the Nissan Leaf, Mitsubishi i-MiEV, and Kia Soul EV.
• CCS (Combined Charging Standard): All U.S. makers except Tesla and all German makers use this standard, including cars from BMW, Chevrolet, Ford, Mercedes-Benz, Volkswagen, and Volvo that are fitted with quick-charging ports.
• Tesla Supercharger: As usual, Tesla has gone its own way and created a dedicated network of free, high-powered fast-charging stations that can only be used by Tesla owners.
• Note that except for Tesla, DC fast-charging uses either a separate charging socket (CHAdeMO) or a larger socket that includes the conventional Level 2 socket (CCS). Not all electric cars have fast charging in the first place—only a very few plug-in hybrids offer it—so make sure you know whether your car has it, and if so, which standard it uses."

https://www.greencarreports.com/news/1098401_electric-car-charging-the-basics-you-need-to-know

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