If you want to be a satisfied electric vehicle owner, charging at home is a necessity, and when it’s a pure EV as opposed to a plug-in hybrid electric vehicle, 240 volts — which homes already use to power appliances like a clothes dryer, air conditioner or oven — are required to fill the larger battery pack in a reasonable period. For reasons we’ll explain later, we recommend 240 volts for a PHEV, too.
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When charging with 240 volts, commonly called Level 2 in the EV world, there are many potential choke points for power flow between the grid and your new car. Here are five main things that dictate how quickly your electric car adds range when you charge at home: