That depends on how far the battery has been discharged and what source is being used to charge the batteries. REV offers 110v or 220v charging solutions, with which a full charge can be achieved in as little as 2.5 hours. However, an electric car is a bit like a cell phone: it does not matter how long it takes to charge as long as a charge lasts all day. You plug it in when you get home, and unplug it when you leave in the morning.
Unlike EVs of the past, modern electric vehicles have a built-in battery charging system that can basically plug into any outlet. Many also have an optional mobile charging kit that allows you to charge from any available electrical outlet (110V or 220V) wherever you happen to be.