Charging a 24 kWh battery pack as is used in the Volvo C30 Electric is expected to take approximately an hour and twenty minutes if you start with a completely discharged battery. Johan Konnberg, project manager of Volvo's special vehicles division, says that the aim of the CED project is to make it as "convenient as possible to own and use an electric car."
In inductive charging, a plate, which consists of a coil that generates a magnetic field, is buried in the ground. When a vehicle is parked above the plate, energy is transferred without physical contact to the vehicle's inductive pick-up. The energy that is transferred is alternating current (AC), which is then switched to direct current (DC) by the vehicle's built-in voltage converter, which in turn charges the battery pack.
[Source: Green Car Congress]