This will depend on a number of factors – eg. the type of electrical connection you have (single phase or 3 phase) or how fast your car battery can recharge to name a couple. However, as a car is mostly outside the home for long periods of time in the day and/or night, charging times are less significant. Not forgetting if you get a smart charger you can schedule your car to charge as often as you wish or to keep a certain % of battery charged up each day. It is recommended to charge to 80% of the battery capacity as it will reach this quicker. Like your mobile phone the last 20% of charging takes longer and is recommended to only be done if you really need 100% charge on the battery.