Slow – usually rated up to 3kW is mainly used to charge overnight at home or workplace.Takes 8-10 hours to fully charge. Fast – rated at either 7kW or 22kW and can usually be found in car parks, supermarkets, leisure centres.Takes 3-4 hours to fully charge. Rapid – typically rated from 43kW and found at motorway service stations, petrol stations, supermarkets.