If you are new to electric vehicles, charging speeds are one of the first things that causes confusion. Kilowatts, slow chargers, fast chargers, rapid chargers what does it all actually mean? Here is the plain-English guide.
What kilowatts mean
A kilowatt kW measures the rate at which electricity enters the battery. More kilowatts means faster charging. Think of it like water flow into a tank,the same tank fills faster with a wider pipe.
The four charging levels in practice
A standard three-pin socket delivers around 3kW , adding roughly 10 to 15 miles of range per hour. Functional for light daily use, not suitable as a primary charging method.
A home wall charger delivers 7kW, adding roughly 25 to 30 miles per hour. Eight hours overnight gives most drivers a full charge. This is the standard for home charging across the UK.
A public fast charger at 22kW adds roughly 75 to 80 miles per hour, useful at workplaces and destinations where the car is parked for a few hours.
A rapid charger at 50kW adds around 100 to 150 miles in 30 minutes. Ultra-rapid chargers at 150kW and above can add 100 miles in 15 to 20 minutes on compatible vehicles.
The important catch
The vehicle's maximum acceptance rate is as important as the charger's maximum output. A 150kW charger connected to a vehicle that accepts a maximum of 50kW will charge at 50kW. Always check the charging specification of the specific vehicle not just the charger.
