How much does it cost to charge an electric vehicle?
It should cost less to run an electric car than a petrol or diesel one, but exactly how much does it cost to charge one up?
Electric cars are quieter, faster and more relaxing to drive than petrol or diesel cars, but the most important benefit in many people’s eyes is that they’re much cheaper to run. That’s before taking into account the clean-air zones starting to appear in cities around the UK (not just London), which charge petrol or diesel drivers to enter them. With growing concerns about pollution, for many new-car buyers, the time has come to consider changing to electric.
But exactly how much does it cost to charge an electric car? There are multiple ways to charge at home or using a public charger and the costs vary. The cost depends on a number of factors, including where you charge, when you charge, your car’s battery size, how much charge you need and what speed you use to charge.
Here, we’ve detailed everything you need to know about charging your electric car, estimated costs and what to expect when charging.
Cost of home charging from a domestic socket
One of the key upsides to owning an electric car is the ability to charge it at home. You’re likely to find it makes sense to get your car ready for the next day’s driving by charging at home most of the time, since you’re there every night. The government’s ‘Go Ultra Low’ campaign calculated that 90% of electric-car charging is done at home.
While it’s not recommended you do this all the time, it is possible to use a conventional three-pin plug to charge an electric car, but most owners install a wallbox charger. These are around twice as fast as a domestic socket and are usually fitted on an outside wall of a house, to make charging on the driveway easier.
There’s no installation cost to using a three-pin plug, as you just need to run a cable – usually included, but not always – to the nearest socket. Yet this method of charging is the slowest possible and manufacturers recommend that you only use it if it’s not possible to use a wallbox, such as when visiting a friend’s house.
At a typical maximum current draw of 3kW, most electric cars will take many hours to charge fully, so the process is best carried out overnight. However, not all plugs can draw this amount of current – and manufacturers recommend not using a domestic socket as your sole charging outlet. It's better to see it as an emergency backup option.
The average electricity cost in the UK is just under 19 pence per kilowatt-hour (kWh). So, using a 3kW charger to fully top up a Nissan Leaf with a 40kWh battery would take 13.3 hours, at a cost of approximately £7.60. With the Nissan’s quoted range of 168 miles, that amounts to around 4.5 pence per mile.
For a rough comparison, a typical petrol car costs nearly 16 pence per mile to run, making an electric car much cheaper. However, because electricity is cheaper during off-peak times – such as the night – with an average price of 11 pence per kWh, a more representative cost of charging the Leaf overnight would be between £4 and £5.
Cost of home charging from a wallbox
Sometimes, a slow overnight charge isn't convenient, which is why many choose to install a home wallbox in order to charge faster. A typical home charging unit can supply power at between 3 and 22kW, although most operate at 7.4kW. The costs range drastically between brands but, as an example, a 7kW home charging unit from Pod Point will cost £859 to purchase and install. It’s worth shopping around, though, as other companies can supply 7kW home charging units.
A 7kW home charger significantly reduces charging time, with little change in the cost of electricity. A full 168-mile charge for a 40kWh Nissan Leaf would take less than six hours, vastly improving convenience for those occasions when you need to top up in a hurry. Over a year and 9,000 miles, there are significant savings to be made with an electric vehicle versus its petrol equivalent.
At an average of 45mpg fuel economy, a petrol car will cost £1,580 a year to run in fuel alone. A 40kWh Leaf with a real-world range of 168 miles would cost £450 for the same 12 months. It’s also worth noting that you can save even more by investing in solar panels and a household battery to generate and store your own electricity.
Cost of charging at public charging points and motorway services
The cost of charging at one of the UK’s thousands of public charging points depends on the one you visit. Various charging networks run different charging stations, each with their own pricing structure. The largest network of public charging stations in the UK is BP Pulse, with over 8,000 points across the UK. A subscription costs £7.85 a month, with new joiners getting the first three months free.
Prices start at 28p per kWh for subscribers, with faster 43kW and 50kW chargers costing 32p per kWh and 150kW units costing 38p per kWh. You should check what your car’s fastest charging rate is, however – there’s no point paying the 150kW rate if the car itself can only charge at 50kW maximum. A subscription isn’t necessary to use BP's points, but you face higher ‘pay-as-you-go’ tariffs if you don’t have one.
Other major UK networks to look at include Osprey (40p per kWh), MFG (39p per kWh), Shell Recharge (39p per kWh), Gridserve (30p per kWh), InstaVolt (45p per kWh) and IONITY (69p per kWh). You can use Zap-Map’s website or app to find the nearest locations to you, and see the most up-to-date pricing information.
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