TL;DR: The cost to charge an electric car depends on electricity rates, battery size, and whether you charge at home or at public stations. Home charging is generally cheaper, especially with off-peak tariffs or smart chargers, while public rapid and ultra-rapid chargers can cost significantly more. Larger batteries require more energy, and fast charging comes at a premium. Government incentives, like the EV Chargepoint Grant, can offset installation costs, and smart charging habits help reduce running expenses over time.
The cost to charge an electric car depends on several factors, including your electricity tariff, battery size, and whether you charge at home or use public stations. With more drivers switching to electric, understanding these costs is key to managing your running expenses.
Understanding Electric Car Charging
Before we get into the cost to charge an electric car, it’s important to understand how charging works. Electric vehicles can be charged at home or public stations using different charger types: Level 1, Level 2, and DC fast chargers. Each option varies in speed, cost, and convenience.
Charging at home is typically slower but more cost-effective over time, while public charging can offer rapid top-ups, especially with fast chargers. Most EV owners rely on a mix of both, depending on their driving habits and access to charging infrastructure.
What is Electric Car Charging?
Electric car charging is the process of supplying electricity to an electric vehicle’s battery to keep it running. Unlike petrol or diesel vehicles, EVs are powered entirely by electricity, which can be delivered at home or via public charging stations.
There are three main types of EV chargers:
- Level 1 Charging (standard 3-pin plug): The slowest option, typically using a household socket. It’s convenient but best suited for overnight charging or low daily mileage.
- Level 2 Charging (home or workplace units): A faster and more common method for home installations, requiring a dedicated wall box and offering quicker charging times.
- DC Fast Charging (public stations): The fastest and most powerful option, often found along motorways or in commercial locations. It can recharge a vehicle to 80% in as little as 20–40 minutes.
Factors Influencing Charging Costs
The cost to charge an electric car isn’t fixed; it depends on several factors. Here are the key factors that might change what you’ll pay:
1. Electricity Rates
Charging at home means you’re paying your local electricity rate, which can vary by region, time of day (if on a variable tariff), and energy supplier. Public charging stations may charge flat fees or per kWh, and rates can differ significantly between providers.
2. Battery Size
Larger batteries hold more energy, meaning more electricity is required to reach a full charge. A car with a 60 kWh battery will cost less to charge than one with a 100 kWh battery, assuming the same electricity rate.
3. Charging Speed
Fast chargers may be more expensive per session, even if they reduce wait time. Home chargers typically offer the most economical rate per kWh, while DC fast chargers are priced at a premium for the convenience of rapid charging.
Calculating Charging Costs
When getting an electric car, it is important to understand how much it costs to charge an electric car, which starts with knowing how electricity is priced and how much energy your vehicle uses. While the process is straightforward, rates can vary widely depending on where you live, how you charge, and the time of day.
Average Cost per kWh
The cost to charge an electric car largely depends on the price of electricity, which is measured in kilowatt-hours (kWh). The average electricity rate for households is around 28–30p per kWh, but this can vary by supplier, region, and whether you’re on a fixed or variable tariff.
Many energy providers also offer cheaper off-peak rates, especially through Economy 7 or smart tariffs, which can significantly lower the cost if you charge overnight.
Tips to find your local kWh rate:
- Check your electricity bill or your provider’s website.
- Use a smart meter or app to monitor real-time energy pricing.
- Compare rates using switching websites or energy comparison tools.
Example Calculations
To estimate the cost to charge an electric car, you’ll need two pieces of information:
- Battery size (in kWh)
- Electricity rate (in £ per kWh)
Here’s a simple formula:
Battery size × Electricity rate = Charging cost
Example 1:
Car with a 60 kWh battery
Home electricity rate: 30p per kWh
60 × £0.30 = £18.00
This means a full charge would cost £18.00.
Example 2:
Car with a 75 kWh battery
Off-peak rate: 15p per kWh
75 × £0.15 = £11.25
By charging overnight using a cheaper tariff, the same car would cost just £11.25 to charge fully.
Keep in mind that most drivers don’t fully deplete their battery before recharging, so real-world costs are often lower per session.
Also, public charging rates can range from 45p to over £1 per kWh, especially at ultra-fast stations.
Charging at Home vs. Public Charging Stations
When considering the overall cost to charge an electric car, it’s important to weigh the differences between home charging and public charging. Each option has its advantages, and the right choice often comes down to your driving habits, access to charging points, and electricity tariffs.
Home Charging Costs
Charging your electric car at home is often the most cost-effective and convenient option, especially if you have a dedicated home charging unit.
With a standard home electricity tariff, you’ll typically pay less per kWh compared to public charging points, particularly if you make use of off-peak rates.
Key considerations:
- Lower cost per kWh: average around 28–30p, or less with off-peak tariffs.
- One-off installation cost: home charging units typically cost £500–£1,000, with government grants or EV charger schemes sometimes available.
- Convenience: charge overnight and start each day with a full battery.
- Smart features: many home chargers let you schedule charging to align with cheaper electricity periods.
Public Charging Costs
Public charging stations are ideal for topping up on longer journeys or when home charging isn’t available. However, they usually come at a higher price per kWh, especially at rapid and ultra-rapid chargers.
Typical public charging costs:
- Fast chargers: 45p–60p per kWh
- Rapid/ultra-rapid chargers: 70p–£1+ per kWh
- Subscription models: Some networks offer monthly plans for reduced rates or free charging at selected locations.
You may also encounter:
- Connection fees or minimum charges
- Parking fees while charging
- Idle fees if the car stays plugged in after charging is complete
Incentives and Savings
While electric vehicles can offer lower running costs over time, there are also several government-backed incentives designed to make ownership more affordable.
These schemes can help reduce the cost of charging an electric car, particularly through support for home charger installation and discounted electricity tariffs.
Government Incentives
In this section, we’ll highlight any available government incentives or rebates for electric car owners that can help offset charging costs. We’ll provide links or resources for readers to check their eligibility.
One of the main incentives available to electric vehicle owners in the UK is the EV Chargepoint Grant, which offers homeowners up to £350 off the cost of installing a home EV charger. To qualify, you must have off-street parking and use an approved installer.
In addition, fully electric vehicles are exempt from standard Vehicle Excise Duty, helping to reduce ongoing vehicle running costs compared to petrol or diesel cars.
Tips for Reducing Charging Costs
While electric vehicles are generally cheaper to run than petrol or diesel cars, there are still ways to lower the cost of charging an electric car even further. With a few simple strategies, EV owners can make the most of their energy use and save money over time.
Use Off-Peak or Time-of-Use Tariffs
Many energy suppliers offer lower rates during off-peak hours, usually overnight. Scheduling your home charging for these times can significantly cut your costs per kWh.
Install a Smart Charger
A smart home charger lets you automate charging during the cheapest hours, track usage, and sometimes integrate with energy tariffs that reward efficient use.
Find Free Charging Points
Some supermarkets, shopping centres, hotels, and workplaces offer free EV charging for customers or staff. Apps like Zap-Map or PlugShare can help you locate free or low-cost public chargers nearby.
Avoid Rapid Charging Unless Necessary
Rapid and ultra-rapid public chargers are convenient, but they are more expensive. Use them strategically, such as on long journeys, and rely on slower home or destination charging whenever possible.
Monitor and Optimise Charging Habits
Avoid charging to 100% every time unless necessary. Keeping your battery between 20-80% can help preserve battery health and reduce unnecessary energy use.
FAQs about The Cost to Charge an Electric Car
How much does it cost to charge an electric car at home?
Charging at home typically costs between 28–30p per kWh, depending on your tariff and supplier. Using overnight or off-peak rates can reduce the cost further, making home charging the most affordable option for most EV owners.
Are public charging stations more expensive than home charging?
Yes, public chargers are usually more expensive. Fast chargers often cost 45p–60p per kWh, while rapid and ultra-rapid units can range from 70p to over £1 per kWh. Prices vary by network, location, and whether you’re on a subscription plan.
What affects the overall cost to charge an electric car?
The main factors are your electricity rate, battery size, and charging method. Larger batteries cost more to fill, and public rapid chargers typically charge a premium for convenience and speed.
Can I reduce the cost of charging my electric car?
You can cut costs by using off-peak tariffs, installing a smart home charger, taking advantage of free or low-cost public charging, and avoiding rapid charging unless you need a quick top-up.
Are there any government incentives to help with EV charging costs?
Yes, UK homeowners may qualify for the EV Chargepoint Grant, which offers up to £350 towards the installation of a home charger. Fully electric vehicles are also exempt from standard Vehicle Excise Duty, helping reduce ongoing running costs.