How much does it cost to charge an electric car at home? It’s a question many people have these days, and it’s a pretty easy one to work out.
Firstly, you need to know the real world, useable battery capacity of your electric car. That isn’t the stated number that the manufacturer gives you, these are always rounded up and don’t account for ‘spare capacity’.
To find your cars’ actual value, head over to ev-database.uk, where they list the actual battery capacity for each EV on the market.
So let’s take the current favourite electric car of the moment, the Tesla Model 3. The Standard Range Plus Model 3 has a real-world figure of 50 kWh of useable battery power.
Now you have that figure, find out how much your energy supplier charges you for electric.
Here we can see that my electricity charge with Shell Energy is 15.916p per kWh of electricity.
The next bit is simple math that even a child could do…
15.916 x 50 = 795.8
So, charging a Tesla Model 3 Standard Range Plus from 0 to 100% would cost you £7.96.
That equates to around 220 miles of driving.
If you want, you could also add your ‘standing charge’ for the electricity to that figure; here mine is 12.47p per day. Round that up and the full charge, including your standing charge, is £8.09.
Obviously smaller cars like the Honda e don’t have batteries as large as the Tesla 3, so will cost even less to charge.
It won’t always be that expensive though
The above calculations make the presumption that your electric car is empty, well that will likely never be the case. If you’re using it for short trips around town, then you’ll probably be charging from 80% or upwards.
If you let it run particularly low, then maybe you’d get home with 20% charge, if that were the case with the Model 3, then a charge from 20 – 100% would cost £6.37.
Some people have different tariffs here in the UK, like Economy 7, which can also be known as a multi-rate or differential tariff. You could pay up to 30% less for energy usage in the 7 ‘overnight hours’ depending on your electricity provider.
How does charging your electric car at home compare to petrol or diesel?
If you were getting 35 MPG in your petrol car, that same distance would cost you £34.18 if the petrol price was 119.6p per litre.
40 MPG lowers that to £29.90
In a diesel car (with higher MPG) 220 miles at 58 MPG costs £21.21.
A diesel car would have to achieve 155 MPG to cover that distance and cost just £7.94, whereas petrol would have to be capable of 150 MPG to squeeze in at £7.97.
You can make your own calculations based on the current MPG your car shows on the dash and the last time you filled up with fuel by using the fuel-economy.co.uk calculator here.
Confused.com also have a great fuel price checker for your area in case you can’t remember also have a great fuel price checker for your area in case you can’t remember how much your last fill-up was per litre.
As you can see it makes far more sense on a monetary scale to charge your electric car at home, next up we’ll look at how to install an electric car charger at home.