EV charging stations explained

Thankfully, the UK’s charging network is better than ever and constantly improving. From electric car charger home chargers to supermarkets offering free charging while you shop, we’re here to help you figure out charging up both at home and on the road.

There's a very easy to remember equation to work out your approx. charge time;

Battery size (kWh) / Charger power (kW) = Charging time (hours)

However, it's also not an exact science with other factors to also consider when working out how long to charge for, these include:

• how many miles do you need to travel between charging events? (most EV manufacturers recommend that where possible an EV battery should operate between 20% to 80% charge)
• how much charge your electric vehicle has already when you plug it in
• local factors at a public charging station, such as the number of chargers being used at once
• outside temperature and your EV battery temperature

How do you charge an electric car at home?

Typically, home charging happens in one of two ways. Firstly, there’s slow charging, where you can plug your EV into a regular 3-pin plug socket. With a maximum charge speed of 3kW per hour, this means you can charge something like a MG4 EV Long Range which has a 64kWh battery in around 30 hours., when charging from 0% to 100%.

Having the option of using a 3-pin plug can be useful on occasions but at DriveElectric we do not recommend that you use a 3-pin plug socket as your main recharging option at home.

Instead, we recommend that if you have off street parking at home then a professionally installed home charger is by far the best way to recharge an electric vehicle. In most cases in the UK, this provides around 7kWh of power. Using the same MG4 EV Long Range with its large 64kWh battery a full charge from 0% to 100% takes around 10 hours. Significantly faster than a standard 3-pin plug.

There are other benefits of using a dedicated home charger, such as:

• Ability to pair up other low/zero carbon technologies such as solar panels and/or home battery
• Ability to monitor and manage your charging via the smart chargers' phone app
• Ability to use variable/flexible electricity prices from energy providers (i.e. take advantage of cheap overnight electricity tariffs)

It is probably also worth pointing out that it is very rare that drivers need to recharge from 0% to 100% consistently, instead EVs are usually kept in the 'sweet spot' of having between 20% and 80% charge, with drivers topping up their EV overnight while they're asleep!

Sometimes, however, it’s not possible to have a home charging point, while if you’re going on a long journey, you’ll need to find somewhere along the way to plug in.

If you’re wondering how to charge an electric car away from home, it’s time to get acquainted with the UK’s thriving public charging network.

How much does it cost to charge an electric car?

Charging up at home is usually cheapest and certainly the most convenient, and there are lots of energy tariffs you can choose which are aimed at EV drivers. These offer low off-peak electricity prices for charging overnight, while more and more companies are able to provide renewable energy to continue your good work in protecting the environment through driving an EV.

The cost of installing a home charge point varies depending on the brand of point and the installation fee, but the RAC estimates that on average it comes in at around £800. The UK Government has provided a grant (of up to £350) for the installation of a home charger, however for house-homeowners this scheme ended in March 2022. For people that own or rent a flat, or house renters then a very similar scheme is still available.

The way to work out how much it costs to fill your battery up is to find your electricity bill and look for a pence per kWh figure, once you have this you can simply multiple that figure with the size of battery in your electric vehicle.

Public charge networks have their own different charging models, most based on the same pence per kWh. This makes it easy to compare public charging costs against different networks and compared against charging at home.

Some operators allow for a simple 'tap and go' approach to payment where your bank card is used to enable and pay for a charge, while other providers ask you to have an account before enabling the charger.

Our advice is always to plan ahead and ensure that you can access the public chargers you're planning to use.

Why doesn't my electric car charge faster?

Not all electric vehicle are capable of charging at the same speed of charging, for example;  The Volkswagen e-golf has a max Charging speed of 40kW – so it will take the same amount of time to charge on a 50kW, a 150kW or a 350kW hour charger.

A good rule of thumb is that the newer the electric vehicle, the higher capacity it can handle. Newer Volkswagen ID models, such as the ID.4 or ID.5 can handle over 100kW of power. The Kia EV6 can take up to 233 kW of power, making it one of the fastest charging electric car available today, under the right conditions the EV6 battery can go from 20% to 80% charge in only 16 minutes.

But these fast charge max power figures that doesn't tell the whole story, other variables at play include how warm the car battery is, for optimal charging the battery should be warm and not cold. The existing charge in the battery also impacts charging speed, as all carmakers use sophisticated technology to protect the battery from overuse.

Finally, the public charging site will have a maximum load capacity, so if you're using a busy hub site then you might experience a charge rate under the advertised rate.

It is worth noting that given all these variables, an electric car driver will often find the same public charging location will provide a different amount of power to the vehicle each and every time it is used.