7.4kW vs 22kW EV Chargers: Which One Is Right for You?

As electric vehicles (EVs) continue to grow in popularity across the UK, choosing the right home EV charger has become more important than ever. Two of the most common charging options are 7.4kW and 22kW EV chargers.

But there is an important middle ground too: 11kW charging.

While higher power can mean faster charging, the biggest charger is not automatically the best one. Your EV's onboard charger, your home's electrical supply and the amount of time your car spends parked all affect how much charging power you can actually use.

In this guide, we'll compare 7.4kW, 11kW and 22kW EV chargers to help you understand which option makes sense for your home and your driving routine.

What Is a 7.4kW EV Charger?

A 7.4kW EV charger is a dedicated home charging unit capable of delivering up to 7.4 kilowatts of AC power to your electric vehicle.

Compared with a standard domestic three-pin socket, which typically provides around 2.3kW, a dedicated home charger can deliver considerably more power and make regular home charging much more practical.

A 7.4kW charger is commonly used with a single-phase domestic electricity supply in the UK and is well suited to overnight charging.

Benefits of a 7.4kW Charger

• Ideal for many UK homes

• Practical overnight charging

• Suitable for everyday driving

• Works well with smart charging features

• Does not normally require a three-phase supply

A 7.4kW charger is particularly practical for drivers who return home, plug in and leave the car charging for several hours.

How Fast Does a 7.4kW EV Charger Charge an Electric Car?

Charging time depends on your EV's battery size, how much energy needs to be replaced and the maximum AC charging speed supported by the vehicle.

As a simple example, a 60kWh battery could theoretically take around 8 hours to charge from empty to full using a 7.4kW charger.

In everyday driving, however, most people do not charge from 0% to 100% every night. You may only need to replace the energy used during the day's driving.

Approximate Charging Times

These are approximate figures based on battery capacity divided by charging power. Actual charging times can vary depending on the vehicle, battery condition, temperature, charging losses and the maximum charging rate supported by the car.

What About an 11kW EV Charger?

An 11kW EV charger sits between 7.4kW and 22kW.

It is commonly associated with a three-phase electrical supply and can offer faster AC charging than a 7.4kW charger when both the property and vehicle support it.

However, an 11kW charger is not automatically better than a 7.4kW charger.

Your EV must be able to accept 11kW AC charging, and your property must have a suitable electrical supply and installation.

This makes 11kW a useful option for some homes with three-phase electricity, particularly where the driver regularly needs to replenish a larger amount of energy in a shorter period.

For many typical UK homes with single-phase electricity, 7.4kW remains the more straightforward option.

What Is a 22kW EV Charger?

A 22kW EV charger can provide up to 22 kilowatts of AC charging power when the electrical installation and vehicle support that level.

Compared with 7.4kW and 11kW charging, 22kW can provide substantially more power.

However, 22kW charging is not available simply because you install a 22kW-rated charger.

You generally need:

• A suitable three-phase electricity supply

• A charger capable of 22kW

• An EV capable of accepting 22kW AC charging

• An electrical installation suitable for the proposed charging setup

Benefits of a 22kW Charger

• Much higher potential AC charging power

• Useful where rapid home top-ups are genuinely needed

• Can suit some commercial or fleet applications

• Useful for locations where vehicles are charged frequently throughout the day

For a typical homeowner who leaves their car parked overnight, however, 22kW may provide more capacity than they actually need.

7.4kW vs 11kW vs 22kW: What's the Difference?

The key point is simple:

The charger can only deliver as much power as the vehicle and electrical installation can actually use.

Does Your EV Support 22kW Charging?

This is one of the most important things to check before choosing a charger.

Your EV has an onboard charger that converts the AC electricity supplied by a home charger into the DC energy stored in the battery.

Different EVs have different onboard AC charging capabilities.

For example, some current Tesla models support up to 11kW on suitable three-phase AC charging, rather than 22kW.

So imagine you install a 22kW charger.

Your home can supply 22kW.

But your EV can only accept 11kW AC.

Your car will still charge at a maximum of 11kW.

The extra charger capacity does not increase the vehicle's onboard charging capability.

The same principle applies to 7.4kW charging. If your EV has a lower maximum AC charging rate, the car will limit the charging speed even if the charger is capable of more.

Before investing in a faster charger, always check your exact vehicle's maximum AC charging capability.

The Charger Is Only One Part of the System

It is useful to think of your charging speed as being limited by the lowest-capacity part of the setup:

Your home's electrical supply → your charger → your EV

For example:

22kW charger + 22kW-capable supply + 11kW EV = up to 11kW charging

Likewise:

7.4kW charger + suitable supply + 7.4kW-capable EV = up to 7.4kW charging

This is why buying the biggest charger available is not always the smartest choice.

What About Your Home's Electrical Supply?

The charger rating is only part of the equation.

Your home's electrical supply and installation must also be suitable for the charging power you want to use.

A typical 7.4kW charger is designed around a single-phase domestic supply.

Higher-power 11kW and 22kW AC charging are commonly associated with three-phase electricity.

That does not mean you should automatically upgrade your property to three-phase just to install a higher-powered charger.

Your installer should assess the existing electrical installation, available capacity and proposed charging setup before recommending the appropriate charger.

Is 7.4kW Fast Enough for Your EV?

For most UK drivers who charge at home overnight, yes.

If your car is parked at home for several hours, you have a long charging window available without needing the maximum possible AC charging rate.

The important question is not whether 22kW sounds faster.

It is whether you actually need more charging power than 7.4kW can provide.

A 7.4kW charger can be particularly suitable for:

• Daily commuters

• Families with an electric vehicle

• Plug-in hybrid owners

• Drivers who park at home overnight

• EV owners looking for convenient everyday home charging

For typical daily driving, a 7.4kW charger can replenish the energy used during the day in a relatively short part of the overnight charging window.

A higher-powered charger becomes more useful when you regularly need to replenish a large amount of energy in a shorter period, your vehicle supports the higher AC charging rate and your property can supply it.

So yes: for many UK home-charging situations, 7.4kW is fast enough.

Why 7.4kW Is Popular with UK EV Drivers

1. Faster Than a Standard Plug

Charging an EV using a regular three-pin plug can take significantly longer. A dedicated home charger provides considerably more power, making regular overnight charging much more practical.

2. Ideal for Overnight Charging

Most EV owners park their cars at home for several hours overnight.

A 7.4kW charger makes good use of that time by charging the vehicle while it is parked.

3. Suitable for Many Homes

A 7.4kW charger works with a typical single-phase domestic supply, although every installation should still be assessed to make sure the property and electrical installation are suitable.

4. Works Well with Smart Charging

Modern smart EV chargers can offer features such as app control, scheduled charging and energy management.

This allows drivers to choose when their vehicle charges and, where their electricity tariff allows it, potentially make use of cheaper off-peak periods.

When Should You Choose an 11kW Charger?

An 11kW charger can make sense when several things line up.

You have a suitable three-phase electricity supply.

Your EV supports 11kW AC charging.

And you have a genuine reason to want the additional charging speed.

For example, you may drive longer distances each day, return home with a low battery and need to replace a larger amount of energy before your next journey.

If your property already has three-phase electricity, 11kW can be a useful middle ground between 7.4kW and 22kW.

But there is little benefit in choosing 11kW when your EV or property cannot actually make use of it.

When Does a 22kW Charger Make Sense?

A 22kW charger makes the most sense when all three parts of the system support it:

Your property has suitable three-phase electricity.

Your charger can deliver 22kW.

Your EV can accept 22kW AC charging.

There should also be a genuine reason for needing the additional charging speed.

This could include situations where vehicles need to take on a large amount of energy quickly between journeys or where several vehicles are charged throughout the day.

For many typical homeowners who charge overnight, the additional capacity may simply go unused.

22kW vs 7.4kW: Which Is Actually Faster?

On paper, 22kW can deliver almost three times the power of 7.4kW.

But that does not mean every EV will charge nearly three times faster.

Imagine:

Your charger: 22kW
Your home's supply: suitable for 22kW
Your EV: maximum 11kW AC

Your vehicle still charges at up to 11kW.

This is why your vehicle specification matters just as much as the charger specification.

Approximate Charging Time: 7.4kW vs 22kW

Using simple battery-capacity calculations:

*These are idealised calculations assuming the vehicle can actually accept the full charger output. Real charging times can be longer, and many EVs cannot accept 22kW AC charging.

Home Charging vs Public Rapid Charging

Public rapid chargers can provide much higher charging speeds than a typical home charger.

But public rapid charging and home charging serve different purposes.

A home charger allows you to:

• Charge where you park

• Charge overnight

• Schedule charging around your electricity tariff

• Start each day with the vehicle ready for regular driving

Public rapid charging is more useful when you are travelling long distances or need to add a significant amount of charge quickly while away from home.

For many EV drivers, home charging handles the everyday routine while rapid charging is reserved for longer journeys.

What Should You Check Before Installing an EV Charger?

Before choosing between 7.4kW, 11kW and 22kW, consider four things.

Your Vehicle's Maximum AC Charging Speed

Check your exact EV model and specification.

Do not assume that because a charger can deliver 22kW, your car can accept 22kW.

Your Home's Electrical Supply

Your installer should assess your existing supply and electrical installation before deciding what charging power is appropriate.

How Long Your Car Is Usually Parked

If your car is parked at home overnight for several hours, you may have plenty of time to charge without needing maximum AC power.

How Much You Actually Drive

Think about your normal driving routine.

Someone who drives 20 miles a day and charges overnight has very different requirements from someone covering long distances every day.

7.4kW vs 11kW vs 22kW: Which Charger Should You Choose?

Choose a 7.4kW charger if you:

• Have a typical single-phase domestic supply

• Charge your EV overnight

• Want practical everyday home charging

• Do not regularly need very fast AC top-ups

• Want a straightforward home charging setup

Consider an 11kW charger if you:

• Have a suitable three-phase supply

• Have an EV that supports 11kW AC charging

• Regularly need faster charging than 7.4kW provides

• Have a genuine use case for the additional power

Consider a 22kW charger if you:

• Have suitable three-phase electricity

• Have an EV capable of 22kW AC charging

• Need substantially faster AC charging

• Regularly charge vehicles throughout the day

For most typical UK home charging, 7.4kW is the sensible starting point.

If your car and property can make use of 11kW or 22kW, the higher power can be worthwhile when your charging routine genuinely benefits from it.

Why Most UK Homeowners Choose a 7.4kW Charger

For many UK households, a 7.4kW EV charger offers a practical balance of charging speed, convenience and installation requirements.

It works with the common single-phase domestic setup and can make excellent use of the hours your vehicle is already sitting at home.

It also works well with smart charging, allowing drivers to schedule charging around their electricity tariff where supported.

The important thing is not to choose 7.4kW simply because it is common.

Choose it because it matches your car, your home and your routine.

Is 7.4kW the Best Home Charging Speed?

For many UK homeowners, 7.4kW is one of the best all-round home charging speeds.

It offers a substantial increase over a standard three-pin socket, is well suited to overnight charging and works with the typical single-phase electricity supply used by many UK homes.

For drivers whose cars are parked at home for several hours, it can provide practical daily charging without the additional requirements of a higher-powered three-phase setup.

However, 7.4kW is not automatically the best choice for every driver.

Your vehicle's maximum AC charging speed, your home's electrical supply, your driving habits and how quickly you need to recharge should all be considered.

A 22kW charger may make more sense where three-phase electricity is available, the vehicle supports 22kW AC charging and faster charging is genuinely needed.

For most typical UK households, however, 7.4kW provides a practical balance of speed and convenience.

Why Choose NextGen Charge?

At NextGen Charge, we provide smart 7.4kW EV chargers designed for everyday home and workplace charging.

The NextGen Pro currently offers:

• 7.4kW charging

• Smart technology and app control

• Weatherproof design

• Professional installation

• 7-year warranty

• 5m, 7.5m and 10m tethered cable options

Whether you are charging every night or simply want a dependable home charging setup, choosing the right charger starts with understanding what your vehicle and home can actually use.

Final Thoughts

Both 7.4kW and 22kW EV chargers have their advantages, while 11kW offers another option for homes and vehicles that support higher-power AC charging.

But the biggest number is not automatically the best choice.

A 7.4kW charger is a practical option for many typical UK homes and overnight charging routines.

An 11kW charger can make sense when a suitable three-phase supply and compatible EV make use of the additional power.

A 22kW charger can be worthwhile when the property, charger and vehicle can all support 22kW AC charging and faster charging is genuinely needed.

Ultimately, the right home charger depends on your EV, your electrical supply and how you use your car.

For many drivers, the smartest choice is not the charger with the biggest number.

It's the charger that fits your life.