Is a 22kW EV Charger Worth It? The Complete UK Guide for Home EV Charging

How Does a 22kW EV Charger Work?

A 22kW EV charger delivers AC electricity from your home’s mains supply, where it’s converted into DC (direct current) by your car’s onboard charger before being stored in the battery.

The higher the charger’s power output, the faster energy can potentially be transferred to the vehicle.

*Actual charging speeds vary depending on the vehicle and charging conditions.

Why Three-Phase Power Matters

One of the biggest differences between a standard home charger and a 22kW home charger UK installation is the type of electricity supply required.

Most UK homes use a single-phase electricity supply, which is perfect for a 7kW or 11kW EV charger.

On the other hand, a 22kW EV charger requires a three-phase electricity supply. That’s much more common in commercial buildings and larger homes because it provides significantly more available power.

Without a three-phase supply, a 22kW charger cannot operate at its full charging speed.

This is why checking your property’s electrical setup is the first step before considering a 22kW home charger. Even if the charger is capable of delivering 22kW, your home must be able to support it.

The biggest advantage of a 22kW EV charger is the added speed.

Compared to a standard 7kW EV charger, a 22kW home charger can significantly reduce charging times for compatible vehicles. Which is useful if you cover high daily mileage, have more than one EV to keep charged, or need to recharge quickly between long journeys.

However, it’s important to remember that these speeds represent the charger’s maximum output. The actual charging rate will always be limited by your vehicle’s onboard charger and battery management system.

22kW vs 7kW Charging Times

To see the difference, let’s look at how long it would take to charge a battery from 10% to 80%.

These figures are estimates and vary depending on your vehicle, battery condition, the temperature, and charging conditions, but they give you an idea of the difference in speed a 22kW EV charger can provide.

How Much Range Can a 22kW Charger Add Per Hour?

We also like to compare charging speeds by looking at how much driving range can be added each hour. Under ideal conditions:

• A 7kW charger typically adds around 25–30 miles of range per hour
• An 11kW charger typically adds around 35–45 miles of range per hour
• A 22kW EV charger can add up to 80–90 miles of range per hour

So a compatible vehicle could potentially gain enough charge for an average week’s commuting in just a couple of hours.

Caution: Real-World Charging Speeds Are Often Lower

While manufacturers quote “maximum charging speeds”, we don’t live under laboratory conditions, so the real-world figures are usually quite different.

There are plenty of factors that affect charging times, including:

• The vehicle’s maximum AC charging rate
• Battery temperature
• Battery state of charge
• Weather conditions
• Power management settings within the vehicle

As the battery approaches full capacity, charging speeds also tend to slow down to protect battery health. Which is why many charging time estimates focus on charging from 10% to 80%, rather than 0% to 100%.

For this reason, installing a 22kW home car charger doesn’t automatically mean you’ll achieve 22kW charging speeds every time you plug in. The charger may be capable of delivering that power, but your vehicle and charging conditions ultimately determine how much of it can be used.

Your Vehicle Controls the Charging Speed

When charging at home, it’s your vehicle’s onboard charger that determines how much AC power can be converted and stored in the battery.

Think of it like filling a bottle with water. You can use a larger hose, but if the bottle’s opening remains the same size, it can only fill so quickly.

The same principle applies to EV charging.

Even if you install a 22kW home car charger, your vehicle will only draw the amount of power its onboard charging system is designed to accept.

Why Many EVs Never Reach 22kW Charging Speeds

While 22kW charging sounds impressive, relatively few vehicles on UK roads can take full advantage of it.

Many popular electric vehicles are limited to 7kW AC or 11kW AC charging by design.

This means a vehicle with an 11kW onboard charger will still only charge at 11kW, even when connected to a 22kW EV charger.

Should You Buy a 22kW EV Charger for Future-Proofing?

Some EV homeowners choose a 22kW home car charger UK installation as a way of future-proofing their property. This can make sense for you if:

• You already have a three-phase electricity supply
• You’re planning to upgrade your EV in the near future
• Multiple vehicles will be using the charger
• You expect future EVs you buy to support higher AC charging rates

However, if your current vehicle is limited to 7kW or 11kW charging and your home requires a costly three-phase upgrade, the benefits probably won’t outweigh the expense.

How to Check if You Have a Three-Phase Electricity Supply

If you’re unsure what type of electrical supply your property has, here are the signs you already have a three-phase supply:

• Your property is a farm or rural business
• You live in a large (4+ bed) detached home
• Your property has commercial workshops or outbuildings
• Your home was built with high electrical demand in mind
• Your electricity meter has three service fuses rather than one

If you’re totally unsure, we’re here to help. We specialise in professional home EV charger installations, and can help you choose the best EV charger for your property.

What If Your Home Only Has Single-Phase Power?

If your property has a standard single-phase connection, a 22kW EV charger won’t be able to operate at its full charging speed.

You can choose to upgrade your supply to three-phase power, but it involves work carried out by your local Distribution Network Operator (DNO), who manages the electricity infrastructure in your area.

The process is lengthy and includes:

1. Assessing the existing supply
2. Determining whether local infrastructure can support an upgrade
3. Installing new cabling and equipment where required
4. Upgrading the property’s incoming electrical connection

Depending on your property and location, this can be a significant undertaking with a costly bill.

How Much Does a Three-Phase Upgrade Cost?

The cost of upgrading to a three-phase supply varies considerably. But the main factors that can influence the price are:

• Your location
• Distance from the existing network
• Groundworks requirements
• Existing electrical infrastructure
• Capacity available on the local grid

Costs can run into several thousand pounds before the home EV charger installation is even considered, which is why it’s important to have real benefits in mind before committing to a 22kW home car charger.

Is a 22kW Home Car Charger Common in the UK?

While interest in faster home charging continues to grow, 7kW chargers remain the most common option for UK homeowners. That’s because they:

• Work with standard single-phase supplies
• Meet the charging needs of most drivers
• Have lower installation costs
• Are compatible with virtually all electric vehicles

A 22kW EV charger is generally best suited to properties that already have three-phase power available, rather than homes that would require a significant electrical upgrade to support one.

Before making a decision, it’s worth speaking to our experienced EV charging specialists who can assess your property, explain your options, and help determine whether a 22kW charger is genuinely the most practical solution for your needs.

By this point, you’ve probably realised that a 22kW EV charger isn’t the best choice for most EV owners.

However, there are situations where a 22kW home car charger can offer genuine advantages over a standard 7kW charger.

Here are the scenarios where investing in a 22kW home charger UK installation is most likely to make sense.

You Already Have a Three-Phase Electricity Supply

This is the biggest factor. If your property already has three-phase power, most of the barriers associated with installing a 22kW EV charger disappear. You won’t need to budget for a costly supply upgrade, and you’ll already have the infrastructure required to support faster charging.

Your Vehicle Supports 22kW AC Charging

A 22kW EV charger only delivers its full value when paired with a vehicle capable of accepting 22kW AC charging.

If your EV supports these charging speeds, the difference can be significant.

For example, a vehicle that takes six to eight hours to recharge on a 7kW charger could potentially be ready in a fraction of the time when connected to a compatible 22kW charging setup.

For drivers who rely heavily on their vehicle throughout the day, that flexibility is extremely valuable.

You Drive High Annual Mileage

Not every EV owner plugs in overnight and forgets about charging until morning.

Some drivers cover hundreds of miles each week and need their vehicle available throughout the day.

A 22kW home car charger may be worth considering if you:

• Travel extensively for work
• Operate a taxi or private hire vehicle
• Work as a mobile engineer or contractor
• Frequently go on long-distance journeys

In these situations, being able to recover a substantial amount of range in just a few hours can make day-to-day charging far more convenient and take some of the stress out of relying on an EV day to day.

You Have More Than One Electric Vehicle

As households increasingly move towards electric vehicles, charging demand at home is growing.

If your family has two or more EVs, faster charging helps stop the fights over charging time, particularly if both vehicles are used regularly.

Combined with smart charging features and load balancing, a 22kW EV charger can help larger households manage multiple vehicles more efficiently.

You’re Looking to Future-Proof Your Property

Battery capacities continue to increase, and charging technology is constantly evolving.

While a standard 7kW charger remains the right choice for many homeowners today, some property owners prefer to install infrastructure that can support future vehicle upgrades.

A 22kW home charger may be worth considering if:

• You expect to own multiple EVs in the future
• You regularly replace vehicles
• You want to maximise your property’s EV charging capabilities for resale purposes

Future-proofing shouldn’t be the only reason to choose a charger, but when the necessary electrical infrastructure is already in place, it can be a sensible long-term investment.

The Bottom Line

A 22kW EV charger is most likely to be worth the investment when three key factors align:

• Your property has a three-phase electricity supply
• Your vehicle supports 22kW AC charging
• You have a genuine need for faster charging

If that sounds like your situation, a 22kW home car charger can provide significantly faster charging times and greater flexibility. If not, a standard 7kW charger will deliver everything you need at a much lower cost.

For most UK homeowners, a standard 7kW charger delivers all the charging speed they need without the additional complexity and expense.

Here are some situations where a 22kW home charger won’t provide enough benefit to justify the investment.

Your Home Has a Standard Single-Phase Electricity Supply

Most UK homes are connected to a single-phase electricity supply, which is ideal for a 7kW charger but cannot support a 22kW EV charger at full power.

If upgrading to three-phase electricity would require significant work and expense, it’s worth asking whether you’ll actually see enough benefit to justify the cost.

For many drivers, the answer is no.

You Mainly Charge Overnight

One of the most overlooked questions when choosing an EV charger is, how quickly do you actually need your car to charge?

If you usually arrive home in the evening and leave the next morning, a standard 7kW charger is more than capable of keeping your battery topped up.

For example, a vehicle driven 30–50 miles per day can usually recover that energy in just a few hours on a 7kW charger. Even larger battery packs can often be fully recharged overnight.

In these circumstances, paying for a faster charger probably won’t deliver any noticeable improvement to your daily routine.

Your EV Is Limited to 7kW or 11kW Charging

This is one of the biggest reasons homeowners decide against a 22kW home car charger UK installation.

Many popular electric vehicles are unable to accept 22kW AC charging speeds. Instead, they’re limited to 7kW or 11kW through their onboard charging systems.

If your vehicle can only charge at 11kW, a 22kW charger won’t make it charge any faster.

You’ll still have access to a high-quality charging solution, but much of the charger’s available power will remain unused.

You Rarely Run Your Battery Low

Many EV owners develop a simple charging routine:

• Plug in when they get home
• Charge overnight on a cheaper tariff
• Start each day with plenty of range

If this already works well for your lifestyle, moving to a 22kW EV charger will give you very little practical benefit.

The reality is that most drivers don’t need to recharge an entire battery in a few hours. They simply need enough charge for tomorrow’s journey.

The Bottom Line

A 22kW EV charger is overkill for most UK households. If your home requires a costly electrical upgrade, your vehicle doesn’t support 22kW charging, and you already charge comfortably overnight, a standard 7kW charger will provide the same real-world convenience at a much lower cost.

That’s why it’s important to consider how you actually use your EV rather than focusing solely on charging speed. In many cases, the most expensive charger isn’t automatically the best charger.

If you’re deciding between a standard 7kW charger and a 22kW EV charger, the best choice comes down to your property’s electrical supply, your vehicle’s charging capability, and how quickly you need to recharge.

While a 22kW home charger offers significantly faster charging speeds on paper, that doesn’t automatically make it the right solution for every driver. For most UK households, a 7kW charger provides the ideal balance of affordability, convenience, and performance.

7kW vs 22kW EV Charger Comparison

Choose a 7kW EV Charger If…

• You have a standard UK home with a single-phase supply
• You charge your vehicle overnight
• Your daily mileage is relatively predictable
• Your EV is limited to 7kW or 11kW AC charging
• You want the most cost-effective charging solution

For the vast majority of UK EV owners, a quality 7kW charger provides more than enough charging speed for everyday use.

Choose a 22kW EV Charger If…

• Your property already has a three-phase electricity supply
• Your vehicle supports 22kW AC charging
• You regularly need rapid home charging
• You operate multiple EVs from the same property
• You’re looking to maximise future charging flexibility

When these factors align, a 22kW EV charger can dramatically reduce charging times and provide a level of convenience that a standard charger can’t match.

If you’re unsure which option is right for you, ask yourself three questions:

1. Does my property have a three-phase electricity supply?
2. Can my EV accept 22kW AC charging?
3. Do I genuinely need faster charging than a 7kW charger can provide?

If the answer to all three is yes, a 22kW home charger UK installation could be a worthwhile investment. If not, a 7kW charger will provide the best value and performance for your needs.

At Pro EV, we help homeowners and businesses choose the right charging solution for their needs, whether that’s a standard home charger or a high-performance 22kW EV charger installation. Our team can assess your property, explain your options, and recommend the most cost-effective solution for your vehicle and lifestyle. Get in touch for a free consultation today.