Wallbox 11 kW vs. 22 kW – Which One Should You Choose for Your Electric Car?

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Buying a wallbox is one of the first decisions new electric vehicle owners need to make. A common question is whether it's better to choose an 11 kW wallbox or invest in a 22 kW wallbox.

The answer is not always straightforward. In most cases, a more powerful wallbox does not mean faster charging. The charging speed primarily depends on your vehicle's on-board charger (OBC) rather than the charging station itself.

In this guide, you'll learn:

• the differences between 11 kW and 22 kW wallboxes,
• which electric vehicles can actually use 22 kW AC charging,
• when upgrading to a 22 kW wallbox makes sense,
• and how to choose the best solution for both today and the future.

Key Takeaways

• Most modern electric vehicles support up to 11 kW AC charging.
• A 22 kW wallbox will not charge an EV faster if the vehicle has an 11 kW on-board charger.
• A 22 kW wallbox typically requires a 3-phase 32 A electrical supply.
• Dynamic load balancing helps prevent overloading your home's electrical system.
• A 22 kW wallbox can be a smart long-term investment if you plan to upgrade your EV in the future.

How AC Charging Works

A home wallbox supplies your electric vehicle with alternating current (AC).

Inside the vehicle, the on-board charger (OBC) converts AC electricity into direct current (DC), which is used to charge the battery.

This means that the maximum charging speed is determined by the vehicle's on-board charger, not by the wallbox alone.

For example:

• A vehicle with an 11 kW OBC will charge at a maximum of 11 kW.
• Even if it's connected to a 22 kW wallbox, charging will still be limited to 11 kW.

This is why installing a more powerful wallbox does not automatically reduce charging time.

11 kW vs. 22 kW Wallbox – What's the Difference?

Which Electric Cars Benefit from an 11 kW Wallbox?

Today, most electric vehicles are equipped with an 11 kW AC on-board charger.

Examples include:

• Tesla Model 3
• Tesla Model Y
• Škoda Enyaq
• Volkswagen ID.3
• Volkswagen ID.4
• Volkswagen ID.5
• Hyundai Ioniq 5
• Hyundai Ioniq 6
• Kia EV6
• Renault Megane E-Tech
• Volvo EX30
• Audi Q4 e-tron

Some vehicles support even lower AC charging power, for example:

• Peugeot e-208 – 7.4 kW
• Peugeot e-2008 – 7.4 kW
• Opel Corsa Electric – 7.4 kW (depending on version)

For these vehicles, an 11 kW wallbox is more than sufficient.

Which Electric Cars Support 22 kW AC Charging?

Support for 22 kW AC charging is still relatively uncommon and is generally available only in specific models or optional configurations.

Examples include:

• Renault Zoe
• Selected versions of the Mercedes-Benz EQA
• Selected versions of the Mercedes-Benz EQB
• Certain BMW models equipped with an optional 22 kW AC charger

Always check the technical specifications of your specific vehicle before purchasing a wallbox, as charging capabilities can vary between model years and trim levels.

How Long Does Charging Take?

For a battery with a usable capacity of approximately 77 kWh, charging times are roughly:

*Only if the vehicle supports 22 kW AC charging.

Actual charging times depend on battery temperature, charging curve, battery condition, and environmental factors.

Should You Buy a 22 kW Wallbox?

It depends on your current and future needs.

Choose an 11 kW Wallbox if:

• Your EV supports a maximum of 11 kW AC charging.
• You don't plan to replace your vehicle anytime soon.
• Your home has a standard 3-phase 16 A electrical supply.
• You want lower installation costs.

Consider a 22 kW Wallbox if:

• You expect to upgrade to a newer EV in the coming years.
• You're building a new home and want to future-proof your charging infrastructure.
• Your electrical installation supports 3-phase 32 A.
• You value long-term flexibility.

A wallbox often remains in service much longer than the vehicle itself, making future compatibility an important consideration.

Do I Need a 32 A Electrical Connection?

This is one of the most frequently asked questions.

Typically:

• An 11 kW wallbox requires a 3 × 16 A circuit breaker.
• A 22 kW wallbox requires a 3 × 32 A circuit breaker.

However, a 22 kW wallbox does not constantly draw its maximum power.

Modern charging stations can automatically adjust charging power based on your home's current electricity consumption.

Why Dynamic Load Balancing Matters

Many premium wallboxes include Dynamic Load Balancing, a feature that continuously monitors household electricity usage.

If appliances such as:

• an oven,
• an induction cooktop,
• a heat pump,
• or an air conditioning system

are running simultaneously, the wallbox automatically reduces charging power to prevent overloading the electrical installation.

Once household consumption decreases, charging power is increased again.

Benefits include:

• improved electrical safety,
• reduced risk of tripped circuit breakers,
• optimal use of available power,
• fully automatic charging management.

This feature is particularly valuable in residential homes.

Why Consider the V2C Trydan?

The V2C Trydan is an example of a modern smart wallbox offering advanced charging features, including:

• Dynamic Load Balancing,
• photovoltaic (solar) integration,
• smart charging schedules,
• mobile app control,
• integrated 6 mA DC leakage protection (which, in many installations, eliminates the need for an external Type B RCD, subject to local regulations and installation design),
• scalability for future charging needs.

These features make it a practical choice for homeowners looking for a long-term charging solution.

Common Mistakes When Choosing a Wallbox

Avoid these common misconceptions:

❌ Assuming that a 22 kW wallbox will always charge twice as fast.

❌ Ignoring the charging capabilities of your vehicle's on-board charger.

❌ Forgetting to verify your home's electrical capacity.

❌ Choosing the cheapest wallbox without considering smart features.

❌ Not planning for future vehicle upgrades.

Frequently Asked Questions

Will a 22 kW wallbox charge my 11 kW EV faster?

No. The vehicle will only draw the maximum power supported by its on-board charger.

Is a 22 kW wallbox a good long-term investment?

Yes. If you plan to replace your EV within the next few years, installing a 22 kW wallbox now can help avoid another hardware upgrade later.

Can every home support a 22 kW wallbox?

Not always. It depends on the available electrical supply and your home's installation. A qualified electrician should verify compatibility before installation.

Is an 11 kW wallbox enough for everyday charging?

Yes. For most EV owners, an 11 kW wallbox provides more than enough charging power to fully recharge the vehicle overnight.

Conclusion

For most electric vehicle owners, an 11 kW wallbox is the most practical and cost-effective choice because it matches the charging capabilities of the majority of modern EVs.

However, if you're planning to upgrade your vehicle, installing a new electrical system, or simply want to prepare your home for future electric cars, a 22 kW wallbox can be a worthwhile long-term investment.

The best choice depends not only on your current vehicle but also on your home's electrical infrastructure and your future mobility plans.

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