7.4 kW or 11 kW Charging Station: Which Power to Choose in Luxembourg?

Understanding Charging Station Power

When installing an electric vehicle (EV) charging station in Luxembourg, the question of power quickly arises. The two most common options are the 7.4 kW station and the 11 kW station. Power determines charging speed: the higher it is, the faster the battery fills. But this power must be compatible with your home electrical installation.

The 7.4 kW station operates on single-phase, which corresponds to most Luxembourg households. It delivers about 32 amps. The 11 kW station requires a three-phase connection, often absent in older homes. To install it, you may need to have your meter modified by the grid operator (CREOS), which incurs additional costs.

To help you decide, we have compared these two powers from all angles: cost, charging time, financial aid, and technical feasibility.

Charging Time: What's the Real Difference?

Charging time depends on your vehicle's battery capacity and the station's power. Let's take a typical example: an EV with a 50 kWh battery (average range of 350 km).

• 7.4 kW station: To charge from 0 to 100%, it takes about 6 hours 45 minutes. This suits a typical overnight charge.
• 11 kW station: The same vehicle charges in about 4 hours 30 minutes, saving over 2 hours.

This gain is valuable if you charge during the day or need to leave quickly. However, for most drivers, charging happens at night, and a duration of 6 to 8 hours is perfectly acceptable.

If you drive more than 100 km per day, an 11 kW station can be more convenient, as it allows you to recover range faster between trips.

Electrical Installation: Single-Phase or Three-Phase?

In Luxembourg, the majority of individual houses are connected in single-phase (230 V). A 7.4 kW station is perfectly suited to this type of connection. In contrast, an 11 kW station requires three-phase (400 V). If your meter is not three-phase, you will need to request a modification from your grid operator, which can take several weeks and cost between €500 and €1,500.

It is therefore essential to check the power of your connection before buying a station. Your electrician can perform this check during a preliminary visit. In some cases, switching to three-phase is impossible or very costly, making the 11 kW station unsuitable.

Another point to consider is the subscribed power of your electricity contract. An 11 kW station may lead to an increase in subscribed power, which will raise your subscription bill. Think about comparing long-term costs.

Purchase and Installation Costs

The price of a charging station varies by power, brand, and features (connectivity, load management, etc.). On average, in Luxembourg:

• 7.4 kW station: between €500 and €800 for hardware, excluding installation.
• 11 kW station: between €700 and €1,200 for hardware.

Installation by a qualified electrician typically costs between €300 and €800, depending on complexity (creating a dedicated line, updating the electrical panel, etc.). If you opt for an 11 kW station and need to switch to three-phase, add €500 to €1,500 for additional work.

It is important to note that installation must be done by a certified professional to qualify for financial aid and meet safety standards.

Financial Aid and Subsidies in Luxembourg

Since January 2026, the Klimabonus Wunnen program has replaced PRIME House. It is managed by Klima-Agence and offers subsidies for energy renovation, including the installation of EV charging stations. Conditions are available on guichet.public.lu.

For a smart charging station (with remote load management), you can receive a grant of up to €600. This aid is subject to conditions: the station must be installed by a certified professional, and the electric vehicle must be registered in Luxembourg.

Other aids exist for related equipment: if you install photovoltaic panels, the grant can reach €10,000 (about €8,300 for 10 kWp, with a maximum of 15 kWp). A home battery is also subsidized up to €2,250. These aids are cumulative, which can significantly reduce the overall cost of your installation.

Don't forget that VAT on renovation work in a dwelling older than 2 years is 3% (super-reduced rate), which represents a significant saving.

Which Power to Choose Based on Your Profile?

To help you decide, here are typical scenarios:

• Profile 1: Standard user (less than 50 km per day): a 7.4 kW station is more than sufficient. Overnight charging covers your daily needs.
• Profile 2: High-mileage driver (over 100 km per day): an 11 kW station can be interesting to reduce charging times, especially if you charge during the day.
• Profile 3: Household with two EVs: an 11 kW station allows faster charging of both vehicles, but you could also install two 7.4 kW stations.
• Profile 4: Photovoltaic installation: if you produce your own electricity, an 11 kW station may be more suitable to maximize your solar production during sunny hours.

In all cases, it is recommended to call a qualified electrician for a personalized study of your installation. They can check your meter's power, your electrical panel's capacity, and advise on the most suitable station for your needs.

Standards and Safety to Respect

Installing a charging station must comply with current standards, including NF C 15-100 (adapted for Luxembourg). The station must be installed on a dedicated circuit with a type A or B residual current device, and protection against overcurrents.

It is also important to choose a certified station (CE, NF) and to entrust installation to a qualified professional. A non-compliant installation can lead to electrical risks and disqualify you from financial aid.

Remember to declare the installation to your home insurer, as a charging station is considered a fixed installation.

Conclusion: An Informed Choice

In summary, the 7.4 kW station is the simplest and most economical choice for most Luxembourg households. It is compatible with single-phase, sufficient for overnight charging, and less expensive to buy and install.

The 11 kW station is justified if you have a need for fast charging (high-mileage drivers, professional fleets) or if you already have a three-phase connection. In that case, it can be a worthwhile investment, especially with Klimabonus aid.

Before deciding, assess your electrical installation and driving habits. Don't hesitate to get multiple quotes from certified electricians to compare offers.

For further reading, check our other articles on charging stations and renovation aid in Luxembourg.