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Charging at home: how expensive is an electric vehicle charging station?

The charging infrastructure for electric vehicles in public spaces is being expanded continuously, but the most convenient thing is to have your own charging point at home – such as one supplied by AMAG. In this article, we’ll answer key questions about wall boxes.

 

What are the benefits of a wall box?

wall box is a very safe and convenient solution that allows you to charge the car outside your own home or in a parking garage. The charging process can be conveniently completed overnight – and at maximum speed. Purchasing a private charging station is also promoted by the federal government and cantons. Using a charging station that draws its “fuel” from electricity you generate yourself via your own solar PV system is particularly kind on the environment and your wallet. 

How does a wall box work and where can I install one?

In principle, any building is suitable for use with an electric charging station. As the name suggests, a wall box is fitted to the wall. When it comes to charging, the electric vehicle’s charging socket is connected to the wall box via cable. Charging is a two-step process: first, the vehicle draws a constant high power. Once a certain charge level has been reached, the battery voltage then reaches its maximum value. At this point, the power is continuously reduced for the rest of the charging process until no more current flows at all. The battery is then fully charged and the charging process complete. 

How long does it take to charge the vehicle at home?

Charging electric vehicles depends on various factors, such as the kilometres driven per day, the battery capacity, the vehicle’s charging technology and, of course, the charging station’s power. The charging time is calculated using a simple formula: Charging time = Battery capacity in kWh / Charging power (kW). Home charging stations either have 11 kW or 22 kW. Using an average 22 kW charging station, it takes around two hours to complete a full charge. 

Why can’t I simply plug my electric vehicle into a standard household socket?

While this is theoretically possible, household sockets aren't designed for permanent charging at such high loads. Firstly, charging would take well over a day and there's also the risk of malfunctions and overheating.

How safe is a wall box? 

Extremely safe. Wall boxes have a type B residual current device (RCD) that detects fault currents and automatically switches off the power to prevent electrical accidents. What’s more, an energy or electricity meter can be installed that displays the amount of electricity consumed and prevents the electricity grid from being overloaded.

 

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What kind of charging station do I need?

The choice of infrastructure depends on the type of connector required. In general, when it comes to energy efficiency and future development, a “smart” charging station is recommended. As well as it being possible to connect it to a solar PV system, you can also control the charging, thereby opting for the most favourable tariff at the time.

How much does a wall box cost? 

Installation costs vary depending on the cable connection lengths. AMAG can use various parameters to determine exactly what you need here. It's also possible to obtain a charging station, including installation, at a fixed price. All in all, this costs around 3400 Swiss francs. A charging station excluding installation costs around 1600 Swiss francs. When purchasing a VW ID.3Audi e-tron or ŠKODA ENYAQ iV, it's definitely worthwhile including your own charging station as part of your investment. 

Can I install a wall box in the garage of a rented flat? 

In principle, tenants also have the option of having an electric vehicle charging station installed at their parking space or in an underground car park, but they have to get permission from their landlord first. In addition, they have to submit a technical dossier with detailed information on installation, capacity and connections with existing infrastructure, proving that electricity consumption will be billed individually. AMAG’s sales advisers would be happy to help you with this.

Can I install a wall box myself?

No. Due to the complex safety requirements, a wall box must be installed by a specialist. The electrician must first check the existing power supply in the house to ensure that it's sufficient for the requirements of an electric vehicle charging station. If this is ensured, the wall box can then be installed.

 

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Interested in a charging station for your home?