Electric charging station for your home

With an e-charging station at your home, you can charge your electric car quickly and easily and save costs. Combined with a solar energy system, charging your car is also 100% emission-free.

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How long does it take to charge my electric car?

The charging time of electric cars primarily depends on four factors

  1. The number of kilometres driven per day*
  2. The charging capacity of the charging station
  3. The car’s charging technology
  4. The battery capacity

* The fewer the kilometres that have been driven, the less the battery needs to be charged.

Calculation formula for the charging time

Charging time = battery capacity in kWh / charging capacity (kW)

 

The charging time of your electric car is significantly reduced with the installation of a wall charging station. The wall charging station, which is also referred to as a wall box, allows for very high charging capacities, as it was especially designed for the charging of electric cars.

In particular, alongside the charging capacity, it is the battery capacity that is decisive in determining the charging time. The smaller the battery, the shorter the charging time for a complete charging process. However, the range of the electric car is also shorter.

Charging time: charging station vs household socket

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Charging station

Charging capacity: 3.6 to 22 kW / Charging time: 2 to 6 hours

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Household socket

Charging capacity: up to 3.7 kW / Charging time: 8 to 48 hours

 

 

 

Which charging infrastructure do you need for your electric car?

The choice of infrastructure depends on the required socket type. Depending on the vehicle manufacturer, different socket systems are used.

With a view to energy efficiency and future further developments, a “smart” charging station is recommended. In addition to the linking of photovoltaic systems (solar energy system), this also allows controlled charging as well as billing with other people who use the charging station.

 

Installation and costs of the home charging station

The installation of the charging station is the responsibility of the building owner. Due to the complex safety situation for the installation, this should be performed by experts.

The installation costs vary according to the length of the cable connection.

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Interested in a charging station?

Installing a charging station at home

Charge your electric vehicle conveniently at home using a wall box charging station. A wall box for the home has an average charging capacity of 11 kW or 22 kW. The formula is relatively simple: with a charging capacity of 22 kW, the charging time is reduced by half on average. This means that full charging is achieved after around two hours at an average 22 kW charging station. A charging station with 11 kW charging capacity is completely sufficient for everyday use.

While electric vehicles and plug-in hybrids in Switzerland can also be charged using a normal household socket (Type T13), these are not designed for continuous use with such high power loads. Electric vehicles can also be charged using a CEE industrial socket (a high-voltage outlet), but a wall box must be connected between the vehicle and the socket. This will ensure that the electricity supply between the power grid and the battery is secure, and any overloading of the power grid or the battery is prevented.

Two connections can be provided at a single charging station if required, enabling two cars to be charged simultaneously. The wall box is usually located on a wall, and the vehicle’s charging connection can simply be connected to the charging station using a charging cable. The most common connector type is the standard European Type 2 connector. Before installing a wall box, you will need to contact the grid operator to find out whether approval needs to be obtained for the device. In most cases, this is a mere formality.

Generally, every type of building is suitable for the installation of an electric charging station, but before installing a charging station in your garage, the electrician will have to check the existing power grid in the house to determine whether it meets the demands of an electric vehicle charging station. If this is the case, you can arrange for the electrician to conveniently install the wall box in your garage or carport. Tenants or apartment owners within a larger building can also have an electric vehicle charging station installed at their parking space or in their underground car park. In an ideal scenario, the building owner will handle the installation and benefit from generous grant funding from the canton.

 

Electric vehicle charging stations for private use are equipped with various features. The wall box should have a Type B residual current device (RCD) which automatically switches off the power as soon as it identifies residual current in order to prevent electrical accidents. An optional electricity meter will indicate how much electricity has been used by the electric vehicle while charging. The load management integrated in the charging station prevents the overloading of the power grid.

When purchasing an electric vehicle such as a VW ID.3Audi e-tronSEAT Mii or ŠKODA ENYAQ iV, it is worthwhile including your own charging station directly in the investment. Purchases of private charging stations are also promoted by the federal government and the cantons through grant funding and tax savings.
Calculate charging station

Also, home owners can use their own electric «filling stations» with power from the solar panels on their roof. Surplus electricity is not fed into the grid at unattractive conditions, but can be used for charging the battery of your own electric vehicle, helping you to cut energy costs while also benefiting the environment.

Do you have a solar energy system? 

If so, the use of a home charging station is even more worthwhile. The charging of your electric car using your own electricity from the solar energy system (photovoltaics) makes sense from both an environmental and economic perspective. For the efficient use of your solar energy system, it is recommended to purchase a charging station with a clever control system.

Benefits of a charging station with photovoltaics
  • The energy consumption is increased, which has a positive impact on the profitability of your solar energy system.
  • You can charge your electric car more cheaply.
  • You are more independent of the price of electricity.
  • You can charge your electric car 100% emission-free.