Solar charging stations for sun-powered electric vehicles!
People who charge their electric car at home with their own electricity at a solar charging station are not only eco-conscious, but also economical. In fact, the battery of your electric vehicle is an efficient way to increase the electricity storage capacity of your house. Surplus electricity is stored in the battery of the electric vehicle, meaning it does not have to be fed into the grid at an unfavourable electricity price. The excess power produced is only fed into the grid when the battery is fully charged.
By charging an electric car, you are making your solar panel system more profitable while also using solar power to your advantage.
Benefits of a solar power home charging station
- You increase your self-consumption
- You charge your electric vehicle more economically
- You will be less affected by electricity price increases
- 100 % zero-emission charging for your electric car
Increase your self-consumption using your electric car
On average, an electric car doubles the average electricity consumption of a household. This has a positive effect on self-consumption and the profitability of your solar system. In addition, your own solar power is up to about CHF 0.12 cheaper per kilowatt hour in Switzerland than electricity from the grid, so an electric car powered by solar electricity has less of an impact on your electricity costs.
How long does it take to charge my electric car?
The charging time of your electric car essentially depends on four factors:
- Kilometres travelled per day
- Charging power of the charging station
- Charging technology of the car
- Battery capacity
The charging speed depends on the number of kilometres driven per day. The fewer kilometres travelled with the electric vehicle, the less the battery needs to be recharged.
Installing a wall charging station at home can significantly reduce the time it takes to charge your electric car. A wall charging station or Wallbox is specially designed for charging electric cars and enables very high charging capacities.
As an alternative to home charging stations, you can opt for fast-charging stations where electric cars can be charged with a range of up to five kilometres per minute. Because of the infrastructure and costs involved, fast-charging stations are particularly suitable for companies with a large fleet of electric vehicles.
Battery capacity affects charging speed. The smaller the battery, the shorter the charging time until it is fully charged. However, this also means that the shorter the charging time, the shorter the range of the electric car.
Calculation formula for loading time:
Charging time = battery capacity in kWh / charging power (kW)
Charging time: charging station vs. household socket
|Infrastructure||Charging power||Charging time|
|Household socket||up to 3.7 kW||8 to 14 hours|
|Charging station/Wallbox||3.6 to 22 kW||2 to 6 hours|
Example calculation – Nissan Leaf 2:
The Nissan Leaf 2 needs to be plugged into a 2.3 kW socket for 16 hours to be fully charged.
The Nissan Leaf 2 can be fully charged in just under two hours using a 22-kW charging station. At a charging station, your electric car is fully recharged about 14 hours faster.
Example calculation: Charging time of Nissan Leaf 2 = 40 kWh / 22 kW = 1.81 h
Example calculation – Tesla Model S:
The Tesla Model S needs to be plugged into a standard 2.3 kW household socket for 40 hours to be fully charged.
The Tesla Model S can be fully charged in just under four hours with a 22-kW charging station. The Tesla Model S is therefore charged 10 times faster using a charging station than with a household socket.
Example calculation: Charging time of Tesla Model S = 85 kWh / 22 kW = 3.86 h
What charging infrastructure do i need?
In terms of energy efficiency and future development, a “smart” charging station is an absolute must. In addition to the connection to your solar panel system, a smart charging station also enables controlled charging and electricity billing with other people who use your charging station.
With the smart control system, the solar power is optimally used for your electric car. At the same time, it prevents the electricity from being fed into the grid at too cheap a price.
However, the choice of charging station depends on which type of plug is required. In Switzerland, different car manufacturers use different plug types. Plug type 1 is mainly used for Asian electric models and plug type 2 is used for European models.
Installation and costs of a home charging station
In Switzerland, the building owner is responsible for the installation of a charging station or Wallbox. However, the safety requirements for installing a home charging station are too complex for non-professionals to carry out the installation themselves. Our experts take care of every step of the installation of the home charging station, so that you can charge your electric car quickly and safely with solar energy.
The cost of a home charging station, including installation, starts at around CHF 2,500. The cost varies depending on the length of the connection cable.