Fuel prices, environmental awareness and independence from Russian oil are leading to a boom in electric cars.In order to avoid high charging costs, it is ideal to produce the electricity yourself – solar power is clean anyway.But how big does the solar system have to be to supply an electric car with electricity over the year?EFAHRER.com did the math.Parking spaces that are not in multi-storey car parks or underground garages are repeatedly criticized because of the high degree of surface sealing.But what if you use the area consumed to generate electricity via photovoltaics?Is the energy harvested there sufficient to charge an average e-car all year round?EFAHRER.com does the model calculation.The power consumption of a Tesla Model 3 is a generous estimate of just under 20 kilowatt hours per 100 kilometers - we use a value of 20 kWh in the following.The average annual mileage of a car in Germany is 14,000 km.Calculated with the consumption of the Stromer, this results in an annual consumption of 2,800 kWh.Depending on the manufacturer, you can expect different peak powers for current PV modules.In our model calculation, we assume a solar module with an area of ​​almost two square meters and a peak output of 400 watts.This is a standard market value, which is even slightly exceeded by the best modules.In Germany, an average of 1,000 full-load hours per year can be expected as long as the solar modules are not covered by buildings or trees and are optimally aligned.400 kWh of electricity can be generated over the entire year with 1,000 full-load hours and a peak of 400 watts.In order to generate enough electricity to supply an electric car like Tesla's Model 3 with a consumption of 2800 kWh, seven such solar modules are needed.With an area of ​​two square meters per module, the total area is 14 square meters.A normal parking lot with a length of just five meters and a width of 2.8 meters with an area of ​​14 square meters is already sufficient to set up a carport with elevated solar modules there - mathematically even more is possible with elevated modules, at an angle of 45 degrees for example 40 percent more.Statistically speaking, there are more than 1.7 parking spaces for every car in Germany – at home, at work, in multi-storey car parks, etc. If all of these areas were equipped with photovoltaics, then the electricity requirements of a fully electrified German car fleet could be covered without sealing additional areas will.And the best thing is: Electricity generated in this way costs between 9 and 15 cents per kWh (depending on the size of the overall installation) and is cheaper than any other clean car fuel.Of course, the generation of electricity by photovoltaics is subject to large fluctuations.However, up to a week of cloud cover is not a big problem, because the average electric car with a 40 to 50 kWh battery capacity can provide the electricity for an average week (approx. 270 kilometers).Longer phases without solar radiation must be buffered via the power grid.Current findings on the seasonality of renewables show that solar and wind power complement each other almost perfectly.It is only necessary to cover with alternative sources for extended dark doldrums without sun and wind.Do you know our newsletter?Twice a week we inform you about the latest car and two-wheeler tests, useful guides and purchase advice as well as the most important news about e-mobility and solar.Subscribe to the newsletter now!Discuss with other EFAHRER readers on Facebook or contact the editors directly on Twitter.You will also find new test videos on our (still relatively young) YouTube channel – it’s best to subscribe now.The Renault Zoe is one of the cheap used e-cars.EFAHRER.com reveals what to consider when buying the Renault...Electric cars are no longer useless as used cars.Due to the long delivery times, it is even worth it...Even on Google Maps you can see that the area at Weiherfeld near Ingolstadt is packed with cars.Yet...