Photovoltaics is the direct conversion of sun rays into electricity. This power generation is available to everyone and has the least impact on our environment. CO₂-free, without exhaust fumes, noise or harming animals, 10.5% of our electricity was already generated in this way in 2020.
But the sun does not always shine. No or very little solar power is generated at night and when it is very cloudy. For this reason, the further construction of solar systems will no longer contribute to the regenerative energy supply to the same extent. This is because electricity is lacking during the hours when it is dark and there is no wind.
“Dunkelflaute”, which is a German word that literally means dark doldrums or dark lull, is the name given by the energy industry for the time when neither solar plants nor wind turbines can supply electricity. During this time, coal and nuclear power plants from all over Europe have to step in and secure the supply so that no one has to sit in the dark. The CO₂ emissions per kilowatt hour are then particularly high.