The solar eclipse on the 20th of March 2015, is putting the European power grid to the test. Especially countries with a high proportion of installed solar power capacity – like Germany, France and Italy – are facing the task to balance their power supply system correspondingly.

Approximately 10 gigawatt of solar power capacity could drop out, when the eclipse starts towards 9:30a.m. Yet, once the sun reappears around noon, up to 20 gigawatt of solar power could be fed into the power grid within a very short time period. These uncertainties are a great challenge for the demand side management of the European power grid.