It's showing live data. Being nighttime, there is currently no solar generation. If you click on the country and look at the little last 24 hour visualisation y

It's showing live data. Being nighttime, there is currently no solar generation. If you click on the country and look at the little last 24 hour visualisation you can see solar production peaking at 23% yesterday in Germany. https://www.electricitymap.org/zone/DE https://www.electricitymap.org/zone/DE