Yes, the units are correct. But currently Germany is generating 33 GW of solar power (according to electricity maps). Therefore the 17GWh is generated after 0.5

Yes, the units are correct. But currently Germany is generating 33 GW of solar power (according to electricity maps). Therefore the 17GWh is generated after 0.5 hrs. For a whole week this value is way too low, even if it was a cloudy week (which it wasn't).