[yourMadness]

Some of that is lost due to regulatory 70% limits during peak times.

Also the rated capacity is for some synthetic sun conditions. I have no idea what's the conversion factor between ideal sun in Germany and the PV rating sun.

[smodo]

Then there is the fact that many installations are explicitly using small converters, not all installations face the same way (east-west setups are a big thing for farms and other large scale setups). I live right next to Germany and getting 80% of your installed capacity is considered optimal.