Specifically alot of the laws on Windpower. Where it has to be amount x away from any populated place. Meaning there is only something like 0.1% of the area of Germany where you would be allowed to built Windparks.

My bad on the EEG i thought that stopped since I do not pay it anymore directly.

I doubt wind laws expansion makes it that expensive. Laws were recently liberalized anyway.

But there are many more cost factors. With co2 tax, gas and coal firming are getting very expensive. Add to that massive transmission and distribution expansion/upgrades costs for distributed grid, add massive curtailment costs and you get what you get