Do you only use electricity only some hours a day?
No it’s usage need to be constant, or you'll get black-outs in regions where the grids 50hz frequency cannot be kept - which a lot of communals in Sweden are dangerously close to.
And if you don't keep the network balanced, you'll get complete blackouts instead of regional blackouts.
> That wasn't theoretical installed base, it was actual power produced
That's not what I'm saying. On a windy day, then doubling your number of wind turbines will (roughly) double your power output. But if there's no wind, your output drops to zero. Contrast that with nuclear power, where doubling capacity doubles output always.
So with nuclear power you could say that based on what current output we have, if we build X more capacity we could retire all polluting energy sources.
Doesn't Germany have a lot of wind power? Denmark sure does.
Let's see, 27.2% wind in 2020: https://en.wikipedia.org/wiki/Wind_power_in_Germany
And apparently there's a fair bit of North Sea area that can be used for new offshore wind.