Unfortunately, you seem to have misread the report you quoted. Germany's not-so-secret is lignite, a dirtier kind of coal supplying 16.8% of its electricity. Lignite together with traditional coal at 7.3% supplied 24.1% of Germany's electricity. [0]

[0] https://strom-report.de/germany-power-generation-2020/

And steadily declining year on year. The next government is likely to feature the green party and possibly even a green party prime minister. IMHO that will set in motion an accelerated shut down of lignite and coal, which only narrowly got averted by the CSU in the current government (the CDU looked more likely to compromise on this). Even so, it will likely take a while.

Otherwise the headline here is that renewables are already the dominant source of energy in the German market. Gas is the only thing growing in market size currently other than renewables and that's mostly just offsetting the decline of coal and nuclear. Overall, renewables grow faster. Otherwise, many EV owners also put solar on their roofs and/or buy power from renewable sources or charge at public chargers hooked up to renewable sources. So, the notion that EVs are powered by coal is very dated at this point.

Lots of reasons to expect accelerated lignite shutdown and solar/wind buildup indeed. And quite impressive to see that 50.5% of Germany's electricity production was wind, sun and water already!

I didn't know the German political system had a prime minister. What's the role of the prime minister, and how does it relate to the chancellor and to the president?