The good news is, if you limit running the AC during daytime, it is easy to power them with solar energy, as the need for AC implies a lot of sun shine. These days the German grid is powered between 30-40% by solar only. And one would expect this percentage to raise quickly in the next years. Of course, if you are a home owner, you could run your AC directly by your solar, completely removing any network impact (and consequently any additional carbon output).

Pretty sure Germany runs on wind solar and nuclear.

So no feedback loop

> Pretty sure Germany runs on wind solar and nuclear.

Nuclear is pretty much dead. Unfortunately, nuclear was considered much worse than coal couple of years ago (and is still) so shutting down nuclear had and has priority.

As for wind, solar and water: Most of the time, it is utilized 100%. Every extra consumer of power means more coal or gas has to be burned.

Germany is phasing out of nuclear, only 7 plants left. They use solar and wind energy, combined with coal.

They can't produce enough with solar and wind so they have to keep burning coal which produces even more CO2.

Not sure why you're downvoted. This is true. Here in Boston my electric bill is a factor of three higher during the peak heat months.