None of the European countries meat their energy demands by themselves. All of them regularly import and export electricity from/to their neighbors. That's a good thing and is driving down electricity prices not up.

The reason countries buy electricity from their neighbors is because it's cheaper not because they couldn't meat the demands themselves.

Now Germany is by no means perfect, heating is largely gas based which increases emissions. Ironically the law that was trying to change this, had a big counter campaign that likely contributed to the change of government.

So while the greens energiewende are often blamed for Germanys dependency on gas (although the dependency had been going for much longer), it's the conservatives who likely had a much bigger impact on Germany sticking with gas by preventing to move heating to electricity.