> I obtain the remaining (night-time) energy from a 100 % renewable provider

I'd be curious to know how that particular sausage is made. Batteries? reversible dam? Or certificates?

> France is already overheating their rivers and Germany has to fill the gap, whenever they have to shut down too many their plants.

I would advise you to look into the details of energy exports in Europe, because that is not matching with public datasets.