>They anticorrelate in some locations. In others, they don't. Here in Finland in the winter you get effectively zero sun.

Virtually nowhere gets zero sun.

Finland is also unusually blessed with tons and tons of hydropower potential which functions both as a battery as well as power generation.

As well as a very low population density.

It is also possibly the best advert for not using nuclear power ever given the disaster of recent projects (e.g. EDF cost overruns).