[ezzaf]

> but no one in anywhere near the ability to store energy for a whole country for weeks in cold countries, when days are very short and wind can just decide to stop blowing

Sure they do, the storage is just called hydroelectricity. There are parts of the world (eg Tasmania) with months of energy storage.

For the realised cost of nuclear and construction timeframe of nuclear, you could build a resilient supply with a distributed transmission grid and a mix of batteries and pumped hydro.

[tinco]

Did you pick Tasmania because it is just about exactly on the other side of the planet of Ontario? Are you going to pump the hydro through the earths core? Months of energy storage for ~500.000 Tasmanians is like a day or two for the ~15 million Ontarians.