[belorn]

Those sounds interesting and is likely a nice achievement, but averages really hide the critical information here. What was the min and max, and how did they deal with periods of low supply?

Denmark is a nice example why this matter. During optimal weather their wind power produce around twice their local demand. However, in terms of actually consumption each year they need to import about 50% of their total amount of energy. This despite the fact that they export more energy than they import. The only way that would make mathematically sense is if export and import occur during different periods over the year.

This has multiple issues. The biggest being that they are heavily dependent on nearby countries fossil fueled power plants. A secondary problem is that prices they get for exports are low, since optimal weather conditions means a general surplus of energy in EU, while periods of bad weather results low supply and very high import costs. Their exports do not pay for their imports, despite exporting more than importing (in terms of energy, not money).

One can not remove the word averages and conclude that they ran fully on solar/wind/storage for 10+ days. It would be the same as saying that Denmark is running fully on wind a decade+.