I didn't think of that (not much solar power in Denmark...) but my feeling is that it isn't really relevant on the scale of a country -- clouds move across many

I didn't think of that (not much solar power in Denmark...) but my feeling is that it isn't really relevant on the scale of a country -- clouds move across many PV sites, covering one panel as they uncover the adjacent one. The graphs at the start of this paper show fluctuations on 9 PV power plans in a 50km square, 49 plants in a 250km square, and 225 plants in a 500km square. https://solargis2-web-assets.s3.eu-west-1.amazonaws.com/public/publication/2014/7e83f59297/Suri-et-al-SASEC2014-Cloud-cover-impact-on-PV-power-production-in-South-Africa.pdf https://solargis2-web-assets.s3.eu-west-1.amazonaws.com/publ...