Very nice article with good graphs, many thanks.

As for the long-term storage of electrical energy in batteries (Li-ion I suppose), there is only one snag: they loose their charge over time. So some of the energy stored over summer may not be there any more in winter.

Should you be interested, I have carried out a similar analysis for UK homes powered by wind, both in terms of annual energy balance and instantaneous power balance, https://peter-wurmsdobler.medium.com/could-wind-farms-power-every-uk-home-by-2030-energy-analysis-396e1bfa5ab8 and https://peter-wurmsdobler.medium.com/could-wind-farms-power-every-uk-home-by-2030-power-analysis-e920ff5b5ee2, respectively.