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These are called "time of use tariffs". Here in Belgium this type of tariff is marketed under the name "dynamic tariff". (It's only offered by the biggest play

These are called "time of use tariffs". Here in Belgium this type of tariff is marketed under the name "dynamic tariff". (It's only offered by the biggest player Engie, but other companies are working on it.) The price varies hourly, but it is determined by the day-ahead electricity market so the price schedule for the day is known the evening before.

WalterBright 5y ago
It's a good approximation. But renewable power generation is affected by the weather, and the weather is not predictable. The price should change minute by minute. Of course, this implies people having internet-connected hot water heaters, car chargers, etc., which are hardly expensive.
- Symbiote 5y ago
  The weather across all of Europe (which is relevant for the pricing) is reasonably predictable.
  - WalterBright 5y ago
    Can it predict a day in advance every time the sun goes behind a cloud?
    - Symbiote 5y ago
      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...