ivanche parent
Is it even possible for a private person to pay market price instead of a fixed price?
Market price + VAT + a subscription paying for the grid and utility's benefits, yes.
I believe that already exists in Nordic countries, I had heard of it in Sweden ([1] says 10% of the population uses it) and Norway ([2] quotes 75% of the population).
[1]: https://swedenherald.com/article/so-you-should-think-about-e...
[2]: https://www.sciencedirect.com/science/article/pii/S266695522...