Tibber is starting their grid reward system in Sweden and Norway and it's awesome. Your car battery starts to serve as virtual controllable excess storage for the grid and you get paid to provide it as such.
There's a German article about it: https://www.heise.de/news/Tibber-Wallbox-Netz-verkauft-verteilte-Regelenergie-9695619.html and I also found a really great short explainer video, which seems to be unintentionally listed on the Youtube channel of the voice actor and not Tibber, so it might not be fully official yet :) https://www.youtube.com/watch?v=m4lYV8utCMM