> but the grid operator has to have control about how much power goes into the grid Here in Germany this works by specialised devices called "Funkrundsteueremp

> but the grid operator has to have control about how much power goes into the grid Here in Germany this works by specialised devices called "Funkrundsteuerempfänger" (rough translation: radio controlled receiver, according to Wikipedia[0] it's "radio teleswitch") [0] https://en.wikipedia.org/wiki/Radio_teleswitch https://en.wikipedia.org/wiki/Radio_teleswitch