It’s a bit more sophisticated than that. On a mild sunny day your local network will be saturated with PV power and the supply voltage will creep up. It’s an en

It’s a bit more sophisticated than that. On a mild sunny day your local network will be saturated with PV power and the supply voltage will creep up. It’s an enforced regulation here (Aus) that the inverters will curtail/shut down based on grid over voltage. No networking required.