Every solar inverter / microinverter manufactured in the past two decades (if not older) must monitor the grid voltage+frequency and disconnect if it falls outside of a certain tolerance. If things go out of tolerance there is a defined period of time where it must recover or the inverter is required to trip out. There are also hard safety limits that cannot be exceeded whatsoever. I am not aware of any conditions that would result in overvoltage.

In CA as of (IIRC) 2021 these systems must be hooked up to some kind of online monitoring so the utility can temporarily command them to exceed tolerances. If the grid is going unstable due to load the last thing you want is everyone's PV system tripping off making the supply situation worse. So the utility can inform the system to exceed the normally tight tolerances by a larger deviation. They can also command PVs systems to shut off but there are strict limits on how often and how long they can do that and it must be driven by grid stability needs.