The article suggests the problem is that rooftop solar has taken off to the point that it may overload the grid if the community solar farm continues generating also. Does this mean there is no kill switch so-to-speak on the rooftop generation? This bothers me.

Sounds like they’re one Carrington Event shy of a major disaster where everything gets fried, since the best defence against that would be to kill the grid altogether until it passes. But if they are unable to do so—if these rooftops keep the voltage up no matter what—everything that’s plugged into the wall could get blown out.

My parents had a property that survived a hurricane. But when the local utility tried to restore power, there was a big surge. When they got back to assess damages, they were surprised to find the neighbours (who had their key) using the fridge because it was apparently the only one on the street that still functioned. They had unplugged it before leaving.

So, not exactly the same situation, but it illustrates the point that utilities really need to stay on top this sort of thing.