During the recent not last power shutdown in N. California.
A small winery/vineyard with so called Solar and wind power had to be shut down for an extra 3 days. That included the few neighbors on the same little grid.
Discussions with some people, who understand this issue said that bringing that little grid back on with solar, wind and PG&E was/is a complicated issue.
The owners are hard working liberals. The wife is a UC Bezerley grad, whose religion is reducing their carbon footprint.
Their two electric vehicles couldn’t be recharged and their vineyard only, old gas powered pickup can’t be driven off their vineyard as it does not meet green air standards.
Solar PV inverters must receive their source frequency from the grid.
If the grid is off, so are your inverters. It’s part of their UL rating.