In the event of a power cut, a large portion of the grid is not energised & this area is called an island. If the solar panel continuously pumps power into this non-energised portion of the grid, it gives rise to the possibility of electrocution to anyone in close contact with the panels. In order to sidestep this risk, the inverter, usually, turns the PV asset off during a power cut.
So it is quite clear that the only real factor that is hindering a solar panel’s ability to produce power in the event of a power cut is the type of inverter being used.
There are inverters which completely depend on the grid - this won't work as it depends solely on the grid to provide reference voltage; another inverter is which is fully independent of the grid - this would work as it is designed with battery backups and diesel generators. Best option is bidrectional solar inverters, they are one stop solution for solar panel related problems. This type of inverters is desgined to cater every possible problem that can arise i.e. reference voltage, power failure and also curbs islanding of the panels.
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As far as I know solar panels are not completely independent of the area's power grid, but depending on the inverter it might just work out. Thoughts?