> My understanding is that the majority of installs are not capable (allowed?) to run when the grid is down. Capable, IIRC. I seem to remember that you need t

> My understanding is that the majority of installs are not capable (allowed?) to run when the grid is down. Capable, IIRC. I seem to remember that you need to have a type of inverter that is quite a bit more expensive (several kilodollars) if you want to be able to run disconnected from the grid. Most people opt for the cheaper inverter as there's not a lot of difference if you don't also have a battery storage system.