Nah. It’s a standard feature of most battery systems to run when the grid is down. Solar without battery doesn’t, (and the solar itself cuts out) but if you have battery systems involved for storage, you’re already capable of them interoperating with the grid, or without it.
As for getting reference from a generator, no need. You can get all that from the batteries and they’re increasingly planned to be used for grid scale black start.
As for getting reference from a generator, no need. You can get all that from the batteries and they’re increasingly planned to be used for grid scale black start.