Rick Rickst29 on January 31 2021 said:
I know a bit about Inverter technology. When the Grid is presenting a stable frequency clock to attached DC-->AC inverters (attached to Solar Panel Arrays, and to Large Battery storage systems) and to AC-->AC Converters involved in some grid-direct wind systems, the inverters and Converters very quickly adapt their outputs to match the 50 Hz AC supply frequency and phase, as presented by the Grid. (60-cycle in the USA in some other countries, of course)
That is a basic requirement imposed on all grid connected Inverters (including my own).
There is insufficient battery capacity to run grid loads from battery storage (alone) through the night in any large region of the Grid. While a Battery Array is able to provide energy at the correctly inverted frequency phase (SEE ABOVE), its inverters will provide that energy in-phase. If you try to overrun the battery, it should shut down. That Grid demand must be pulled in from elsewhere, or demand itself must be modified using brownouts and scheduled shut-off of compatible "smart devices" which can handle a power-off State for some period of time