As of February 2022, the WA Government introduced some new rules for solar systems installed after March 14, 2022. These measures allow network operators to take control of (turn off) private and business inverters, in order to stabilise the grid if demand on the grid becomes too low.
These rules apply across the industry, and are measures put in place to be used in emergencies only, to prevent widespread blackouts and to allow the continued uptake of solar in WA.
You can read more in our article about the updates here:
https://www.plicoenergy.com.au/blog/new-wa-emergency-solar-rules