Today I conducted a SolarEdge Inverter automated shut down test, basically if the grid fails (so we're running off grid) the system needs to reduce power when the batteries are full and solar production exceeds demands, if it doesn't then the batteries are used as a soak until the BMS cuts off due to exceeding the maximum voltage, at that point the inverter will shut down.
Unfortunately I was busy packing a parcel and wasn't keeping an eye on the state of charge, and it had got to 99%, the solar was generating circa 6kW, so I needed to drop the SOC to about 90%.
Washing machine was on, both ovens was on, kettle was, microwave was on, and I put the twin draw air fryer on, cue about 11kW of draw and minimal grid draw - just noise as the solar went up and down.
Anyway I managed to get the battery down to 90% and after turning all the extra loads off apart from the washing machine I flicked off the grid supply.
Now I thought the system would close down the SE Inverter at 95% SOC charge (there doesn't appear to be a setting for this), but it didn't, it kept going, then the garage PV shut down at 99%, leaving the house system going, that shut down at 100% and the garage system came back on at a reduced output to cover loads.
So the experiment was successful and proves the system does what its supposed to.