thanks for all the responses and suggestions.No way this is normal behavior.
So you feed into the grid (or to house with limiter out in AC in port ) and then grid is down. At that moment it should stop feeding into the grid.
And this unit has all the certificates from around the world, so it does, tested.
Something is not right on your setup or with your unit.
Can you make a pic and diagram of your system ? (Deye will ask for it also)
Also if inverter overloads it has a timer. After that it restarts itself.
We use 230V 50Hz here. But single phase 250A ... nope. Maybe they allow 60A single phase, and then they recommend to use 3 phase (and it is like 3x one phase)
No way this is normal behavior. Maybe but I am not really surprised from my experience.
The set up is exactly in accordance with the Deye recommendation for parallel units as attached. The CT is placed as this diagram and connected to the master unit. The system operates with 'no export to CT". Total average load is 4-6 kW with max of 12 and min of 2. There is no import or export to the grid until the battery gets to 50% (between 1 and 6 am depending on how much sun ) and then the load comes from the grid until the solar can take over again. The UPS (Backup Load) is limited to 2-3 kW so that it can run for 4-6 hours when the battery is already at 50% and there is no grid power.
Might have certificates but these standards I believe only cover voltage and frequency and have long trip time delay requirements and the testing methods are basic and not simulating the type of conditions that we are experiencing.
They definitely do not reset until the grid is restored. I would also expect a timer before reset but this is not the case.
Basic 3 phase here is 3x230V in delta configuration (only benefit is that it saves on cable cost). Not possible to earth and hence no earth fault protection because this requires very sophisticated protection. We do also have 400V 3 phase star connected with neutral which is safer.