Existing Huawei with anti-island protection and add vitron and batteries

Hello, I am designing a way to add a multiplus II in ESS mode with a Huawei sun2000 5ktl that has an anti-island protection system already installed.
The operation would be as follows: if there is a power outage, the device would lower the circuit breaker automatically and would give the order to the Huawei to work in island mode (regulating production to the existing loads), if there was tension in the panels, it would start the device again. victron feeding if there is voltage in the battery at all loads.
If there was no voltage in the panels, the critical loads would continue to be powered through the batteries.
When the voltage recovered, the device would raise the circuit breaker, recovering the normal operation of the installation.
Because searching, I have not found this cause, I ask the experts for help as to whether this system would work well. Photo attached.
Thank you very much in advance.