How does the "back up mode" work of my X1-Hybrid-LV?

This mode is applicable to countries other than Pakistan.
This mode uses the energy storage system as a backup power source and is suitable for applications where power outages are frequent. When the grid is normal, the load is powered by solar and the grid, and the battery is only charged without discharging. When there is a power outage, the energy storage system works in off-grid mode to supply power to important loads.
The load is prioritized to be powered by solar. If the solar power is insufficient, the load is powered by the grid. If the grid is unavailable, the load is powered by the battery + solar in off-grid mode.
If the PV power is greater than the load power, the excess power charges the battery.
After the battery is fully charged, the excess PV power can be either fed back to the grid or limited based on the zero-export setting.