Huawei's Backup Box provides automatic detection and switching to provide reliable backup power.
It is used in residential rooftop PV system to control inverter, grid connected or off grid. When the grid fails, the inverter switches to off-grid status and supplies power to off-grid loads in backup mode. When the grid recovers, the inverter switches back to grid-tied state.
The Box is compatible with the following Huawei inverters:
Manufacturer product number: 02406294
Weight: 14.5 kg