The Backup Box B1 for Huawei Three-Phase Inverter is a device that provides emergency power supply to the inverter with the energy stored in the batteries in the event of a mains power failure.
In the event that the connection to the mains power supply line is lost, the hybrid inverter would be disconnected and would not provide electrical energy to the load to be supplied. The backup is responsible for restarting the inverter with the energy stored in the batteries, providing electrical energy to the installation.
Once the power supply from the grid returns, the inverter returns to its normal operation. These devices are mainly used in residential buildings where there is a communal photovoltaic installation.
*The B1 Backup Box for Huawei Three-Phase Inverter is only available for SUN2000-3/4/5/6/8/8/10KTL-M1 inverters.
For more information, check the Huawei Guarantee Policy