![]() ![]() The single-phase Backup Box-B0 is compatible with the single-phase inverters of the Huawei SUNKTL-L1 series. ![]() What is the difference between the single-phase and the three-phase Backup Box? A single-phase supply from the Backup Box is thus possible. The Backup Box is necessary to continue to guarantee the emergency power supply in the event of a grid failure, as it separates the home from the public grid and therefore no power can be fed into the public grid. Inverters are grid-tied, which means that if the power from the public grid fails, then the inverter can no longer be active. Is a Backup Box necessary if I have a storage system? Reliable emergency power supply even in the event of a power outage.When the grid recovers, the inverter switches back to the grid-tied state. When the grid fails, the inverter switches to the off-grid state and supplies power to off-grid loads in backup mode. The Backup Box is used in a residential PV system to control the inverter’s grid-tied or off-grid states. ![]()
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