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Huawei LUNA2000 – Backup Box-B1 for 3-phase inverters
Emergency power backup power back up
The Huawei Back Up Box is used in a residential rooftop PV system to control the inverter's connection to the power grid. When the power grid fails, the inverter switches to the off-grid state and supplies power to off-grid loads in backup mode. When the power grid is working again, the inverter switches back to the grid-connected state.