Only 10% of households are currently using off-grid solar products. In Benin, only 40% of the population has access to electricity, with a significant disparity between urban (70%) and rural areas (18%), resulting in about five million people without access to electricity. You can watch an installation video here and find the current data sheet in the download centre.Around 600 million people lack access to electricity in sub-Saharan Africa, despite some progress over recent years, and the strong growth of the continent’s off-grid solar sector during the last decade. This can be connected to the corresponding circuits of the house that are to be supplied with emergency power in the event of a failure of the public power grid.

In the Backup Box, there is an outlet for the single-phase emergency power. The Backup Box is connected between the AC supply line of the inverter and the house distribution. How is the Backup Box integrated into the system? Accordingly, the SUNKTL-M1 three-phase inverters are compatible with the Backup Box-B1, which is also three-phase. 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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