Backup function

If a battery is connected to the inverter, the inverter provides the option of continuing to supply the house grid with energy using the PV and battery should the mains supply fail.

For this purpose, a manual or automatic backup box must be installed in the house grid at the grid connection point.

As a manual variant, KOSTAL provides the KOSTAL BackUp Switch (three-phase) and the KOSTAL BackUp Switch MP (single-phase), which disconnects the public grid from the house grid in backup mode.

KOSTAL offers the KOSTAL Auto BackUp Switch (three-phase) and the KOSTAL Auto BackUp Switch MP (single-phase) as automatic versions. In the event of a power cut, these switch off the mains supply fully automatically.

In addition, automatic backup boxes are available as accessories from other suppliers.

Please note that, in the case of a three-phase grid, a three-phase backup switch must always be used (KOSTAL Auto BackUp Switch or KOSTAL BackUp Switch), even if a single-phase inverter such as the PLENTICORE MP G3 is used.

You will find a list of approved KOSTAL Solar Electric accessories on our website in the download area for the product.