Backup mode

Parameter

Explanation

Backup mode

Displays the backup function selected during the installation.

Not activated:

No backup function has been selected.

Manual changeover:

A manual KOSTAL BackUp Switch has been fitted in the house installation which can be used for the backup function if there is a power failure.

Automatic changeover:

An automatic changeover box has been fitted in the house installation which can be used for the backup function if there is a power failure.

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

Failure detection

Here select when the inverter is to report a phase failure and subsequently start backup mode.

1-phase: Phase failure detection of just one phase.

3-phase: Phase failure detection of three phases.

Start SoC for backup mode (%)

If the backup function is to be used, ensure that there is a reserve in the battery so that backup mode can be started should the power fail. For this to happen, the value selected for Min. state of charge and Min. state of charge in the alternative time period should not be less that the start SoC for the Start SoC for backup mode.

Example:

  • Min. state of charge (SoC): 50 %
  • Start SoC for backup mode: 40 %
  • Permit discharge in backup mode down to: 10 %

Backup mode can only be started once the battery has reached the set Start SoC for backup mode.

If the battery SoC is below the set value, backup mode is not possible. In this case, the battery is initially charged from PV.

Permit discharge in backup mode down to (%)

The battery is discharged to the set value.

The value must be below the value for Start SoC for backup mode. Backup mode is retained up until this value. Below the set value, only the inverter is powered by the battery to ensure readiness for backup mode.

For backup mode, we would recommend planning a reserve for the battery’s minimum battery SoC (e.g. 10 %) so that the battery does not enter deep discharge and the system does not shut down.

NOTE! Should the battery SoC fall below the permitted minimum SoC for the battery (depends on battery, usually 3%), the battery is disconnected from the inverter and the storage system shuts down to protect against deep discharge. When this happens, the battery must be manually switched back on again as soon as there is sufficient PV power.

Use sleep mode

Deactivated: Sleep mode is only activated when the battery is in deep discharge. The battery remains available for as long as possible and is ready for backup mode.

Activated: Sleep mode is activated when the storage unit has been discharged to the set min. SoC. If sleep mode is active, the battery may not be available for backup mode.