Battery manage-
ment
Battery charging / discharging limits:
The battery charging / discharging limits can be set "automatically" or "manually".
If they are set automatically, suitable values are selected for the battery.
If they are set manually, values can be set in the "Max SoC" (maximum state of charge)
and "Min SoC" (minimum state of charge) fields. The range of values that can be set dif-
fers depending on the battery.
Attention: The settings must be agreed with the battery manufacturer! Fronius accepts
no liability for damage to third-party batteries.
Battery control parameter:
With the aid of time-dependent battery control, it is possible to prevent or limit charging/
discharging and specify a defined value for charging/discharging.
The battery is affected by external factors, such as calibration charging, permitting AC
charging, inverter power limitation, control parameters via Modbus or self-consumption
optimisation. The battery control parameters have the second lowest priority after the
self-consumption optimisation and these may not be met due to other specifications.
Without battery control parameters, the system optimises for best possible self-consump-
tion. The self-consumption falls when battery control parameters are defined.
The following values can be selected from the "Regulation" column:
-
Max. charging power
The battery is charged at most up to the power set in the "Power" field
-
Min. charging power
The battery is charged up at least to the power set in the "Power" field
-
Max. discharging power
The battery is discharged at most up to the power set in the "Power" field
-
Min. discharging power
The battery is discharged at least to the power set in the "Power" field
The days and times when this regulation applies are defined in the "Weekday" and "Time
range" columns. A time range that spans midnight cannot be set.
Example: Two entries are needed to set a parameter of 22:00 to 06:00: '22:00 - 24:00'
and 00:00 - 06:00.
Examples of battery control parameters can be found in the next section.
Calibration charging (only for Fronius Solar Battery)
At regular intervals, the Fronius hybrid inverter automatically charges the Fronius Solar
Battery until it is full for the purpose of calibrating all the components. This process can
be started manually here.
IMPORTANT!
When calibration charging is activated, normal operation is interrupted and
the system may draw energy from the DNO grid. The process can take several hours
and cannot be aborted.
Once calibration is complete, the system automatically reverts to the operating mode that
was set originally.
This calibration charging process is also performed automatically during actual operation
after a number of charging and discharging cycles.
If the "permit battery charging from DNO grid" setting is deactivated, this calibration char-
ging process relies exclusively on energy from the photovoltaic system. Depending on
the insolation conditions and size of the systems concerned, the charging process can
take a very long time.
If the "permit battery charging from DNO grid" setting is activated, the calibration char-
ging process is performed by drawing a constant current from the photovoltaic system
and the DNO grid.
105
EN
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