Setting up Forecast-Based Battery Charging

Preliminary considerations and requirements:

  • To calculate the expected PV generation, the exact input of the system location (latitude, longitude, altitude) ( > Changing System Data) as well as the nominal system power (string configuration) ( > Configuring Strings) are required.

  • In order to optimize the energy costs, the feed-in tariff and electricity tariff must be entered ( > Entering the Feed-In Tariff and Electricity Tariff) .
    The criteria according to which the costs are to be optimized must be set in the optimization target ( > Setting the Optimization Target).

  • "Learned" energy balance data (at least load profile of the past 14 days) should be available.

  • If the local grid operator requires a limiting of the active power feed-in (e.g. 70%), this must be specified here ( > Configuring Limitation of Active Power Feed-In).

  • As the battery should always be able to start up when energy is needed but also not being produced by the PV system, it makes sense

    • to specify the time period as liberally as possible.

    • to configure the battery as an optional load, but with a higher priority than a load with a lower power (e.g. washing machine or dishwasher) ( > Setting the Priority of the Load).

  • So that the battery still has capacities during PV generation peak periods (e.g. midday peak) and curtailment can be avoided, a percentage value for the state of charge should be specified, from which the Sunny Home Manager should consider other loads before the battery continues to charge.

Procedure:

  1. On the configuration page PV system properties under the tab PV system data check the setting of the PV system location entry and adjust if necessary.
  2. On the configuration page PV system properties under the tab String configuration check the string configuration and adjust if necessary .
  3. On the configuration page PV system properties under the tab Parameters check the following settings and adjust if necessary:
    - Feed-in tariff and electricity tariff
    - Limitation of active power feed-in
    - Optimization target
  4. On the configuration page Load overview and planning select the load and configure the Load properties:
    Use the slider to set the Priority of the Load.
  5. On the configuration page Device overview select the Sunny Home Manager and call up its Device properties.
  6. In the area SMA Smart Home settings make the following settings:
  7. In the EEBUS protocol field place a checkmark: Active
  8. If the active power limitation of the system is active, in the field Forecast-based battery charging place a checkmark: Active
  9. In the field Required state of charge (SOC) for forecast-based charging, change the preset value from 0% if applicable (e.g. to 60%).
    The set value indicates the percentage of the battery charge that must be reached before the Sunny Home Manager activates the forecast-based battery charging function, i.e. up to this value the function forecast-based charging is deactivated.
  10. In the field Prioritized battery charging place a checkmark: Active
    If you enable this function, the battery charge is prioritized over an optional load, such as a heating rod, that you have defined.

    Objective and Background Information
    Heat Pumps with SG-Ready Interface