Settings for forecast-based battery charging
Forecast-based battery charging is based on the production and consumption forecast of your smart home. The settings for charging a battery are only displayed for systems with a battery.
Setting | Explanation |
|---|---|
Forecast-based battery charging | To create a battery-charging forecast for the next 48 hours, the Sunny Home Manager uses the current day and the two following days by default.( > Configuring the forecast-based battery charging) |
Required battery state of charge (SOC) in terms of forecast-based charging | Disables the forecast-based charging until the battery is charged to the specified % value (SoC = State of Charge). If this value is reached, the Sunny Home Manager enables forecast-based battery charging function. This configuration may lead to derating losses. |
Prioritized battery charging | If you activate this function, the battery charge is prioritized over an optional load that you have defined ( > Activating Prioritized Battery Charging). |
Shortened forecast period | Shortens the default forecast period from a maximum of 48 hours to the current day. This allows more PV energy to be loaded into the battery on the current day. This configuration may lead to derating losses. |
Two cases can be distinguished for forecast-based battery charging:
Case 1: System with PV inverter and battery inverter or PV inverter and hybrid inverter
The forecast-based battery charging function ensures that the otherwise curtailed PV energy is stored in batteries when effective active power limitation is configured in the system.
Case 2: System with 1 hybrid inverter and overdimensioning of the PV system
When using a hybrid inverter, the PV system can be overdimensioned. The installed nominal DC power of the PV modules is greater than the nominal AC power of the inverter. The forecast-based battery charging function ensures that the battery is preferentially charged when the highest PV power is expected, for example at midday. This allows the total output of the PV system to be optimally utilized.
A maximum of 1 hybrid inverter may be installed to use the forecast-based battery charging function for DC oversizing. No other PV inverters may be installed.
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