Limitation of Active Power Feed-In to 0% or 0 W

Some grid operators permit connection of PV systems only on condition that no active power is fed into the utility grid. The PV energy is therefore consumed exclusively at the place where it is generated.

During the limitation of active power feed-in to 0% or 0 W, it must be ensured that the active power currently generated by the PV inverters is controlled in such a way that it equals the power currently being consumed in the household. If, in this situation, an active load in the household is switched off, the inevitable active power feed-in will be reduced to a value less of than 2% of nominal PV system power within a reaction time of 1.5 to 2.5 seconds. This means that PV systems can be created with 100% self-consumption.

The following products enable the limitation of the active power feed-in to 0% or 0 :

  • Sunny Home Manager from firmware version 1.11.4.R

    From firmware version 1.13.X.R of the Sunny Home Manager, battery inverters are fully supported.

  • Sunny Boy Storage 2.5 from firmware version 02.02.01.R

  • Sunny Boy Storage 3.7 / 5.0 / 6.0

  • Sunny Island of the device type SI4.4M-12 / SI6.0H-12 / SI8.0H-12 / SI4.4M-13 / SI6.0H-13 / SI8.0H-13

  • Sunny Tripower 5.0 / 6.0 / 8.0 / 10.0 Smart Energy

For that, the following requirements must be met when installing the PV system:

  • In the event of an interruption of the communication for system control, the PV inverters must be capable of limiting their active power feed-in to a predefined value (see PV inverter documentation).

  • A Sunny Home Manager 2.0 or an SMA Energy Meter must be used to measure grid purchase and grid feed-in power levels at the grid-connection point.

  • Configuration of the active power limitation settings to 0% must be done by a qualified person.

  • For proper and fast control, a time interval of 200 ms must be set in the SMA Energy Meter or Sunny Home Manager 2.0.

    General Power Control
    Avoiding Unbalanced Load