Configuring the Active Power Mode


Qualified person

Starting the installation assistant

  1. Open the user interface Establishing a connection to the user interface).
  2. Log in as Installer.
  3. Start the installation assistant Starting the Installation Assistant).
  4. Select [Save and continue] after each step up until the step Grid management service.
  5. Make the settings as described in the following.

Setting the connected line conductors

  • In the tab Active power mode, select the line conductor to which the inverter is connected from the drop-down list Connected line conductors.

Make the settings for systems with manual setpoint

  1. In the tab Active power mode set the switch Grid connection point regulation to [On].
  2. Enter the total PV array power in the field Nominal PV system power.
  3. In the drop-down list Operating mode active power setting, select whether active power setting is to be performed via a fixed specification in percent or in watts.
  4. In the field Set active power limit, enter the value to which the active power at the grid-connection point is to be specified. The value must be set to 0 for zero power output.

Make the settings for systems with external setpoint

  • In the tab Active power mode set the switch Grid connection point regulation to [Off].

Activating unbalanced load limitation

Depending on the country data set, unbalanced load limitation may have already been set. In this case, check the settings.

  • If there are single-phase PV inverters in the system and unbalanced load limitation is requested, set Unbalanced load limitation to [On] and enter the maximum permissible unbalanced load in the field Maximum unbalanced load.

  • If there are three-phase PV inverters in the system, set Unbalanced load limitation to [Off].

Configuring the Active Power Mode of the PV Inverters

  1. Activate the PV inverter user interface.
  2. Log in as Installer.
  3. Start the installation assistant on the PV inverter user interface.
  4. Select [Save and continue] until the step Grid management service.
  5. Ensure that the function Active power setpoint is set to [On].
  6. In the drop-down list Operating mode active power, select the entry External setpoint.
  7. In the drop-down list Fallback behavior, select the entry Apply fallback values.
  8. In the field Fallback value of the maximum active power enter the value to which the inverter is to limit its nominal power in case of a communication failure to the higher control unit at the end of the timeout time.
  9. In the field Timeout, enter the time that the inverter is to wait before it limits its nominal power to the set fallback value.
  10. If, in the event of a 0% or 0 W specification, the inverter is not permitted to feed small amounts of active power into the utility grid, select the entry Yes in the drop-down list Grid disconnection for 0% active power setpoint. This ensures that in the event of a 0% or 0 W specification, the inverter disconnects from the utility grid and does not feed in active power.