SMA SUNNY BOY 3.8-US Instructions D'installation page 59

SMA Solar Technology America LLC
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].
Setting PV inverter feed-in management
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] after each step up until the step Configure grid management
service.
5. Ensure that the function System control and power limitation is set to [On].
6. In the drop-down list Operating mode active power, select the entry Active power
limitation P via system control.
7. In the drop-down list Operating mode for absent system control, select the entry Use
fallback setting.
8. In the field Fallback active power P, enter the same value as the one entered for the battery
inverter. Where necessary, convert this value into a percentage. This ensures that in systems
with Sunny Home Manager, the correct fallback value will be adopted in the event of a
communication breakdown between Sunny Home Manager and inverter.
9. In the field Timeout, enter the time that the PV 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 PV 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 at zero export. 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.
Installation Manual
7 Commissioning
SBSxx-US-10-IA-xx-11 59