SMA America, LLC
Connecting External Sources
Technical Description
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3. Connect the positive pole of the BatVtgOut connection to the second contact of the same
auxiliary contact on the transfer switch.
An auxiliary contact is used because the Sunny Island must ”know” whether it is connected to the
public grid or whether it must manage a diesel generator.
To enable such a kind of operation, you must set the ”231.06 ExtSrc” parameter to ”GenGrid”
(see section 8.2 ”Starting the Quick Configuration Guide (QCG)” (page 66)).
Settings Performed on the Generator and Grid
All the settings made for the generator and grid in the sub-menus also apply to the
”GenGrid” selection.
