(1) Connect the ground wire to the “FG” terminal;
(2) Tighten the “FG” terminal tightly when wiring;
(3) On the other side of the grounding wire, connect it to the grounding box of the combiner box. The shorter the grounding wire, the better.
(4) The connection method of the grounding wire is as shown in the following figure:
Note: Common problems are: the grounding wire is not connected, the grounding wire is connected incorrectly, the grounding wire is not connected to the grounding of the combiner box, or the combiner box itself is not grounded;
If the grounding wire is not properly connected to the grounding terminal, communication failure, splashing, and damage from lightning strikes may occur in the main module.