Grounding Wire Configuration in Solar Inverter
The wire should be properly sized, securely fastened to the inverter''s grounding terminal, and routed directly to the grounding point
A grounding wire of 6 AWG must be connected to the grounding terminal on the inverter and connected to a single-point grounding connection wire. If there is no suitable grounding connection point, then the grounding wire from the inverter must be connected to the negative terminal of the battery bank for off-grid systems.
Modern grounded inverters and PV arrays are not isolated from the grounded output circuit of the inverter. In this scenario, the equipment grounding conductor (EGC) of the PV circuit can be connected to the grounding terminal of the inverter, which is eventually connected to the AC grounding system and electrode within the premises.
The equipment grounding conductor (EGC) from the main panel and PV arrays are connected to the Ground terminal and Ground bus in the inverter. Both grounding electrode conductors (GEC) are connected to the individual grounding rod used for both systems.
Disconnect the grounding point when connecting the inverter to a power distribution panel that already has grounding. Avoid double grounding the inverter as it can potentially lead to issues. The grounding requirements for grid-tied systems may differ among countries and states and are determined based on local codes and regulations.
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