Grounding and Methods of Earthing in PV Solar System
This article covers grounding in PV systems, which differs slightly from standard grounding systems. The concept and purpose of grounding in DC systems, such as solar panels and
As PV system configurations evolve and new equipment comes on the market, equipment and system grounding protocols may also need to be updated. For example, microinverters and AC PV modules have different grounding requirements than other PV systems.
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.
IEEE Std C62.92.1-2000, IEEE Guide for the Application of Neutral Grounding in Electircal Utility Systems – Part I: Introduction. 4. IEEE Std C62.92.4-2000, IEEE Guide for the Application of Neutral Grounding in Electircal Utility Systems – Part IV: Distribution. 5. National Electrical Code Handbook 2011, Article 450.5 Grounding Autotransformers.
Electrical systems in the U.S. (including PV systems) are generally solidly grounded to limit the voltage with reference to ground during normal operation, and to prevent excessive voltages due to surges from lightning or unintentional cross connections with higher voltage lines.
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