Grounding for solar PV systems in the United States is primarily governed by NEC Article 690, specifically sections 690. These sections should always be read alongside NEC Section 250, which covers general grounding and bonding requirements. Grounding connects electrical components to Earth at zero voltage potential. It is a mandatory practice required by NEC and IEC codes to protect both equipment and personnel from damage and electric shock hazards. This article covers grounding. This process involves two distinct but related concepts: system grounding, which provides a reference to earth for the electrical system (stabilizing voltages and assisting in clearing certain faults), and equipment grounding, which bonds all normally non-current-carrying metallic parts to provide. For solar developers, EPCs, and asset owners, grounding has evolved from a regulatory requirement into a core engineering risk-control strategy. This industry analysis examines how solar PV grounding works, where minimum compliance falls short, and how advanced grounding practices deliver. Proper grounding is the foundation of any safe and reliable solar photovoltaic (PV) or energy storage system (ESS). For professionals working in the global energy market, navigating the two dominant.
