Which standard must the electrical portion of solar PV systems comply with?

The electrical portion of solar photovoltaic (PV) systems must comply with NFPA 70, also known as the National Electrical Code (NEC). This standard is critical because it provides guidelines to ensure safe electrical installations, including those related to solar power systems.

NFPA 70 establishes minimum safety requirements for electrical systems to minimize the risk of electrical hazards. It covers various aspects such as wiring methods, grounding, overcurrent protection, and safety labeling, all of which directly apply to the unique requirements of PV systems. Compliance with NFPA 70 ensures not only the safety of the installation but also the efficiency and performance of the solar energy system.

The other standards mentioned do not specifically address the electrical safety and installation practices required for solar PV systems. IEEE 123 focuses on power quality and electrical measurement techniques, ASTM D6483 pertains to fiberglass-reinforced plastic used in solar modules, and ISO 9001 relates to quality management systems without focusing specifically on electrical safety standards for solar installations.