What is a common requirement for PV systems regarding environmental protection?

In the context of photovoltaic (PV) systems, the requirement for them to be weatherproofed to withstand environmental conditions is crucial for their longevity and performance. PV systems are exposed to various elements such as rain, snow, wind, dust, and extreme temperatures. To ensure reliability and safe operation, components need to be designed to resist moisture ingress, corrosion, and physical damage.

Weatherproofing includes features like weather-resistant enclosures for electrical components, the use of UV-stabilized materials for module framing, and appropriate sealing techniques to prevent water intrusion. Such measures not only protect the integrity of the system but also ensure compliance with safety standards outlined in the National Electrical Code (NEC) and manufacturer specifications.

Other options may touch on relevant aspects of PV system installation and maintenance but do not address the essential need for weatherproofing as a protective measure against the elements directly impacting system performance and safety.