What is a requirement for solar panels and metal equipment in roof-mounted PV systems?

• A. They must have a waterproof coating.
• B. They must be bonded and grounded.
• C. They should be painted white.
• D. They can be left unguarded.

Answer: (B)

Bundling and grounding are critical safety requirements for solar panels and metal equipment in roof-mounted photovoltaic (PV) systems. This practice ensures that any potential electrical faults that may occur are safely redirected to the ground, preventing electrical shock hazards, equipment damage, and reducing the risk of fire. Proper bonding connects all metallic parts to ensure they are at the same electrical potential, which further enhances safety.

The necessity for bonding and grounding is stipulated in electrical codes and standards relevant to solar installations, such as the National Electrical Code (NEC). These regulations are in place to protect users and maintain system integrity over time, especially in environments subject to weather conditions and physical wear.

Other options, while they may seem relevant, do not capture the primary concern of electrical safety and compliance as effectively. For example, waterproof coatings may be beneficial for protection against the elements, painting panels white helps in managing heat, and guarding is typically not a requirement for operational safety as long as the installation adheres to bonding and grounding protocols.