How often are PV systems recommended to be inspected according to Article 690?

According to Article 690 of the National Electrical Code, it is recommended that photovoltaic (PV) systems be inspected at least once a year. This annual inspection is important for several reasons.

First, regular inspections help ensure that the PV system is operating efficiently and safely. Over time, components can degrade due to environmental factors, such as weather conditions, dust accumulation, and physical damage. An annual inspection allows for timely identification and remediation of any issues that could affect performance or pose safety risks.

Second, regular assessment contributes to the maintenance and longevity of the system. By checking the electrical connections, module integrity, and inverter functionality annually, owners can ensure their systems reach their full operational life while maintaining optimal energy production.

Lastly, complying with this annual inspection recommendation helps ensure safety standards are met and can be crucial for warranty and insurance purposes.

Other options suggest either more frequent inspections, which may not be necessary for all systems, or less frequent ones, which could lead to overlooking critical maintenance needs. Thus, the recommendation for an annual inspection strikes an optimal balance between proactive maintenance and practical implementation for most PV systems.