How to Ensure Longevity and Maximum Yield in Solar Farms: O&M Standards and Technologies

Solar energy systems, especially large-scale solar farms, represent a significant long-term investment. To ensure the return on this investment and the stability of the system's operation throughout its intended lifespan, diligent and regular Operation and Maintenance (O&M) is essential. Without a professional O&M approach, a solar farm can lose up to 30% of its potential capacity, reducing income and increasing the payback period.

An effective O&M programme prevents costly repairs, minimises downtime, and helps maintain system efficiency, thereby extending its economically viable service life.

To ensure quality and safety, solar farm O&M processes must comply with internationally recognised standards. In Latvia, the standard LVS EN IEC 62446-2:2020 “Photovoltaic (PV) systems. Requirements for testing, documentation and maintenance. Part 2: Maintenance for systems – Requirements for operation and maintenance” is crucial in this field.

This standard defines the minimum requirements for the operation and maintenance of PV systems, including regular inspections, performance analysis, and documentation upkeep. Adherence to the standard is fundamental not only for optimal operation but also for meeting insurance and financing requirements.

One of the most frequently requested O&M services is solar panel cleaning. Dirt, dust, bird droppings, and pollen can significantly reduce panel efficiency, creating "hot spots" and causing long-term damage to the panels. By using robotic cleaning systems with filtered water, a high degree of cleanliness is ensured, without using abrasive or chemical agents that could damage the panel surface.

Maintenance of the park area is also important. Growing vegetation can create shadows on the panels, reducing their performance, and also pose a fire hazard. Regular mowing and vegetation control are an integral part of the park's longevity.

Modern technologies offer significant advantages in defect detection. Thermal drone inspections with high-resolution thermal cameras allow for rapid and precise identification of problems not visible to the naked eye – for example, damaged diodes, cell cracks, connection defects, or even manufacturing faults.

Following the inspection, a detailed report is prepared, which includes visual and thermal imaging, precise defect localisation, and performance analysis. This report is available to clients on the intuitive dronepv.eu platform, allowing for effective planning of repairs and prevention of potential power losses before they become critical.

Continuous performance monitoring is essential to timely detect any deviations from optimal operation. Using modern monitoring systems, production data, voltage, current, and temperature can be tracked in real time. If anomalies are detected, immediate action can be taken.

Preventive maintenance, based on monitoring data and periodic inspections, includes not only cleaning and defect rectification, but also regular electrical connection checks, functional tests of inverters and other components, as well as earthing system inspection. This proactive approach helps maintain park efficiency at the highest level and reduces the risk of unexpected downtime.