How frequently should shading assessments be conducted on solar?

Assessing Shading Risks and Frequency

Shading assessments are essential to maintaining the optimal performance of solar installations. The frequency of these assessments depends on various factors, including the presence of nearby structures or trees that may cast shadows on the solar panels. As a general rule, annual assessments are recommended to ensure that the system’s performance is not compromised by growing foliage or other environmental factors.

Techniques for Conducting Shading Assessments

To conduct a thorough shading assessment, start by reviewing the system’s performance data, looking for any signs of decreased energy production or irregularities. Next, perform a visual inspection of the solar panels and surrounding area to identify any potential shading sources, such as trees, buildings, or power lines. Use a tool like the “Shading Loss Factor” (SLF) calculator to estimate the impact of shading on the system’s performance. For example, if a tree with a diameter of 10 feet is located 10 feet away from the solar panel, the SLF calculator can estimate the percentage of energy lost due to shading.

Determining the Optimal Assessment Frequency

While annual assessments are recommended, more frequent assessments may be necessary if there have been significant changes in the surrounding environment. For example, if a large tree is planted near the solar installation, it may be necessary to conduct a shading assessment every 6-12 months to monitor the tree’s growth and adjust the system’s performance accordingly. By conducting regular shading assessments, solar panel owners can ensure that their system is operating at optimal levels and maximizing energy production.