Solar panels always lose a small amount of their efficiency over the years—this is the natural degradation of solar panels. The extent of this degradation depends on the type of panels you have. In general, the degradation of solar panels should never exceed about 0.7% per year.

Is your solar panel yield decreasing faster than expected? First, check whether the panels have become dirty or if new shading is affecting them. For information on cleaning solar panels, click here.

Still can’t explain the drop in performance? It might be time to have one of our experts inspect your system.