The presence of white spots on solar panels typically indicates potential issues related to dirt accumulation, moisture ingress, or manufacturing defects. Inspect the panel and frame, looking for any signs of physical damage or residue, as this may provide insight into the underlying issue. Principal causes include: 1) Dirt or dust buildup, leading to power loss; 2) Delamination of the solar panel layers, which can signal deeper. Solar panel discoloration is typically the result of long-term exposure to the elements, such as sunlight, rain, and dust. However, severe discoloration could. Solar panels are built to last 25 to 30 years, but solar panel damage, defects, and performance problems can appear long before a system reaches the end of its life. This film, often caused by dust, bird droppings, or mineral deposits, can significantly reduce the efficiency of your solar panels. If left unaddressed, it can lead to.