Purple

There are purple spots on the surface of photovoltaic panels

Solar panel discoloration is one of the most visible signs of potential damage. This typically appears as brown, yellow, or purple stains on the panel surface. This issue occurs due to the degradation of ethyl vinyl acetate (EVA), a material used as an encapsulant in the panel. Over time, solar cells can crack or become discolored, especially due to UV exposure or heat stress, both leading causes of solar panel defects and power loss. Frame: The rigid. . The most common solar panel defects are cell cracks, microcracks, delamination, hotspots, bypass diode failure, and wiring problems.