Data from RGB inspections generally show physical damage to solar panels. This can include things like broken glass, chipped edges, bird droppings and scratches. Such defects reduce the amount of light the solar panel can capture, which in turn reduces the amount of power it can generate. Additionally, reviewing inverter metrics can highlight performance declines that further signal inefficiencies, allowing for timely. . While traditional visual and infrared (IR) inspections are still a common practice, a more advanced diagnostic method is emerging as an invaluable tool for solar operators: electroluminescence (EL) testing. Unlike surface-level assessments, EL imaging allows engineers to see inside the photovoltaic. . A photovoltaic (PV) module, commonly known as a solar panel, is composed of multiple layers.