Sunset reflection on solar panel. Artwork of a solar panel with a reflection of the setting Sun. Solar panels are arrays of photovoltaic cells that convert the energy in sunlight into electricity. They are an economical and efficient power source that does not pollute or contribute to global warming. Sunsets are orange because the sunlight travels through more of the atmosphere and other colours (such as blue), which are scattered more than red colours, do not reach the eye.
