Solar panels are devices that convert sunlight to electricity. There are several synonyms that are used to refer to solar panels, including photovoltaics, solar arrays, solar modules, solar cells, and solar collectors. Photovoltaic cells are the most commonly used synonym because they are the technological foundation of solar panels. Solar arrays is another common synonym and refers to a group of solar panels that work together to generate electricity. Solar modules are solar panels that have been designed to work in a specific way and are assembled into a larger system. Solar collectors, on the other hand, are used to collect and concentrate sunlight, usually to heat water. Overall, all these synonyms refer to different types of solar panels that are used to generate renewable energy.