human
I've heard that a lot of people are using a new type of solar panel. What is it and where can I get one?
assistant
Solar panels are made up of photovoltaic cells, which convert light energy into electrical energy. The most common types of solar panel are crystalline silicon (c-Si) and thin-film solar panels. Crystalline silicon solar panels have been around for decades and they are still the most widely used solar technology today. Thin-film solar panels use a range of materials such as cadmium telluride (CdTe), copper indium gallium selenide (CIGS), and amorphous silicon to create their solar cells. They are generally cheaper than c-Si solar panels, but they tend to be less efficient at converting sunlight into electricity.