The principle of wind power generation is that it utilizes the force of the wind to drive the rotation of wind turbine blades. Then, through a gearbox, the rotational speed is increased to promote electricity generation by the generator. Solar cells are a type of device that can directly convert sunlight into electrical energy due to the photovoltaic effect. They are a semiconductor photodiode. When sunlight shines on the photodiode, it will convert the light energy of solar power into electrical energy.