The current maximum efficiency of the solar cell laboratory is 30%, and the maximum practical efficiency is 22%. Under standard sunlight conditions (1000 watts/square meter), the electrical power of a 1 square meter solar panel is 130-220 watts, and the average photoelectric conversion efficiency is 13%-22%. So, taking the highest 22% as an example, the electrical energy generated per hour is 220/1,000 = 0.22 kilowatt hours of electricity.
Power is not only related to materials, but also to air quality and sunlight angle. , etc. Naturally, the weaker the light, the lower the power and the less electrical energy generated per unit of time.