The light intensity is proportional to the photocurrent of photovoltaic cells and components. Within the range of light intensity from 100 to 1000 watts per square meter, the photocurrent grows linearly with the increase of light intensity from beginning to end. However, the light intensity does little harm to the working voltage. Under the standard of fixed temperature, when the light intensity changes within the range of 400-1000 wow per square meter, the open-circuit voltage basis of photovoltaic cells and components will not be changed. Therefore, the output power of the photovoltaic cell is also directly proportional to the light intensity.