Cleaning system for solar panel

A cleaning system for a solar panel, the solar panel comprising a battery plate and a glass plate mounted above the battery plate, the cleaning system comprising:

• a plurality of light emitting elements mounted at different areas on the battery plate;
• a plurality of photosensitive elements mounted at different areas of the glass plate, the photosensitive elements having a same number with the light emitting elements and respectively corresponding to the light emitting elements, wherein each photosensitive element receives light from a corresponding light emitting element through the glass plate and obtains a light intensity of the light;
• a control circuit connected to the photosensitive elements, and receiving the light intensity of the light from the light emitting elements and comparing the light intensity received from the photosensitive elements with a preset light intensity, wherein the preset light intensity is equal to a light intensity of the light directly received by the photosensitive element without the glass plate;
• a fluid tank;
• a plurality of nozzles;
• and
• a switch connected between the fluid tank and the nozzles, wherein the control circuit controls the switch to connect the fluid to the nozzles in response to the light intensity received by the corresponding photosensitive elements being less than the preset light intensity, and controls the switch to disconnect the fluid tank from the corresponding nozzles in response to the light intensity received by the corresponding photosensitive elements being substantially equal to the preset light intensity.