Solar energy is the most abundant and constant source available, across the surface of the Earth. A Solar panel or PV module is an essential component that is being used for the conversion of sunlight directly into direct current (DC) electricity. A major drawback of solar panel system is its extremely low efficiency of conversion of light energy to electrical energy and its further drop when there is laxity of care and maintenance of the panels. This project is focused on designing and developing a sensor-based street light solar panel cleaning mechanism which can be added as a retrofit and requires minimal human interference to operate. The water-based system with a pair of wiper blades is mounted on a pair of lead screws which are rotated by a pair of servo motors which are powered by current drawn directly from the panel. The water is supplied by a tank fixed on the underside of the panel and a catchment dugout at the bottom end of the panel allows the run-off water to get collected after the cleaning operation. The system operates based on the information collected from a timer, voltage sensor, current sensor, and humidity sensor. The operational frequency of the system is based on the information provided by the sensor and varies based on the accumulation rate of particulate matter on the panel and the reduction in transmittance because of the same.
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