Smart Technology Solar Panel Cleaning using Air water Gun & OFF Grid Electrifi cation 3rd place To allow dust and dirt to be removed from solar cells even in extremely dry regions, the team from Heriot-Watt University in Dubai developed a machine that eff ectively cleans the cells. The automated cleaning system sprays the solar cells with compressed air and water, which are combined in a fi xed ratio. The mixture is applied through a purpose-built nozzle. If dust sticks to a solar cell and mixes with salt or water over time, it becomes increasingly diffi cult to clean it off properly. Since dust can impair the effi ciency of solar cells by up to 50 per cent, an automated, powerful cleaning machine is an invaluable addition to solar farms in particular. The system is able to clean a large area of solar cells in a way that is cost-eff ective, time-effi cient, and not dependent on the weather. In a subsequent phase of the project, the team successfully realized a battery charging station designed to give people living in rural areas access to electricity. People will be able to charge their batteries at charging stations so they can then power LED lights, for example. Heriot-Watt University Dubai, UAE “Our system is mi- xing air and water in a designed pressure. Due to the air, the water usage is drastically reduced.” Prashant Kumar Soori 20 PHOENIX CONTACT