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Solar Rainfall board is a collection board that combines friction nanogenerators with solar panels. Some parts of South-East Asia and Africa suffer from frequent rains and inefficient solar panels, resulting in high local electricity costs and serious environmental pollution in power-generating areas. Solar Rainfall board use of friction nanogenerators can convert and store rains potential energy into electricity, while combining solar panels enables people in the region to use electricity at all times without polluting the environment.