2021 latest Constant Flow Solar Fountain with Battery Backup Why Choose Us Water level monitoring system Upgraded big solar panel 4 different nozzles to choose If the pump can't work in sunlight, please follow the action: Clean and check the pump, remove the nozzle exclude the air inside. Place it under full sunlight, Reconnect the nozzle, press the panel full into the water then release. If still can't be used, we will help you to solve the problem.