An automatic watering system by using solar energy, which comprises a power generation unit for generating power and storing it in a capacitor, and a voltage detection unit for detecting the voltage of the capacitor. When the voltage reaches the predetermined value, that is, the capacitor is fully charged, the user can open an electromagnetic valve and drive a pump to discharge water from a water storage container, so as to water the plants automatically. Thereby, such a simple structure can achieve the objective of watering automatically, and the power produced by the power generation unit can be used to water the plants totally, which can reduce the cost and improve the economical benefit.本發明提供一種太陽能自動澆水系統,其藉由太陽能發電單元發電並將電力儲存於電容中,而電壓偵測單元再偵測電容的電壓,當電壓達到預設值,也就是電容充飽電時,開啟電磁閥,並使泵作動將儲水容器內的水打出自動澆水,本發明結構簡單就能達到自動澆水的功效,且太陽能發電單元所產生的電力能完全使用於自動澆水的動作,能源使用率高,同時也能降低生產成本,更能提高經濟效益。20...太陽能發電單元21...太陽能板30...控制單元31...調整單元32...區間管控單元33...電容34...電磁閥35...電壓偵測單元40...泵50...儲水容器
