... : Daytime work no need battery. Nighttime work with battery.DC submersible solar powered irrigation water pump features:1) DC 24v,408w,no need ... ,70m,80m,90m,100m,150m for choice.3) Water shortage & voltage/current protection,controller inside.4) Flow: 600L / hour (2700L/hour).5 ... , diameter: 76mm.9) Net weight: 4.35kg.10) Can connect with the solar panel directly,daytime no need battery even cloudy.