Feature:1. Possess wide working voltage, the voltage range of 24v water pump is 18v45v, the best working voltage is about 36v2. Submersible pump come with builtin MPPT controller, can make full use of solar energy3. Provide overvoltage protection/undervoltage protection, if the voltage is too high or too low, the pump will automatically stop working, and then check the voltage every 5 minutes. When the voltage returns to normal, it will automatically start to work4. The pump can be directly connected to the solar panel without the need to install batteries in the sun, very practical5. Stainless steel material have corrosion resistance, heat resistance, high and ultralow temperature resistanceSpecification:Item Type: Submersible PumpMotor: Permanent magnet DC brushless motorMaterial: Stainless steelPerformance: AutomaticDrive Mode: ElectricModelTypeWorking voltagePowerFlowLift(approx.)Water inlet(approx.)Water outlet(approx.)Diameter x length(approx.)Cable(approx.)Recommended solar panelS242T-20Submersible Pump24v(18-45v)190w2m/h20meter / 65.6ft76mm / 3in25mm / 1in76 x 499mm / 3 x 19.6in1meter / 3.3ft290w-380w36VS243T-20200w3m/h20meter / 65.6ft76 x 510mm / 3 x 20.1in300w-400w36VS242T-30220w2m/h30meter / 98.4ft76 x 512mm / 3 x 20.2in330w-450w36VS243T-30260w3m/h30meter / 98.4ft76 x 514mm / 3 x 20.2in390w-520w36VS242T-40284w2m/h40meter / 131.2ft76 x 516mm / 3 x 20.3in430w-570w36VS243T-40320w3m/h40meter / 131.2ft76 x 518mm / 3 x 20.4in480w-640w36V.Package List:1 x Water Pump1 x Waterproof Cement1 x User ManualNote:It is strictly forbidden to run the pump under dry conditions, and the damage caused by this situation is not within the scope of the warranty.