Feature:1. Wide working voltage, the voltage range of 12v water pump is 10v‑22v, the best working voltage is about 18v2. The screw pump come with built‑in MPPT controller, can make full use of solar energy3. Possess over‑voltage protection/under‑voltage 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 convenient5. Stainless steel material with corrosion resistance, heat resistance, high and ultra‑low temperature resistanceSpecification:Item Type: Submersible PumpMotor: Permanent magnet DC brushless motorMaterial: Stainless steelPerformance: AutomaticDrive Mode: Electric Model Type Working voltage Power Lift(approx.) Water inlet(approx.) Water outlet(approx.) Diameter x length(approx.) Cable(approx.) Recommended solar panel S122T-20 Submersible Pump 12v (10-22v) 110w 2m³/h 20meter / 65.6ft 76mm / 3in 25mm / 1in 76 x 510mm / 3 x 20.1in 1meter / 3.3ft 230w-300w（18V） S122T-30 140w 30meter / 98.4ft 76 x 512mm / 3 x 20.2in 240w-300w（18V） S122T-40 180w 40meter / 131.2ft 76 x 514mm / 3 x 20.2in 270w-360w（18V） S123T-20 240w 3m³/h 20meter / 65.6ft 76 x 516mm / 3 x 20.3in 360w-480w（18V） S123T-30 260w 30meter / 98.4ft 76 x 518mm / 3 x 20.4in 390w-520w（18V） 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.