Feature: 1. Possess wide working voltage, the voltage range of 24v water pump is 18v‑45v, the best working voltage is about 36v 2. Submersible pump come with built‑in MPPT controller, can make full use of solar energy 3. Provide 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 work 4. The pump can be directly connected to the solar panel without the need to install batteries in the sun, very practical 5. Stainless steel material have corrosion resistance, heat resistance, high and ultra‑low temperature resistance Specification: Item Type: Submersible Pump Motor: Permanent magnet DC brushless motor Material: Stainless steel Performance: Automatic Drive Mode: Electric Model Type Working voltage Power Flow Lift(approx.) Water inlet(approx.) Water outlet(approx.) Diameter x length(approx.) Cable(approx.) Recommended solar panel S242T-20 Submersible Pump 24v(18-45v) 190w 2m³/h 20meter / 65.6ft 76mm / 3in 25mm / 1in 76 x 499mm / 3 x 19.6in 1meter / 3.3ft 290w-380w（36V） S243T-20 200w 3m³/h 20meter / 65.6ft 76 x 510mm / 3 x 20.1in 300w-400w（36V） S242T-30 220w 2m³/h 30meter / 98.4ft 76 x 512mm / 3 x 20.2in 330w-450w（36V） S243T-30 260w 3m³/h 30meter / 98.4ft 76 x 514mm / 3 x 20.2in 390w-520w（36V） S242T-40 284w 2m³/h 40meter / 131.2ft 76 x 516mm / 3 x 20.3in 430w-570w（36V） S243T-40 320w 3m³/h 40meter / 131.2ft 76 x 518mm / 3 x 20.4in 480w-640w（36V） . Package List: 1 x Water Pump1 x Waterproof Cement1 x User Manual Note: 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.