Feature: 1. Wide working voltage, the voltage range of 24v water pump is 18v-45v, the best working voltage is about 36v 2. The screw pump is equipped with MPPT controller, can make full use of solar energy 3. 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 5. Permanent magnet DC brushless motor, stainless steel material with corrosion resistance, heat resistance, high and ultra-low temperature resistance Specification: Item Type: Screw 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 NS242T-20 Screw pump 24v(18-45v) 244w 2m³/h 20meter / 65.6ft 50mm / 2in 25mm / 1in 50 x 340mm / 2 x 13.4in 40cm / 15.7in 400w-500w（36V） NS242T-30 290w 30meter / 98.4ft 50 x 342mm / 2 x 13.5in 450w-580w（36V） NS242T-40 340w 40meter / 131.2ft 50 x 343mm / 2 x 13.5in 510w-700w（36V） . Package List: 1 x Water Pump1 x Controller1 x Waterproof Cement 1 x User Manual Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.