DC Voltage Solar Water Pump HEAD CALCULATE: DC 1.Distance of 'B+C+D/10' if have a water tank 2.Distance of 'B' if without water tank. FLOW CALCULATE: How much water per hour or per day do you want?Selecting the solar pump model that meets your requirements. Product Description                                ADVANTAGE FOR SOLAR WATER PUMP 1.With high efficiency permanent magnetic motor, efficiency improved 15%-30%. 2.Environmental protection, clean energy, can be powered by solar panel, battery as well as AC electric. 3.Over-load protection, under-load protection, lock-rotor protection, thermal protection. 4.With MPPT function. 5.Much longer life than the normal AC water pump. Product Parameters             Solar Water Pump Project Contact Information Email: info@bluesunpv.com Tel: +86 158 5821 3997 Address: 1499 Zhenxing Road, Shushan District,230031 Hefei,China