DC Solar Water Pump System 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. Product Description                                  Product Parameter Solar Water Pump Projects Contact Information Email: info@bluesunpv.com Tel:+86 158 5821 3997 Address: 1499 Zhenxing Road, Shushan District,230031 Hefei,China