... (TDH) will determine if you need a positive displacement pump or centrifugal pump. In general, positive displacement pumps (diaphragm, piston, helical ... the solar array is not producing enough power, the pump/motor may be turning but not fast enough to do this ... system includesSolar panels, Battery, Mainframe box, Controller, Inverter, Pump, Pump protector, cable(18M), Wire rope Do not includeWater ...