... (TDH) will determine if you need a positive displacement pump or centrifugal pump. In general, positive displacement pumps (diaphragm, piston, ... start and s. Some of the other functions of pump controllers are low water cut-off, lightning protection and load ... system includesSolar panels, Battery, Mainframe box, Controller, Inverter, Pump, Pump protector, cable(18M), Wire rope Do not includeWater ...