... (TDH) will determine if you need a positive displacement pump or centrifugal pump. In general, positive displacement pumps (diaphragm, piston, ... instead of energy in a battery! For a livestock watering system or gravity fed domestic application, we recommend that ... system includesSolar panels, Battery, Mainframe box, Controller, Inverter, Pump, Pump protector, cable(18M), Wire rope Do not includeWater ...