... pumps (diaphragm, piston, helical rotor, etc.) are best used where the TDH is high and the daily volume requirement is ... water source and the tank, the harder the pump has to work to get the water there. Static head is the simple measurement ... , can work continuously 12 hoursThe system includesSolar panels, Battery, Mainframe box, Controller, Inverter, Pump, Pump protector, cable(18M), Wire rope ...