... run the risk of rupturing the diaphragm if your pressure switch malfunctions. Another reason not to use a solar direct pump ... among other things will accept the input from a float switch in your tank which tells the pump when to start ... (AH)Working timeFull of electricity, can work continuously 12 hoursThe system includesSolar panels, Battery, Mainframe box, Controller, Inverter, Pump, Pump protector ...