,Expansion case 2,Intelligent controller 3,Circulation pump · Solar water heater work stationThe whole system including:1,Expansion case2,Intelligent controller3,Circulation pump4,Balancing valve5,Pressure guage6,Pressure valva Main technical data about solar controller: 1. Externality size: 450*200*150mm 2. Max. Self consumption: ≤3W 3. Accuracy of temprature measuring: +-2C 4. Range of ...