solar controller - F-109

Main Features:
1.24-hour display.
2.Temp.display: Collector Temp. T1,Water tank Temp.T2
3.Temp.differences circulation.
4.Anti-frozen circulation.
5.Reheat at regular time.
6.Control constant temp.of electric heater.
7.Power off with memory.
8.Turn off display screen automatically to save energy.
9.Electric leakage alarm protection.