99600c1d_Collector___Solar_Water_Heater__Evacuated_Tube_Collector
[S.No] 14 [Flat Plate Collector] Hot water availability for 300 days in a year claimed. [Evacuated Tube Collector] 
Hot water availability for 350 days in a year.
Comparison between Evacuated Tube Collector & Flat Plate Collector - Solar Water Heater
Evacuated Tube Collector