99600c1d_Collector___Solar_Water_Heater__Evacuated_Tube_Collector
[S.No] 2 [Flat Plate Collector] Collector efficiency on higher temperature is low. [Evacuated Tube Collector] 
Collector efficiency on higher temperature is high
Comparison between Evacuated Tube Collector & Flat Plate Collector - Solar Water Heater
Evacuated Tube Collector