The Wonder Ultimate-Pressurized series from Sudarshan Saur is an ETC system. It uses Copper Heat Pipe Technology with thermic fluid to heat water efficiently.
FLAT PLATE COLLECTOR (FPC)
The Flat Plate Collector (FPC) system from Sudarshan Saur uses a flat absorber panel consisting of copper fins. The panel absorbs sunrays to give you hot water in your home.