Flat plate solar collector is a special heat exchanger that transform the radiant solar energy from the sun into heat energy. It uses the blue titanium selective absorber sheet makes absorbing volume up to 95% of available sunlight converting into usable heat for hot water production. Comparing to the vacuum tube or any other solar water heating systems, it tends to be most effective collector for residential or commercial hot water heating projects due to their simple design, low cost, and relatively easier installation.