The most common collector for solar hot water is the
The most common collector for solar hot water is the flat plate collector. It is a rectangular box with a transparent cover, installed on a building’s roof. Small tubes run through the box and carry fluid-either water or other fluid, such as an antifreeze solution. The tubes attach to a black absorber plate. As heat builds up in the collector, it heats the fluid passing through the tubes. The hot water or liquid goes to a storage tank. If the fluid is not hot water, water is heated by passing it through a tube inside the storage tank full of hot fluid