Model Tank size # of Panels Light area Cost
Flat-Plate collectors comprise of an insulated, weatherproof box containing a dark absorber plate under one or more transparent or translucent covers. Water or heat conducting fluid passes through pipes located below the absorber plate. As the fluid flows through the pipes it is heated. This style of collector, although inferior in many ways to evacuated tube collectors, is still the most common type of collector in many countries.
These systems pump heat-transfer fluids (usually a glycol-water antifreeze mixture) through the solar water heater. Heat exchangers transfer the heat from the fluid to the water that is stored in tanks. Double-walled heat exchangers or twin coil solar tanks prevent contamination of household water. Closed-loop glycol systems are popular in areas subject to extended subzero temperatures because they offer good freeze protection. Glycol antifreeze systems are moderatly more expensive than warm weather climate systems to purchase and install. The glycol should be checked each year and changed every four years, depending on glycol quality and system temperatures.
Flat Plate Solar Collectors
Typical system configuration for domestic solar hot water system
Each system includes:
Collector,Tank, Circulator pump,Thermostat,Expansion tank,Sensors & Roof mounting hardware