Solar Flat Plate Collectors

Posted by admin | | Sunday 15 February 2009 8:41 pm

Flat Plate Solar Collectors –

Flat Plate Solar Collector

Flat plate collectors are an excellent solution for your hot water heating requirements in the warmer climates. Utilize the power of the sun to heat your domestic hot water. Our collectors are also suitable for commercial applications including residential buildings, car washes, and boiler systems.

Our collectors can be integrated with your existing hot water system to accommodate up to 90% of your hot water requirements. In addition to domestic hot water systems, our collectors may also be used in radiant floors and base board heating systems.

Flat Plate Solar Collectors are extremely affordable, costing only a few hundred dollars each.  They are also ideal for cool to warmer climates, where extended periods of freezing temperatures below 2oF are not a major concern.

In these locations, Flat Plate Solar Collectors are ideal, and the most cost-effective solar collector choice that you can make. However, one minor disadvantage of a Flat Plate Solar Collector is that, maximum performance is only reached when the sun is in front of the collector, whereas the tubular design of  Evacuated Tube Solar Collectors make them ideal for collecting sunlight at all hours of the day, 360 degrees with solar heat reflecting from the roof, or behind the panels, wherever the sun.

It all depends on your location:

In the sunny middle of the country, one Sq Ft of our Solar Evacuated Tube Panels will produce an average 290,000 Btu’s per year at an initial panel cost of $38 per Sq Ft. On a bright winter day they will produce an average of 1,400 Btu’s per Sq Ft per day.

In the sunny middle of the country, one Sq Ft of our Solar Flat Panels will produce an average of 294,000 Btu’s per year at an initial panel cost of $32 per Sq Ft.  On a bright Fall or Spring day they will produce  1,418  Btu’s per Sq Ft per day. If you are in an area where near or below freezing temps are normal for the heating months, then  Solar Flat Panels will not produce enough energy to match the Evacuated tubes. Solar Evacuated Tubes would be the proper and efficient Solar Panels for that climate.Flat Panels are more efficient in warmer climates than Evacuated Tube Panels. Flat Panels are affected by outside air temp and cold wind, and Evacuated Panels are not.  When you need less than 130-degree water, FP’s are the best in non-freezing areas.

Evacuated Tube Panels are more efficient in warm to sub-freezing climates, as they are not affected by outside air temperature or cold wind, and absorb available sunlight from 360 degrees. They are designed for DHW needs and/or house heating, and commercial structural heating needs with water temps between 120 – 190 degrees F.


Flat Plate collectors are specially designed to maximize the absorption and retention of solar radiation. As Light passes through the low-iron glass covering and strikes the black chrome selective coating, the light is absorbed as heat. The special black chrome selective coating allows the collector to absorb a wider range of wavelengths, and the low-iron glass covering allows the maximum amount of light to enter the collector because it has the highest transmission and therefore lowest reflection properties for glass.

As the absorber plate heats up it begins to radiate energy as infrared (IR) or heat radiation. Glass is essentially opaque to IR wavelengths so the heat is trapped increasing the temperature within the collector. Therefore, these collectors create a greenhouse effect which maximizes the amount of solar radiation entering the collector, and minimizes the amount of solar radiation that is able to exit.

80″ x 39″ x 3.75″
81 Lbs
Setup Angle
20 – 90 Degrees
BTU Peak Output
1.61 Gallons
Nominal Flow Rate
13 – 80 Gallons/Hour
Gross Area
21.93 Ft (2.03 m2)
Absorber Area
18.68 Sq Ft (1.73 m2)
Cover Material
Patterned Tough Low Iron Glass
Casing Material
Aluminum (sea water resistant)
Absorber Material
Red Copper
Isulation Material
40mm Mineral Wood
Maximum Operating Temperature
391 oF (200 oC)
Maximum Operating Pressure
160 PSI