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Sun Spot Solar offers custom-built solar storage tanks:
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STSS Co.
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Caleffi
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Oventrop
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A lower cost alternative to steel tanks, these non-pressurized EPDM lined tanks are available in many sizes and heat exchanger configurations.
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The solar water heater has either one or two internal coils and a backup electric heating element in the single coil units. A heating medium is passed through the solar panels and internal coil as long as there is an adequate temperature difference between the heating medium and stored water in the tank. The internal coil is located as close to the bottom to facilitate the transfer of heat even at lower solar panel temperatures.
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Indirect dual-coil domestic hot water storage tanks are made in 60, 80 and 115 gallon units. One heat exchanger coil can be connected to solar collectors, and the other heat exchanger coil can be connected to a hot water boiler. The units are provided with top and bottom heating coils and two 3/8 ID thermal wells to control each coil independently.
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Generally one copper heat exchanger coil is connected to the solar loop and a second coil to the domestic water supply.
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Additional coils can be added to support house heating for example.
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During periods of water flow through the water heater, hot water is drawn from the top of the heater and cold water comes into the bottom of the tank (by a dip tube or bottom inlet). On single coil tanks, if the hot water demand should exceed the solar heat input or there is an insufficient temperature difference between the heating medium and stored water, the heating element thermostat will activate the electrical heating element for backup heat.
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Quality Design and Construction:
- Tanks and coils are all stainless steel
- Large smooth coils, no finned tubing.
- Includes over 2 of urethane insulation, R-12.
- Thermoplastic jacket will not rust or corrode.
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Tanks are collapsible, making them easy to transport and move through narrow doorways.
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On double coil tanks, the upper tank is connected to the boiler for backup heat. Solar heat output from the internal coil will vary depending on outside conditions and the temperature of the stored water.
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Easy Installation
- All connections are on top
- Brass drain and relief valves are factory installed
- Two thermostat wells to control each coil independently
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Click here to view a technical pdf.
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Click here to view a technical pdf.
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Tanks can be ordered as drain back versions.
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Sales - click on 
General Information - click on 
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Sales - click on
General Information - click on
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Sales - click on
General Information - click on
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back
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