ABOUT SOLAR GEYSERS

Solar geysers absorb light from the sun by means of solar panels to generate heat. A solar controller pumps hot water from the manifold on the roof into the geyser inside the roof when the temperature of the manifold is 7 degrees higher than the water temperature in the geyser, the solar controller will stop pumping when the temperature difference between the manifold and the geyser drops below 3 degrees and the process will then start again.

BENEFITS OF SOLAR GEYSERS

  • A solar geyser can save up to 90% of your water heating costs.

  • A solar geyser uses solar energy thus reducing your electricity bill

  • Less reliance on Eskom for hot water

  • Better for the environment

TYPES OF SOLAR GEYSERS

  • Thermosyphon system with tubes

  • Thermosyphon system with flat plate

  • Retrofit or Split solar geyser

  • Solar geyser with gas backup

TYPES OF WATER HEATING

 

THERMOSYPHON 

Thermosyphon is a method of passive heat exchange, based on natural convection which circulates a fluid without the necessity of a mechanical pump. This naturally happens when a Solar geyser is above the flat plate or tubes. 

HOW A THERMOSYPHON SYSTEM WITH TUBES WORKS

  • The system relies on the natural process of thermosyphon where heat rises from the tubes below into the geyser above, heating the water in the geyser.

BENEFITS 

  • Less maintenance as there is no mechanical pump

  • Tubes are about 20 - 25 % more effective that flat plates

DISADVANTAGES

  • Can overheat if hot water is not used over and extended period of time

HOW A THERMOSYPHON SYSTEM WITH FLAT PLATE WORKS

  • The system relies on the natural process of thermosyphon where heat rises from the flat plate below into the geyser above, heating the water in the geyser.

BENEFITS

  • Less maintenance as there is no mechanical parts

  • Flat plates are generally more hail resistant

DISADVANTAGES

  • Can overheat if hot water is not used over an extended period of time

  • Not as effective as tubes

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RETROFIT OR SPLIT SOLAR GEYSER SYSTEM

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HOW THE SYSTEM WORKS

A solar controller pumps hot water from the manifold on the roof into the geyser inside the roof. When the manifold temeprature rises to 7 degrees higher than the water temperature in the geyser. The solar controller stops pumping when the temperature difference between the manifold and geyser becomes less than 3 degrees and the heating process starts again.

BENEFITS OF SPLIT SOLAR GEYSER SYSTEMS

  • You can convert your existing electric geyser into a solar geyser, drastically decreasing installation costs.

  • Flat plates are generally more hail resistant

SOLAR GEYSER WITH GAS BACKUP

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All solar geysers should have some form of a back up heating system for rainy days.

BACK UP HEATING OPTIONS

  • An electric element utilizes electricity to heat your water when it is not hot enough.

  • A gas back up system will only heat the water you have used and pump it back into the geyser for your use.