Solar Hot Water

The benefits of going solar…

  • Harness the power of the sun to save money and our environment
  • Reduce your hot water power bill by up to 90%
  • Huge government rebates in most areas
  • Reduce your Carbon Footprint by up to 3 tonnes per year
  • The equivalent of planting 200 trees or taking a
    small car off the road each year

Key components…
Glass evacuated tubes are the key component of the Edson Evacuated Tube Heat Pipe solar collectors. Each evacuated tube consists of two glass tubes. The outer tube is made of extremely strong transparent borosilicate glass, that is able to resist impact from hail up to 25mm in diameter. The inner tube is also made of borosilicate glass, but coated with a special selective coating which features excellent solar heat absorption and minimal heat reflection properties. The air is withdrawn (evacuated) from the space between the two glass tubes to form a vacuum, which eliminates conductive and convective heat loss.

Edson Solar Hot Water


How does solar work?

The Edson Solar Hot Water System uses solar collectors designed to collect heat by absorbing sunlight. The collectors are devices for converting the energy in solar radiation, providing a highly efficient means of heating your water.

Solar will significantly reduce your carbon footprint.

Edson are proud to be making a difference and hope that through education and working with the community we can make a significant contribution to the reduction of green house gas emissions in Australia.

Why should you go solar?

  • It’s from the sun and it’s free
  • Reduce your hot water power bill by up to 90%
  • Up to 50% of the system cost can be recovered in rebates and STCs in some areas
  • Reduce your Carbon Footprint by up to 3 tonnes per year
  • The equivalent of planting 200 trees or taking a small car off the road each year

Displayed is a typical Edson Solar Electric Boosted Water Heating System >

Edson Solar Hot Water System


Heat Transfer

Inside the glass evacuated tube described above a copper heat pipe is installed. The copper heat pipe transmits heat to its tip which is plugged into the collector’s heat transfer manifold.

As water runs through the manifold heat is transferred from the copper heat pipe to the water as shown in the diagram (below). The heat transfer manifold is housed in a highly insulated aluminum housing.

This method of heat transfer is a thousand times more efficient than a solid copper rod. Heat is therefore very efficiently transferred from the glass evacuated tube to the water. Since no water is flowing through the collector tubes and the tubes are hermetically sealed it does not suffer from corrosion problems, as is the case with other types of solar collectors.

Unlike other types of solar collectors, evacuated solar collectors still provide excellent results on cloudy days. This is because the tubes are able to absorb the energy from infrared rays which can pass through clouds. Wind and low temperatures also have a minimal effect on the function of evacuated tubes when compared to flat plate solar collectors. This is due to the insulating properties of the vacuum in each tube.

Edson Heat Transfer

Comparison : Evacuated Tubes V’s Flat Panels

(Sydney – Winter & Summer)



Edson Solar Hot Water Systems

Evacuated tube, Manifold, Stainless Steel Mounting Frame 15 Years

Stainless Steel Tank 20 Years, Vitreous enamel (Glass) lined tank 7 Years from date of installation.

The longest warranty on any Solar Hot Water system in Australia. Independent reports have also shown that a Edson Solar Hot Water System lasts much longer than others on the market with a 30 years probable life.


  News Flash: Edson Solar now have a 20 year warranty on their Stainless Steel Tanks, yes 20 years warranty!