Solar Solutions

Evacuated Tube Technology

What is the difference?

These collectors consist of long dark coloured individual glass tubes. The individual glass tubes are each lined with a second glass tube on the inside of the tube and are fused together at the top. A cavity exists between the 2 glass tubes from which the air is withdrawn (evacuated) thus creating a vacuum.  This serves as excellent insulation against cold, windy and wet weather.  

The inner glass tube has a special selective dark coating that ensures great solar heat absorption with minimal heat loss.  Inside the inner glass tube runs a copper heat-pipe set in aluminum.  Inside the copper heat-pipe is an alcohol based liquid that starts boiling at a temperature as low 40 degrees Celsius.  

At the top of the solar collector is a copper manifold housed in highly insulated aluminum housing.  Each individual copper heat-pipe inside the evacuated glass tube slots into this copper manifold.  

The collectors works as follows:  during a normal solar day the sun’s rays heats up the copper heat pipe inside the evacuated glass tubes.  The heat is then transferred to the manifold.  The water from your geyser is circulated through the cavity inside the manifold via an intelligent pump system and the heat gets transferred from the manifold to the water.  Due to the advanced design of this solar collector it will even heat up on cloudy days because of solar radiation getting through the clouds.  

The collector has a lifespan of more than 30 years and is maintenance free, corrosion resistant and freeze resistant.  

Option 1:  Evacuated Tube conversion 

Option 2:  Evacuated Tube split system 

Option 3:  Evacuated Tube closed system