The individual direction make the tubes very effective whole day.
The dry connected tubes are without working fluid in them. This make them very effective in very low values of sun intensity.
This is the main difference between them and the wet connected vacuum tubes or the flat collectors in cloudy whether.
The vacuum tubes with dry connection are made for easy changing of each separate tube and there is no need to interupt the work of the system.
The stand is made of Cr-Ni material protected against corrosion and wind resistance 30m/s. The heat exchanger is made of Ch-Ni steel, polyurethane insulation, aluminum sheet and stainless steel external jacket.
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