Tasol solar offers both evacuated tube as well as flat panel solar water heating solutions.
Flat panel solar water heating is an older technology solution. These flat panel systems are less effective than evacuated tube systems, since flat panel solar water heating need direct sunlight and heat.
Flat panel solar water heating systems are not frost resistant, and glycoll is used in the flat panel collector. The glycoll gives the flat panel a temporary frost-resistance. The flat panel needs to be serviced every 2 years. The glycol inside the flat panel should be replaced during this service. This means that these flat panel solar water heating systems require maintenance.
Flat panel solar water heating systems are installed as indirect systems. This means that the glycoll is heated in the flat panel and then circulated from the flat panel into an element inside the geyser where heat transfer takes place, the glycol is continuasely circulated between the flat panel and the geyser.
The flat panel system forms one single glass panel, meaning that damage to a part of the flat panel might result in the need to replace the whole flat panel.
A flat panel solar water heating system generally consists of a flat panel collector and indirect solar geyser.