How It Works
How do solar thermal systems work?
The solar thermal collectors (plates or tubes), absorb the sun’s energy rays and converts them into heat, which then transfers this heat to a heat transfer fluid. (This heat transfer fluid is typically a glycol and water mix where regions are liable to frosts).
The heat transfer fluid then gets pumped through a heat exchanger located inside the water storage tank where it transfers its heat to the water in the tank. After heating the water the fluid then returns to the roof to absorb more of the suns energy, before travelling back to the water storage tank to transfer the heat again. When the sun is not shinning so much, (as it tends to in the UK), you would then use your convention boiler to help top-up or heat your hot water.