A Solar thermal system works by harnessing the sun’s energy and converting it into heat, that is then transferred to your home or business. Solar thermal panels are used in conjunction with a boiler, collector or immersion heater. The solar collector utilises the sun’s rays to heat a transfer fluid which is a mixture of water and glycol, to prevent the water from freezing in the winter. The heated water from the collectors is pumped to a heat exchanger inside a water cylinder. The heat from the exchanger will then heat the water inside the cylinder. After the liquid releases its heat, the water flows back to the collectors for reheating. A controller will ensure the fluid circulates to the collector when there is sufficient heat available.