Solar THERMAL
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Solar thermal hot water systems use panels or tubes, called solar collectors, to gather solar energy. The solar collectors convert the infra-red portion of visible light into heat. The collectors are filled with a mix of water and glycol. This fluid is pumped round a circuit, which passes through the hot water cylinder transferring the heat to the stored water.
Sunlight is free, so your hot water costs will be reduced. The system works all year round, though you’ll need to heat the water further with a boiler or immersion heater, especially during the winter months. In the summer, it should provide around 90% of your hot water requirements, dropping to around 45% in the winter. Solar thermal systems are compatible with solar PV and battery systems meaning you can use electricity generated by these technologies to top up and store your hot water.
Once you install a solar hot water system, you won’t need to worry much about maintenance. It’s a good idea to replace the circulated antifreeze fluid and have your system inspected by a contractor every few years as safety precautions, but in general, active maintenance requirements are minimal. What’s more, a well-maintained solar hot water installation can last for more than 20 years, all the while producing free hot water with solar energy.
Solar energy is one of the cleanest and most sustainable ways to generate energy, producing zero greenhouse gases. Every unit of energy generated by the solar collector means one unit less of high carbon waste produced by fossil fuels.
