It’s the first question we’re asked. Can solar power work in a Scottish climate?
The simple answer is yes.  Because these solar panels are powered by solar radiation – and not direct sun light – they can produce hot water even on a cloudy day.
Throughout the spring, summer and autumn, a solar panel can yield surprising results. Depending on your system, solar panels can provide approximately 60% of your hot water needs annually.

Solar water heating system is a clean and highly efficient means of using renewable energy from the sun to provide hot water. Usually, but not exclusively, roof mounted solar panels will be connected to one of the coils of a twin-coil cylinder using a sealed circuit containing a special glycol/water solution.
This fluid not only withstands the high temperatures in excess of 200°C on a summer’s day but also will not freeze down to -25°C. The pump in the system circulates the heated fluid from the solar panel to the cylinder, where the heat is transferred to the stored water.