Support for your Solar Thermal System

We recommend that the glycol concentration in your solar thermal system is checked during the annual service of the system. In general, it is recommended that the glycol fluid is replaced every five years to ensure optimum performance. The glycol fluid in your solar thermal system should only be tested and replaced by a heating engineer.

No. Grant Solar Thermal systems require only basic maintenance in order to ensure that they continue to give trouble free operation.

A solar thermal system is a low maintenance system but it is still recommended that it should be serviced annually. Find a local solar thermal service engineer in your area.

Many people believe that solar collectors only work in the summer, however this type of free energy is available throughout the year. From May to September, solar thermal could produce 100% of the energy required for heating your domestic water. Grant collectors operate not just with direct sunlight, but also diffused sunlight, so they even work on cloudy days.

To improve your solar thermal hot water system, you can adhere to the manufacturer guidance regarding regular visual checks of your system to ensure the panels are clear from debris, get your system serviced annually, and discuss with your heating engineer other potential upgrades and energy-efficiency improvements you can make to your property such as upgraded insulation, improved controls or a more efficient hot water cylinder.

The solar fluid is a non-toxic 40/60 propylene glycol and water solution which has been specifically developed for solar thermal applications to protect the systems from freezing. The nitrate, phosphate and ammonia free fluid has been formulated to remain stable over long periods of time, will not freeze when temperatures drop below freezing, and it is also a good corrosion inhibitor.