Maintenance costs for solar water heating systems are generally very low. Most solar water heating systems come with a 5-year or 10-year warranty and require little maintenance.
Once fitted, your installer should leave written details of any maintenance checks that you can carry out from time to time to ensure everything is working properly.
Perhaps the most important thing for you to check for is whether there are any leaks. Leaks of the water-glycol mix will produce a strong smell (even if you can’t see any liquid). If you notice this, you should contact your installer.
If you are not getting hot water or the solar pipework is cold when the pump is running on warm, sunny days, you should contact your installer.
For peace of mind, some installation companies offer an annual service check.
You should have your system checked more thoroughly by an accredited installer every 3-7 years, or as specified by your installer.
It is likely that after this period, the glycol that protects your system in the winter months will need to be topped up or replaced, as it breaks down over time, reducing the performance of your system.
If you’re leaving for a summer break, you could consider leaving your solar water heating system running. Glycol degrades at excessively high temperatures and leaving the system running helps to reduce temperatures.