Solar Thermal Panels

We would advise installing flat plate solar thermal panels.  These are better value, have a better aesthetic, and suffer fewer maintenance issues than evacuated tubes.  If your roof is very small, evacuated tubes may be more suitable for you. 

How do solar thermal flat plate collectors work? 

  • Solar heating flat plate collector panels heat water.
  • The collectors contain a glycol liquid that circulates through  the panels and is heated by sunlight; this liquid then passes through a coil in the water tank which heats the water in the tank. Simple!
  • Solar thermal systems can cater for any size of building. 
  • Ideally they will need to be mounted on a south facing weight bearing surface, which receives direct sunlight for most of the day.

What are the benefits of solar flat plate collectors?

  • Reduces CO2 emissions on an average domestic system by up to 400kg per year
  • Straightforward installation and low maintenance
  • Easily integrated with existing or secondary heat source to boost hot water production in colder spells
  • Eligible for RHI funding
  • Saves money on gas bills
  • Lower dependence on energy companies
  • Installation options include surface-mounted pitched or flat roofs, A-frames, in-roof and complete roof installation, canopy or façade construction

How does the solar thermal system integrate with the other heat source?

The system is connected to a twin coil cylinder, often larger than a standard hot water cylinder. One coil receives heat from the solar collector on the roof, while the second receives heat from the other main heat source.

What other considerations are there?

  • Solar thermal panels heat water which must be stored for use when it is demanded.
  • A full range of hot water cylinders is available. We advise you on the correct size of cylinder for your project. Space should be allowed for these cylinders when planning your project.  
  • At least 2-4m2 of South-East to South-West facing roof space is need to consider a system.
  • It is possible that you will need to modify or replace your existing boiler to install a solar thermal system.
  • Water stored in unvented cylinders need to be installed by a qualified unvented installer (which we are!) to avoid potential dangers.