Solar Thermal Panels

Solar Thermal Panels

We offer the finest quality Europen Made Solar Thermal Panels in either Tube for or Flat Plate.

Vacuum Tube

The tubes have the benefit of a 10-year guarantee against loss of vacuum.  Collectors can be connected together and up to 12 collectors can be connected in series, using black ionised roof brackets providing a neat and attractive installation.

Flat Plate

Toughened 3.2mm thick glass for improved durability, and special anti-reflex coated glass for excellent solar transmission.  The collector consists of a laser welded copper / aluminium grid with a high selective absorber coating and 40mm rear insulation.

Available in 2 models that can be connected in series in horizontal or vertical orientation.

All our Solar Thermal Panels are E Solar Keymark approved – the quality label for solar thermal products in Europe.

Preinsulated 316 Stainless Steel Flexible Solar Hose

316 stainless steel flexible solar hose in 16mm, 20mm or 25mm diameter and is available in various lengths (please call for more details).  The Pipe is insulated with special closed cell insulation suitable for solar applications.  The temperature range is -50ºC to +150 ºC.  It is UV resistant and may be installed outside without any protective measures.

The hose comes complete with a 12 month warranty.

Sentinel R100 Heat Transfer Fluid for Solar Heating Systems

Features and Benefits

  • Ready to use concentration – no need for dilution
  • Effective frost protection down to minus 25°C
  • Resistant to degradation.
  • Provides effective corrosion protection for system metals.
  • Chemically & thermally stable components
  • Non-toxic and biodegradable
  • Buffered pH
  • Less frequent changing of the thermal fluid
  • Improved cost of operation of the solar system


Sentinel R100 Solar Thermal Fluid is a clear blue liquid based on propylene glycol solution.  It has been designed for use as a thermal fluid in solar heating equipment such as flat plate and vacuum tube collectors where it ensures highly efficient heat transfer between the solar collector and the thermal store. Sentinel R100 is also optimised to provide freeze protection of the circuit even to 25°C.

The special inhibitors contained in Sentinel R100 provide superior protection to the metals normally used in solar installations against corrosion and deposits. Sentinel R100 prevents the surfaces of heat exchangers fouling and maintains thermal efficiency. The product is especially formulated to resist thermal degradation and so extend fluid life.

The efficient thermal transfer properties and superior stability of Sentinel R100 help towards reduced cost of system operation.

Sentinel R200 – Solar Cleaning Solution

Ready-to-use cleaner for solar heating systems Sentinel R200

Features and Benefits

  • Ready to use – no need for dilution
  • Removes sludge and deposits from degraded thermal fluid
  • Cleans with only 20 minutes circulation
  • Effective at low or room temperature
  • Can be used with flushing machine
  • None foaming and easy disposal
  • Compatible with the construction materials of the solar system


Sentinel R200 is a specially formulated, mildly alkaline product designed for use as a cleaner for solar heating system circuits containing either flat plate or vacuum tube collectors.

The thermal fluids used in solar heating systems may degrade over time because of prolonged exposure to elevated temperatures.

This degradation process, which is indicated by a darkening of the fluid, not only reduces the lifetime of the thermal fluid, but also has the following adverse effects on the operation of the system:

  • Colour changes and viscosity increases
  • Thickening of the fluid and solid deposits which causes blockages
  • Reduces the diameter of the pipe work
  • Freezing point increases
  • pH decreases
  • The degraded fluid has a reduced heat transfer capability

In order to restore the efficient operation of the solar heating system it is necessary to drain the degraded thermal fluid, clean the system to remove any sludge, deposits or blockages, and refill the system with Sentinel R100 – a thermal fluid which is especially formulated to resist thermal degradation and so extend fluid life.

Filling Station

Go Geothermal have worked closely with leading heat pump manufacturers for many years and one of the many advantages of this is awareness of common issues. One such example is the importance of flushing units up to the task of expelling enough air and the correct equipment being instrumental in this.

So far in 2012 one of the most common errors seen by engineers is trapped air in collector systems.

Our solution not only complies with the MIS3005 document requirement it exceeds it. It also ensures correct mixing of heat transfer fluids another major issue with GSHP installs.

Want to fill 500m of 40mm Ground Collector Pipe with Glycol in less than 30 minutes, then give us a call.


Filling, flushing and venting large scale solar collectors, ground collectors, probes and Underfloor heating systems.


  • Dry self-priming impeller pump, working pressure max. 5 bar
  • 2 x 3 m supply and return hose 1″
  • Sturdy cart with pneumatic tyres
  • 120 litre tank
  • 90 L/min Flow Rate
  • 2 multifunction valves
  • Pressure relief valve
  • Comes complete with a standard UK 3 Pin 240V Plug