npower solar thermal panels generate hot water from the Sun’s energy

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Solar thermal panels acts as an upgrade to your existing heating system, producing hot water by harnessing renewable energy from the sun. The system's "collectors" absorb solar energy and transfer that into thermal energy to be used in a hot water cylinder or thermal store.

How does Solar Thermal work?

  1. Cold water enters the system from mains supply
  2. If the collector is warm enough the pump will be activated by the Solar Controller
  3. Solar fluid is then pumped round the collector, heated by solar energy
  4. This fluid then passes in to a cylinder heating up the water via a coil
  5. If required a second coil brings up the water to the pre-set temperature via an existing boiler
  6. Hot water is now available through the taps

Solar Thermal - Domestic System

A solar thermal system is made of:

Solar Collectors

Flat Plate

Flat Plate
Flat-plate collectors consist of dark-coloured absorber plate. The plates are enclosed within a glazed, insulated box that behaves like a mini-greenhouse to retain heat within the collector.

  • More versatile. Can be mounted horizontal, vertical, on the roof and in roof
  • Cheaper to manufacture
  • More robust design and less likely to overheat
Evacuator Tubes

Evacuator Tubes
Evacuator tubes consist of rows of parallel tubes, each containing a glass thermal absorber. During production, air is evacuated from the tubes allowing it to reach higher temperature at all light levels.

  • More efficient at generating and retaining heat
  • Easy to repair. Failed tubes can just be replaced without any major disruption

Solar Cylinder, Pump & Controller

Solar Cylinder

Solar Cylinder
The hot water cylinder installed will have a ‘twin coil’ heating system. The lower coil is heated trough the solar panels while the upper coil is heated through your existing boiler.

Pump & Controller

Pump & Controller
The system is managed through a solar controller which manages the pump speed. Temperature sensors in the cylinder and the collector are read by the controller which regulates the rate that solar fluid is pumped through the system.


Why choose a Solar Thermal system

What are the benefits of installing a Solar Thermal system?


Is Solar Thermal right for your home?

Find out if your property is suitable for Solar Thermal.


How do I get Solar Thermal installed?

Interested? Here’s how you get started.

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