Energy FAQ's

What, why and how?

You may have some questions and concerns about using Solar Electricity and Solar Systems. Below are the most frequently asked questions, which we hopeyou will find useful. If there is a question on eco-sensitive heating and solar energy that you have but cannot see here, please give us a call on 0800 055 6419

Q: Can I use solar energy to make hot water or to heat my house/office?

A: Yes. It is much cheaper to use a Solar Water Heater (SWH) to utilise thermal solar energy for water heating (hot water or space heating). SWH use collectors that are connected to a (hot water) storage tank and produce hot water with a high efficiency. Solar electric systems consist of solar panels (sometimes called PV modules) which produce electricity, which can be used to make hot water, but at much higher cost.
 

Q: Does my solar system produce hot water on a cloudy day?

A: Yes, a solar panel does produce hot water even when it is not placed in bright sunlight. On a normal cloudy day there is always enough so-called diffuse light, by which the panel will produce hot water. However, the production is not as high as when the panels are placed in bright sunlight. So even on a cloudy day your panel will produce enough hot water. 
 

Q: How long will my system last?

A: If you buy a solar system now you will probably be able to use it for the next 20 to 30 years. Most manufacturers provide a warranty of 10 years for their solar panels. Other components than the solar panel have guaranteed lifetimes of 1 to 10 years.
 

Q: Where is solar heating used, how many systems are in place?

A: Solar heating is used all over the world. It is used in isolated and populated areas, in developing and developed countries. The last few years there has been an enormous growth in installed systems. So far over 60,000 hot water heating systems have been installed throughout the UK.
 

Q: What else do I need for solar heating?

A: Apart from the solar panels a solar system is made up of a temperature controller, twin coil cylinder, pump, valves, ancillaries and pipework. By integrating the solar system into building elements these costs can be reduced. When buying a solar system you also have to pay attention to all the components and not only to the solar panels. Ask Sun21 for solar heating advice.