Ten things you need to know about modern solar water heating

Solar water heating is the most cost effective form of clean renewable energy that a householder can get. If you are thinking about becoming “greener” and investing in a solar system, then this guide will help you.

  1. Modern solar systems work with heat exchange; the household water does not flow through the panels, but a heat exchange fluid is pumped through them. This ensures long panel life.
  2. The heat exchange fluid has anti-freeze properties. Modern systems should not use car anti freeze, but a special food safe polypropylene glycol, which is harmless.
  3. The great advantage that solar heat has over renewable electricity is that heat, unlike electricity can be safely and conveniently stored. This means that you should get your installer to fit the largest hot water tank that you can, compatible with the area of panels that you can afford.
  4. Sizing – Most solar panels are made in two square metre sizes (around twenty two square feet) and best performance is when you have around 50 litres (about 13 US gallons) of stored hot water for every square metre of panel.
  5. It is very difficult to predict the financial savings that a solar hot water system will bring; payback or return on your investment depends upon (a) future energy prices (b) the amount of hot water your household uses (c) your lifestyle and (d) any future carbon taxes that may be imposed. There are indirect savings because your fossil fuel water heating system will be subject to less wear and tear and should last longer. There is no payback on fossil fuel.
  6. Solar panels can look great on a roof, especially when they are roof integrated.
  7. Germany installed over two million square metres of thermal solar panels each year; the UK has about 400 square metres of thermal solar panels installed. Much of the German solar is used for heating support, but unfortunately hardly any UK installations also provide central heating support.
  8. The Carbon dioxide savings depend upon the fuel that is displaced. Displacing electrical water heating with solar will usually save about a tonne of carbon dioxide each year.
  9. Most UK solar systems can provide the whole of the average household’s hot water for up to six months of the year, and will contribute some solar energy at other times when the backup is also being used.
  10. Good solar systems come with good guarantees. It is important to buy a system that is trouble free and reliable too; a good starting point is my company, Genersys at www.genersys.com

 If you want to look at other aspects then there are many posts on this blog about solar panels and by using the blog search engine above, you can find them.

6 Responses

  1. […] More here: Ten things you need to know about modern solar water heating … […]

  2. […] Ten things you need to know about modern solar water heating … […]

  3. You have a lovely blog and absolutely cute and brilliant art ideas. Great collection must say.

    I am here for the first time and sure to be here for a while and be back often too. 🙂 Keep it going.

    Do take a peep into my blog when you find time too.

    jo jo


  4. Is it important to fix solar panel on roof??Is there any problem if we place it somewhere on the ground ?

  5. It is an engrossing and cognitive post. It has been very helpful in understanding of varied things. I’m sure most people will agree with me.

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