Solar water heating systems (solar thermal) use heat from the sun to work alongside your conventional water heater. The technology is simple and relatively cheap, making solar hot water generally the most cost-effective renewable measure to fit to your home. They are very efficient and work well even in Staffordshire. Solar panels are fitted to your roof, facing south west to south east. These collect heat from the sun's radiation. A heat transfer system uses the collected heat to heat water, which is then stored in a hot water cylinder.
What are the costs and savings?
Solar thermal can provide almost all of your hot water during the summer months and at least a third of your total hot water needs. The average system reduces C02 by around 350kg per year and about £40 a year of your hot water bills, depending on the fuel replaced.
The typical installation cost for a domestic system is £3,200 - £4,500. The Energy Saving Trust gives more details on costs and savings.
Important points
- Solar water heaters work best if your existing central heating system already includes hot water stored in a cylinder (as opposed to instantaneous hot water provided by a combi boiler)
- Preferably you will need between 2 and 5 square metres of south-east to south-west facing roof space that receives minimal shading during the day (about 1 square metre per person).
- You may also need space for an additional water cylinder, although some systems use the existing cylinder.
- There are a range of systems and technologies. Consult two or three companies for advice on your particular circumstances and a quotation.
- Look for installers who are members of the Solar Trade Association.
- Beware of some national companies who use hard-sell techniques and make exaggerated claims. Their products may be good, but their prices may be high and customer services low.
- It is possible to fit a solar water heating system yourself. Training courses are available in Bromyard.
- Solar water heating systems generally come with a 5-10 year warranty and tend to require little maintenance