solar hot water

How does it work?

For domestic solar hot water systems there are three main components

1. Solar panels or collectors - are fitted to your roof. They collect heat from the sun's radiation. There are 2 main types of collector:
- Flat plate systems - which are comprised of an absorber plate with a transparent cover to collect the sun's heat, or
- Evacuated tube systems - which are comprised of a row of glass tubes that each contain an absorber plate feeding into a mainfold which transports the heated fluid.
2. A heat transfer system - uses the collected heat to heat water;
3. Hot water cylinder - stores the hot water that is heated during the day and supplies it for use later.

The benefits of using a solar hot water heating system:

Solar water heating systems can provide you with about a third of your hot water needs. The average domestic hot water system reduces C02 by around 350kg per year and about £40 a year off your hot water bills! Depending on the fuel replaced.

Solar water heating systems can be used in the home or for larger applications, such as swimming pools. You will need 3-4 square metres of southeast to southwest facing roof receiving direct sunlight for the main part of the day for a domestic system. You'll also need space to locate an additional water cylinder if required.

Choosing a solar hot water system suitable for your home needs requires consideration of a range of factors, including the area of south facing roof, the existing water heating system (e.g. some combi boilers aren't suitable) and your budget. A competent accredited installer will be able to assess your situation and discuss with you the best configuration to meet your needs.