Annually the UK receives solar radiation equivalent to the typical output of 1,000 power stations, solar energy can be used directly to provide domestic hot water. The average annual domestic hot water demand requires around 3,000 to 4,000 KWh per household; with a total annual household energy demand of 26,000 KWh on average. Each year over 1000 KWh of energy is received for each square meter of the British Isles, 60% of the solar radiation found at the equator.

A Solar Hot Water system is one of the most cost effective and environmentally friendly renewable energy resources available, they are simple and widely used. Although systems have been around since the 1970’s, it is only recently that technological advances have provided a greater selection of equipment which can be tailored to suit each application. Solar hot water systems (sometimes called Solar Thermal systems) convert light into heat, which in turn creates hot water for your home. Solar energy is absorbed by solar collectors, usually mounted on the roof of a building. When exposed to sunlight the solar collectors heat up to temperatures significantly above the ambient air temperature, and once they are several degrees Celsius warmer than the water in the hot water cylinder, heat will be transferred to the cylinder. Solar heating does not need hot temperatures or bright sunlight to work, simple daylight is sufficient thus it is suitable for any climate.

Solar hot water systems are financially beneficial as they provide between 50 and 70% of annual water heating virtually free, in the summer months a system can cover almost all hot water needs and takes care of at least half for the colder times of year. The system is not only cost efficient but dramatically reduces a homes impact on the environment, it is estimated that on average a typical domestic system can reduce carbon emissions by around 400 kgs each year. The period taken to payback the cost of buying and installing a system depends on factors such as the type of fuel displaced and the amount of hot water used, grants are available to help some with the cost of the solar hot water system.

The installation of a system is relatively simple, generally taking one or two days to complete, it requires very little upkeep; every three years the integrity of the glycol within the system can be checked and tested. Solar works on all roofs types – pitched, flat or curved - however is most effective when facing south, south east or south west. The larger the surface area available the more potential energy can be created.

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