Photo Voltaics

Photovoltaic cells (PVs) are a very different technology from solar water heating, and use light to generate electricity. They are particularly well suited to sites where a grid connection would be difficult or expensive or that are only used in the summer. For an independent power supply, solar works well with wind as there is a good balance of both over the year. Solar electricity, like electricity from other renewable energy sources, doesn't produce carbon dioxide or harm the environment.

Although start-up costs are higher than other renewable technologies, PVs have key advantages:

• There are no moving parts to fix so they are relatively easy to install and maintain.
• They can be sited in urban areas and are not restricted in the way that wind and hydro-power systems are.
• They can replace other roofing materials, for example tiles. The cells are embedded in a flat, waterproof material to form 'modules', which make ideal cladding material for walls and roofs.
• They need not take up any additional land space.
• It is hoped that efficiency gains will make PVs a very attractive proposition in the next two decades.

Funding & Grants
If you are considering installing renewable energy in your home, you may be eligible for a grant. UK wide - the DTI's low carbon buildings programme provides grants for householders, community organisations, schools, the public and not for profit sector and private businesses. Grants are available for photovoltaic cell systems, for more information see the low carbon buildings programme website.