Your Questions About Pv Panels

Mary asks…wind turbines - what is practical and effective ?Is it only small wind turbines that can practically be purchased in the UK and can be mounted on roofs? I would like to investigate the possibility of a very large company, with many buildings and very high energy bills, harnessing wind power. There is not enough land space for a free standing large turbine but plenty of roof space (I will also look into PV panels but would like to understand wind further first). It is quite an

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