The Guardian web pages are reverberating to the clash of arms between George Monbiot and UK supporters of feed-in tariffs for solar photovoltaic panels and other small-scale renewables. Monbiot claims solar power is an extremely expensive way of generating electricity in the UK and that the new scheme is another way of subsidising the wealthy middle class. The fans of feed-in tariffs note the success of similar schemes in other countries. They think that the cashback proposals will help create jobs in businesses that install and maintain low carbon energy sources. The UK scheme will help drive down the costs of renewable technologies and increase public support for wind and alternative sources of electricity.
The argument has focused on solar photovoltaic panels installed on domestic roofs. This note tries to quantify some of the costs and benefits of the new scheme. I’ll take one of the simplest possible examples: an installation of 12 panels on the roof of a medium-sized house in the south west of England, where solar radiation levels are relatively high for the UK. Does solar energy make sense in this country?



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