Estimates vary but Windsave and others quote up to 30% of your electricity bill by reduced electricity consumption.

As well as a government grant of 30% towards the cost of purchasing the system, (contact The Energy Savings Trust (EST) via www.est.org.uk or call 0800 915 7722) a fossil fuel saving credit is available via ROCs Renewable Obligation Certificates). These are government-sponsored credits that do not involve taxation. Fossil fuel generators pay CCL (Climate Change Levy) that goes towards funding the introduction of renewable energy production e.g. wind farms. Currently an annual ROC credit of approx. 1MW of electricity per annum is worth around £60.

You’d need to check whether your local authority has independent grants and incentive schemes for renewable products.