Britain's first commercial wind farm is gearing up to start the process of repowering next month.

Built in 1991, the Delabole Wind Farm is replacing the ten original turbines with four larger and more powerful ones which will more than double the current output.

The new turbines are almost twice the height of the old ones.

They will measure 64 metres to the hub and 99.5 metres to the tip compared to the 32-metre hub height and 50-metre tip height of the old turbines.

The new turbines harness the wind far more efficiently.

The project is costing Good Energy £12m and the turbines represent the second generation of onshore wind power in the UK.

Increasing the capacity at the Delabole wind farm will help contribute to Cornwall's renewable energy targets.

The county aims to achieve a 20 per cent reduction in its greenhouse gasses by 2015, a 40 per cent reduction by 2020 and be energy self-sufficient by 2025.

Good Energy believes that homegrown energy produced from a network of independent renewable generators across the country is better for future energy security as well as cutting carbon emissions.

Chief executive, and founder of Good Energy, Juliet Davenport, said: "We want to make it as easy as possible for homes, businesses and communities to generate their own clean energy.

"It helps reduce overall carbon emissions and helps insulate us all from fuel price fluctuations as well as being able to provide an income if you produce enough power to export."

The old turbines are scheduled to be removed in the early part of August and the new turbines will arrive on site on September 13.

The first of the new turbines will go up almost immediately after its arrival and the rest should all be in place by the end of September.

They are expected to be up and running by December.

The repowered farm will have a total combined capacity of 9.2MW, enough to supply more than 7,800 homes, increasing the wind farm's output by roughly two and a half times.

For more information on generating your own power and grants available, visit www.generateyourown.co.uk.