One of the developers, Element Power, says the plan would save UK consumers around £7bn over 15 years compared to other renewable sources.
But concerns are now growing that the turbines needed to provide the power will be of a size and scale not seen in Britain or Ireland before.
Because the bog lands are relatively windless, the company behind the scheme says they will need to stretch high into the sky to catch sufficient wind to generate power.
"They will be spread around 40 clusters in five counties," said Element Power's Peter Harte.
"We felt it was better to built slightly larger turbines but fewer of them and that's the best way to minimise the impact on the local area."
But opponents say that local people have not been consulted and few actually realise just what an impact the turbines will have on the landscape.
My gripe is that as all of this power is going to the UK then the UK should build them on there own land. Am sure the people of the Somerset and Devon would welcome the investment as would no doubt the folk on the Yorkshire moors and other areas of northern England?