More than 10pc of the UK's domestic energy will be supplied from a wind farm set to be built off the north Norfolk coast.
Vattenfall, the firm behind the Norfolk Offshore Wind Zone, has increased its capacity to 4.2GW and will now power 700,000 more homes compared to its original design.
This will see the turbines supply electricity to 4.6m houses across the country.
Rob Anderson, project director of Vattenfall's Norfolk Zones, said that the increase is due to the project using "innovative" technology and being "able to maximise its design".
He added: "The Norfolk project will be one of the world's largest wind farms when completed."
Despite the massive increase in power generated from the wind zone, Mr Anderson said that it will use the same amount of onshore cables and infrastructure as before.
The firm stated that it will have no extra impact on local residents, with its construction taking place within existing plans.
Set to be built 50km off the Happisburgh coast, the Norfolk Wind Zone will be made up of two massive wind farms - Norfolk Vanguard and Norfolk Boreas.
Construction on Norfolk Boreas is due to start in the autumn of next year.
The project is expected to create hundreds of skilled, permanent jobs in the region, with the Vattenfall keen to recruit workers living within a one hours drive from Happisburgh.
It will also require a large supply chain that should benefit small and medium businesses across Norfolk.
"Along with helping to boost the East Anglian economy with jobs, skills and supply chain opportunities, the Norfolk Offshore Wind Zone will power even more UK homes with clean energy while turning the region into a powerhouse of renewable energy,” said Mr Anderson.
He added: "We're really excited about the opportunity to do this project."
Plans to build the wind farms got the government go-ahead in 2021.
Earlier this year the firm received a significant funding boost from the government when it won a bid for a guaranteed base line price for the electricity the wind zone will generate.
The Norfolk Wind Zone is part of a number of renewable energy projects planned for the region, including proposals to turn Bacton into a hydrogen energy plant and plans to build the nuclear power station Sizewell C in Suffolk.
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