The site was Scottish Power Renewables’ first operational windfarm in the UK when it came online and a £20 million project has been completed to upgrade the turbines.
The 15 original 400Kw Vestas turbines have been replaced by 10 Gamsea turbines that have a capacity of 2MW each.
Keith Anderson, chief executive of Scottish Power Renewables said: “Cornwall was a UK pioneer in embracing renewable energy and developing wind power projects on a commercial scale.
“Carland Cross alone has produced enough electricity to meet the demand of 3,300 homes every year since 1992 and the new project should meet the demands of around 12,000 homes per year.
“It is a very well located site with good wind speeds, good access and grid connection and I am delighted that Carland Cross will remain an important part of our company’s operations for decades to come.”