More than 400 people attended the planning meeting
The firm hoping to build three giant wind turbines on the Isle of Wight has said it is disappointed the planning application was refused.
The island's planning committee voted six to one against the bid by Cornwall Light and Power (CLP) to put the 125m (410ft) structures on Cheverton Down.
Planning permission is already in place for three smaller turbines at the site.
Campaign group The Wight Against Rural Turbines (Thwart) said it was pleased with the decision.
Supporters of the scheme at yesterday's planning meeting said the decision dealt a blow to the council-led "Eco Island" strategy, which aims to have the lowest carbon footprint in England by 2020.
CLP development manager Steve Allen said: "I think it's a massive blow to the Eco Island. Unfortunately there can be no Eco Island without wind turbines.
"We have to put these things into perspective. First of all there is already a planning consent on Cheverton Down for three turbines and what we are proposing to do is use more efficient technology which would add ten times the energy output of those that are already consented."
In 2003 permission was granted for three 52m (171ft) turbines on Cheverton Down.
In February, Thwart raised a blimp above the site to show how tall the proposed larger structures would be.
Thwart chairman John Gallimore said: "We feel the Isle of Wight geographically is far too small.
"It's a very compact landscape and right in the middle of the AONB (area of outstanding natural beauty) was completely the wrong place for structures of this size."
CLP said the turbines would have produced enough electricity to power more than 4,700 homes.