A billion-dollar wind farm with the potential to power more than 300,000 homes has opened in central Queensland after more than three years of construction.

One of the country's biggest wind farms, Clarke Creek, situated between Rockhampton and Mackay, is backed by billionaire Andrew "Twiggy" Forrest.

"Capital is your major cost and then maintenance, and that is an unbeatable combination against oil, gas, fossil fuels," Mr Forrest said.

" Even dragging logs up to your cave and lighting a fire as a caveman would cost you more than the wind here. "

The company behind the farm, Squadron Energy, is a subsidiary of Tattarang, a private investment group owned by Andrew and Nicola Forrest.

The newly erected 100 wind turbines, each standing 207 metres tall, have a generation capacity of 450

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