Anglesey Aluminium Metal Renewables has been given consent to construct a biomass fuelled power station on the Welsh island.
The plant at Penrhos Works will generate 299 MW of electricity, enough to power approximately 300,000 homes – equivalent to around a quarter of the homes in Wales.
It will employ up to 600 people during construction with around 100 full-time personnel when operational.
Energy minister Charles Hendry said: “We want a balanced energy portfolio and we want biomass to play a key role in this.
“Biomass power stations such as this one in Anglesey will provide us a reliable, secure, flexible and renewable source of power. I am especially pleased that the plant offers the prospect of so many high-quality jobs in Anglesey”.
The operator is expected to source fuel from both imported and local sources, with imports coming in through the port of Holyhead.