Sandfire Resources says its $40 million off-grid solar power system in Western Australia is on track for construction to begin this month.

The gold and copper miner operates the DeGrussa mine, near Wiluna, and is set to build the world's largest solar array system of its kind at the mine.

German company Juwi Renewable Energy will build the 34,000 solar array panels over a space equivalent to the size of 11 Melbourne cricket grounds.

The 10.6 megawatt solar array will reduce the mine's carbon emissions at its diesel power station by 12,000 tonnes each year.

Chief operating officer Michael Spreadborough said he hoped it would inspire other miners to embrace renewable energy.

"We've had extreme interest from many of our peers to understand the reasons we're doing this work and how we're going about it," he said.

"So I think you will see an acceleration of the Australian mining industry looking at renewable energy.

"Our power is produced by the diesel power station which emits CO2, so we'll reduce emission at the site by 15 to 20 per cent.

"We've continued to do all the work to make the approvals happen for the solar array to start construction in June."