Delta & Fortescue target Pilbara mine decarbonisation

Delta Electronics and Fortescue are working together on technologies to support the decarbonisation of Fortescue's mining operations, with a focus on its Pilbara sites.

Fortescue's strategy combines solar and wind generation, battery storage and electrified mining equipment as part of a broader shift away from fossil fuels in its Australian terrestrial iron ore operations. The miner aims to eliminate Scope 1 and 2 emissions from those operations by the end of 2030, with most of its green power generation for decarbonisation expected by 2028.

The project is built around a closed-loop energy system. Renewable power generated in the Pilbara would be stored in battery energy storage systems and then used across vehicles, machinery and automated equipment at mine sites.

The broader economic backdrop is significant for both the mining sector and energy suppliers seeking a role in its transition. The industry contributes about AUD $385 billion to Australian exports and employs more than 300,000 people, according to the Department of Industry, Science and Resources.

Fuel costs

A central driver of the shift is cost control. Diesel use across long distances in the Pilbara has exposed Fortescue's operations to fuel price volatility, making a major part of mine planning harder to predict.

Its Green Grid project is designed to reduce that exposure. The project would combine 1.5GW of solar, 900MW of wind and 5GWh of battery storage to supply Pilbara operations and meet rising regional energy demand.

Battery storage has become a key technology in that strategy because it allows renewable generation to be used as firm supply when mine operations require it. The same energy system is also expected to support digital tools, automated equipment and electric vehicles being introduced across sites.

Delta said those systems align with its pit-to-port mining technology portfolio, which links energy infrastructure with operational technology used across extraction, transport and site management. It is positioning itself as a supplier of the underlying power and storage systems rather than as a mine operator.

Commercial logic

At a discussion hosted by Delta in Sydney, Fortescue Senior Manager of Decarbonisation Operations Zac Carlton said the company's operating priorities remained safety, production and cost. He said the shift also reflected a broader view of mining's impact.

Carlton said Fortescue wanted to "think about what we're doing in the world."

The commercial case extends beyond emissions targets. By generating, storing and managing more of its own electricity, Fortescue is seeking greater control over energy supply, lower exposure to external fuel markets and a more predictable base for mine production.

There may also be advantages for early adopters if the model proves transferable. Carlton said there was an advantage to "holding the rulebook and how decarbonisation in mining can be done as a commercial opportunity."

That reflects a broader trend in mining, where energy security has become more closely linked to productivity and margin protection. Companies that can stabilise power costs and reduce dependence on imported fuels may gain more flexibility to invest in automation and other efficiency measures.

Delta's role

For Delta, the Fortescue work is a prominent example of how industrial energy suppliers are targeting heavy industry as demand grows for electrification and storage. It has worked on large renewable energy and storage projects in other markets, including a solar park in Germany using 3,500 of its PV inverters and producing 650 megawatts of operational capacity.

That overseas experience forms part of Delta's pitch to Australia's mining sector, where remote operations and high diesel consumption make electrification technically complex and capital intensive. Suppliers that can demonstrate deployment at scale may be better placed to win long-duration work as miners redesign site infrastructure.

Steve Davis, Sales Director, Delta Electronics Australia, said: "What we heard from Fortescue reflects a broader shift we're seeing across the sector. Mining operators are moving from asking whether to decarbonise, to asking how to do it profitably. Delta's role is to make sure the energy infrastructure underneath that shift is ready to scale, wherever a mining business is starting from."

Fortescue has also pointed to improving economics for renewable systems, saying "solar and battery costs have fallen by around 90 per cent since 2010, making renewable energy the most practical way to power our operations". That trend is helping turn decarbonisation from a compliance issue into an operating and capital allocation decision for miners.

As mine operators assess similar questions around resilience, cost and energy supply, large-scale battery storage and on-site renewables are moving closer to the centre of mine design in Australia.