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    Fortescue’s 440 MW Pilbara solar farm: load and stability lessons for mine planners

    March 9, 2026|

    Reviewed by Tom Sullivan

    Fortescue’s 440 MW Pilbara solar farm: load and stability lessons for mine planners

    First reported on Australian Mining

    30 Second Briefing

    Construction is underway on Fortescue’s 440 MW solar farm at Solomon Airport in the Pilbara, set to be Western Australia’s largest single-site solar installation and a key power source for the Solomon iron ore hub. The project will integrate with existing battery energy storage systems such as the North Star Junction BESS to displace a substantial share of gas and diesel generation on the mine’s microgrid. For mine planners and electrical engineers, this scale of behind-the-fence PV will drive new approaches to load management, contingency planning and grid stability.

    Technical Brief

    • Project scale pushes mine power planning towards utility-style grid studies, including contingency and fault-ride-through analysis.

    Our Take

    The 440 MW Solomon Airport solar build slots into a broader decarbonisation push in Fortescue’s Pilbara iron ore operations, which our coverage shows also includes battery-electric locomotives and ultra-class battery-electric loaders and dozers commissioned since early 2026.

    Locating Western Australia’s largest solar farm near the North Star Junction battery energy storage system suggests Fortescue is designing an integrated renewables–storage backbone that can directly support its heavy rail and mine power loads rather than relying on grid tie-ins.

    Within our 1,097 Mining stories, Fortescue features frequently in ‘Projects’ and ‘Sustainability’ pieces, signalling that its Pilbara renewables build-out is now a core strategic lever for maintaining low C1 iron ore costs while managing future carbon and diesel price risk in Western Australia.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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