Rio Tinto and Edify Energy sign landmark solar and battery agreement for Rio Tinto’s Gladstone operations

Rio Tinto and Edify Energy have signed two new solar and battery hybrid services agreements (HSAs) to increase the supply of reliable, competitively priced electricity to Rio Tinto’s Gladstone aluminium operations in Queensland.

Under the agreements, Rio Tinto will purchase 90% of the power and battery storage capacity generated by the Smoky Creek & Guthrie’s Gap Solar Power Stations for 20 years. Edify Energy will build, own, and operate the projects, with construction due to begin in late 2025 and targeting completion in 2028.

Located in Central Queensland, the adjacent Smoky Creek & Guthrie’s Gap Solar Power Stations, will together feature 600MWac of solar and 600MW / 2,400MWh of battery storage.

When combined with the 2.2GW of renewable wind and solar PPAs Rio Tinto announced for its Gladstone operations in 2024, the Smoky Creek & Guthrie’s Gap agreements help secure a total of 2.7GW of future wind and solar energy in Queensland.

Together, the four contracted projects are expected to supply 80% of Boyne smelter’s annual average electricity demand, reducing the smelter’s scope 1 and 2 emissions by 70%, or 5.6Mt of carbon dioxide equivalent per year. This is the equivalent of removing about 2 million internal combustion engine cars from the road.

Rio Tinto's 90% share of the Smoky Creek & Guthrie's Gap battery system capacity amounts to 2,160MWh, which will provide about 30% of the firming required to repower the Boyne smelter with renewable energy. It will store green energy for reliable use during peak demand periods or low solar output, which will improve stability and resilience of Queensland’s power network.

Rio Tinto's integrated aluminium production chain in Queensland is a significant economic driver for the state and Australia, directly employing over 4500 people and supporting thousands more livelihoods. The company's operations in Gladstone alone account for more than 3000 jobs, with 1000 of those at the Boyne smelter.

Rio Tinto’s three production assets in the Gladstone region are the Boyne aluminium smelter, the Yarwun alumina refinery and the Queensland alumina refinery.