Alinta operates a portfolio spanning 3.4GW of installed and contracted generation capacity across coal, gas, wind and solar. The company’s dispatchable portfolio has an availability rate of 93%.
No changes will be made to Alinta’s existing management team and operational structure, with Alinta managing director and CEO Jeff Dimery continuing to lead day-to-day operations, and Sembcorp continuing to support Alinta’s socio-economic investment initiatives for local communities through its Community Development Fund.
Alex Tan said the acquisition strengthens Sembcorp’s presence in a key developed market while providing a scalable platform to accelerate renewables and low-carbon growth.
“By combining Sembcorp’s global renewables expertise and access to capital with Alinta’s strong local workforce and project pipeline, we believe we can contribute meaningfully to Australia’s decarbonisation goals and support long-term employment opportunities in local communities,” Tan said.
Australia has been dubbed a “key market” for Sembcorp’s ambition to grow its renewables capacity to 25GW by 2028, and the company has committed to redeploying capital into Australia to execute Alinta’s pipeline of renewable energy development projects.
A storage pipeline spanning three Australian states
Alinta’s pipeline includes a cluster of battery storage projects at varying stages of development across Western Australia, South Australia and New South Wales.
In South Australia, Alinta is building its largest BESS to date. As Energy-Storage.news reported in April 2026, Alinta commenced main construction works on the 250MW/1,000MWh first stage of its Reeves Plains BESS, located approximately 60km north of Adelaide, with the project set to become one of the largest energy storage facilities in South Australia when operational in 2028.
Construction follows Alinta’s July 2025 final investment decision on what will ultimately become a 500MW/2,000MWh energy hub, with GenusPlus Group appointed as principal contractor.
The Reeves Plains BESS sits adjacent to a proposed 300MW gas-fired power station and will include 194 battery units supplied by CATL.
In Western Australia, Alinta has been expanding storage capacity at its existing Wagerup site.
Alinta received approval to construct a 300MW BESS at Wagerup, near the existing dual-fired gas and distillate Wagerup Power Station, which acts as peaking capacity for the South West Interconnected System.
The new approval came as Alinta was already constructing a 100MW/200MWh BESS at the same site, with the additional capacity designed to support the integration of solar and other intermittent renewable energy sources into the existing network.
In New South Wales, Alinta’s most ambitious long-duration storage project is progressing through its design phase. In 2024, Alinta signed an early contractor involvement agreement with a Gamuda and Ferrovial joint venture for the 7.2GWh Oven Mountain pumped hydro energy storage project, an off-river site within the New England renewable energy zone (REZ), which has held Critical State Significant Infrastructure status since 2020.
The 900MW project is designed to store enough water to provide up to 8-hours of dispatchable energy at full generation.
Interested in Australia? Read Energy-Storage.news’ Energy Storage Summit Australia coverage and related content.