The Griffith BESS has grown from the configuration that originally secured regulatory support. In February 2025, Eku Energy was awarded a long-duration energy storage (LDES) Long-Term Energy Service Agreement (LTESA) from AEMO Services for a 100MW/800MWh version of the project, which at that stage was planned as an 8-hour-duration system.
The LDES LTESA carries a maximum contract term of 14 years, with financial close originally targeted for the first quarter of 2026. The EPBC submission reflects an expanded 1,000MWh configuration, adding 2-hours of duration to the contracted design.
In its original 800MWh form, the Griffith BESS was one of the first 8-hour battery storage systems to secure an underwriting agreement through the NSW government’s Electricity Infrastructure Roadmap in 2023, alongside RWE’s 50MW/400MWh Limondale project, which is now operational.
The expansion to 1,000MWh and a 10-hour duration place it among the longest-duration standalone battery projects currently advancing through approvals in the NEM.
The project site sits within an established renewable energy precinct. Neighbouring assets include the 36MW Griffith solar PV power plant, already operational; the 275MW Darlington Point solar PV power plant, under development; and the 15MW Yoogali plant.
