Under the commercial structure, Gunvor will support the development of generation and storage assets required to supply Firmus’ load, with the battery storage component providing firming capacity to make the renewable energy supply dispatchable.
The deal includes a long-term offtake agreement for GreenPoint Energy’s Koolunga battery energy storage system (BESS), a 200MW/800MWh grid-forming system near Brinkworth in South Australia’s Mid North.
Firmus describes Koolunga as representing more than half of its initial firming capacity commitment, making the battery storage system a central rather than supplementary element of the energy supply architecture.
The grid-forming specification indicates that the Koolunga BESS will provide synthetic inertia and fast frequency response, alongside energy arbitrage, contributing to system stability in a region that already hosts some of the highest renewable energy penetration in any connected grid globally.
The agreement also contains a demand response commitment under which Firmus will reduce its electricity consumption for up to 220 hours per year when wholesale prices exceed agreed thresholds.
