At the end of 2018, the ILF Group, which operates internationally, was commissioned by EnergyAustralia to carry out an independent review of the Cultana seawater pumped hydropower storage project near Port Augusta.
The power plant is designed to have a power output of 225 MW and an energy storage capacity of approximately eight hours. This is equivalent to constructing 126,000 domestic battery storage systems, with the associated costs amounting to just a third. In addition to the upper and lower reservoirs, the Cultana project will also comprise two penstocks, a powerhouse containing two Francis pump turbines, a tailwater channel, a seawater inlet and outlet structure and a connection to an existing 275 kV grid and auxiliary facilities. The storage reservoirs will be supplied with water from the Spencer Gulf.