Hornsdale Power Reserve (2017)
Tesla built a 100 MW / 129 MWh lithium-ion battery beside a South Australian wind farm in under 100 days, after a public bet between the state premier and Elon Musk. It was the country's first grid-scale big battery.
The battery cut frequency-control costs and stabilized the grid, turning a political gamble into a working template.
It started an Australian storage boom, and gigawatt-hour-scale projects are now standard in every state.
Blackstone is a far larger standalone descendant of that model, sited for grid services rather than attached to a wind farm.
