Hornsdale Power Reserve (2017)
South Australia installed a 100-megawatt lithium-ion battery next to a wind farm after a statewide blackout. Tesla built it in about 100 days under a state government contract.
The battery cut the cost of frequency control services sharply within months of switching on.
It became the reference case showing grid-scale batteries could replace gas peaking plants, and prompted a wave of similar projects.
Kenya's 100-megawatt plan is roughly the same size, and faces the same question: whether batteries beat gas turbines on cost for peak supply.
