Hornsdale Power Reserve (2017)
Tesla built a 100 MW/129 MWh battery in South Australia in under 100 days after a state blackout. It responded to grid frequency changes faster and cheaper than gas plants, and its operator locked in revenue from grid stability markets.
Cut grid stabilization costs in South Australia and expanded to 150 MW within three years.
Provided the first commercial proof that big grid batteries pay for themselves, kicking off a global grid-storage boom.
Hornsdale showed batteries could be reliable grid assets. Robins is Georgia taking that model to scale, paired with solar.
