The success of renewable energy transition in Australia, particularly focusing on the role of battery storage in stabilizing the grid, has been driven by science, technology, and economics. South Australia's energy plan, including the use of large-scale battery storage, has become a global template for energy security, with the state aiming for 100% "net renewables" by next year. The rise in battery storage technology, exemplified by the 100 MW Hornsdale battery, has shown the potential for large-scale battery storage to prevent blackouts and improve grid security. Lessons learned from past blackouts have led to a greater reliance on wind farms and their voltage control strategies, demonstrating the feasibility of operating a power system with high renewable penetration. The industry's success in transitioning to renewables and battery storage has increased confidence in market operators and shown that these solutions are cost-effective alternatives to fossil fuels in addressing climate change.