Battery energy storage captures renewable energy when it is available and releases it when it is most needed, ultimately contributing to a more efficient, reliable,and sustainable grid. The power from energy storage systems is firm, flexible, and dispatchable, making it America's most powerful tool for building an affordable, reliable. The International Energy Agency (IEA) emphasises that grid-scale storage, notably batteries and pumped-hydro, is critical to balancing intermittent renewables like solar and wind. It helps manage hourly and seasonal variations in supply, ensuring system stability and resilience as clean energy use. In the transition towards a more sustainable and resilient energy system, battery energy storage is emerging as a critical technology. This simple but transformative function is becoming increasingly important.
[PDF Version]