Several key technologies are currently under development or in use for long-term energy storage. These include pumped hydro storage, compressed air energy storage (CAES), thermal energy storage (TES), hydrogen energy storage, and advanced battery technologies. Battery Storage Dominance with Rapid Cost Decline: Lithium-ion batteries have become the dominant energy storage technology, with costs falling over 85% since 2010 to $115/kWh in 2024. This dramatic cost reduction, combined with 85-95% round-trip efficiency and millisecond response times, has made. Long Duration Energy Storage (LDES) enables extended storage of power and helps stabilize intermittent power supply when integrated with renewable energy.
