The World Hydropower Outlook 2026, released by the International Hydropower Association (IHA), reported the highest annual deployment of pumped storage hydropower on record.
Global pumped storage capacity crossed 200 gigawatts (GW) for the first time in 2025, making it the world's largest source of long-duration energy storage.
Pumped Hydro Storage (PHS) stores electricity by pumping water between two reservoirs at different elevations and releasing it to generate power when needed.
India added over 4 GW of hydropower capacity in 2025, surpassing Russia to become the world's 5th-largest country in installed hydropower capacity.
India's pumped storage potential is estimated at 288 GW, with a target of 100 GW by 2035–36. Currently, 10 projects with 7.425 GW capacity are operational.