As renewable energy generation continues to expand globally, the demand for effective energy storage solutions is growing rapidly. Pumped storage hydropower (PSH) remains the most mature and dependable option to ensure energy security and grid stability, especially when renewable output fluctuates and demand peaks.
This report examines societal and technological trends shaping PSH between 2025 and 2035. It highlights emerging innovations, capacity growth, and the evolving role of PSH in supporting reliable, low‑carbon electricity systems. The report also reviews current regulatory and standardization initiatives, which are essential to enable global deployment, interoperability, and market confidence.
Developed by a multidisciplinary team from power utilities, academic institutions, research organizations, and industry associations under the IEC Market Strategy Board (
MSB), this IEC societal and technology trend report provides a forward‑looking perspective on opportunities, challenges, and standardization needs for PSH. It is available for
free download.
