
The following page lists all power stations that are larger than 1,000 in installed generating capacity, which are currently operational or under construction. Those power stations that are smaller than 1,000 MW, and those that are decommissioned or only at a planning/proposal stage may be found in regional lists, listed at the end of the page. . Pumped-storage hydroelectricity (PSH), or pumped hydroelectric energy storage (PHES), is a type of used by for . A PSH system stores energy in the form of of water, pumped from a lower elevation to a higher elevation. Low-cost surplus off-peak electric power is typically used t. [pdf]
Pumped storage hydropower facilities use water and gravity to create and store renewable energy. Learn more about this energy storage technology and how it can help support the 100% clean energy grid the country—and the world—needs.
Figure 2: The plot above visualises (logarithmic scale used) the estimated discharge durations relative to installed capacity and energy storage capacity for some 250 pumped storage stations currently in operation, based on information from IHA’s Pumped Storage Tracking Tool.
Pumped storage hydropower has proven to be an ideal solution to the growing list of challenges faced by grid operators. As the transition to a clean energy future rapidly unfolds, this flexible technology will become even more important for a reliable, affordable and low carbon grid, write IHA analysts Nicholas Troja and Samuel Law.
New research released Tuesday by Global Energy Monitor reveals a transformation underway in hydroelectric projects — using the same gravitational qualities of water, but typically without building large, traditional dams like the Hoover in the American West or Three Gorges in China. Instead, a technology called pumped storage is rapidly expanding.
Drax (2019), “Scottish Energy Minister visits Drax’s iconic Cruachan pumped storage hydro power station”, 24 October, press_release/scottish-energy-minister-visits-draxs-iconic-cruachan-pumped-storage-hydro-power-station.
The majority of today’s pumped storage stations were built some forty years ago. Yet, they are still providing vital services to our power systems today. With occasional refurbishment, these long-term assets can last for many decades to come.

In 2009, world pumped storage generating capacity was 104 , while other sources claim 127 GW, which comprises the vast majority of all types of utility grade electric storage. The had 38.3 GW net capacity (36.8% of world capacity) out of a total of 140 GW of hydropower and representing 5% of total net electrical capacity in the EU. had 25.5 GW net capacity (24.5%. In the Alps, where pumped storage was invented in the late 19th century, Switzerland opened a plant in 2022 called Nant de Drance that can deliver 900 megawatts for as long as 20 hours. [pdf]
Small and medium-sized pumped storage power stations are mainly used to store clean energy such as wind and solar energy. Pumped storage has the characteristics of flexible operation and low environmental pressure, so it is a mature energy storage method with high economy and large capacity .
The construction of early pumped storage power stations at home and abroad started from small and medium-sized power stations. In the 1960s, the construction of Hebei Gangnan small hybrid pumped storage power station with an installed capacity of only 11,000 kW filled the gap in China's pumped storage industry.
Pumped storage hydropower facilities use water and gravity to create and store renewable energy. Learn more about this energy storage technology and how it can help support the 100% clean energy grid the country—and the world—needs.
In 2021, the National Energy Administration made it clear in the Medium and Long Term Development Plan for Pumped Storage (2021–2035) that the construction of small and medium-sized pumped storage power stations should be planned according to local conditions in provinces with better resources.
Promoting the construction of flexible and decentralized small and medium-sized pumped storage power stations is conducive to implementing the dual‑carbon goal and improving regional new energy consumption capacity.
Compared to large-scale pumped-storage power stations, which take at least 10–15 years from planning to completion, small- and medium-sized pumped-storage power stations take only 3–5 years, with a shorter revenue cycle and greater investment attractiveness for SMEs (small and medium-size enterprises).

In 2009, world pumped storage generating capacity was 104 , while other sources claim 127 GW, which comprises the vast majority of all types of utility grade electric storage. The had 38.3 GW net capacity (36.8% of world capacity) out of a total of 140 GW of hydropower and representing 5% of total net electrical capacity in the EU. had 25.5 GW net capacity (24.5%. Pumped storage hydropower (PSH) is a type of hydroelectric energy storage. It is a configuration of two water reservoirs at different elevations that can generate power as water moves down from one to the other (discharge), passing through a turbine. The system also requires power as it pumps water back into the upper reservoir (recharge). [pdf]
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