List of energy storage power plants
This is a list of energy storage power plants worldwide, other than pumped hydro storage. Many individual energy storage plants augment electrical grids by capturing excess electrical energy during periods of low demand and storing it in other forms until needed on an electrical grid. The energy is later converted back to its electrical form and returned to the grid as needed.
Most of the world's grid energy storage by capacity is in the form of pumped-storage hydroelectricity, which is covered in List of pumped-storage hydroelectric power stations. This article list plants using all other forms of energy storage.
Another energy storage method is the consumption of surplus or low-cost energy for conversion into resources such as hot water, cool water or ice, which is then used for heating or cooling at other times when electricity is in higher demand and at greater cost per kilowatt hour. Such thermal energy storage is often employed at end-user sites such as large buildings, and also as part of district heating, thus shifting energy consumption to other times for better balancing of supply and demand.
For a list of systems and forms of energy storage see energy storage and grid energy storage.
Largest energy storage plants
Table is by default sorted by operational storage capacity in MWh. Minimum capacity for inclusion is either 100 MWh or 100 MW, with a minimum of 1 hour of storage.Largest by technology
| Technology | Name | Energy MWh | Power MW | Hours | Description | Country | Location | Refs |
| Battery, lithium-ion | Moss Landing Energy Storage Facility | 1600 | 400 | 4 | United States | Moss Landing, California | ||
| Battery, lead acid | ||||||||
| Battery, sodium-sulphur | Sodium Sulfur Battery In Abu Dhabi | 648 | 108 | 6 | Virtual battery | United Arab Emirates | Abu Dhabi | |
| Battery, vanadium redox flow | Dalian VFB - UET / Rongke Power | 800 | 200 | The battery arrays approved by the China National Energy Administration will be made up of ten 20MW/80MWh Vanadium Flow Battery energy storage systems connected to the main grid of Liaoning Province. After full commissioning, the VFB energy storage system will be able to peak-shave approximately 8% of Liaoning Province's expected peaking capacity in 2020. In addition, the large-scale battery will form an additional load center, which will enhance grid stabilization including securing the power supply and providing black-start capabilities in the event of emergency. This project will be deployed in two phases, each with 100MW/400MWh. The first phase will be finished around the end of 2017 and the second will be finished around the end of 2018. This project is approved by China National Energy Administration, and the owner is a JV with the major shareholder being a local utility company, and the minor being RONGKE POWER. | China | Dalian | ||
| Compressed air storage | Huntorf CAES Plant | 870 | 290 | First commercial CAES plant, operational since 1978, using nuclear-sourced night-time power to compress and inject the air into two caverns of 310,000 m³ total volume. The 600 m cavern depth ensures the air's stability through seasonal temperature changes, and guarantees the specified maximum pressure of 100 bar. One cavern is cycled daily; the other serves as backup when the nearby nuclear power plant goes offline. | Germany | Huntorf | ||
| Pumped hydro storage | Fengning Pumped Storage Power Station | 40,000 | 3,600 | China | Fengning Manchu Autonomous County, Hebei Province | |||
| Flywheel | Beacon New York Flywheel Energy Storage Plant | 5 | 20 | The flywheel plant is used for frequency regulation in the NYISO service area. It consists of 200 individual spinning masses. | USA | New York |