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Long-term storage grows by 49% in 2025 despite the financing crisis
A report by Wood Mackenzie indicates that the deployment of long-duration energy storage (LDES) technologies exceeded 15 GWh in 2025, but declining venture capital investment and falling lithium battery costs are hindering their commercial viability.
Mar 10, 2026
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Small 24/7 clean power commitments could cut costs for long-duration storage
TU Berlin researchers say early demand for round-the-clock carbon-free electricity could help bring advanced energy technologies to market faster through technology learning effects. Grant funding for the research was provided by Google, which has since announced plans to build the world’s largest iron-air battery.
World’s largest compressed air energy storage station now fully operational in China
With 600 MW of installed capacity and 2,400 MWh of storage, the Huai'an Salt Cavern project is now the world’s largest compressed air energy storage facility, surpassing the 300 MW/1,500 MWh project commissioned earlier this year that previously held the title.
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China’s Three Gorges renewables site to include 5 GWh of energy storage
State-owned Three Gorges Energy has revealed plans for a 16.5 GW renewables project in the Taklamakan Desert. The site will comprise 5 GWh of electrochemical energy storage capacity plus 8.5 GW of solar, 4 GW of wind, and 3.96 GW of coal-fired power.
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Swedish greentech specialist Flower wants to expand in Europe
The company has raised more than €45 million ($48.8 million) to build large-scale energy storage facilities with AI-supported optimization platforms in Germany, Austria, Switzerland and other European countries. The planned projects also include a 10 MW battery park in Saarland.
Commercial operation for Chile’s 134 MWh El Manzano battery
Authorization has been granted by the National Electric Coordinator to project developer Enel Chile. El Manzano is the Enel's first battery storage system in the Metropolitan region. It is part of a project that includes a 99.4 MW solar plant.
Germany-based Kyon Energy plans to build and operate large-scale energy storage facilities
The Munich-based contractor wants to broaden its position and become a holistic flexibility provider in the energy market. Kyon Energy says it has 1 GW of approved and ready-to-build projects and more than 7 GW in the pipeline.
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Retrofitting batteries increases solar plant revenue 29%, to 81%
In areas with high population density or abundant solar energy, adding one to four hours of battery storage to a solar power facility can significantly increase site revenue. However, the added value diminishes with storage capacities exceeding four hours.
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