Long-duration energy storage Archives - Energy Storage

Long-duration energy storage

All Long-duration energy storage news

Grid-scale

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.

Pilar Sanchez Molina

Mar 10, 2026

Policy

Spanish government plans to accelerate permitting for hydroelectric plants Consultation now open on plan to streamline permitting process for reversible hydroelectric plants. The government wants to integrate energy authorization, environmental assessment and water concession into a single procedure.

Pilar Sanchez Molina

Mar 05, 2026

Grid-scale

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.

Mar 04, 2026

Grid-scale

European BESS capacity to hit 80 GW by 2030, Aurora forecasts Market report finds Europe's deployed battery energy storage system (BESS) capacity now exceeds 17 GW in power output terms. Four-hour batteries forecast to attract more than half of expected investment from 2026 to 2030.

Feb 23, 2026

Industry

ESS acquires VoltStorage GmbH to accelerate long-duration energy storage US-based ESS Tech has acquired the assets and intellectual property of Germany’s VoltStorage, bringing two iron flow battery technologies together under one roof.

Feb 18, 2026

Grid-scale

Long-duration storage as an antidote to grid congestion, renewables curtailment RenewaFLEXNL, a three-year Dutch initiative led by TNO, aims to accelerate long‑duration energy storage (8–100 h) to reduce grid congestion and better integrate renewable energy. pv magazine spoke with the project coordinator, Iraxte Gonzalez Aparicio, about diverse storage technologies, real-world applications, regulatory guidance, and energy management system tools to support large-scale solar‑plus‑storage deployment in the Netherlands and beyond.

Emiliano Bellini

Feb 12, 2026

Technologies

Ore Energy completes 100-hour iron-air storage system for EDF in France The EU-funded pilot – the first of its kind in Europe -demonstrated the ability of the company’s iron-air LDES technology to deliver multi-day energy storage in a real-world utility environment.

Feb 10, 2026

Flow batteries

CMBlu Energy to supply Uniper with 5 GWh of SolidFlow battery storage technology The ten-year agreement sees CMBlu Energy supply its SolidFlow battery technology to the German energy company from 2027. Uniper intends to deploy the battery systems in tranches of at least 100 MWh.

Sandra Enkhardt

Feb 03, 2026

Products & Services

Tesla and lithium-ion top new long-duration storage leaderboard, Energy Dome in the mix The snapshot of the long-duration industry suggest big changes to come as major decisions get made for technologies and vendors.

Jan 30, 2026

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High-level discussions on solar and energy storage across Europe. Experts explore how to plan and execute bankable BESS projects, what quality and warranty factors matter, and how energy management systems optimize residential and C&I applications, including heat pumps, EV charging, and new market opportunities.

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Connect with Europe’s energy storage leaders at the Battery Business & Development Forum 2026 Frankfurt and gain insights into evolving business models, financing strategies, and market trends.

March 31 – April 1, 2026 | In Person Event

Hotel Meliá Frankfurt City | Frankfurt am Main, Germany

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SunRise Arabia Clean Energy Conference 2026

Saudi Arabia is accelerating its clean energy transition. Join the third SunRise Arabia Clean Energy Conference in 2026 to explore how solar PV and energy storage are powering the Kingdom’s growing digital economy, including data centers. Policymakers, investors, and innovators will share insights on technology, deployment strategies, and long-term value creation in Saudi Arabia’s evolving energy landscape.

9:00 am – 6:00 pm, AST | April 22, 2026

Riyadh, Saudi Arabia

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