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Horizon Europe Cluster 5 — Climate, Energy and Mobility

Horizon Long-Duration Battery Storage Demonstration

Funds two €9.4M innovation projects that demonstrate long-duration battery storage for resilient, sustainable European energy systems.

ScheduledEuropean CommissionEU

Europe needs storage that can hold energy for many hours while supporting a more resilient and flexible electricity system. This scheduled Horizon Europe Innovation Action funds two €9.4 million projects to demonstrate system-level long-duration battery energy storage for utility-scale systems or large industrial consumers.\n\nProjects must demonstrate innovative battery technologies or architectu

Demonstrate system-level long-duration battery energy storage of at least 8 hours for utility-scale energy systems or large industrial consumers. Cover innovative non-commercialised redox-flow, high-temperature, metal-air, multivalent or other battery concepts; define and quantify front-of-the-meter, behind-the-meter or renewable-firming use cases; assess hybridisation with complementary storage; prioritise abundant, low-cost and sustainable materials with scalable European supply chains; integrate digital SOC, SOH, lifetime, BMS and EMS capabilities; and provide measured techno-economic, safety, SSbD, exploitation and deployment evidence for Batt4EU.

CycleiHow often this grant runs — e.g. annually, on a rolling basis, or a one-off call.Biennial
Next deadlineiThe next date applications are due. Rolling means you can apply any time.15 Sept 2027
Decision timeiTypical time from the deadline to the funder's decision.22 weeks
Project durationiHow long the funded work is expected to run.
Award typeiThe form of funding — grant, equity, loan, tax credit, etc.Grant
Match fundingiThe share of project costs you must cover yourself. 0% = fully funded.30%
Funding pooliThe total budget available across all awards in this round.€18.8M

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Last verified: 25 Aug 2026Source: ec.europa.eu