Demonstration for Long-duration Battery Energy Storage Systems (BATT4EU Partnership)[E8]

From the notice

Call: BATTERIES and ENERGY. Type of action: HORIZON Innovation Actions. Expected Outcome: Projects are expected to contribute to all of the following outcomes: Demonstrated system-level long-duration energy storage (LDES) solutions, explicitly aimed at enhancing grid stability, resilience, and flexibility in Europe. Substantial reduction of Europe's dependence on critical raw materials through the use of abundant, low-cost, and sustainable materials. Contribute to strategic insights for a coherent EU-wide stationary storage deployment strategy, enhancing European energy autonomy and sustainability. Sufficient and reproducible operational data and insights to serve as reliable input towards detailed technoeconomic analyses. Scope: Proposals should focus on system-level demonstrations of innovative long-duration (> 8 hours) battery storage concepts that can effectively support utility-scale energy systems or industrial consumers in achieving energy security and operational sustainability. Projects are expected to cover all the following points: Demonstration of advanced long-duration storage technologies not yet on the market such as novel redox flow batteries (standard or mediated), high-temperature systems, metal-air systems, multivalent chemistries (organic or aqueous), or other non-commercialised technologies or architectures. Assessment and definition of use case(s) intended for the proposed technology (front-of-the-meter grid-scale storage, behind-the-meter large industrial energy consumer, firming of renewable generation) along with quantified impact on improved grid r…[E3]

• ConditionEU grant rules apply: check the call conditions for who can apply, consortium rules and co-funding.[E4]
• The notice data states no restriction on who may bid. Exclusion grounds and selection criteria in the tender documents still apply.

• RiskBidding has not opened. Scope and dates can change before the call for competition.[E5]
• RiskThis is a grant, not a contract. Grants usually need a proposal against the funder's criteria, may need partners and often need co-funding.[E5]
• UnknownWe read the published notice, not the full tender documents.

1. First seen · 28 Oct 2026, 21:22 UTC

   The source published a planning or prior information notice. Bidding has not opened.

   Source document HORIZON-CL5-2027-05-D2-08:31094501:2026-10-07T11:13:19.275+0200

Every fact on this page comes from the published notice. Each entry shows the document and the field it was read from.

1. E1

   The buyer is European Commission.

   Document HORIZON-CL5-2027-05-D2-08:31094501:2026-10-07T11:13:19.275+0200, field /metadata/type/0, read 28 Oct 2026, 21:22 UTC · source ↗ (opens in a new tab)

2. E2

   Proposals must be submitted by 15 Sept 2027, 02:00 Central European time (UTC+2).

   “2027-09-15T00:00:00.000+0000”

   Document HORIZON-CL5-2027-05-D2-08:31094501:2026-10-07T11:13:19.275+0200, field /metadata/deadlineDate/0, read 28 Oct 2026, 21:22 UTC · source ↗ (opens in a new tab)

3. E3

   The buyer describes the requirement in the notice.

   “Expected Outcome: Projects are expected to contribute to all of the following outcomes: Demonstrated system-level long-duration energy storage (LDES) solutions, explicitly aimed at enhancing grid stability, resilience, and flexibility in Europe. Substantial reduction of Europe's…”

   Document HORIZON-CL5-2027-05-D2-08:31094501:2026-10-07T11:13:19.275+0200, field /metadata/descriptionByte/0, read 28 Oct 2026, 21:22 UTC · source ↗ (opens in a new tab)

4. E4

   EU grant rules apply: check the call conditions for who can apply, consortium rules and co-funding.

   “EU call topic”

   Document HORIZON-CL5-2027-05-D2-08:31094501:2026-10-07T11:13:19.275+0200, field /metadata/type/0, read 28 Oct 2026, 21:22 UTC · source ↗ (opens in a new tab)

5. E5

   This call is forthcoming: it is announced but not open yet.

   “31094501”

   Document HORIZON-CL5-2027-05-D2-08:31094501:2026-10-07T11:13:19.275+0200, field /metadata/status/0, read 28 Oct 2026, 21:22 UTC · source ↗ (opens in a new tab)

6. E6

   The notice was published on 5 May 2027.

   “2027-05-05T00:00:00.000+0000”

   Document HORIZON-CL5-2027-05-D2-08:31094501:2026-10-07T11:13:19.275+0200, field /metadata/startDate/0, read 28 Oct 2026, 21:22 UTC · source ↗ (opens in a new tab)

7. E7

   The Funding & Tenders Portal gives the status as forthcoming.

   Document HORIZON-CL5-2027-05-D2-08:31094501:2026-10-07T11:13:19.275+0200, field /metadata/status/0, read 28 Oct 2026, 21:22 UTC · source ↗ (opens in a new tab)

8. E8

   The notice is titled "Demonstration for Long-duration Battery Energy Storage Systems (BATT4EU Partnership)".

   Document HORIZON-CL5-2027-05-D2-08:31094501:2026-10-07T11:13:19.275+0200, field /metadata/title/0, read 28 Oct 2026, 21:22 UTC · source ↗ (opens in a new tab)

9. E9

   The EU contribution per grant is up to EUR 9,400,000 (from EUR 5,000,000).

   Document HORIZON-CL5-2027-05-D2-08:31094501:2026-10-07T11:13:19.275+0200, field /metadata/budgetOverview/0, read 28 Oct 2026, 21:22 UTC · source ↗ (opens in a new tab)

Source: EU Funding & Tenders Portal, © European Union, CC BY 4.0. SLETOR shortened and reformatted the text. Data licence: Creative Commons Attribution 4.0 (European Commission) ↗ (opens in a new tab). Personal contact details in notices are not stored or shown.