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This round is closed. The next round and similar open calls are listed below. Synced from the EU Funding & Tenders Portal on 9 November 2026.
This call is closed. These open or upcoming calls fund the closest work.
Projects the EU funded under this call, with the organisation that led each one.
CONCRETE4TESConcrete-based thermal energy storage tanks for CSP
Led by Universidad de Lleida · Spain · 2027 · Official record ↗
Based on projects the EU funded on the same subject in this programme.
BEST-StorageBUILDING ENERGY EFFICIENT SYSTEM THROUGH SHORT AND LONG SPECTRUM THERMAL ENERGY STORAGE
HORIZON-CL5-2022-D3-01-14 · 2023 · Official record ↗
ASTERIx-CAESarAIR-BASED SOLAR THERMAL ELECTRICITY FOR EFFICIENT RENEWABLE ENERGY INTEGRATION & COMPRESSED AIR ENERGY STORAGE
HORIZON-CL5-2022-D3-03-01 · 2023 · Official record ↗
HELIOTROPEHighly Efficient and Low-impact InnOvative TheRmal stOrage system for enhanced disPatchability in concEntrated solar tower plants
HORIZON-CL5-2023-D3-02-02 · 2024 · Official record ↗
ECHOEFFICIENT COMPACT MODULAR THERMAL ENERGY STORAGE SYSTEM
HORIZON-CL5-2022-D3-01-14 · 2023 · Official record ↗
DIGISOLARDIGISOLAR: ADVANCED DIGITAL TOOLS FOR OPTIMISED PLANNING, MAINTENANCE AND OPERATION OF SOLAR THERMAL HYBRID SYSTEMS
HORIZON-CL5-2024-D3-02-01 · 2025 · Official record ↗
TREASUREDemonstrating large pit thermal energy storages and improving their components, processes and procedures for an accelerated realisation of 100% sustainable district heating networks in Europe.
HORIZON-CL5-2023-D3-01-14 · 2024 · Official record ↗
HEATWISEHolistic Energy management And Thermal Waste Integrated System for Energy optimization
HORIZON-CL5-2023-D4-01-04 · 2024 · Official record ↗
ENPOWEREnergy Activated Citizens and Data-Driven Energy-Secure Communities for a Consumer-Centric Energy System
HORIZON-CL5-2022-D3-01-08 · 2023 · Official record ↗
Each one links to its EU funding record and the partners it works with: a starting list for building a consortium.
Project results are expected to contribute to some of the following expected outcomes:
Support will be given to the demonstration of innovative thermal energy storage solutions in the following areas: (i) concentrated solar power (CSP) and/or (ii) solar thermal heat and/or cold.
The proposed solutions will have to achieve substantial improvements in terms of performance, cost-effectiveness and life span compared to the current state of the art.
The project must include a clear go/no-go milestone ahead of entering the demonstration phase. Before this go/no-go milestone, the project must deliver the detailed engineering plans, a techno-economic assessment, and all needed permits for the demonstrator. The project proposal is expected to present a clear and convincing pathway and timeline to obtaining the permits.
The project has to assess the sustainability of the proposed solutions in environmental and socio-economic terms. Furthermore, the Commission initiative for Safe and Sustainable by Design[2] (SSbD) sets a framework for assessing the safety and sustainability of chemicals and materials which should be considered as a reference for project proposals.
Plans for the exploitation and dissemination of results for proposals submitted under this topic are expected to include a strong business case and sound exploitation strategy. The exploitation plans are expected to include preliminary plans for scalability, commercialisation, and deployment (feasibility study, business plan) indicating the possible funding sources to be potentially used (in particular the Innovation Fund).
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Activities are expected to achieve TRL 6-7 by the end of the project – see General Annex B. Activities may start at any TRL.
[1] https://research-and-innovation.ec.europa.eu/document/download/3acfa717-b321-4f7d-b8c3-765f507d7de2_en?filename=ec_rtd_swd-2024-160-f1.pdf
[2] https://research-and-innovation.ec.europa.eu/research-area/industrial-research-and-innovation/key-enabling-technologies/chemicals-and-advanced-materials_en
1. Admissibility Conditions: Proposal page limit and layout
described in Annex A and Annex E of the Horizon Europe Work Programme General Annexes.
Proposal page limits and layout: described in Part B of the Application Form available in the Submission System.
2. Eligible Countries
described in Annex B of the Work Programme General Annexes.
A number of non-EU/non-Associated Countries that are not automatically eligible for funding have made specific provisions for making funding available for their participants in Horizon Europe projects. See the information in the Horizon Europe Programme Guide.
3. Other Eligible Conditions
described in Annex B of the Work Programme General Annexes.
4. Financial and operational capacity and exclusion
described in Annex C of the Work Programme General Annexes.
5a. Evaluation and award: Award criteria, scoring and thresholds
To ensure a balanced portfolio, grants will be awarded to proposals not only in order of ranking but at least also to one proposal that is the highest ranked within the area of concentrated solar power (CSP) and at least also to one proposal that is the highest ranked within the area of solar thermal heat and/or cold, provided that proposals attain all thresholds (and subject to available budget). This condition to ensure a balanced portfolio will also be considered to be met if a proposal addressing both areas is funded.
are described in Annex D of the Work Programme General Annexes.
5b. Evaluation and award: Submission and evaluation processes
are described in Annex F of the Work Programme General Annexes and the Online Manual.
5c. Evaluation and award: Indicative timeline for evaluation and grant agreement
described in Annex F of the Work Programme General Annexes.
6. Legal and financial set-up of the grants
described in Annex G of the Work Programme General Annexes.
described in the [specific topic of the Work Programme]
Application and evaluation forms and model grant agreement (MGA):
Application form templates — the application form specific to this call is available in the Submission System
Standard application form (HE RIA, IA)
Evaluation form templates — will be used with the necessary adaptations
Standard evaluation form (HE RIA, IA)
Guidance
HE Programme Guide 
Model Grant Agreements (MGA)
HE MGA 
Additional documents:
HE Main Work Programme 2025 – 1. General Introduction
HE Main Work Programme 2025 – 8. Climate, Energy and Mobility
HE Main Work Programme 2025 – 14. General Annexes
HE Programme Guide
HE Framework Programme 2021/695
HE Specific Programme Decision 2021/764
EU Financial Regulation 2024/2509
Decision authorising the use of lump sum contributions under the Horizon Europe Programme
Rules for Legal Entity Validation, LEAR Appointment and Financial Capacity Assessment 
EU Grants AGA — Annotated Model Grant Agreement 
Funding & Tenders Portal Online Manual 
Funding & Tenders Portal Terms and Conditions 
Funding & Tenders Portal Privacy Statement
Applicants asked the EU 1 questions about this call and the EU published the answers. They clarify the call documents but do not replace them.
From the topic description:
"The project must include a clear go/no-go milestone ahead of entering the demonstration phase. Before this go/no-go milestone, the project must deliver the detailed engineering plans, a techno-economic assessment, and all needed permits for the demonstrator. The project proposal is expected to present a clear and convincing pathway and timeline to obtaining the permits."
For this topic, the deployment of the demonstrator(s) is necessary for achieving the expected TRL.
In line with their obligations under the Horizon Europe grant agreement, beneficiaries must immediately inform the granting authority of events or circumstances likely to affect significantly or delay the implementation of the action. This includes events or circumstances that may delay a go decision or lead to a no-go decision.
If the consortium delays the go/no-go decision, it must justify the delay and consider requesting a suspension of the grant. If the grant is suspended it can either be resumed once circumstances allow the consortium to take the go decision and advance to the deployment phase or it can be terminated if there is no realistic prospect to resume within a reasonable timeframe.
If the decision is negative, the consortium must consider requesting the termination of the grant.
If there are delays in the implementation of the action, the granting authority may apply measures under Chapter 5 of the Horizon Europe grant agreement.
Read it on the EU portal ↗Answered 10 Jun 2025
Confirm the current call documents and submission conditions with the funding authority.
View on EU portal ↗Source: EU Funding & Tenders Portal · synced 2026-11-09
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