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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.
H4PERIONHydrogen FOR Performance Enhancement and Reliable Ice OperatioN
Led by Vaasan Yliopisto · Finland · 2026 · Official record ↗
Based on projects the EU funded on the same subject in this programme.
REALCHEMReal-world emission Experiments and comprehensive Assessment of Low-carbon fuels: towards Clean Hard-to-Electrify traffic Modes
HORIZON-CL5-2024-D5-01-18 · 2025 · Official record ↗
IsoPROPELCARBON-NEUTRAL PRODUCTION AND DIRECT FUEL-CELL DEPLOYMENT OF ISOPROPANOL AS ENERGY CARRIER
HORIZON-CL5-2024-D3-02-02 · 2025 · Official record ↗
AENEASinnovAtive ENErgy storage systems onboArd vesselS
HORIZON-CL5-2022-D5-01-02 · 2023 · Official record ↗
CARBOWAVECARBON FIBRE PRODUCTION VIA LOW ENERGY MICROWAVE ABSORPTION
HORIZON-CL5-2024-D4-01-03 · 2025 · Official record ↗
CIRCULAIRCircular fuel supply for air transport via negative emission HTL conversion
HORIZON-CL5-2021-D3-03-09 · 2023 · Official record ↗
ALL-IN ZeroRenewable and flexible fuel power generation technology enabling the multi-sectorial decarbonization with Zero emissions
HORIZON-CL5-2021-D2-01-08 · 2022 · Official record ↗
FOREMASTFreight vOlumes transfer from Road to waterborne transport, using zero-EMission, Automated, Small and flexible vessel protoTypes
HORIZON-CL5-2023-D5-01-16 · 2024 · Official record ↗
ZIMBAZero-carbon Industrial heat production by aMmonia water aBsorption heAt transformer
HORIZON-CL5-2023-D3-02-04 · 2024 · Official record ↗
Each one links to its EU funding record and the partners it works with: a starting list for building a consortium.
Expected Outcome:Project results are expected to contribute to all of the following outcomes:
Scope:The International Maritime Organisation (IMO)’s Greenhouse Gases (GHG) revised strategy of 2023 and the FuelEU Maritime Regulation have set ambitious goals to reduce the use of fossil fuels in waterborne transport. To that aim, maritime operators are working to replace the currently used engines with alternative power conversion systems that will allow the use of low and zero-carbon fuels for propulsion. Among all ship-types, the decarbonisation of long-distance shipping will rely the most on successful innovative solutions with high power outputs. Apart from greenhouse gas emissions, other pollutants and harmful ship emissions (e.g., NOx, SOx, PM, etc.) coming from the fuel mix currently used in waterborne transport and from low and zero-carbon fuels need to be lowered and eliminated where possible. This topic aims to integrate and further develop various fuel cells (FC) and internal combustion engines (ICEs) solutions for waterborne transport running on low and zero-carbon fuels and scaling-up their technological maturity on-board. Actions addressing these challenges should also align with the European Economic Security Strategy.
Proposals should address one of the two following areas:
Area A: Projects demonstrating FC solutions should deliver results that will reach a combined power output of at least 5 megawatts (MW) with energy supply provided by low and zero-carbon fuels;
Area B: ICEs solutions should demonstrate a combined power output of at least 10 MW with at least 85% of the energy supply provided by low and zero-carbon fuels.
The two selected projects will be complementary, not demonstrating the same areas describe above. If in one of the areas no proposal meets the minimum thresholds, then only one project will be funded under this topic.
Regarding GHG emission reduction, proposals should follow the provisions of FuelEU Maritime and the IMO GHG reduction strategy on fuel standards.
Proposals should address all the following aspects, noting that appropriate consideration should be given to selecting a suitable design approach:
Additionally, proposals are invited to prove the utilisation of big data and data science technologies to determine real-world references regarding ship performance, environmental impacts and maintenance needs of ships operating on low and zero-carbon fuels.
This topic implements the co-programmed European Partnership on ‘Zero Emission Waterborne Transport’ (ZEWT). As such, projects resulting from this topic will be expected to report on results to the European Partnership ‘Zero Emission Waterborne Transport’ (ZEWT) in support of the monitoring of its KPIs.
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
The following exceptions apply: subject to restrictions for the protection of European communication networks.
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 applications not only in order of ranking but at least also to one proposal that is the highest ranked within area A or B, as described in the scope of the topic, provided that the applications attain all thresholds (and subject to available budget).
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
The following cost categories will be ineligible costs: equipment costs linked to Carbon Capture Storage and Carbon Capture, Storage and Utilisation.
described in Annex G of the Work Programme General Annexes.
Not applicable.
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 
HE Unit MGA 
Call-specific instructions 
Not applicable.
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 11 questions about this call and the EU published the answers. They clarify the call documents but do not replace them.
Both are eligible, but air pollution requirements (including the air pollution requirements) need to be fulfilled.
Read it on the EU portal ↗Answered 10 Jun 2025
Yes, the vessel can operate outside of the EU maritime space.
Read it on the EU portal ↗Answered 10 Jun 2025
Yes. Vessels can have non-EU flags. “Proposals are encouraged to prioritise shipyards, equipment manufacturers and suppliers located in the EU and EEA.”.
Read it on the EU portal ↗Answered 10 Jun 2025
The topic requests a demonstration of sulphur oxides emissions reduction below 90% of a SOx baseline which is equivalent to SOx emitted by fuel oils complying with the requirements on their sulphur content set out in Regulation 14 of Annex VI to MARPOL Convention, which is transposed in EU law through the Sulphur Directive (EU) 2016/802.
Read it on the EU portal ↗Answered 5 Sept 2025
By “combined power output”, the topic refers to the total power installed coming from one single type of power conversion system, but which could have several similar sub-systems installed. For instance, when the topic says, “Fuel cell solutions are expected to deliver results that will reach a combined power output of at least 5 MW”, there are no single 5MW marinized fuel cells stacks on the market that can be installed off the shelf, so we expect that several FC stacks will be installed. The total power output of the series of stacks should be then at least 5MW.
Read it on the EU portal ↗Answered 19 Jun 2025
The requirement asks for the development of parameters addressing all relevant items ensuring the technical compatibility between the fuel and energy conversion system taking into consideration all aspects in the scope. The parameters should be developed considering at least: i) the materials and components used in construction, ii) the safety of the power conversion system and its integration on-board, and iii) the reduction of GHG and air pollutant emissions.
Read it on the EU portal ↗Answered 19 Jun 2025
Any of the 6 ship types considered in the zero-emission waterborne transport partnership SRIA can apply: offshore, long-distance, inland waterways, ferries, cruises, short sea. However, the topic specifically requests a demonstration in a vessel above 5,000 Gross Tonnage (GT), and replication studies in 3 other ship-types.
Read it on the EU portal ↗Answered 10 Jun 2025
Ships with higher power requirement can also apply as long at the FC system is 5MW or larger.
Read it on the EU portal ↗Answered 10 Jun 2025
No preference, but the sustainable fuels must adhere to the sustainability criteria of EU, such as the reviewed Renewable Energy Directive and the FuelEU Maritime legislation.
Read it on the EU portal ↗Answered 10 Jun 2025
This is the total power output from the combination of FCs stacks (Area A) or the total power output of the combination ICEs (Area B) installed onboard. For each area, a minimum power output is required. There is no need that the ship runs fully on one of the technologies mentioned in these areas. Beyond the minimum required, the demonstrator can integrate and combine different technologies and solutions.
Read it on the EU portal ↗Answered 10 Jun 2025
No, it does not allow for a lower-capacity demonstrator. They refer to either: A) Demonstrator of FC with at least 5MW with low or zero carbon fuel or B) ICE combined with low or zero emission with at least 85% energy from the latter of at least 10MW.
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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