HORIZON-CL5-2026-04 (Two-Stage): Next Generation of Renewable Energy Technologies

HORIZON-CL5-2026-04 (Two-Stage): Next Generation of Renewable Energy Technologies

The official CINEA opportunity page still marks this Horizon Europe call as open. It is the energy call HORIZON-CL5-2026-04-Two-Stage, and this page covers its single topic, HORIZON-CL5-2026-04-Two-Stage-D3-02: Next generation of renewable energy technologies. The first-stage deadline has passed, but the second-stage deadline remains 20 October 2026 at 17:00 CEST. That is the live deadline recorded in this page’s metadata.

This is a research call, not a general-purpose clean-tech prize. The topic asks for high-risk, high-return renewable energy technology development that can establish technological feasibility at the relevant research stage. The European Commission’s work programme also sets boundaries around the technologies it will consider, the expected technology readiness level, social-science input, and the cost model. Those details matter more than a broad claim that a project is “green.”

Verified details

The amount is an indicative planning figure, not a guaranteed award. The work programme says that around €4.00 million per project would allow the expected outcomes to be addressed appropriately, while also stating that proposals requesting different amounts may still be submitted and selected. The overall topic budget is €23.50 million, with six projects shown in the call overview. A proposal should therefore make its requested contribution follow from the work plan, participants, milestones, and expected results rather than treating the estimate as an automatic entitlement.

What the topic is meant to fund

The topic sits under the Horizon Europe destination sustainable, secure and competitive energy supply and is intended to strengthen renewable energy technology development in Europe. The expected outcomes include renewable technologies that can support a faster transition to a net-zero greenhouse-gas-emissions economy, while demonstrating low environmental impact, economic viability, public trust, and a durable European innovation base.

The scope is deliberately broad in technology type but narrow in development logic. Examples in the work programme include catalyst development; renewable energy storage systems; integration of renewable technologies into a single generation system; hybrid renewable energy systems; heating and cooling systems; fuel production systems; direct solar fuels and solar-driven chemical processes; hybrid electricity generation across renewable sources; and direct use of renewable energy sources. These are examples, not a licence to combine unrelated technologies. The proposal must show one coherent technical concept and explain why it addresses an important renewable-energy problem.

The expected end point is technological feasibility at TRL 4–5. Activities may start at another readiness level, but the project should be designed to reach that research-validation range by the end. A proposal that is already a commercial deployment project, or one that remains only at basic science without a credible feasibility demonstration, is a poor fit. The work programme also asks applicants to compare the proposed solution with current commercial renewable-energy technologies or solutions on economic performance, environmental impact, energy security, competitiveness, and industrial independence.

Important exclusions and cross-cutting requirements

Four areas are expressly outside this topic because they belong to partnerships or other calls: hydrogen production through electrolysers, fuel cells, basic material research, and batteries. A project may not become eligible simply by adding a renewable-energy label to work that is actually centered on one of those excluded areas. Teams should read the full topic text before deciding whether their main technical problem belongs here.

Environmental performance is part of the technical case. The proposal is expected to address biodiversity, protected species and habitats, pollution, material and water efficiency, geographical footprint, and other resource impacts. Where the concept creates environmental risks, the research plan should include mitigation and a way to test whether those measures work. Bioenergy and biofuel concepts that use biogenic waste must account for resource availability and treatment from the design stage.

The topic also requires effective involvement from social sciences and humanities disciplines and experts. This is not a decorative dissemination task. The work programme connects SSH input with social acceptance, trust-building, local involvement, gender, cultural and socio-economic factors, just-transition concerns, and policy approaches that can adapt to different places and levels of governance. A technical consortium should assign those questions to qualified participants and connect their work to the technology design and deployment pathway.

If a project uses satellite-based earth-observation, positioning, navigation, or related timing data and services, the topic specifies the use of Copernicus and/or Galileo/EGNOS; other data and services may be added. Eligible costs take the form of a lump sum under the Horizon Europe framework. The general Horizon Europe rules still govern admissibility, eligibility, evaluation, and grant setup, so the topic summary should not be used as a substitute for the portal documents.

Who should consider applying

The strongest candidates are research organisations, universities, technology developers, and industrial partners that can jointly take a renewable-energy concept through a rigorous feasibility programme. A useful team normally includes the people who will define the scientific or engineering problem, build and test the technology, measure environmental and economic performance, and connect the result to users, policy, and future deployment.

The call does not promise a fixed award to any named sector or organisation type on the CINEA summary page. Applicants must verify the participant conditions and any consortium requirements in General Annex B and the call-specific Funding and Tenders Portal record. Do not assume that being an SME, university, public body, or large company alone establishes eligibility. Check the legal status, country or associated-country position, participant role, financial and operational capacity, exclusion rules, and any requirements that apply to the proposed action.

A good fit should be able to answer five questions clearly:

1. What high-risk renewable-energy technology is being developed or improved?
2. What technical evidence will establish feasibility at TRL 4–5?
3. Which part of the current commercial solution is being improved, and by how much?
4. How will environmental, social-acceptance, and policy issues be investigated rather than postponed?
5. Why is European collaboration and a European innovation base important to the result?

Current two-stage status and application steps

The first-stage deadline was 31 March 2026 at 17:00 CEST. The official CINEA page still lists the call as open because the two-stage call also has a second deadline: 20 October 2026 at 17:00 CEST. The page should not be read as an invitation to submit a brand-new first-stage proposal after that first deadline. Teams that already passed through the first-stage process should use the current topic record to confirm their access, invitation status, forms, page limits, and second-stage requirements.

For a team preparing its next action, the safe official workflow is:

1. Open the CINEA call page and follow its Funding and Tenders Portal link for the exact topic record.
2. Read the topic text, the Horizon Europe General Annexes, the proposal template, and the current portal instructions. Confirm participant eligibility before committing to a consortium structure.
3. Map the concept to the topic’s RIA, TRL 4–5, scope, exclusions, environmental requirements, and SSH requirement. Remove work that belongs to electrolysers, fuel cells, batteries, or basic material research.
4. Confirm the portal account, organisation registration, participant roles, and proposal permissions early. Use the topic reference rather than a similar energy call when creating or opening the submission.
5. Build the technical plan, feasibility evidence, environmental and social assessment, exploitation path, governance, and lump-sum budget so that each work package supports the stated outcomes.
6. If the team is eligible to proceed to the second stage, upload the stage-specific proposal and supporting information through the portal before 20 October 2026 at 17:00 CEST. Treat the portal record as the final authority if it shows a participant-specific instruction or status that the public call summary does not spell out.

Internal controls should be earlier than the official close. Reserve time to check participant data, budget arithmetic, page limits, mandatory sections, attachments, and the final submission receipt. A technically sound proposal can still fail if the wrong topic record is used or a portal role cannot complete the submission.

What a credible proposal should contain

Start with a precise problem statement. Explain which renewable-energy technology or value-chain bottleneck is limiting cost, reliability, environmental performance, resource use, or European industrial independence. Then define the proposed solution in terms that can be tested. Avoid describing a collection of interesting components without showing how they function as one system.

The research plan should state the starting point, the TRL 4–5 feasibility target, the experiments or models that will test it, the success criteria, and the fallback route if an important hypothesis fails. Include comparison with a relevant commercial baseline. For a hybrid system, make the integration boundary explicit: identify which energy sources, conversion steps, storage elements, controls, or end uses are being combined and why the combination creates value.

The impact case should cover more than a future market forecast. Quantify the expected technical and economic improvement where possible, explain how environmental impacts will be measured, and show how the solution could earn trust and gain local acceptance. The SSH work should inform decisions about policy mixes, governance, participation, gender, cultural context, and socio-economic effects. The consortium should also explain how knowledge, data, prototypes, and results will be managed and shared under the grant rules.

The budget should be a consequence of the work plan. The €4.00 million estimate can help set a scale, but it does not replace a justified lump-sum calculation. Reviewers should be able to see why each participant is needed, how resources map to milestones, and what evidence will exist at each major decision point. A six-project indicative portfolio also means a proposal needs a specific reason to be selected: a clear technical advance, a credible feasibility route, and a strong contribution to a competitive and trusted European renewable-energy base.

FAQ

Is the opportunity closed?

No. CINEA currently marks the call open and lists the second-stage deadline as 20 October 2026 at 17:00 CEST. The first stage closed on 31 March 2026, so a new applicant should confirm in the portal whether it has a valid route into the remaining stage.

Is this a deployment grant?

No. It is a Research and Innovation Action whose expected project endpoint is TRL 4–5. The work should establish technological feasibility, not present a routine commercial rollout as the main activity.

Are batteries, fuel cells, or electrolytic hydrogen eligible examples?

No. The work programme expressly excludes batteries, fuel cells, hydrogen production through electrolysers, and basic material research from this topic’s scope.

Is €4.00 million the maximum award?

No. It is the Commission’s estimate of an appropriate EU contribution per project. The official topic text says that proposals requesting different amounts are not precluded. The total indicative topic budget is €23.50 million.

Where are the forms and final rules?

The official CINEA page directs applicants to the EU Funding and Tenders Portal using the call and topic references. Use that portal record and the linked Horizon Europe work programme and annexes for the submission-specific requirements.

Official sources

• CINEA call page and status: https://cinea.ec.europa.eu/funding-opportunities/calls-proposals/horizon-europe-eu235-million-projects-supporting-sustainable-secure-and-competitive-energy-supply_en
• EU Funding and Tenders Portal topic record: https://ec.europa.eu/info/funding-tenders/opportunities/portal/screen/opportunities/topic-details/HORIZON-CL5-2026-04-Two-Stage-D3-02
• European Commission Horizon Europe 2026–2027 Climate, Energy and Mobility Work Programme: https://ec.europa.eu/info/funding-tenders/opportunities/docs/2021-2027/horizon/wp-call/2026-2027/wp-8-climate-energy-and-mobility_horizon-2026-2027_en.pdf

The CINEA page and the Commission work programme are the basis for the deadline, budget, action type, readiness level, exclusions, and application route recorded here. Recheck the portal topic record before submitting because stage access and participant-specific instructions are controlled there.