Energy and Water HUB
When green meets blue
REWAN, the HUB connecting solutions seekers and providers in the energy and water sectors towards the environmental transition through collaboration and innovation
HUB created by the Clusters TWEED et H2O
Our services
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Mapping
Mapping of stakeholders
Learn more >Bringing together energy and water sector stakeholders and positioning their expertise along the value chains.
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Networking
Encounter between players
Learn more >Organising meetings between stakeholders, in the form of working groups, B2B sessions, seminars or international missions.
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Innovation
Supporting projects
Learn more >Identifying opportunities and challenges, supporting innovative projects and determining appropriate funding.
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International
Promoting members’ expertise
Learn more >Supporting members in the promotion and dissemination of their solutions internationally.
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Partnerships
Create sustainable partnerships
Learn more >Building sustainable partnerships at local and international level.
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Knowledge
Center of expertise
Learn more >Stimulating the sharing of knowledge and information, and mobilising the expertise of our members.
Our 12 Topics
Coordinating high-value, high-expertise and export-potential sectors in the fields of energy and water in Wallonia.
The structuring of these sectors crystallises around 12 priority topics, each encompassing different challenges, ecosystems of stakeholders, value chains, partnerships and projects.
Expertise in strategic infrastructure
The Clusters TWEED and H2O offer specialist expertise in infrastructure relating to electricity grids, water, district heating networks, hydrogen, CO2 and electromobility.
Our ecosystems & Structural initiatives







Latest News & Events
News
News
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Feedback • La journée de rencontres autour des solutions énergie, eau et décarbonation des entreprises en Wallonie • 31 mars 2026
02/04/2026
Nearly 350 professionals from the energy and water sectors attended the event. This figure…
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Feedback • ECOFLEX Final Event • September 11, 2025
16/09/2025
On September 11, the ECOFLEX project held its final event at the BeClimate Hub in Brussels. It was…
Events
Remarkable infrastructures for Energy, Hydrogen & Water in Wallonia and abroad • Webinar • 28 May 2026
The Clusters TWEED and H2O are proud to invite you to this webinar that marks the official launch of hte VirtuWal Lab ! Take this opportunity to discover this immersive tool, learn about the objectives behind and get in touch with other international clusters.
Summer event • Blue Business Parks • Dream or reality? 2th June 2026
The H2O Cluster warmly invites you to attend its Summer Event 2026, which will take place on Tuesday 2 June in Charleroi. The Blue Business Parks will be at the heart of the discussions at this water-themed event.
Summer Event • Wall4GRiD • Débloquer la flexibilité dans les entreprises en Wallonie • 25 juin 2026
Flexibility at the heart of reform in Wallonia! On 13 May, Wallonia’s Minister for Energy, Cécile Neven, announced the adoption at first reading of the draft decree on network access, placing flexibility, prioritisation and capacity optimisation at the heart of the response to growing strain on the electricity networks.
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Projets
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Green SKHy
Green SKHy >Green SKHy contributes to the energy transition and promotes the development of the clean hydrogen sector by reducing the obstacles to the European recognition of skills and by developing new transnational training schemes.
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STEPinBEL
STEPinBEL >The objective is to assess the potential of new Pumped-Storage Power Stations (PSPS) in Belgium to strengthen the flexibility and resilience of the electricity grid.
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Water4All
En savoir plus >Cluster H2O is collaborating on the Water4All partnership – water security for the planet – a scientific research funding programme on fresh water.