HIGGS project (2020–2023) focused on systematic validation of H2 injection at various admixture levels into high-pressure gas transmission networks.
REDEXIS SA
Spanish gas network operator deploying green hydrogen infrastructure, from pipeline admixture testing to full island H2 ecosystems.
Their core work
Redexis is a Spanish gas infrastructure operator that owns and manages natural gas distribution and transmission networks across Spain. In the H2020 program, they contributed their real network assets and operational expertise to hydrogen research — first validating the safety and feasibility of injecting hydrogen into high-pressure gas grids (HIGGS), then scaling up to deploy a complete hydrogen ecosystem on the island of Mallorca including pipelines, fuel cell vehicles, buses, and maritime applications (GREEN HYSLAND). Their core value in research consortia is that they bring live infrastructure, regulatory experience, and industrial-scale deployment capability — not just laboratory results. They are an energy company in active transition from natural gas distribution toward hydrogen as a carrier.
What they specialise in
Both HIGGS and GREEN HYSLAND involve hydrogen pipeline design and operation, from admixture in existing grids to dedicated H2 pipelines on Mallorca.
GREEN HYSLAND (2021–2025, EUR 1.6M) covers end-to-end green hydrogen deployment including production, storage, distribution, fuel cell vehicles, buses, and maritime applications.
GREEN HYSLAND targets Mallorca as a replicable model for clean energy islands under the EU Clean Energy Islands initiative.
GREEN HYSLAND includes hydrogen fuel cell vehicles, H2 buses, and maritime use cases as end-use deployment verticals within the island ecosystem.
How they've shifted over time
Redexis entered H2020 through the gas industry's most cautious hydrogen question: can existing high-pressure pipelines safely carry hydrogen mixed with natural gas? The HIGGS project (2020) reflects this conservative, infrastructure-first mindset — validating admixture levels before committing to larger changes. By 2021, their focus had shifted decisively toward full hydrogen ecosystem deployment: GREEN HYSLAND covers the entire value chain from green hydrogen production to fuel cell cars, buses, and ferries on a real island. This is a textbook energy transition trajectory — from "can our pipes handle H2?" to "how do we build the whole H2 economy?"
Redexis is moving from H2 compatibility testing in existing infrastructure toward becoming an active deployer of integrated hydrogen ecosystems, making them a strong candidate for future IA-type projects focused on real-world hydrogen rollout in Spain and island territories.
How they like to work
Redexis participates exclusively as a consortium partner — they have never led an H2020 project. This is typical of large infrastructure operators who contribute assets and field access rather than research coordination. Their 38 unique partners across 12 countries in just two projects suggests they join well-networked, large-scale consortia rather than small focused teams. Working with them likely means access to real gas network infrastructure for testing and demonstration, but also navigating the governance and decision cycles of a large utility company.
With 38 unique consortium partners across 12 countries from only two projects, Redexis operates in broad, well-connected European consortia. Their network spans energy utilities, research institutes, technology providers, and local authorities — consistent with the multi-actor structure needed for infrastructure deployment projects.
What sets them apart
Redexis is one of the few gas distribution and transmission operators in Spain with direct H2020 participation, meaning they bring regulatory relationships, real pipeline assets, and operational credibility that pure research organizations cannot offer. Their involvement in GREEN HYSLAND — the flagship EU island hydrogen demonstrator — signals institutional buy-in at a level that makes them a credible gateway to Spanish gas infrastructure for any consortium targeting Southern European hydrogen deployment. For scientists or technology providers needing a real-world testbed in Spain, Redexis is a rare find: a large infrastructure company with active EU research experience and a clear hydrogen strategy.
Highlights from their portfolio
- GREEN HYSLANDThe largest H2020 green hydrogen island demonstrator in Spain (EUR 1.6M to Redexis alone), covering the full H2 value chain on Mallorca and positioned as a replication model for EU Clean Energy Islands — Redexis's role as pipeline and distribution operator is central to the project's real-world credibility.
- HIGGSOne of the first EU-funded systematic validations of hydrogen admixture into high-pressure gas transmission networks, directly relevant to the EU's hydrogen backbone strategy and grid decarbonization roadmap.