Spain, Denmark Could Develop European Green Hydrogen Corridor for €2/Kg by Combining Solar and Offshore Wind

Why It Matters

The low‑cost, off‑grid hydrogen corridor demonstrates a scalable pathway for Europe to meet decarbonisation targets while reducing reliance on fossil‑based energy imports. It also signals a viable business case for investors and policymakers to support cross‑national renewable infrastructure.

Key Takeaways

• Spain's solar yields 1.7 MWh/kW yr, Denmark's wind >50% capacity factor
• Hybrid PV‑LOHC and wind‑LOHC model hits ~€2 /kg hydrogen cost
• LOHC storage outperforms salt caverns and pressurised tanks in flexibility
• Corridor could export up to 100 TWh of green hydrogen annually
• Policy stability needed; cost variance can exceed 30 %

Pulse Analysis

Europe’s hydrogen ambitions face a geographic paradox: the regions richest in renewable resources are often far from the industrial hubs that will consume the fuel. Spain’s sun‑rich plains generate abundant daytime electricity, while Denmark’s offshore wind farms deliver steady output even in winter. By linking these complementary assets, the proposed corridor leverages seasonal diversity to smooth production, eliminating the need for costly grid interconnections and enabling a truly off‑grid value chain. This approach aligns with the EU’s goal of delivering green hydrogen at competitive prices, a prerequisite for large‑scale decarbonisation of transport, industry, and heating.

The study’s techno‑economic model pinpoints storage as the decisive cost lever. Liquid organic hydrogen carriers (LOHC) emerged as the most flexible and cost‑effective solution, achieving a levelised cost of hydrogen (LCOH) around €2.15 /kg ($2.30), marginally better than traditional salt‑cavern storage and far cheaper than pressurised tanks. By converting hydrogen into a stable liquid, LOHC sidesteps geological constraints and simplifies transport across borders. The model, calibrated on six years of meteorological data, suggests that a hybrid PV‑LOHC system in Spain and a wind‑LOHC system in Denmark can collectively supply up to 100 TWh of green hydrogen per year, positioning the corridor as a cornerstone of Europe’s clean‑energy supply chain.

Realising this vision will require coordinated policy frameworks, stable financing, and cross‑border regulatory alignment. The authors warn that uncertainties in capital expenditures, equipment lifespans, and storage costs could swing LCOH by more than 30 %, underscoring the need for long‑term support mechanisms. If replicated in other regions with complementary renewable profiles, similar corridors could accelerate the continent’s transition to a low‑carbon economy, attract private investment, and reduce Europe’s dependence on imported fossil fuels. The Spanish‑Danish model thus offers both a technical blueprint and a compelling business case for the next generation of renewable hydrogen infrastructure.