Every offshore wind target around the Baltic Sea eventually runs into the same question: where does the electricity go once the grid is full? One answer being pursued from the Gulf of Bothnia to southern Denmark is to convert part of it into hydrogen and move the molecules by pipe. This explainer lays out the pieces of that map as they stand – a planned subsea collector, a commercial corridor being built before the steel, and the electrolyser projects that would feed them.
The collector: a pipeline under the Baltic
The most ambitious piece is the Baltic Sea Hydrogen Collector (BHC), a large-scale offshore hydrogen pipeline that gas transmission operators Gasgrid Finland and Nordion Energi are studying with the developers OX2 and Copenhagen Infrastructure Partners. The concept would link Finland, Sweden, the Åland Islands and Germany, with possible branches to energy islands such as Gotland and Bornholm, and the partners have talked about 2030 as the target horizon. Their pitch is that the Baltic basin could supply up to 55 per cent of the clean-hydrogen volume foreseen in the EU’s REPowerEU plan, and that producers and industrial buyers will only invest once a guaranteed route from supply to demand exists.
The BHC sits inside the European Hydrogen Backbone, a network vision drawn up by 31 gas infrastructure companies, and leans on the 2022 Marienborg Declaration, in which the eight Baltic coastal states set a joint offshore wind ambition of at least 19.6 GW by 2030 and recognised a potential of up to 93 GW. The project is still at the study stage; whether the economics hold is precisely what that stage is meant to establish.
The corridor: matching buyers and sellers first
The BHC team has been explicit that a pipeline is not built by infrastructure companies alone. Its first networking event in Helsinki, organised with the project supporters SEFE and VERBUND, put Finnish and Baltic hydrogen producers in the same room as Central European midstream companies in a speed-dating format: project status, realistic timelines, key uncertainties, and the signals each side needs before taking the next step. Gasgrid chief executive Olli Sipilä, Business Finland’s Markku Kivistö and Tesi’s Antti Ritala gave short inputs, and H2Global ran a workshop on its pipeline concept.
The logic is a response to a familiar stand-off. Producers will not sign for electrolysers without offtake, buyers will not commit without supply, and neither will move without transport. The corridor work tries to make the commercial connection before the physical one, so that when a final investment decision on the pipe comes up, the volumes on both ends are already sketched in.
The projects: where the molecules would come from
On the supply side, the largest single commitment so far is in Finland. Vetyalfa’s Cloudberry project won EUR 224 million from the EU Innovation Fund’s hydrogen auction, the biggest grant Finland has ever drawn from the fund. Vetyalfa bid the lowest price of any participant while pledging the largest volume: close to 509,000 tonnes of hydrogen over ten years from 500 MW of electrolysis, avoiding more than 3.38 million tonnes of emissions. It was one of nine projects selected across seven countries, together worth almost 1.1 GW of electrolyser capacity and roughly EUR 1.09 billion in support; the auction was oversubscribed more than sixfold. Grant agreements are due in the final quarter of 2026, after which the winners have two and a half years to reach an investment decision and five to start operating.
At the southern end of the map, ENGIE and European Energy are developing up to 150 MW of electrolysis in Aabenraa Municipality, Denmark, next to the Kassø e-methanol plant that European Energy operates with Mitsui. The plant is intended to feed the planned Danish-German Hydrogen Backbone and to serve industrial and mobility demand in Germany; it was selected in Germany’s auction under the European Hydrogen Bank, and ENGIE has reserved marketing rights to more than 20,000 tonnes a year. Operations are targeted for around 2030.
How the pieces fit – and what is missing
Read together, the projects describe a supply chain in outline. Wind-rich Finland and Sweden produce; a Helsinki-anchored corridor lines up buyers; the Danish-German border already has a pipeline plan and an e-fuel cluster to plug into; and the collector would eventually stitch the northern and southern ends together under the sea. Each element has a different level of maturity: Cloudberry has money on the table, the Aabenraa project has a partner and an auction award, the Danish-German link has a route, and the BHC has a study.
The gaps are equally clear. None of the offshore pipeline capacity exists yet, the electrolyser projects depend on cheap and abundant power that the Baltic’s offshore build-out has still to deliver at scale, and every one of the funding mechanisms cited – the Innovation Fund, the Hydrogen Bank – is competitive rather than guaranteed. The next milestones to watch are the Innovation Fund grant signatures at the end of 2026, the investment decision windows that follow, and whether the BHC partners move from study to a concrete routing and financing proposal. Until then, the Baltic hydrogen map is a plan with a few well-funded dots on it, not yet a network.
