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European Energy Markets
22MAY

Stegra finishes 740 MW Boden electrolyser

3 min read
10:26UTC

Stegra completed installation of all 37 electrolyser modules at Boden, Sweden, totalling 740 MW supplied by thyssenkrupp nucera; pre-commissioning underway, with production targeted for 2026.

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Key takeaway

Europe's largest electrolyser stack feeds Swedish green steel, not the H2-ready German gas fleet.

Stegra completed installation of all 37 electrolyser modules at its Boden green hydrogen facility in northern Sweden, taking total capacity to 740 MW (37 modules at 20 MW each), supplied by thyssenkrupp nucera 1. Pre-commissioning is underway and production is targeted for 2026. The Boden facility is the largest electrolyser plant in Europe and feeds green hydrogen to Stegra's adjacent green steel plant rather than the grid; output sits inside an integrated chemistry that links electricity, hydrogen and decarbonised iron in a single industrial complex.

The physical-capacity counterpart sits in Germany. Reiche confirmed the 12 GW H2-ready gas tender with the European Commission on 14 May , and the German cabinet approved the gas plant auction law with a first 9 GW tender set for 8 September 2026 and all units online by 2031. Where the Reiche programme builds H2-ready demand for green hydrogen across the German thermal stack, Stegra builds green hydrogen supply via the largest electrolyser stack in Europe. The two sides of the trade arrived in the same fortnight at the same scale.

H2 transport infrastructure breaks the symmetry. Sweden has limited pipeline export capacity for hydrogen, the SE1 bidding zone runs at low power prices (Stegra's economic case relies on Swedish hydroelectric and wind oversupply), and at scale the green-steel pull will absorb most of the 740 MW output domestically. For desks watching the clean spark spread argument, Boden's hydrogen does not feed German CCGT carbon-cost relief in 2026; it feeds Swedish green-steel offtake. The H2-ready demand built by Reiche's September tender will need German or Norwegian electrolyser supply rather than Boden molecules to close the loop.

Deep Analysis

In plain English

Stegra has finished installing the largest set of electrolysers in Europe at its factory in Boden, northern Sweden. Electrolysers split water into hydrogen and oxygen using electricity; the hydrogen is then used to make steel without burning coal, producing a much lower carbon footprint. The 740 megawatt system was supplied by the German company thyssenkrupp nucera across 37 individual units. Pre-commissioning of all 37 units is now underway, with Stegra targeting a 2026 production start. The Boden project demonstrates that electricity-to-hydrogen at 740 MW industrial scale is technically achievable; its economics, however, rest on Swedish SE1 zone hydroelectric power at implied prices of EUR 25-35/MWh, a cost advantage not available to equivalent projects in Germany, France or the Netherlands.

Sources:Stegra
Mentions:Sweden →Finland →Netherlands →Germany →CCGT →European Commission →Ember →France →TTF →ReArm Europe →Katherina Reiche →Stegra →thyssenkrupp nucera →Boden →
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Update #11 · Germany cannot inject at this price

Stegra· 22 May 2026
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