Topsoe to Build World’s Largest SOEC Electrolyser Production Facility; 500 MW scalable up to 5 GW; focus on Power-to-X


Topsoe intends to build the world’s largest and most advanced industrial-scale electrolyser production facility. The plant will produce high-temperature solid oxide electrolyser (SOEC) cells, which have higher energy efficiency than competing technologies.

The new electrolyzer production plant, to be built in Herning, Denmark, will be operational by 2024 and will have an annual capacity of 500 MW with scalability up to 5 GW, making it one of the first factories of this type on an industrial scale. Construction is expected to begin in the second half of this year, subject to Council and other regulatory approvals.

The Topsoe SOEC electrolyser is a compact battery constructed primarily from abundant and inexpensive ceramic materials enclosed in a metal casing. To produce hydrogen, it uses electricity to split water molecules (H2O) to hydrogen (H2) and oxygen (O2). This is accomplished by three components: an anode, a cathode and an electrolyte. The cathode splits the water molecules, by reduction, into hydrogen and oxide ions, after which the oxide ions are transported through the electrolyte to the anode and oxidized to oxygen.

The high degree of automation and self-response capability of the high temperature SOEC unit, across the entire hydrogen process, minimizes monitoring and training requirements, as well as associated risks, for a production and efficient and convenient on-site hydrogen supply.

Topsoe’s ambition is to rapidly accelerate the adoption of green solutions, particularly within Power-to-X.

We are willing and able to support society’s green ambitions and the need to accelerate the energy transition, and we have the technology to do so. With our new electrolyser production plant, we are leading the way in accelerating utility-scale Power-to-X solutions, and we do this with our highly innovative technology that surpasses technologies currently on the market.

—Roeland Baan, CEO of Topsoe

Topsoe is already seeing considerable interest in Power-to-X solutions and is in advanced discussions with a number of potential partners on future off-take agreements and electrolyser plant capacity reserve commitments.

The development of a strong Power-to-X industry in Europe will also strengthen the EU’s ambitions to be independent of energy imports from other regions. The decisive step to ensure the large-scale availability of electrolyzers for Power-to-X solutions takes place together with Ursula von der Leyen, President of the European Commission, and the Heads of State of Denmark, Germany, the Netherlands and Belgium have signed an agreement, in which the parties agree to invest in a tenfold increase in offshore wind capacity by 2050.

The political agreement ensures significant availability of the renewable energy needed to power future Power-to-X installations in the EU.

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