The UK electrolyser maker said the reservation for 30 of its 5MW Neptune containerised systems foresees call-offs by 2027 – when manufacturing could begin.

While it follows the ongoing delivery of 200MW of electrolysers to RWE’s 300MW GetH2 Nukleus project in Lingen, Germany, it remains unclear where the Neptune units could be destined.

RWE is currently several green hydrogen projects over 100MW across the UK, Netherlands, and Germany.

With supply for the GetH2 Nukleus project already secured, the Neptune units could be earmarked for other large-scale ventures such as the 100MW HyTechHafen project in the German port of Rostock in Germany or 300–500MW offshore H2opZee in the Netherlands.

“This additional 150MW capacity reservation underlines RWE’s confidence in our technology and delivery capability,” said ITM CEO Dennis Schulz.

The new reservation capacity comes after ITM posted record revenues and order backlog in its FY2025 results as it looked it shift its pipeline away from historic loss-making contracts.

The company ended the year with a contracted order backlog of £145.1m ($197m), up from £79.7m ($108.5m), with 60% comprising profitable contracts compared to a majority of loss-making legacy projects a year ago.