Why the Electrolysis Route Remains Expensive

Green hydrogen produced via PEM or alkaline electrolysis is, in energy accounting terms, a costly intermediate step: roughly 50–55 kWh of electricity are consumed per kilogram of H₂, and conversion losses accumulate again at the point of use. For road transport the arithmetic is unforgiving, which is why Transport & Environment and the ICCT consistently argue that grid electricity should flow directly to batteries rather than through an electrolyser. The counter-argument — that electrolytic hydrogen is irreplaceable in long-haul aviation, deep-sea shipping, heavy industry and the approximately 1.4 billion combustion vehicles already in service — is legitimate, but it does not dissolve the cost pressure.

That pressure redirects industrial attention toward supply chains where the hydrogen molecule does not originate from an electrolyser at all. Geological hydrogen, formed by serpentinisation of iron-rich rocks over geological time, emerges from the subsurface with no upstream electricity bill attached. The policy and investment question is whether it can be produced at sufficient scale and purity to feed the same downstream infrastructure that electrolytic hydrogen targets.

Lorraine, HY4Link and the Greater Region’s Geological Bet

The most advanced European data point remains the PTH-2 well in Lorraine, where a confirmed 49.6% H₂ concentration at 2,426 metres — the world’s deepest confirmed natural hydrogen well at 3,655 metres — was logged in June 2026 under the REGALOR II / FDE research programme. HY4Link, the ~230 km pipeline corridor being developed to connect French Grand Est industrial offtakers through Luxembourg to Belgian seaport import hubs by 2031, is explicitly designed to integrate natural-hydrogen flows from Lorraine geology, reducing the project’s dependence on imported electrolytic H₂. AI-assisted seismic interpretation and geological modelling are being applied along the corridor to map subsurface structures capable of hosting or routing geological hydrogen — a methodology also visible in MAX Power’s AI-guided MAXX LEMI platform, which is directing the current Bracken prospect drilling campaign in Saskatchewan.

Belgium’s BE.Hydrogen programme, launched in March 2026, remains a geological survey: no natural hydrogen accumulation or commercially exploitable resource has been confirmed on Belgian territory, and the programme should not be read as a discovery announcement. Its value lies in establishing whether the stratigraphy beneath Belgium is analogous to the productive formations already characterised in Lorraine.

What This Means for Industrial Project Teams

For engineers and procurement officers building the business case for hydrogen offtake, the distinction between electrolytic and geological supply matters enormously at the levelised-cost level. Electrolytic green hydrogen’s cost per kilogram is directly correlated to the electricity price and electrolyser capital expenditure — both volatile inputs. Geological hydrogen, if flow rates and purity can be demonstrated at commercial scale, carries a fundamentally different cost structure dominated by drilling, surface conditioning and transport. The Canada PNAS study on serpentinisation-sourced hydrogen reinforces the view that this is a global phenomenon, not a Lorraine anomaly.

The honest caveat is that geological hydrogen production remains pre-commercial: no project in Europe has yet moved from confirmed subsurface concentration to sustained wellhead offtake. Until that step is taken, electrolytic green hydrogen — for all its efficiency disadvantages — remains the only certified, bankable supply chain available to industrial buyers operating under RED III and ReFuelEU frameworks.

Sources

• Horse Powertrain presents methanol range extender — electrive.com
• White Hydrogen Discovery in Canada Reveals Massive Underground Energy Potential

Featured image via Unsplash.