EKPO Brings Its Next-Stage NM20 Fuel Cell Stack to IAA

EKPO Fuel Cell Technologies, the joint venture between ElringKlinger and OPmobility, will show the next stage of development of its NM20 fuel cell stack at IAA Transportation 2026, with the stated aim of advancing the industrialisation of hydrogen powertrains for heavy-duty vehicles.

EKPO Fuel Cell Technologies is taking the next stage of development of its NM20 fuel cell stack to IAA Transportation 2026, the commercial vehicle show that has become the annual checkpoint for anyone trying to work out whether hydrogen still has a role in long-haul freight. The company, a joint venture between German sealing and powertrain supplier ElringKlinger and French automotive supplier OPmobility, frames the update around industrialisation: taking a stack that already exists as a product and making it buildable at volume, for heavy-duty applications, at a cost a truck maker can live with.

That word — industrialisation — is the whole story. Fuel cell stacks have not been the bottleneck in hydrogen trucking for several years. Demonstration fleets run. Prototype tractors have crossed Europe. What has not arrived is the combination of a stack cheap enough to buy in quantity, hydrogen cheap enough to put in the tank, and enough places to put it in the tank. EKPO's announcement addresses the first of those three, and only the first.

What a stack supplier actually sells

A fuel cell stack is the core of a hydrogen powertrain: a compressed assembly of individual cells, each pairing a membrane electrode assembly with a bipolar plate, that converts hydrogen and air into electricity and water. Around it sits the rest of the system — air compressor, humidifier, cooling loop, hydrogen tanks, DC-DC converter, battery buffer, controls. EKPO's business is the stack and stack modules, not the finished truck, which means its customers are vehicle integrators and system houses rather than fleets.

That position has a specific commercial logic. A stack supplier can sell into trucks, buses, off-highway machines, rail and marine applications from broadly the same product family, spreading tooling and qualification costs across several end markets that individually would not justify a line. It also means the supplier's revenue depends entirely on someone else's decision to build a vehicle programme — a dependency that has made 2025 and 2026 uncomfortable for the whole hydrogen mobility supply chain as European truck makers rebalanced capital toward battery-electric platforms with clearer near-term demand.

Presenting a further-developed NM20 at IAA Transportation, as electrive reported, is therefore aimed at a narrow but decisive audience: the engineering and purchasing teams who will either specify a stack for a series programme in the second half of this decade or will not.

Two parents with two different exposures

EKPO's structure is worth reading carefully, because it tells you how much risk each side is carrying. ElringKlinger brought the metallic bipolar plate and stack expertise it had built up over years of internal development; OPmobility, formerly Plastic Omnium, brought hydrogen storage, systems integration and a broader global customer footprint. Neither parent is a hydrogen pure-play. Both run large legacy businesses supplying conventional and electrified vehicles, which is precisely why the joint venture exists — it concentrates the hydrogen spend in one vehicle rather than duplicating it in two corporate R&D budgets, and it shares the downside if heavy-duty hydrogen adoption arrives later than the mid-2020s forecasts assumed.

For investors in either parent, a product-stage announcement like this one is not a revenue event. It is evidence about whether the venture is still being funded and developed at pace, or being quietly parked. A next-generation stack shown at the industry's main commercial vehicle event is evidence of the former. What it does not disclose is order intake, pricing, or any customer commitment, and nothing in the announcement should be read as such.

The freight economics that decide the outcome

Hydrogen trucking competes against two incumbents. Diesel remains the operational default across European and North American long-haul freight, and its cost per kilometre is well understood by every fleet controller. Battery-electric tractors have moved from pilot to order book, pulled along by megawatt charging standards and by the fact that electricity is already distributed everywhere. Hydrogen's pitch has always rested on payload, refuelling time and range on the heaviest, longest duty cycles — the cases where a battery big enough to do the job starts eating the load.

That pitch survives on paper. What has repeatedly failed in practice is the cost of the fuel at the nozzle and the sparseness of the network. A stack improvement helps the first of those indirectly: a more efficient stack consumes less hydrogen per kilometre, which lowers the operating cost for a given hydrogen price, and a cheaper stack lowers the purchase price the fleet has to amortise. Neither effect changes what green hydrogen costs to produce, compress and deliver. Fleets buying total cost of ownership, not technology, will keep waiting for that number.

What to watch after the show floor clears

Three things would turn this from a product update into a business inflection. First, a named series-production nomination from a heavy-duty OEM with a start-of-production date — that is the single data point the stack industry has been short of. Second, evidence of unit cost coming down through design rather than subsidy, typically visible in cell count, plate manufacturing method and platinum loading. Third, continued capital commitment from both parents in their own disclosures; a joint venture where one side stops writing cheques tends to announce products for a while before it announces anything else.

The macro backdrop at least is not hostile to industrial capital. As of the last trade at 16:35 GMT on 16 September 2026, the S&P 500 tracker (NYSEARCA: SPY) stood at $759.74, up 0.31% on the day from a previous close of $757.39, while the Nasdaq 100 fund (NASDAQ: QQQ) was at $709.94, up 0.77%, and the Dow 30 vehicle (NYSEARCA: DIA) was marginally lower at $520.94, down 0.06%. Risk appetite for long-dated industrial technology is a function of rates and growth expectations, and equities were holding their ground on the day EKPO made its announcement.

None of that decides hydrogen trucking. The decision sits with a handful of European and Asian truck makers, the national hydrogen refuelling build-outs that keep slipping, and the spread between diesel, electricity and delivered hydrogen. EKPO's contribution is to make sure that, if and when those pieces line up, a mature, manufacturable stack is on the shelf rather than still in a lab. That is a defensible strategy for a supplier. It is also, by construction, a waiting game.

Key facts

• Product: NM20 fuel cell stack, next stage of development
• Venue: IAA Transportation 2026
• Ownership: Joint venture of ElringKlinger and OPmobility
• Market backdrop: S&P 500 (SPY) $759.74, +0.31%, as of 16:35 GMT, 16 Sep 2026

Frequently asked questions

What is the EKPO NM20?

The NM20 is a fuel cell stack developed by EKPO Fuel Cell Technologies for heavy-duty applications. A stack is the core component of a hydrogen powertrain, converting hydrogen and air into electricity and water. EKPO is presenting the next stage of the NM20's development at IAA Transportation 2026, with the stated goal of advancing industrialisation of hydrogen-based powertrains.

Who owns EKPO Fuel Cell Technologies?

EKPO is a joint venture between ElringKlinger, the German sealing and powertrain supplier, and OPmobility, the French automotive supplier formerly known as Plastic Omnium. The structure concentrates hydrogen development spending in a single entity rather than duplicating it across two corporate research budgets, and shares the risk if heavy-duty hydrogen adoption arrives later than forecast.

Does a new stack make hydrogen trucks cost-competitive?

Not on its own. A more efficient stack reduces hydrogen consumed per kilometre and a cheaper stack lowers the vehicle purchase price a fleet must amortise. But the dominant obstacles to hydrogen trucking remain the delivered cost of hydrogen at the nozzle and the thinness of refuelling networks, neither of which a stack supplier controls.

Who are EKPO's customers?

EKPO sells stacks and stack modules to vehicle integrators and system houses rather than to fleets directly. That means its revenue depends on another company's decision to launch a vehicle programme. The same product family can address trucks, buses, off-highway machinery, rail and marine applications, spreading tooling and qualification costs across several end markets.

Why does hydrogen still appeal for heavy-duty freight?

The argument rests on payload, refuelling time and range on the heaviest and longest duty cycles, where a battery large enough for the job starts consuming usable load capacity. Battery-electric tractors have moved faster commercially because electricity is already distributed everywhere, while hydrogen refuelling build-outs have repeatedly slipped.

What would signal real commercial momentum for EKPO?

A named series-production nomination from a heavy-duty vehicle maker with a start-of-production date would be the clearest signal, since the stack industry has been short of exactly that. Evidence of unit cost falling through design rather than subsidy, and continued capital commitment disclosed by both parent companies, would also matter.

Sources

• EKPO unveils next-gen fuel cell stack — electrive

Photo: Efrem Efre · Pexels Licence — source