The A100 Alkaline Electrolyser from NEL ASA - modular 5 MW block for industrial green hydrogen

Reviewed: ad hoc news Bestseller & Flagship desk. Edited and checked on 2026-06-29, 18:31. Details in the imprint.

The A100 Alkaline Electrolyser from NEL ASA sits in a grey container, fans humming softly while gauges flicker as hydrogen production ramps up for another shift. Operators walk past in ear protection and hi-vis jackets, checking manifolds and valves with quick, practiced movements.

Where the A100 fits in

The A100 Alkaline Electrolyser is part of Nel's pressurised alkaline platform that targets multi-megawatt industrial installations needing continuous green hydrogen output. Nel highlights more than 3,500 electrolysers installed globally across alkaline and PEM systems, underscoring its installed base in demanding environments.

Under CEO Håkon Volldal, Nel is steering hard into scalable electrolyser manufacturing, including a 1 GW production line for next-generation pressurised alkaline systems at Herøya in Norway, planned to be fully ramped toward 2027. The A100 sits as a mid-sized building block for these larger projects.

What the A100 delivers

The A100 is designed as a roughly 5 MW pressurised alkaline module, intended to run for many thousands of hours with stable output and comparatively low maintenance in industrial conditions. In practice, that can mean several hundred kilograms of hydrogen per day per unit, depending on operating profile and efficiency.

Alkaline technology trades some compactness versus PEM for lower stack material costs at scale, which matters in multi-hundred-megawatt projects. Nel has communicated target system costs of under around 1,450 US dollars per kilowatt for 25 MW-scale alkaline installations in recent project guidance.

Design, footprint and feel

On site, the A100 presents as an industrial asset first, not a showroom piece. The housing is a container-style enclosure with cable trays, high-pressure piping and a tidy, clearly labeled control interface that technicians can read even with gloves on.

Project managers describe the startup sequence as more ritual than app tap: unlock the access door, listen for the low rumble of coolant pumps spinning up, then watch stack temperatures climb on a simple HMI before ramping hydrogen output in controlled steps.

Integration into large projects

Nel positions the A100 as a modular block that can be combined into 20 to 40 MW fields at customer sites, with shared balance-of-plant such as rectifiers, cooling and water treatment. Layout drawings show rows of identical units flanking central cabling corridors.

For grid-connected installations, the unit can be controlled to absorb surplus renewable power, acting as a flexible load that supports wind and solar integration. In some US projects, public utilities aim to use such electrolysers to stabilise hydropower output rather than ramp turbines up and down.

Maintenance, uptime and trade-offs

Pressurised alkaline systems like the A100 rely on proven chemistries, but they still demand disciplined maintenance schedules. Seal checks, electrolyte replacement and sensor calibration shape the daily routine of plant teams who live with the equipment.

Compared with PEM systems, alkaline stacks tend to operate at slightly lower current density and need more floor space per megawatt. In return, operators gain a platform that uses more conventional materials and can be attractive on total cost of ownership at high utilisation.

Market role and competition

Nel faces rivals from Europe, North America and Asia offering their own alkaline blocks in the 5 to 10 MW range. For procurement managers, that turns the A100 into one option in a tight shortlist where bankability, warranty terms and reference plants often decide.

Industry analysts see Nel's pivot after spinning off its hydrogen refuelling arm, now Cavendish Hydrogen, as a move that frees capital and focus for electrolysers such as the A100. That sharper profile can be a plus when large tenders demand long-term supply commitments and cost roadmaps.

How investors are watching it

For shareholders, the A100 is not a gadget but a revenue engine. Each signed contract for a multi-unit field adds visible backlog and shows whether Nel can compete on price and delivery in a market that is still subsidy-driven and project-based.

Overall, products like the A100 are central to how Nel positions itself as a scalable industrial supplier rather than a niche project developer, and investors track order intake here closely as a proxy for future cash flow.

Company context and share listing

Nel operates from Norway with manufacturing hubs including Herøya for alkaline systems and a US site focused on PEM, while selling into Europe, North America and selected Asian projects. The company now concentrates on electrolysers after divesting hydrogen refuelling stations into Cavendish Hydrogen.

For equity investors, NEL ASA shares (ISIN NO0010081235) are primarily listed on the Oslo Stock Exchange in Norwegian kroner, with various European trading venues also quoting the stock for cross-border investors.

This article was AI-assisted and editorially reviewed. Product information without guarantee; prices and availability may change at short notice. No investment advice, no buy or sell recommendation. Stock-market transactions involve risks up to total loss.