The Nel Atmospheric Alkaline Electrolyser A-Series. Modular hydrogen production for industrial users
Published on 07/26/2026 at 12:24 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS
The Nel Atmospheric Alkaline Electrolyser A-Series sits in a stark white container, humming softly as cooling fans push warm air out into the yard of an industrial site. A technician, Kari Haug, runs her hand along the metal housing, checking for vibration while watching hydrogen output on a tablet.
Modular alkaline hydrogen blocks
Nel ASA positions the Atmospheric Alkaline Electrolyser A-Series as a modular building block for on-site hydrogen production at industrial facilities and fueling stations. Each unit is based on proven alkaline technology that splits water into hydrogen and oxygen using potassium hydroxide as electrolyte.
The A-Series portfolio spans from the compact A-60, delivering around 120 Nm³ of hydrogen per hour, up to larger configurations capable of roughly 485 Nm³/h, enough to support multiple fueling dispensers or a small industrial cluster. The core idea, explains Nel CEO Håkon Volldal, is that operators can scale capacity by adding standardised modules rather than redesigning a plant from scratch.
Nel ASA and its hydrogen portfolio
Background figures, order intake and project news on NEL ASA can be found in our stock topic section and on the company’s own investor relations page.
Key specs and operating window
On Nel’s product page, the A-Series is described as an atmospheric-pressure electrolyser designed for continuous 24/7 operation, with a typical operating temperature range between roughly 60 and 80 °C inside the stack. The system uses industrial-grade water that is purified in an integrated treatment unit before entering the cells, avoiding damage from minerals or organics.
Output pressure is usually around 2 to 30 bar, depending on configuration and downstream compression, which makes the gas suitable for feeding compressors, storage tanks or direct pipeline injection. A single A-60 skid occupies only a few square metres of floor space, with containerised options for outdoor installation where space is tight. Power consumption per kilogram of hydrogen is in the mid-50 kWh range, reflecting the efficiency profile of modern alkaline systems.
Use cases: from industry to fueling
Nel markets the A-Series into several segments: small industrial users that previously relied on delivered bottled gas, green ammonia or methanol pilots, and early-stage hydrogen refueling stations where traffic volumes are still modest. For such customers, on-site production can cut logistics costs and give more control over supply interruptions.
One example is a Scandinavian chemical plant that replaced cylinder deliveries with an A-Series electrolyser tied to a renewable power contract, according to a case study cited by trade journal Hydrogen Insight. Plant engineer Morten Lund reported more stable hydrogen purity and fewer truck movements on site, with local noise limited to a steady mechanical whirr from pumps and fans.
Integration with renewables
Because the A-Series runs on electricity, its carbon footprint depends on the power mix. Nel emphasises pairing the units with wind or solar farms, highlighting projects where electrolysers ramp up and down in line with the output of nearby turbines. That flexibility is not absolute; alkaline stacks prefer reasonably stable operating windows to preserve lifetime.
In practice, operators often combine the plant with buffer storage for hydrogen and occasionally with battery systems for smoothing power input, according to engineering notes from energy consultant DNV. As a result, the site layout usually includes the white electrolyser container, grey storage vessels, and sometimes a row of inverters and control cabinets, producing a quiet hum rather than the roar associated with traditional steam reformers.
Competition and positioning
Nel’s A-Series competes with alkaline offerings from other manufacturers and increasingly with PEM (proton exchange membrane) electrolysers. PEM units can respond faster to fluctuating power and are often favoured in grid-balancing projects, but alkaline systems remain attractive on cost and maturity, especially for steady industrial baseload applications.
Volldal has argued in several interviews that a balanced portfolio is needed: robust alkaline for large, cost-sensitive installations and PEM for dynamic, high-pressure needs. The A-Series sits on the alkaline side of that spectrum, where durability and capex per installed kilowatt are critical selling points for conservative industrial buyers.
Why this matters for Nel ASA stock
For retail investors, the Atmospheric Alkaline Electrolyser A-Series is not a flashy consumer gadget but a workhorse product line that can quietly underpin future revenue. Orders for such electrolysers show up in Nel’s backlog, which the company reports quarterly, offering clues on how strongly industrial adoption of green hydrogen is progressing. The NEL ASA share (ISIN NO0010081235) trades on the Oslo Stock Exchange in Norwegian kroner and tends to react to large contract announcements and policy news in the hydrogen space.
Nel Atmospheric Alkaline Electrolyser A-Series facts
- Product: Nel Atmospheric Alkaline Electrolyser A-Series
- Manufacturer: NEL ASA
- Category: Classic / Longseller industrial hydrogen equipment
- Market launch: Around the early 2010s, expanded with current A-Series configurations over the following years
- MSRP / Price: Project-specific, typically in the low to mid million-euro range per installed system, depending on capacity and integration
- Availability: Available globally via Nel’s hydrogen division, subject to project development and permitting
- Target group: Industrial gas users, chemical plants, pilot green fuels projects, and early-stage hydrogen refueling stations
- Highlight / USP: Modular alkaline electrolyser line offering scalable on-site hydrogen from roughly 120 to 485 Nm³/h per unit
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