The Nel A-Series electrolysers - NEL ASA bets on scalable green hydrogen

Nel A-Series electrolysers deliver up to 4.7 MW per unit for industrial green hydrogen projects. This product line is driving the price of NEL ASA stock (ISIN NO0010081235).

Nel A-Series electrolysers sit behind a chain-link fence on an industrial lot, grey containers humming softly as cooling fans push out warm air and the smell of fresh paint hangs in the drizzle. These turnkey units are Nel’s workhorse for on-site green hydrogen.

Containerised PEM system for industry

Nel A-Series is a range of standardized, containerised alkaline electrolysers designed for industrial hydrogen production from renewable power sources. Each unit arrives in a steel enclosure that looks and feels like a heavy 40-foot shipping container, with cable glands and pipe flanges lined up in tight rows along one side.

According to product manager Lars Erik Nyberg, the A-Series was built to slot into large-scale projects with minimal custom engineering, from fertiliser plants to refineries. A typical configuration includes power electronics, gas treatment and control systems, so project developers mainly handle grid connection and civil works. The result is a tactile, plug-in industrial box rather than a patchwork of separate skids.

Power range and modular scaling

The A-Series portfolio spans from smaller A-90 type units up to configurations that reach around 4.7 MW per container, with hydrogen output roughly in the one-ton-per-day class depending on operating conditions. Developers can line up multiple A-Series containers on a concrete pad, connecting them in parallel to scale projects to tens of megawatts using repeatable building blocks.

Nel highlights that A-Series systems operate at a nominal pressure of 30 bar, which cuts the need for additional compression stages for many downstream uses, from pipeline injection to industrial burners. At the control room HMI, operators see pressure, stack current and hydrogen purity as digital bars and numbers, but on-site technicians also hear the hiss of valves and feel the subtle vibration through the floor when the stacks ramp from standby to full load.

Efficiency, footprint and grid integration

On efficiency, Nel describes the A-Series as reaching specific energy consumption down towards the mid- to high-40 kWh per kilogram of hydrogen, depending on configuration and operating point. That figure matters directly for renewable power projects, where every kilowatt-hour has a cost and a carbon footprint attached. The more electricity it takes to produce each kilogram, the less competitive the hydrogen.

The container format keeps the footprint compact: a single A-Series installation typically fits within a few hundred square meters, including access routes and safety clearances. Inside, the electrolyser stacks sit behind metal panels with warning labels and yellow earthing strips, while the balance-of-plant equipment – pumps, de-gassers, rectifiers – forms a dense, almost labyrinthine walk-through corridor.

Safety features and operating concept

Safety is a central selling point, and chief technology officer Bjørn Simonsen has repeatedly stressed that Nel designs A-Series systems according to European and international standards for pressure equipment and hazardous areas. Fire detection, gas leak sensors and controlled ventilation are integrated into the container, with interlocks that shut down the electrolyser stacks if alarms are triggered.

Operators run the A-Series mainly through a supervisory control and data acquisition (SCADA) interface that supports remote monitoring and integration into site-wide control systems. That means a dispatcher sitting in a separate building can adjust setpoints, watch load curves and read maintenance logs without walking through the humming equipment room – an important factor for projects in harsh climates or locked-down environments.

Use cases from ammonia to mobility

Nel markets A-Series electrolysers for a broad range of uses: hydrogen feedstock for ammonia and methanol, refinery desulfurisation, steel processing, and as a source for mobility applications like bus depots and truck corridors. In heavy industry, hydrogen replaces grey hydrogen from fossil fuels, while in transport it can be compressed or liquefied for fuel-cell vehicles.

One reference project is the A-Series deployment at the Iberdrola green hydrogen plant in Puertollano, Spain, where Nel supplies electrolysers to feed a fertiliser plant with renewable hydrogen. Walk across the site and the impression is closer to a classic industrial complex than a lab: dust in the air, trucks rumbling past, with the electrolyser containers nested between storage tanks and process units.

Competition and technology position

In the wider electrolyser market, A-Series competes with alkaline solutions from Thyssenkrupp Nucera, Cummins and Chinese suppliers, as well as PEM systems from manufacturers like ITM Power and Plug Power. Alkaline technology remains attractive for established chemical processes due to its maturity and typically lower capex.

Nel positions A-Series as a proven, bankable choice for large plants, while its newer M-Series PEM range targets mobility and projects that value fast load changes. This split allows customers to choose between the more rugged, time-tested alkaline approach and the dynamic performance of PEM, depending on grid conditions and hydrogen use profiles.

Manufacturing in Norway

The A-Series electrolysers are manufactured at Nel’s facility in Herøya, Norway, part of a production complex that the company has expanded in stages to meet growing demand. The plant uses automated stack assembly lines and standardized module build-up to keep unit costs under control, with workers moving between stations where robot arms and manual tools sit side by side.

According to CEO Håkon Volldal, Nel aims to lift nameplate capacity to around 4 GW of electrolysers annually in the medium term, across its alkaline and PEM lines. That scaling plan is closely watched by project developers, since multi-gigawatt orders require confidence not just in technology but also in timely delivery and long-term service availability.

Pricing and contracts

Nel does not publish a list price for A-Series units, as they are typically sold under project-specific contracts that bundle engineering, installation and sometimes service agreements. Industry estimates put the cost of large alkaline electrolyser systems in the several hundred euros per kilowatt range, with wide bandwidth depending on scale, location and buyer bargaining power.

Customers often secure long-term hydrogen offtake agreements backed by industrial counterparties or public support schemes, with the A-Series forming the core capex line in the electrolysis segment of those projects. That means each signing shows up in Nel’s order backlog and eventually in revenue, making A-Series a financial as well as technical pillar for the company.

Regulation and certification

Projects using A-Series electrolysers must navigate local regulatory frameworks, from building permits to environmental approvals and grid connection rules. Nel supports developers with documentation on safety, performance and standards compliance, which is essential for banks and insurers in due diligence processes.

European projects increasingly seek certification under emerging schemes for renewable hydrogen, such as those tied to the EU’s Renewable Energy Directive and the delegated acts on green hydrogen. The technical data of A-Series – efficiency, operating hours, load following behaviour – feed into those calculations, ultimately determining whether the resulting hydrogen qualifies for incentives or quotas.

Impact on NEL ASA stock

For NEL ASA, the A-Series portfolio is one of the main revenue drivers in the Electrolyser division, alongside newer platforms and technology development. Analysts tracking the NEL ASA share on Oslo Børs regularly reference large A-Series orders when discussing backlog, margins and capital spending, as these projects can stretch over several years from signing to commissioning and service.

Key facts on Nel A-Series electrolysers

• Product: Nel A-Series electrolysers
• Manufacturer: NEL ASA
• Category: Software/Service/Subscription (industrial hydrogen systems)
• Market launch: First commercial A-Series units introduced in the mid-2010s, with ongoing platform updates.
• MSRP / Price: Project-specific pricing, typically in the several hundred EUR per kW range for large alkaline systems.
• Availability: Available globally through Nel’s project and sales network, with manufacturing at Herøya, Norway.
• Target group: Industrial companies, energy utilities, project developers and infrastructure funds planning large-scale green hydrogen plants.
• Highlight / USP: Standardised, containerised alkaline electrolysers up to around 4.7 MW per unit, designed for modular scaling in multi-megawatt green hydrogen projects.