How EVOLOH identified the real barriers to viable electrolytic hydrogen and built an innovative solution to address them 

Executive Summary 

For years, the electrolytic hydrogen industry has operated under the assumption that commercial viability will be achieved through cheaper electrolyzer hardware. Drive down the cost of the stack, the thinking goes, and the economics will follow. Billions of dollars in R&D and manufacturing investment have been deployed in pursuit of this goal.  

This assumption is not wrong, but it is incomplete. Even with free electrolysis plants, the levelized cost of hydrogen (LCOH) would still be too high. Why? Because the cost of electricity from the grid is so high. And connecting to the grid is not only costly but also very slow.  

In the Netherlands, for example, grid connection charges alone amount to roughly $3 per kilogram of hydrogen produced. When you add stack CAPEX and electricity costs, the total LCOH reaches $8-9/kg. The commercially viable target is $1-2/kg. Reducing the cost of the stack cannot close this gap. Stack cost is only one of several structural barriers standing between green hydrogen and commercial viability.  

EVOLOH was founded to solve this problem. By systematically addressing every structural cost driver, we have driven LCOH well below $2/kg, making green hydrogen competitive with conventional production methods without subsidies or policy incentives. 

Stack design innovations reduce the cost of direct materials by more than 5x. Manufacturing innovations reduce the cost of a factory by more than 4x. Behind-the-meter operational flexibility reduces the effective cost of electricity by ~50% 

The Real Problem With Electrolytic Hydrogen 

The industry’s focus on reducing hardware costs is understandable. Electrolyzers are expensive, and cheaper stacks should mean cheaper hydrogen. But making cheaper electrolyzers is only one part of the problem. The real problem is a combination of interrelated barriers across project derisking, scalability, and project finance.  

Project Derisking 

Technology: Performance, Durability, and Operability 

Most electrolyzer manufacturers offer limited performance guarantees and warranty coverage. But stacks pushed to their operational limits — as high current density designs typically are — often degrade faster than projected, increasing lifetime costs and the probability that a project underperforms its financial model. The result is technology risk that lenders and offtakers price heavily into project terms, raising the effective cost of capital. 

Manufacturing, Scalability, and Operational Flexibility 

Large alkaline water electrolysis (AWE) stacks — the most prevalent incumbent technology — create compounding manufacturing and operational constraints. A single stack can weigh 60 tons, requiring rail transport, heavy cranes, and 30-meter factory ceilings just to build and move them. The factories capable of producing them can cost in the hundreds of millions of dollars and are nearly impossible to scale quickly. And a single large electrolysis project can consume a manufacturer’s output for years. 

Thyssenkrupp nucera’s experience after winning the NEOM Green Hydrogen Company (NGHC) contract in Saudi Arabia illustrates the problem. To supply the stacks for the project’s 2.2 GW electrolyzer capacity, ThyssenKrupp ran their factory at full capacity for two to three years. Unable to take on other customers during this time, their revenues fell sharply when the project concluded. This kind of supply chain cannot serve multiple large projects simultaneously. 

Operational flexibility is equally constrained. Most electrolyzers, whether proton exchange membrane (PEM) or AWE, need continuous power. When renewable output fluctuates, systems cannot ramp down and back up fast enough, requiring costly battery storage as a buffer and power electronics. In the case of AWE, physical inertia prevents rapid response, just as a train cannot brake as quickly as a sedan. EVOLOH’s stacks are a fraction of that size and mass, enabling near-instantaneous load-following. 

Repeatability, Supply Timelines, and Cost-Down Potential 

The same manufacturing constraints that prevent supply to multiple projects simultaneously also limit the cost-down trajectory of incumbent technologies. Factories that require massive capital investment and specialized infrastructure cannot be replicated cheaply or quickly.  

Cost reduction depends on volume, and volume is constrained by the capacity of facilities that take years and hundreds of millions of dollars to build. EVOLOH’s light-industrial manufacturing model breaks this dependency entirely: our factory footprint is approximately one-fifth the size and cost of a comparable AWE manufacturer’s and can be replicated virtually anywhere in the world. 

Project Finance 

Bankability and the Need for Scale 

Green hydrogen projects are almost always too large for balance-sheet financing. They require project finance — capital raised against the project’s own projected cash flows. For this, the project needs expert confirmation that the electrolyzer manufacturer can reliably supply enough units to complete the project on schedule. EVOLOH’s scalable manufacturing model — with the ability to add capacity faster than others can obtain permits for a new building — is designed to meet this requirement. 

Offtake and the Need for Backup 

Project finance also requires a creditworthy long-term offtaker. Industrial customers such as steel, ammonia, and refining, need supply continuity. If the hydrogen plant goes down, their process may stop too. Because of this, they need backup supply guarantees.  

With large alkaline stacks, providing that backup is prohibitively complex and expensive: building in redundant capacity greatly increases the procurement timeline and cost. Once installed, the stacks cannot be moved, require full factory-grade refurbishment every ten years, and take weeks or months to service.  

EVOLOH takes a fundamentally different approach. Stack replacement takes hours rather than days or weeks, keeping downtime to a minimum and maintenance costs low. We further de-risk operations through an insurance-backed long-term service agreement (LTSA) that includes periodic maintenance, performance-based stack replacements, and remote monitoring and diagnostics (RM&D). RM&D identifies potential issues before they impact operations, enabling preventative maintenance and extending stack life. 

FID and the Need for Speed 

From the moment of final investment decision (FID), capital is committed and costs are accumulated before a single kilogram of hydrogen is produced. The faster a project reaches full production, the better its financial returns. 

With incumbent technology, the gap from FID to startup can stretch one to three years. Because EVOLOH’s manufacturing model can be scaled rapidly and replicated anywhere, projects can move from FID to full production significantly faster, reducing the period between committed capital and first revenue. 

Conventional Approaches Aren’t Solutions to the Real Problem 

Electrolyzer manufacturers have pursued three primary strategies to reduce LCOH. Each addresses a narrow slice of the cost problem while introducing new risks, and none of them touches the structural barriers described above. 

Conventional Approach 1: High Current Density Reduces Material Costs 

Durability Issues: A Minor Decrease in LCOH, Higher Project Risk 

Running stacks at a higher current density reduces the necessary electrode area which in turn will reduce upfront material cost — a real but modest LCOH improvement. The trade-off is durability: higher current density accelerates stack degradation, shortening operational life and increasing lifetime project costs. The marginal CAPEX saving on the front end is offset by meaningfully higher project risk on the back end, including reduced stack lifetime and increased probability of premature stack failure. 

Power Supply Ramifications 

High current density designs operate at low voltage and high current. High-current power systems require heavier copper wiring and expensive power electronics.  

EVOLOH’s design takes the opposite approach: more thin cells in series produce higher stack voltage and lower current, enabling off-the-shelf power electronics that are significantly less expensive. 

Conventional Approach 2: High Electrolyte Concentration Provides Greater Efficiency 

Materials, Durability, and OPEX Additions 

Concentrated potassium hydroxide (KOH) improves electrochemical efficiency but is highly corrosive, degrading materials throughout the balance of plant (BoP). Leak events are hazardous. Maintenance complexity rises substantially, increasing OPEX. 

As with high current density, the efficiency gain is real but modest, and the total cost impact across CAPEX, OPEX, and operational risk offsets it. EVOLOH uses potassium carbonate, which is chemically benign, non-corrosive, and safe to handle, reducing BoP costs and operational complexity without sacrificing performance. 

Conventional Approach 3: Full Packaged Solution Leads to Lower CAPEX 

No Economies of Scale, Low ROCE, and a Linear Growth Curve 

Packaged plant designs — fully pre-assembled on skids or in containers — reduce installation cost and work well up to 10-15 megawatts. At larger scales, they eliminate economies of scale. In conventional process engineering, scaling a process by 10x typically increases cost by approximately 5x — not 10x. That cost advantage is what makes large-scale hydrogen projects financially compelling. Standardized packaged designs throw away this advantage. 

A standardized packaged design captures none of that benefit: each replicated unit costs as much as the last. The consequence is a linear cost curve where the industry needs a steep one: returns on capital employed (ROCE) remain low, the growth trajectory of the business is constrained, and there is no learning curve to drive costs down over time.  

EVOLOH designs for engineered scale at larger capacities, preserving the economies of scale that make large hydrogen projects viable. 

EVOLOH’s Solution to the Real Problem 

Unlike conventional approaches, EVOLOH’s solution accounts for all the structural barriers that have kept green hydrogen from crossing the commercial threshold. 

Industrialized AEM: The Ability to Scale and Be Profitable 

AEM electrolysis uses accessible technology — common materials, well-understood chemistry. The problem is that its low-volume, labor-intensive, batch assembly makes most AEM stacks as expensive as far more complex PEM systems, eliminating the cost advantage that alkaline chemistry should deliver. 

EVOLOH uses repeatable manufacturing processes in standard light industrial facilities: no 30-meter ceilings, large overhead cranes, or specialized infrastructure. Roll-to-roll production lines enable the manufacture of repeatable stack components at high speed, maximizing output per square foot of factory space.  

The result? Direct materials costs cut by more than 5x and factory costs reduced by more than 4x. And because the manufacturing model can be replicated in any standard light industrial space, EVOLOH can scale production capacity on a timeline that matches market demand. 

Direct-to-DC Architecture: Direct Connection to Renewable Energy Sources 

Direct-to-DC Lowers CAPEX and OPEX 

EVOLOH stacks are designed to operate at the voltage that solar photovoltaic (PV) systems naturally produce. Each stack module operates at 750 volts; two in series reach 1,500 volts, which is directly compatible with solar PV output. 

This design enables direct-to-DC (DDC™) connection: EVOLOH stacks connect directly to a solar array’s DC bus, eliminating the need for inverters, transformers, and rectifiers, and reducing both CAPEX and the ongoing maintenance associated with power conversion systems. 

Because there is no need for power electronics, DDC™ bypasses the long lead times — up to four years! — associated with power electronics sourced from major vendors, accelerating project timelines from FID to first production. And, by operating behind-the-meter on co-located renewable generation, DDC™ projects eliminate transmission, backup generation, and interconnection fees entirely, substantially reducing effective electricity costs. 

Rapid Response and Extreme Operability 

DDC™ is only viable because EVOLOH stacks can respond to variable solar output in real time. Unlike large alkaline stacks, EVOLOH stacks can cold-start, load-follow, and load-shed rapidly, tracking the variable output of a solar array directly. This operational flexibility is not incidental; it is a core design requirement that makes the behind-the-meter model work. 

It should be noted that DDC™ is a significant advantage in situations where co-located renewable generation is available, but EVOLOH’s stacks are equally suited to grid-connected projects. In those configurations, our low-current, high-voltage stack design enables the use of standard, off-the-shelf power electronics, which are simpler, less expensive, and faster to procure than the custom hardware competing designs require.  

Whether the project is direct-to-DC or grid-connected, our industrialized manufacturing model and stack design independently deliver unbeatable cost and operational advantages. 

Commercial-Scale Hydrogen Project at 3M Facility 

EVOLOH recently signed a commercial-scale project agreement with 3M to deploy our S440 packaged hydrogen system at a 3M manufacturing facility. The system — rated at 2.5 megawatts and our largest deployment to date — will be operational in 2027 and will be used in an emissions reduction application at the plant. 

 The system will be jointly operated by EVOLOH and 3M to collect performance data from a live industrial environment, providing real-world validation of our technology at commercial scale. The project qualifies for the full 45V Clean Hydrogen Production Tax Credit. 

Conclusion 

The electrolytic hydrogen industry has spent years pursuing a narrowly defined cost problem: electrolyzer hardware. Meanwhile, the structural barriers that actually determine commercial viability have gone largely unaddressed.  

Grid access costs, manufacturing inflexibility, and the requirements of project finance cannot be solved with a less expensive stack or electrolyzer. They require a fundamentally different approach to how electrolytic hydrogen is designed, manufactured, and deployed. 

EVOLOH identified those barriers early and built a comprehensive solution to address all of them. The result is an electrolytic hydrogen platform that is cost-competitive without subsidies, manufacturable at scale, and deployable at the speed project finance demands. The real problem with electrolytic hydrogen now has a real solution.