Ultrapure Water Unit Electrolysis Cost Morocco

A green-hydrogen electrolyser in Morocco needs about 9 litres of ultrapure water for every kilogram of hydrogen it makes, and the treatment train that delivers it usually lands at 1 to 5 percent of total plant capital cost. For a Tarfaya-scale ammonia complex that still runs into the low tens of millions of dollars. This guide breaks down what drives that number and how foreign suppliers quote it.

What an Electrolysis Ultrapure Water Unit Actually Is

This is not municipal water treatment, and it is not the same machine as a seawater desalination train. An electrolyser feedwater unit takes water that is already reasonably clean, often the product of an upstream reverse-osmosis desalination plant, and polishes it to a purity that protects the electrolyser stack.

The number that matters is conductivity. Standard alkaline stacks tolerate feedwater below 1 microsiemens per centimetre. PEM and advanced alkaline stacks demand below 0.1 microsiemens per centimetre, according to Hydrogen Tech World. Tap water sits around 500 to 800. So the unit has to strip almost every dissolved ion, and any drift above spec scales the membranes, fouls the electrodes, and shortens stack life. That is why buyers treat this as a Type I/II ultrapure spec, closer to a pharmaceutical or semiconductor water loop than to a drinking-water plant.

The standard build is two-stage. Reverse osmosis removes the bulk of dissolved salts and organics, then electrodeionization polishes the stream to ultrapure levels without the chemical regeneration that old mixed-bed ion exchange needed. Envirogen describes this RO-plus-EDI configuration as the standard approach for electrolyser feedwater, delivered as a compact skid or containerised module. Larger plants add a double-pass RO, carbon-dioxide removal, and ion-exchange softening ahead of the polish.

For the upstream desalination and brine side, which is a separate buy with its own economics, see our Morocco energy infrastructure guide. This page is about the polishing unit that sits between desalination and the stack.

How Big a Unit Morocco’s Projects Need

Sizing follows the electrolyser, not the other way round. A practical rule of thumb is roughly 200 litres per hour of ultrapure water per megawatt of electrolyser capacity, with cooling water on top at about double that. So a 100 MW electrolyser pulls on the order of 20 cubic metres per hour of ultrapure feedwater.

Morocco’s pipeline turns that rule into real tonnage. OCP Group’s Tarfaya green-ammonia complex, developed by HydroJeel, targets 1 million tonnes a year of renewable ammonia by 2027, scaling to 3 million by 2032, powered by a dedicated 3.8 GW of wind and solar. Ammonia at that scale implies gigawatts of electrolysis, and the project carried roughly a $7 billion price tag for the ammonia facility. The wider Offre Maroc programme approved six green hydrogen projects worth USD 32.5 billion in March 2025. Every one of those electrolysers needs a feedwater unit.

A useful reference point for what a discrete unit looks like: Everfuel’s HySynergy plant in Denmark specified 4.5 cubic metres per hour of ultrapure water for a 20 MW phase, on a double-pass RO with carbon-dioxide removal and ion-exchange softening. Morocco’s gigawatt-scale projects are this unit multiplied many times, or a handful of large parallel trains.

The Cost Build (Indicative Ranges, Clearly Labelled)

We do not publish fabricated equipment prices. What follows are indicative ranges built from public engineering sources, not a quote. Always confirm against a vendor proposal scoped to your water analysis and stack chemistry.

The first thing to internalise is that the water unit is a small slice of the plant. Across published green-hydrogen cost breakdowns, water treatment runs at 1 to 5 percent of total plant capital expenditure, while the electrolyser stacks alone take 50 to 60 percent. That ratio is the single most useful budgeting anchor a procurement lead has. If your electrolyser package is quoted, the feedwater unit should land inside that band, and a number far outside it is a flag to question the scope.

The capital cost drivers, in rough order of weight:

The throughput in cubic metres per hour sets the frame size, membrane area, and EDI stack count. The feedwater source matters almost as much. Polishing an existing RO permeate is cheap. Taking raw seawater all the way to ultrapure inside the same skid is a different machine, because you are then buying the desalination front end too. Redundancy is the next lever. Hydrogen plants run continuously, so most specs ask for N+1 trains or standby polishing, which adds capital but protects stack warranty. Containerisation, instrumentation, and remote monitoring round out the build.

On the operating side, the honest framing is that the water unit is not where the money goes. For a hydrogen plant, electricity is 60 to 80 percent of total operating cost. The water unit’s running cost is membrane and EDI-module replacement on a multi-year cycle, antiscalant and cleaning chemicals, and the pumping energy, which is modest next to the stacks. A buyer who optimises the feedwater capex at the expense of reliability is saving pennies against the dollars tied up in stack uptime.

Two cost mistakes show up repeatedly in Moroccan tenders. First, scoping the unit against tap-water purity instead of the stack’s actual conductivity ceiling, which under-sizes the polish and triggers warranty disputes later. Second, treating the unit as a commodity skid when it is warranty-linked process equipment. The cheaper skid that drifts above 0.1 microsiemens voids the stack guarantee, and the stack is the expensive half of the plant.

Who Buys Electrolyser Feedwater Units in Morocco

The buyer is rarely the water-equipment specialist directly. It is the hydrogen project’s EPC contractor or the developer’s process team, both of whom fold the feedwater unit into a larger electrolysis package.

OCP Group is the anchor buyer through its Jorf Lasfar and Tarfaya hydrogen and ammonia hubs, sourcing electrolysers, ammonia synthesis equipment, and the water trains that feed them. The Offre Maroc consortia, including Acciona, Nordex, TAQA, Ortus, and UEG, each run their own procurement once their projects reach financial close. At Tarfaya the project entity is HydroJeel acting for OCP. On the public-utility side, ONEE owns water and conventional generation procurement, though the hydrogen feedwater scope sits with the project developers rather than the utility.

The practical route to these buyers is the EPC qualified-vendor list. Process-water packages get locked into the electrolysis EPC scope, so the supplier who is already on the integrator’s approved-vendor list at front-end engineering wins the work. Get qualified before financial close, because vendor lists close early and re-opening them mid-project is rare. For the full named-buyer map and the ammonia synthesis back end, the Morocco energy infrastructure guide lays out who owns which scope.

FX, Letters of Credit, and How These Units Get Paid

The dirham tracks a managed basket weighted 60 percent euro and 40 percent dollar, backed by an active IMF Resilience and Sustainability Facility. For a foreign supplier that means reliable FX for capital-goods imports through Bank Al-Maghrib channels and a predictable currency to quote against. Price European-built units in euro and US or Gulf-backed project supply in dollar, matching the SPV’s debt currency.

Because most hydrogen assets sit inside project-financed special-purpose vehicles, payment usually runs on a letter of credit confirmed by Attijariwafa Bank, Banque Centrale Populaire, or Bank of Africa, with larger scopes wrapped by export-credit cover from Coface, SACE, Cesce, or Sinosure. A water-unit package is small enough to settle on a straightforward confirmed LC, typically with a 20 to 30 percent advance against bank guarantee, the balance against shipping and commissioning documents. Build a 5 to 10 percent bonding line for performance and retention into your price.

Dying Conventional Channels for Process-Water Equipment

The old way of selling treatment skids into Morocco still runs, but the returns keep thinning.

Pollutec Morocco in Casablanca is the headline water and environment fair, and it is now a branding and relationship event more than a lead source. A booth plus travel runs a mid-size supplier EUR 30,000 to 80,000 for one show, and the yield is a handful of warm contacts. At USD 300 to USD 900-plus per qualified lead, fairs maintain visibility but do not build primary pipeline for a niche product like electrolyser feedwater.

Distributor lock-in is loosening because the big hydrogen projects are developer-led. OCP, Acciona, and TAQA negotiate process equipment directly with global suppliers, which bypasses the legacy water-treatment distributor and the margin that goes with it. A supplier who defaults to finding a local distributor loses both the margin and the direct relationship with the engineering team that writes the spec.

Expat field reps are expensive and narrow. A technical-sales engineer based in Casablanca runs EUR 100,000 to 180,000 fully loaded and realistically covers one or two segments, which is hard to justify for an equipment line this specialised. At USD 500 to USD 1,200-plus per qualified lead, the math only works above several million euros of annual Morocco revenue. Government trade missions from Business France, GTAI, or ICEX help with first contact but cannot follow the 12 to 24 month procurement cycle a hydrogen project actually runs on.

By contrast, an AI-powered outbound engine that targets named process and procurement engineers at OCP, the Offre Maroc consortia, and their water-treatment EPCs starts at USD 150 to USD 300 per qualified lead and gets cheaper as it learns the buyer set. Trade fairs and field reps scale linearly or worse. AI outbound compounds, because the cost of researching the next named contact falls as the engine maps the account universe. Suppliers on the manufacturing side can see how the same RO and EDI capability sells from a producer’s angle in our guide to Canadian water treatment equipment manufacturers.

Frequently Asked Questions

How much ultrapure water does an electrolyser need in Morocco?

Roughly 9 litres of ultrapure water per kilogram of hydrogen for the electrolysis itself, plus cooling and treatment losses that push total consumption toward 20 to 30 litres per kilogram. As a sizing rule, plan about 200 litres per hour of ultrapure feedwater for every megawatt of electrolyser capacity.

What does an electrolyser feedwater unit cost relative to the plant?

Water treatment typically runs 1 to 5 percent of total green-hydrogen plant capital cost, while electrolyser stacks take 50 to 60 percent. Treat the published figures as indicative budget anchors, not quotes, and confirm against a vendor proposal scoped to your water analysis and stack chemistry.

What water purity do Moroccan electrolyser projects require?

Standard alkaline stacks need feedwater below 1 microsiemens per centimetre conductivity, while PEM and advanced alkaline stacks demand below 0.1. That is a Type I/II ultrapure spec, far tighter than drinking water, which is why a reverse-osmosis stage is followed by electrodeionization polishing.

Who buys these units in Morocco?

OCP Group anchors demand through Jorf Lasfar and Tarfaya, and the Offre Maroc consortia, Acciona, Nordex, TAQA, Ortus, and UEG, each procure once at financial close. In practice the feedwater unit is bought by the electrolysis EPC contractor, so the route in is the integrator’s qualified-vendor list before close.

Is this the same as a desalination plant?

No. Desalination turns seawater into clean water and is sized in tens of thousands of cubic metres a day. The electrolyser feedwater unit polishes that already-clean water to ultrapure spec for the stack, sized in cubic metres per hour. They are separate buys with separate economics, often supplied by different vendors.

Send Us Your Spec

If you build electrolyser feedwater units, RO-plus-EDI skids, or containerised ultrapure trains and want to reach the Moroccan hydrogen pipeline, send your specification and we will route it to the right procurement and engineering teams. Share your throughput in cubic metres per hour, your conductivity target, footprint constraints, and any reference projects, and start a conversation or reach Burak directly at burak@papaverai.com.

For the full sector map and named buyers, start at the Morocco energy infrastructure guide. For the wider industrial picture, see the Morocco industrial and procurement guide.