Green Hydrogen
Industrial-scale clean hydrogen for hard-to-abate sectors. From PEM and alkaline electrolysis to long-duration energy storage and mobility — VoltWatt builds the green H₂ value chain that decarbonises European industry.
Hydrogen Capabilities
Comprehensive green hydrogen solutions from feasibility to operation, delivering clean molecules at industrial scale.
PEM Electrolysis Systems
High-efficiency proton exchange membrane technology for rapid response and superior hydrogen purity
- Quick start-up capability (< 30 seconds)
- Superior hydrogen purity (99.999%)
- Dynamic load response for renewable integration
- Compact design for space-constrained applications
Alkaline Electrolysis Systems
Proven alkaline technology optimized for large-scale industrial hydrogen production with cost-effective operation
- Scalable modular design (1-100 MW)
- Long operational lifespan (25+ years)
- Low maintenance requirements
- Proven commercial technology
High-Temperature Electrolysis
Next-generation solid oxide electrolysis cells (SOEC) achieving superior efficiency through waste heat utilization
- Highest electrical efficiency (90%+)
- Waste heat integration capability
- Reduced electricity consumption
- Industrial process heat utilization
Hybrid Production Systems
Integrated multi-technology platforms combining different electrolysis methods for optimized hydrogen production
- Multi-technology integration
- Optimized efficiency profiles
- Flexible operation modes
- Advanced control systems
Heavy-Duty Mobility & Refuelling
Turn-key hydrogen refuelling stations (HRS) for fleets of trucks, buses, trains and port equipment — decarbonising freight and public transport where batteries fall short.
- 350 & 700 bar dispensing
- Captive fleet & public-access HRS
- On-site production option
- Connecting Europe Facility (CEF) eligibility
Industrial Decarbonisation
Green hydrogen offtake for refineries, steel, fertiliser, glass and chemicals — replacing grey H₂ and natural gas with renewable molecules at industrial scale.
- Refinery & ammonia substitution
- DRI green-steel feedstock
- Pipeline & trailer logistics
- Long-term molecule PPAs (10 – 20 yr)
Reshaping Industrial Decarbonisation
From the steel mills of the Grand Est to the refineries of Iberia and the ports of the North Sea, every kilogram of green hydrogen we produce displaces fossil molecules that have powered industry for a century. We don't just build electrolysers. We build the energy backbone of post-carbon European industry.
Decarbonising the Hard-to-Abate
From steel to chemicals to heavy mobility, hydrogen is the missing link for sectors electrons alone cannot reach. We design industrial-grade plants that displace grey H₂ at competitive cost.
Coupled with Renewables
Our electrolysers run on dedicated solar and wind, ensuring traceable green molecules with verified Guarantees of Origin and full lifecycle accountability.
European at Scale
France, Iberia, Northern Europe — our pipeline targets industrial clusters and hydrogen valleys with grid, port and offtaker access already mapped.
Discover what our hydrogen expertise can do for your industrial site.
Talk to our hydrogen teamHydrogen For Your Business
Whether you operate a hard-to-abate industrial site, a mobility fleet, a public energy strategy or an investment fund — we structure green hydrogen partnerships that decarbonise your operations and secure long-term value.
Industrials Decarbonising
Steel, chemicals, refining, glass, fertilisers — replace grey hydrogen and fossil fuels with on-site or pipeline-delivered green H₂. Lock in long-term offtake at predictable cost and meet CSRD and CBAM obligations.
- Long-term H₂ supply agreements
- On-site or pipeline delivery
- CSRD & CBAM-ready reporting
Mobility & Logistics Operators
Trucks, buses, trains, ferries — accelerate the shift to zero-emission heavy mobility with reliable green H₂ refuelling. We co-develop hubs along strategic European corridors with bankable offtake guarantees.
- Hydrogen refuelling hubs
- Corridor-based supply contracts
- Fleet conversion advisory
Investors & Asset Owners
Co-invest in bankable hydrogen assets backed by long-term industrial offtakers. From electrolyser to storage to compression, we structure projects aligned with EU Hydrogen Bank and IPCEI funding.
- Bankable PPA & offtake structures
- EU Hydrogen Bank & IPCEI alignment
- ESG-aligned reporting
Public Authorities & Hydrogen Valleys
Anchor a hydrogen valley in your territory. We help regions, ports and energy agencies design integrated hydrogen ecosystems — production, storage, distribution and end-use — that attract industrial investment.
- Hydrogen valley masterplanning
- Tender & RED III response
- Multi-stakeholder governance
Hydrogen Project Lifecycle
End-to-end green hydrogen project development from feasibility to long-term operations.
Feasibility & Sizing
Renewable resource matching, electrolyser sizing, offtake structuring
Engineering & Permitting
EPC design, environmental studies, safety and HAZOP studies
Construction & Commissioning
Electrolyser procurement, civil works, hydrogen storage and compression installation
Operation & Optimisation
Performance optimisation, maintenance, GoO certification and offtake delivery
Next-Gen Hydrogen Technology
Combining the latest electrolyser stacks with smart energy management to deliver the lowest cost of green H₂ in Europe.
Modular Electrolysers
Latest-generation PEM and alkaline stacks scalable from 1 MW pilots to 500 MW industrial plants
Smart Energy Management
AI-driven dispatch matching electrolyser load to renewable production for lowest LCOH
Safety-First Engineering
ATEX-certified design, full HAZOP studies and 24/7 monitoring for industrial-grade reliability
A hydrogen partner built for industrial scale
European industrial groups, port authorities and public agencies choose VoltWatt because we own every link of the green hydrogen value chain — from the renewable electron to the certified molecule delivered at your gate. One team. One accountability. One twenty-year horizon.
Renewables, electrolysis, storage and offtake under one roof — no hand-offs, no slippage.
Bankable hydrogen supply agreements that lock in price stability for a generation.
A diversified hydrogen pipeline across France, Iberia, Northern and Central Europe.
Request a tailored hydrogen proposal in 5 working days
Share your H₂ volume, site location and timeline. Our hydrogen team comes back with an indicative price, contract structure, and a list of matching projects from our pipeline — confidential, no obligation.
- Indicative LCOH & supply tenor
- Matched projects from our pipeline
- Carbon & GoO impact summary
Response within 5 working days · Confidential · No obligation
Frequently Asked Questions
Everything you need to know about green hydrogen projects with VoltWatt.
What types of green hydrogen projects does VoltWatt develop?
We develop, finance, build and operate industrial-scale green hydrogen plants across Europe — from PEM and alkaline electrolysers (1–500 MW) to integrated hydrogen valleys combining production, storage, compression and distribution. Every plant is powered by dedicated solar, wind or hybrid renewables.
How long does a hydrogen project take to develop?
A typical industrial green hydrogen plant takes 3 to 5 years from feasibility study to commissioning, depending on size, permitting and renewable supply structure. Hydrogen valley masterplans generally span 5 to 8 years to reach full deployment.
What sectors benefit most from green hydrogen?
Hard-to-abate industrial sectors gain the most: steel (replacing coal in direct reduction), chemicals (green ammonia, methanol, fertilisers), refining, glass, and heavy mobility (trucks, buses, ferries, trains). Green H₂ also enables long-duration energy storage at multi-MWh scale.
How is the green origin of your hydrogen guaranteed?
Every kilogram we produce is backed by Guarantees of Origin compliant with the EU RED III Delegated Acts. Renewable electricity is contracted via direct PPA or co-located generation, with full traceability through digital certification.
Can VoltWatt fund a hydrogen project on our industrial site?
Yes. We offer fully financed Build-Own-Operate models where VoltWatt funds, builds and operates the electrolyser on your site, and you simply pay for the hydrogen delivered. We also co-develop with industrial partners and apply for EU Hydrogen Bank, IPCEI and national subsidies.
What is the typical cost of green hydrogen?
Industrial green hydrogen in Europe currently sits in the 4–7 €/kg range, depending on renewable resource, plant size and electricity contract structure. Our integrated approach — combining own renewables, scale and EU funding — targets a sub-3 €/kg LCOH by the end of the decade.
Partner with Hydrogen Energy Experts
Leverage our hydrogen expertise to decarbonise your industrial operations and secure long-term green H₂ supply.
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