How Ren-Gas Is Solving the "Which Hydrogen Counts as Green" Problem
How Ren-Gas Is Solving the “Which Hydrogen Counts as Green” Problem
Green Hydrogen Is More Complicated Than It Sounds
Calling hydrogen “green” is not simply a matter of using an electrolyzer powered by electricity.
For hydrogen to qualify as renewable hydrogen under the European Union's Renewable Fuels of Non-Biological Origin (RFNBO) framework, producers have to demonstrate that the electricity used meets specific regulatory requirements and that the resulting fuel delivers the required greenhouse-gas savings.
This creates an important question for developers: How do you prove that the electricity used to make hydrogen is genuinely renewable and compliant?
Nordic Ren-Gas is building its answer around a combination of renewable electricity contracts, Guarantees of Origin, flexible production and detailed verification.
Its Tampere Power-to-Gas project in Finland is being designed specifically around these requirements. (Ren-Gas Oy)
The Problem: Not Every “Renewable” Electron Automatically Qualifies
A company can purchase renewable electricity and still need to demonstrate that the electricity satisfies the requirements applicable to RFNBO production.
For an industrial hydrogen producer, this means managing more than simply electricity price and supply volume.
The producer needs a system that can demonstrate:
Where the electricity comes from
That it is renewable
When it was produced and consumed
How the electricity supply relates to hydrogen production
That the production pathway meets RFNBO requirements
That the resulting fuel can be verified as compliant
This is where Ren-Gas's Hydrogen Power Purchase Agreement (H2PPA) model becomes important.
Ren-Gas Uses H2PPAs Instead of a Conventional PPA
In September 2026, Ren-Gas announced long-term H2PPAs with Helen and another renewable electricity supplier for its Tampere e-methane plant.
According to Ren-Gas, the agreements cover physical renewable electricity deliveries together with the corresponding Guarantees of Origin (GOs) needed for renewable hydrogen and RFNBO production.
The contracts also incorporate RFNBO compliance, balancing and verification rather than treating electricity procurement as a separate issue from fuel certification. (Ren-Gas Oy)
That distinction is important.
A conventional corporate PPA primarily secures electricity. Ren-Gas's H2PPA is designed around the specific requirements of producing renewable hydrogen and downstream RFNBO fuels.
What Are Guarantees of Origin?
A Guarantee of Origin is an instrument used to document the renewable origin of energy.
For Ren-Gas, the GOs form part of the documentation supporting the renewable character of the electricity used for hydrogen production.
The company says its Tampere electricity portfolio combines physical renewable electricity with the corresponding GOs and verification mechanisms to support RFNBO-compliant production. (Ren-Gas Oy)
This creates a traceable connection between renewable electricity procurement and the hydrogen production process.
The Electricity Has to Work With the Plant
There is another challenge: renewable electricity is not necessarily available at a constant output.
Wind and solar generation fluctuate, while an electrolyzer and downstream methanation plant need to operate within defined technical and regulatory parameters.
Ren-Gas is therefore designing the Tampere facility for flexible operation.
The plant can adjust production according to renewable electricity availability instead of simply operating at a fixed rate regardless of the power source. Ren-Gas says the system is designed from the beginning to meet the strict requirements associated with RFNBO fuels. (Ren-Gas Oy)
This is where the electricity contract and plant engineering become closely connected.
Hydrogen Production Starts With Renewable Power
At the Tampere facility, renewable electricity will be converted into hydrogen through electrolysis.
Ren-Gas selected Sunfire as the electrolyzer supplier, with its pressurized alkaline electrolysis technology intended to convert renewable electricity into hydrogen for the e-methane process. (Ren-Gas Oy)
The current project design lists a planned 50 MW hydrogen production capacity alongside a 25 MW e-methane production capacity. Production is targeted to begin in 2028. (Ren-Gas Oy)
The hydrogen then becomes one half of the feedstock combination used to manufacture synthetic methane.
The Other Half Comes From Biogenic CO₂
The hydrogen will be combined with captured carbon dioxide to produce renewable e-methane.
At Tampere, the CO₂ will be captured from flue gases generated by existing energy production. Ren-Gas has selected Saipem for the carbon-capture system. (Ren-Gas Oy)
The project therefore creates an integrated chain:
Renewable electricity → Hydrogen → Hydrogen + biogenic CO₂ → E-methane
The resulting e-methane can then use existing gas infrastructure and serve applications such as heavy transport and industry. (Ren-Gas Oy)
Why Flexible Operation Matters
The ability to adjust production is not simply an engineering convenience.
Ren-Gas says the Tampere plant has been designed to operate flexibly within RFNBO requirements, with production adapting to the availability of renewable electricity.
The hydrogen handling system includes compression and storage, giving the plant additional flexibility to ramp production up and down as electricity conditions change. (Ren-Gas Oy)
This allows the project to connect electricity-market conditions with hydrogen production rather than treating the electrolyzer as an isolated unit.
Ren-Gas Is Building the Certification Into the Plant
This is arguably the most important part of the approach.
Instead of producing hydrogen first and figuring out certification afterward, Ren-Gas is incorporating renewable electricity procurement, hydrogen production, storage, automation, monitoring and verification into the plant's original design.
The company says its H2PPA framework combines physical electricity supply, GOs, RFNBO compliance, balancing and verification in one contractual structure. (Ren-Gas Oy)
The plant's automation architecture is also being designed around this requirement. Ren-Gas has selected Valmet and Insta Automation for automation and process-control systems, while Sweco is serving as EPCm provider and project integrator. (Ren-Gas Oy)
Why This Matters for E-Methane
The hydrogen produced at Tampere is not the final product.
It will be combined with captured biogenic CO₂ to manufacture renewable e-methane, which Ren-Gas markets as an RFNBO fuel.
That means the renewable status of the hydrogen is fundamental to the status of the final fuel pathway.
Ren-Gas's approach therefore connects the entire chain—from electricity procurement to hydrogen production and finally to synthetic methane—under one compliance framework. (Ren-Gas Oy)
Existing Infrastructure Gives the Fuel Another Advantage
Once produced, e-methane can use existing gas infrastructure.
Ren-Gas says its e-methane is designed to be compatible with existing gas networks and usable in transport, industry and shipping. (Ren-Gas Oy)
The company has also secured a long-term offtake agreement with avanca Energy and Alternoil for renewable e-methane from the Tampere facility. The agreement, announced in July 2026, was valued at €1 billion over its term and is intended to connect Finnish production with Europe's renewable LNG distribution network. (Ren-Gas Oy)
This gives the renewable hydrogen a defined route into a commercial fuel product.
From “Green Hydrogen” to Verifiable Renewable Fuel
The bigger lesson from the Tampere project is that producing renewable hydrogen is increasingly becoming a traceability and compliance challenge as well as a technology challenge.
Electrolysis itself is well understood. The harder question for commercial developers is proving that the electricity used meets the applicable rules consistently enough for the hydrogen and downstream fuels to qualify.
Ren-Gas is addressing that challenge by linking:
Long-term renewable electricity contracts
Guarantees of Origin
RFNBO compliance
Flexible electricity use
Hydrogen storage and handling
Automated monitoring
Verification
Downstream e-methane production
The result is a production model designed around certified renewable hydrogen rather than simply hydrogen produced with electricity described as renewable.
What Happens Next
Ren-Gas's Tampere project is moving toward construction, with the company targeting Q4 2026 for the start of construction and 2028 for production. The project also has an expanded European Investment Bank financing framework, with the EIB approving up to €680 million for Ren-Gas's Finnish e-methane portfolio. (Ren-Gas Oy)
If the project proceeds as planned, Tampere will demonstrate how renewable electricity procurement, regulatory compliance and flexible hydrogen production can be integrated into a commercial Power-to-Gas system.
The real test will not simply be whether Ren-Gas can produce hydrogen. It will be whether it can produce hydrogen whose renewable origin and RFNBO compliance can be demonstrated consistently at industrial scale.
Sources
https://ren-gas.com/news/ren-gas-selects-technology-partners-for-tampere-e-methane-plant-2/?
https://ren-gas.com/fi/ajankohtaista/ren-gas-secures-renewable-electricity-for-tampere-e-methane-plant-through-h2ppa-portfolio-2/?
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