Uniper’s Turkish Biomethane MoU Is an Option, Not a Supply Source

A memorandum is not a supply source. Uniper and Biotrend signed one on 30 September 2026, and the headline figure attached to it, up to 50 TWh a year of untapped Turkish biomethane potential, is a market estimate rather than anything Uniper has contracted.

What the paper actually commits Uniper to is nothing binding on volume, price or investment. The two companies agreed to assess converting waste-based biogas-to-power plants into biomethane producers, with exports to Europe routed via Greece or Bulgaria.

The deal sits inside a wider push by the German utility that already includes Spain and Rotterdam.

What the Uniper and Biotrend MoU actually commits, and what it leaves open

The scale numbers are large. Uniper estimates Türkiye’s untapped biomethane potential at up to 50 TWh per year, and the memorandum was signed at the Türkiye-North Rhine-Westphalia Business Forum in Istanbul.

Then the picture narrows. Biotrend, part of Doğanlar Holding, disclosed the document on Türkiye’s Public Disclosure Platform (KAP), and its own portfolio has an estimated potential of only about 1.4 TWh per year.

Non-binding by design The MoU creates no investment, sales or purchase obligations, and no firm commitment on volumes or prices.

Uniper CEO Michael Lewis said the tie-up could give European markets a fresh renewable gas source and broaden Uniper’s portfolio. The wording is aspirational; the terms are not.

The gap between 50 TWh and 1.4 TWh tells you the realistic near-term prize is a small slice of the headline potential. Treat the larger number as a market ceiling, not a Uniper pipeline.

Turkey’s energy strategy has leaned on rapid grid expansion, and that build-out, now at 126 GW, shapes how readily waste-based biogas plants could be connected, converted and certified for export.

The division of risk is plain: Biotrend builds and certifies, while Uniper only may buy. All four next steps are pre-investment:

• Technical and economic assessment of converting existing plants
• Joint identification of new biomethane projects in Türkiye
• Work on sustainability certification and regulatory compliance for EU exports
• Exploration of offtake arrangements, with volumes and pricing still to be negotiated

Where Türkiye fits in Uniper’s wider renewable gas portfolio

Uniper’s approach has been assembled in layers, and Türkiye is the newest and least mature of them. Three pieces now sit side by side:

1. Spain (supply): a seven-year agreement with Madrid-based Fivebioenergy SL for biomethane from three Murcia plants, announced on 6 October 2025, with deliveries from 2027. The gas is derived from organic waste.
2. Rotterdam (bio-LNG): an integrated biomethane-to-bio-LNG chain using existing infrastructure at the Gate terminal, serving road and maritime decarbonisation.
3. Türkiye (MoU): non-binding, feasibility stage, no volumes agreed.

The Spanish and Dutch pieces are the operational precedent against which the Turkish deal should be judged. They show a utility-led model combining sourcing, certification and trading, with Spanish-origin gas moving to the Netherlands as bio-LNG.

Uniper’s 1 August 2023 financial statement set a target of 5-10% renewable and lower-carbon gases in its gas sales mix by 2030.

2030 gas-mix target Uniper aims for 5-10% renewable and lower-carbon gases in its gas sales mix by 2030.

Uniper also plans to invest about EUR 5 billion through 2030, mostly in green and flexible generation, and its first-half 2025 statement targets 15-20 GW of capacity by decade end, 50% of it renewable, low-carbon or decarbonizable. Biomethane is a supporting line within that plan, not the lead.

Because the gas-mix target is a share and the disclosed deals carry no volumes, you cannot yet tell whether Türkiye is needed to hit it. Read the MoU as optionality rather than a requirement.

What Uniper has not disclosed

The Spanish contract volumes and pricing are not public. Neither are the Gate terminal’s bio-LNG capacity or Uniper’s current European biomethane volumes, so nobody should assume material volumes exist today.

How certification and mass balance decide whether Turkish gas counts as renewable

Is gas from Türkiye automatically green in Europe? No. It counts only if the paperwork holds.

Mass balance in plain terms

The EU’s Renewable Energy Directive III (RED III, Directive (EU) 2023/2413) sets sustainability and greenhouse gas criteria for bioenergy. It keeps mass-balance chain-of-custody rules for gaseous fuels, which means biomethane fed into a shared gas grid is tracked by accounting: the volume claimed as renewable at the exit point must match the certified volume that went in.

The Union Database tracks renewable fuels, including biomethane, to prevent the same volume being counted twice across borders. Voluntary schemes such as ISCC are recognised by the European Commission for demonstrating compliance, covering feedstock traceability and emissions savings.

The full legal text of Directive (EU) 2023/2413 sets out the sustainability and greenhouse gas criteria that any Turkish-origin biomethane would have to satisfy, and it is the framework behind the Union Database that registers cross-border volumes.

Conceptually, the chain for this route would run like this (a flow, not a confirmed process):

1. Waste feedstock is sourced and documented
2. The gas is certified under a recognised scheme
3. It is injected into the Turkish grid
4. It moves through an interconnector via Greece or Bulgaria
5. The volume is registered in the Union Database

Why a non-EU origin complicates it

Within the EU, the model works. Danish biomethane reaches Germany and neighbours, and utilities in the Netherlands, Germany, France and the Nordics import certificates to decarbonise portfolios without importing physical molecules.

Türkiye adds a non-EU jurisdiction to that system. The research found no Turkish injection, guarantee-of-origin or EPDK export rules for 2024-2026, and no post-2024 EU import-specific rules.

REPowerEU’s 35 bcm annual biomethane production target for 2030 shows the policy pull, but certification determines whether a molecule earns renewable value. That makes the regulatory work in the MoU the real gating item, more than plant conversion.

Can the MoU convert? Risks that decide the outcome

The structural case is real. Biomethane substitutes for fossil gas in hard-to-electrify heat and industry, bio-LNG serves shipping, and RED, the EU Emissions Trading System and FuelEU Maritime add compliance pressure. Support schemes and portfolio diversification add to the pull.

The AccelerateEU clean energy plan adds further compliance and investment pressure on utilities, which supports the structural case for renewable gases even where individual supply chains remain unproven.

The risks are about whether this particular chain works:

The severity column is this analysis’s judgement, not a research finding. No current EU biomethane price data was found, so cost comparisons stay qualitative.

Precedent points the same way. Successes tied themselves to recognised schemes and stable support; setbacks came from subsidy changes, feedstock shortfalls and certification problems.

Because the economics lean on policy support and certification rather than plant engineering, watch for regulatory and offtake news, not construction news.

Signals worth watching

• A binding offtake agreement with disclosed terms
• Published Turkish rules on injection, guarantees of origin and export
• Evidence that EU systems will recognise Turkish-origin certification
• Named new projects moving beyond feasibility

Reading the MoU as an option, not a forecast

The deal widens Uniper’s potential renewable gas sourcing, but it is early stage, non-binding and dependent on Turkish rules and EU certification. Spain and Rotterdam are the contracted evidence; Türkiye is optionality.

Three developments would change that assessment: a binding offtake with disclosed terms, clarity on Turkish guarantee-of-origin and export rules, and EU recognition of the certification route.

Until then, the sensible weight for this MoU in Uniper’s biomethane strategy is modest.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions. These statements are speculative and subject to change based on market developments and company performance.