Plenitude and Methagora’s 15-year biomethane deal signals new momentum in French renewable gas expansion

Plenitude and Methagora have struck a 15-year supply agreement that will see 50 GWh of biomethane delivered annually into the French market, a deal that industry participants say underscores growing commercial interest in certified renewable gas as part of broader industrial decarbonisation strategies. According to a Plenitude statement, the biomethane will be produced at agricultural methanation sites across France and registered under the French Biomethane Production Certificates (BPC) scheme, giving end consumers access to locally sourced, certified volumes.

The transaction aligns with Methagora’s operating model, which targets existing biogas-to-energy installations currently running in cogeneration and converts them for grid injection by fitting purifiers, compressors and expansion valves. Methagora reports having already converted five sites, with 35 GWh of biomethane sold to date, and plans to double its injected capacity in 2026. The firm positions such conversions as a pragmatic route to scale biomethane output by repurposing assets rather than building wholly new plants.

For Plenitude, the agreement complements its expanding footprint in France. The company serves nearly one million retail customers and operates roughly 1 GW of installed renewable capacity in the country, part of a wider growth agenda that has included large-scale acquisitions of operating wind and solar assets. Plenitude is also increasing activity in electric vehicle charging, signalling a multi-vector approach to decarbonised energy services that combines power, low-carbon gas and mobility infrastructure.

Market observers say long-term offtake contracts like this one are important to mobilise capital into biomethane projects, because predictable revenue streams lower financing risk for project owners and conversion specialists. The use of the BPC framework is intended to provide transparency and traceability for buyers seeking to demonstrate the carbon credentials of the gas they supply to customers.

The deal arrives amid a wave of corporate biomethane purchasing in France aimed at industrial and commercial decarbonisation. Arkema, for example, last year agreed an eight-year contract with ENGIE for 25 GWh per year to supply several Bostik sites, covering the bulk of those locations’ gas needs, illustrating how industrial offtakers are deploying biomethane to hit Scope 1 reductions. Such contracts point to an emerging market architecture in which producers, aggregators and large buyers coordinate to convert agricultural and industrial feedstocks into grid-injected biomethane.

From a technical perspective, converting cogeneration units to grid injection poses operational and permitting challenges, including the need to upgrade purification systems, ensure gas quality and secure grid interconnection and certification under national schemes. Methagora’s stated focus on retrofits seeks to address these barriers by offering turnkey conversions, while buyers like Plenitude can aggregate volumes from multiple sites to meet retail and corporate demand.

For policymakers and sector planners, the agreement highlights the dual role of support mechanisms and corporate demand in scaling biomethane. Industry data indicate that long-term offtakes anchored to certificate schemes can accelerate deployment by improving bankability, while also fostering regional value chains in agriculture and waste management. Analysts note, however, that sustaining growth will require continued clarity on sustainability eligibility rules, feedstock traceability and lifecycle carbon accounting to ensure biomethane delivers genuine emissions reductions versus fossil gas.

The tie-up between Plenitude and Methagora therefore represents both commercial progress and a test of the market structures needed to expand biomethane at scale. If similar procurement arrangements proliferate , and if conversion projects meet technical, regulatory and sustainability thresholds , biomethane could become a material contributor to the decarbonisation of industrial heat, mobility and building sectors where electrification is constrained.