Shares of Plug Power (PLUG) advanced nearly 5% in premarket trading on Tuesday morning after the hydrogen infrastructure company announced a significant supply agreement connected to Europe's expanding sustainable aviation fuel sector.

Under the deal, Plug will supply 280 megawatts of electrolyzers for a proposed Arcadia eFuels production facility in Denmark, while a wider strategic framework signed at the same time designates the company as the primary supplier for more than 1 gigawatt of additional prospective Arcadia developments across Europe and the Americas.

280 MW Supply Agreement for Project ENDOR

Plug Power reached an agreement to deliver 280 megawatts of electrolyzers to Arcadia eFuels, with the equipment designated for Project ENDOR, a proposed synthetic fuel production facility located in Denmark.

Project ENDOR is to be located at the Port of Vordingborg along Denmark's southern coastline. The facility will use renewable electricity drawn from the grid to power Plug's GenEco electrolyzer systems and, once operational, is projected to generate approximately 110 tons of green hydrogen daily.

That hydrogen serves as the foundational component of Arcadia's planned fuel production. The company intends to merge it with captured carbon dioxide emissions to produce e-SAF, a synthetic aviation fuel that is compatible with existing aircraft engines and requires no modifications.

Broader Strategic Partnership Expands the Opportunity

The ENDOR supply contract represents only part of a more comprehensive arrangement. Plug and Arcadia simultaneously executed a strategic cooperation framework encompassing four additional developments, with facilities planned across multiple locations in Europe and the Americas. Collectively, these projects account for over 1 gigawatt of prospective electrolyzer capacity, and the framework designates Plug as the primary supplier.

Under the arrangement, Arcadia also receives preferential access to Plug's production facilities — a provision that becomes increasingly significant as each subsequent project advances through its development stages. The partnership is the result of approximately three years of collaborative technical development between the two organizations.

Plug characterized the supply agreement as one of several documents Arcadia requires before reaching a final determination on ENDOR.

Outstanding Milestones and Contingencies

Although the agreement is finalized, the implementation schedule remains uncertain. Equipment shipments for the 280 MW ENDOR facility will commence only after Arcadia provides an official authorization to proceed.

Project ENDOR has not yet secured its final investment decision — the critical milestone that typically determines whether a development receives construction approval and financial backing. The four additional projects covered by the strategic cooperation framework represent prospective opportunities rather than confirmed purchases, making financing approvals and construction authorizations crucial indicators moving forward.

Regulatory Mandates Drive e-SAF Demand

Market demand for e-SAF is driven primarily by regulatory requirements. The European Union's ReFuelEU Aviation rules mandate progressively increasing percentages of sustainable fuel usage at airports throughout Europe and incorporate a designated provision for synthetic aviation fuels beginning in 2030 — the market segment both Arcadia and Plug are positioning to serve.

Plug maintains an established footprint in the sector, advancing numerous hydrogen initiatives throughout Denmark, the United Kingdom, Spain, and Portugal. A notable example is a 100 MW GenEco deployment at Galp's Sines refinery facility in Portugal, which is currently in progress as the company expands its European electrolyzer operations. Measured against that benchmark, the 280 megawatts earmarked for ENDOR would amount to nearly a threefold increase in capacity over a single European deployment.

The Arcadia partnership introduces another prospective client to that portfolio, subject to upcoming financing and construction decisions. Plug Power (PLUG) stock was trading approximately 5% higher in premarket activity after the deal was disclosed.

This article was originally published on Blockonomi.