Finnish marine and energy-tech group Wärtsilä has a long-standing engineering footprint in Portugal — from a 54.5 MW power plant supplied to EEM in Madeira to a green hydrogen blending pilot with Capwatt at the Sonae Campus plant in Maia and an integrated wind-solar-storage-thermal microgrid in the Azores.
Wärtsilä has been part of Portugal’s power-generation infrastructure for years. In 2008 the group won a contract to supply a 54.5 MW power plant to Empresa de Electricidade da Madeira (EEM), strengthening Madeira’s thermal backbone. In the Azores, Graciólica LDA operates an advanced energy management system that integrates wind, solar, storage and thermal generation, demonstrating Wärtsilä’s hybrid microgrid playbook on a Portuguese island grid.
On the mainland, the most visible recent activity has been with Portuguese energy solutions provider Capwatt. From 2023 Wärtsilä and Capwatt began testing green-hydrogen / natural-gas blends at the Capwatt combined heat and power plant in Maia, which uses a Wärtsilä 34SG engine and supplies the Sonae Campus plus the national grid. The pilot targeted blends of up to 10% hydrogen and required modifications to the engine, control system and plant automation; Wärtsilä’s broader roadmap is to reach engines capable of pure hydrogen operation.
Wärtsilä’s Portuguese references straddle three flavours of the corridor at once: legacy thermal infrastructure on the islands, hybrid renewable-thermal microgrids in the Azores, and frontier hydrogen-blending pilots on the mainland. Together they make Portugal a useful testbed for the Finnish group’s transition story — and a reference site Nordic OEMs cite when pitching similar systems into Iberian utilities and industrials.
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