Wärtsilä will further expand its technical production capacity by thirty per cent at its Sustainable Technology Hub (STH) in Vaasa, Finland, and across its associated global supply chain. The investment for this amounts to about EUR 90 million.
This expansion follows the 35 per cent increase in technical production capacity, announced in February 2026, bringing the total planned increase to 65 per cent compared to Wärtsilä’s 2025 technical production capacity.
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Higher volumes of engines
This investment will enable Wärtsilä to deliver higher volumes of engines, meet increasingly growing market demand in the energy and marine industries, and better support customer needs and long-term business growth. In addition, the investment will strengthen the capacity across the associated global supply chain.
The earlier 35 per cent capacity expansion announced in February 2026 is expected to be commissioned in the first quarter of 2028, and the additional thirty per cent expansion in the first quarter of 2029.
Wärtsilä President and CEO Håkan Agnevall: ‘Demand in the energy and marine markets continues to develop positively, driven by rising electricity consumption and rapid data-centre growth in energy, and by decarbonisation regulation and the need for fuel efficiency and fuel flexibility in marine. Our customers turn to us for flexible and energy-efficient engine technologies to address their evolving power requirements. This investment strengthens our ability to respond to the increasing demand, support our customers’ requirements and reinforce Wärtsilä’s long-term market position, while enhancing our global supply chain.’
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Sustainable Technology Hub
Opened in 2022, the Wärtsilä STH in Vaasa currently encompasses 90,000 m2 and employs more than 3800 professionals. It serves as a centre for collaboration, innovation and partnership, bringing together Wärtsilä experts, customers, technology partners, and academic institutions. Each month, the STH welcomes around 1000 visitors.
All engine types in Wärtsilä’s portfolio are manufactured at the STH, which also houses a dedicated training centre and one of Wärtsilä’s remote monitoring centres, serving customers worldwide.
Since announcing the plan to establish the STH in 2018, Wärtsilä has invested over EUR 490 million into it, including a EUR 50 million investment to expand the R&D testing capabilities and facilities announced in April 2025, an office expansion commissioned early 2026, and the altogether EUR 230 million investment in expanding the technical production capacity and associated global supply chain, announced in 2026. The over 11,000-m2 facility extension, expected to be commissioned in early 2028, will host the increased capacity.
The centre is a cornerstone of Wärtsilä’s ambition to achieve carbon neutrality in its own operations by 2030. Designed for energy self-sufficiency, the building generates its own electricity and heat. Excess power is returned to the grid, while the heat from engine tests and other processes is stored in an energy storage tank to efficiently heat the facility.
Picture: Wärtsilä will invest approximately EUR 90 million to further expand its technical production capacity (photo by Wärtsilä).
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