Wärtsilä is to invest approximately €90 million in a further expansion by 30% of technical production capacity at its Sustainable Technology Hub in Vaasa, Finland and across its associated global supply chain. This expansion follows the 35% increase in technical production capacity, announced in February 2026, bringing the total planned increase to 65% compared to Wärtsilä’s 2025 technical production capacity.
The investment will enable the company 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% capacity expansion announced in February 2026 is expected to be commissioned in the first quarter of 2028, and the additional 30% expansion in the first quarter of 2029.
“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. 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” says Wärtsilä president and CEO Håkan Agnevall.
Opened in 2022, the Sustainable Technology Hub in Vaasa currently encompasses 90 000 square metres, serving as ‘a centre for collaboration, innovation and partnership, bringing together Wärtsilä experts, customers, technology partners, and academic institutions’.
Since announcing its plan for the STH in 2018, Wärtsilä has invested over €490 m in the facility, including a €50 m investment to expand the R&D testing capabilities and facilities announced in April 2025, and the altogether € 230 m investment in expanding technical production capacity and the associated global supply chain announced this year. The over 11 000 square m 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 collected in an energy storage unit to heat the facility.
