Wartsila

Wärtsilä Corporation is a Finnish company which manufactures and provides power sources and equipment in both marine and energy markets. The company also acts as a battery energy storage system (BESS) manufacturer and integrator. IDTechEx spoke with the company at the Energy Storage Summit 2026.

Wärtsilä Corporation is a Finnish company which manufactures and provides power sources and equipment in both marine and energy markets. The company also acts as a battery energy storage system (BESS) integrator.

The technology group Wärtsilä will supply two 10-megawatt / 10-megawatt hour energy storage systems under an Engineering, Procurement, and Construction contract to Caribbean Utilities Company Ltd in the Cayman Islands. This project, which will be CUC's first energy storage facilities, will enable the utility to approximately double its renewable energy capacity on Grand Cayman, the largest of the three Cayman Islands.

The technology group Wärtsilä is delivering a 500-megawatt / 2-gigawatt hour portfolio of energy storage systems to clean energy developer and operator Clearway Energy Group. The contracts cover five sites located in Hawaii and California and include one of the world's largest ever solar-plus-storage project portfolios. The combination of energy storage and solar photovoltaic resources will provide essential grid reliability to balance an increasing mix of renewable generation.

The technology group Wärtsilä will partner with low carbon energy company SSE to deliver a 50 MW / 100 MWh energy storage system in Salisbury, Wiltshire. The battery will be the first connected directly to the transmission network by SSE's new solar and battery division and will support access to clean, reliable energy by balancing the intermittency of renewables.

The technology group Wärtsilä will collaborate with the Portuguese energy solutions provider and independent power producer Capwatt in the testing of a green hydrogen and natural gas blend fuel for Capwatt power plant located in Maia.

The technology group Wärtsilä will supply a 7.8-megawatt / 7.8-megawatt hour energy storage system to a leading gold mining company to help achieve its climate targets and decarbonisation goals at a mine in Suriname. This is the first utility-scale energy storage system to be built in Suriname and Wärtsilä's first energy storage project in the country.

The technology group Wärtsilä will supply a natural gas fuelled 110 MW flexible power plant to Cassano d'Adda in Italy. Wärtsilä's fast-starting internal combustion engine technology will be used to balance the power system and ensure its stability when the share of renewables is increased.

Wärtsilä will supply a 25-megawatt (MW) / 48-megawatt hour energy storage system to GIGA Storage BV in the Netherlands to help stabilise the electric grid. This will be Wärtsilä's first energy storage project in the Netherlands and it will be the country's largest system to date.

Class society RINA, together with technology providers ABB, Helbio (subsidiary of Metacon AB), the Liberian Registry, Wärtsilä and an Energy Major have entered in a common effort to deliver a solution with hydrogen as fuel that would exceed IMO 2050 targets for 70% reduction of carbon intensity without the need for extensive infrastructure investment, offering the shipping industry a low-carbon pathway in shorter timescales.

Wärtsilä will supply a 9.2 MW / 8.7MWh energy storage system to Zenith Energy, an Independent Power Producer in Australia. Zenith sells the electrical power it produces to some of the world's largest mining companies with operations in Australia.

The technology group Wärtsilä will supply a 5.2 MW / 5.2 MWh energy storage system to provide the frequency regulation in the ancillary service market for the Taiwanese grid as the country seeks to achieve 20 percent of its energy from renewable sources by 2025.