Technology group Wärtsilä will deliver the fourth stage of the Eraring battery facility at Origin Energy’s (Origin) Eraring Power Station in New South Wales, Australia. The expansion adds 360 megawatt hours (MWh) of new energy storage capacity to the project, bringing the total capacity of the Eraring battery to 700 MW / 3,160 MWh. The project is the largest battery project in Australia and one of the largest in the world, continuing Wärtsilä and Origin’s leadership in pushing the boundaries of energy storage to enable a 100% renewable energy future. **The order was booked in Q4 2025.
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With this extension, the project will provide increased capacity to help balance the grid as renewable generation grows and coal-fired plants retire. The Eraring battery connects to Australia’s National Electricity Market (NEM) and provides critical grid services, including frequency control, firming capacity, and system strength support, that enhance system security and reliability as variable renewable energy supply increases.
As energy storage systems increase to the GWh scale, the number of data points needed to be managed grows exponentially. Wärtsilä’s market-leading GEMS Digital Energy Platform is designed to manage a complex project like Eraring, optimising performance, reliability, and value. Stage 4 will utilise Wärtsilä’s fully integrated, modular, and compact Quantum energy storage system. The project is supported by a multi-term service agreement, ensuring long-term reliability and optimal system efficiency.
Origin selected Wärtsilä for Stage 1 of the project in 2023, and for Stages 2 and 3 in 2024. Together, these stages have established Eraring as a cornerstone project in Australia’s clean energy transition and one of the world’s largest battery energy storage facilities.
The Stage 4 extension will commence in December 2025 and is expected to be completed by early 2027. With Stage 4 underway, Wärtsilä’s energy storage portfolio in Australia now exceeds 5.8GWh.
Technology group Wärtsilä will supply the main engines for two new pusher tugs being built for Brazilian operator AMAGGI. The ships are under construction at the Beconal shipyard, located in Manaus, Brazil, and are designed with a focus on decarbonised operations. The engines will run on biodiesel, a capability that was a key factor in securing this contract. The order with Wärtsilä was booked in Q4 2025.
The ships will each operate with two Wärtsilä 20 engines, equipped with a Wärtsilä Data Collection Unit (WDCU). The engines are able to run on either diesel or biodiesel fuel with a total power output of 2,100kW. This will allow each ship to push as many as 20 barges, carrying a total of 32,000 tons of grain on the Amazon inland waterway system. The Wärtsilä equipment is scheduled for delivery to the yard commencing in August 2026.
Technology group Wärtsilä has renewed its operation & maintenance agreement with Tasiast Mauritanie Limited S.A., a subsidiary of the Canadian group Kinross Gold Corporation for another three years. The agreement will ensure that the gold mine’s 60 MW power plant continues to operate reliably and safely to support the facility’s production schedules. The order with Wärtsilä was booked in Q2 2025.
Wärtsilä has been operating and maintaining the power plant since it was built in 2013. In connection with the power plant extension in 2022, an outcome-based element was introduced in the agreement focusing on delivering measurable results aligned with the mine’s commercial and operational targets in a sustainable way. The entire O&M agreement and the outcome-based element promote a shared responsibility between Wärtsilä and the customer in achieving these targets.
Wärtsilä supplied the equipment for the power plant in 2013, and extended the plant under an engineering, procurement and construction contract in 2021. A new project to install two additional Wärtsilä engines is currently in progress.
Spotted in the news, construction of a 500 MWh battery storage system for Peregrine has begun near Dallas, USA. Peregrine issued a press release the day before yesterday, on Dec 17.
Wärtsilä has agreed to sell its Gas Solutions unit, which focuses on gas solutions, to the German private equity investor Mutares SE & Co. KGaA.
Gas Solutions is known as a market leader in innovative systems and comprehensive lifecycle solutions delivered to the gas value chain. Its core expertise includes gas handling in marine transport, inert gas systems, gas-to-power solutions, as well as the delivery of liquefaction and biogas solutions. With its global operations, Gas Solutions supports customers on their journey towards a sustainable future by focusing on lifecycle expertise, innovation, and digitalization.
As part of the Wärtsilä Portfolio Business, the Gas Solutions unit has been managed independently with the aim of supporting Wärtsilä’s financial performance and unlocking value for the company through the divestment of the business. In 2024, Gas Solutions’ net sales were EUR 300 million.
The completion of the transaction is expected to take place during the second quarter of 2026, subject to the necessary approvals.
Technology group Wärtsilä will deliver a 100 MW / 223 MWh battery energy storage system (BESS) for innovative Australian renewable energy retailer, Flow Power. Located adjacent to the Morwell Terminal Station in Victoria, Flow Power’s Bennetts Creek BESS will provide essential ancillary services, such as frequency regulation, strengthening grid stability and accelerating Australia’s transition towards a renewable energy future. The order was booked in Q4 2025.
Here are Paul’s comments as Wärtsilä sells its Gas Solutions business to Germany’s Mutares.
Wärtsilä announced on Monday that it has agreed to sell its Gas Solutions business to the German private equity firm Mutares. The business is part of Wärtsilä’s Portfolio Business unit, which essentially houses the company’s non-core businesses intended for divestment. The transaction is expected to close in the second quarter of 2026, and in our assessment, its impact on the company’s results or share value will not be significant.
Thank you all for 2025 and a prosperous 2026! When planning for next year, it is worth checking Wärtsilä’s IR events, which are open to all, from the IR calendar. The pre-silent call is on 13 January and the data centre-focused call on 12 February. Welcome – please register via the IR calendar: IR Calendar
Technology group Wärtsilä will supply the engine and propulsion equipment for a new 3800 DWT heavy lift vessel being built for Netherlands based operator Hartman Seatrade. The owner has established a new shipyard, Rock Shipbuilding, where the vessel will be built. The order with Wärtsilä was booked in Q4 2025.
The vessel will operate with the Wärtsilä 31 engine, which features best-in-class fuel efficiency and minimised exhaust emissions. The engine’s modular design enables a significant reduction in maintenance requirements and costs, while providing the flexibility for both fast and slow steaming operations.
Wärtsilä will also supply the gearbox which will enable the vessel to operate in PTI (Power Take-In), PTO (Power Take-Off), and PTH (Power Take-Home) modes, thereby further improving fuel efficiency. The vessel’s Controllable Pitch Propeller (CPP) will be controlled by Wärtsilä EcoControl and hydrodynamically optimised with Wärtsilä’s Opti Design solution. Operating the propeller at low speed when full thrust isn’t needed will also deliver additional fuel savings. The Wärtsilä equipment is scheduled for delivery in spring 2027.
Wärtsilä has established a strong relationship with Hartman Seatrade over the years, having supplied equipment for several vessels in the company’s fleet.
Here are Pauli’s comments on Wärtsilä’s “pre-silent” call.
Wärtsilä held a public pre-silent call on Tuesday afternoon, where CFO Arjen Berends shared the company’s latest updates. We interpreted the tone of the call as continuing the positive trend familiar from previous quarters regarding the key units, Marine and Energy. We have predicted that the combined order growth for Marine and Energy will stall in 2026 due to strong comparison figures and a possible slowdown in the AI boom, but in our view, the pre-silent call did not particularly support this cautious narrative. The M&A front is more interesting for the company than before, as competitor Everllence is coming up for sale, and according to our interpretation, the company has quite openly stated that it is considering the acquisition target.
Wärtsilä Lifecycle Agreement ensures reliable performance and efficiency for 12 new LNG carriers
Technology group Wärtsilä has signed a 10-year Lifecycle Agreement with MOL Global Ship Management, a Singapore based ship management company fully owned by Mitsui O.S.K Lines (MOL). The agreement is designed to deliver operational support with reduced engine downtime and increased maintenance flexibility for 12 LNG carriers. The agreement for three of the vessels was booked by Wärtsilä in Q3 2025, with the remaining vessels booked in the first half of 2025.
Here is Ilkka Sinervä’s piece on how the Wallenbergs are potentially interested in buying Wärtsilä’s toughest competitor, Everllence.
The sale of the German diesel giant Everllence is linked to the Wärtsilä Group in that the investment company Investor, owned by the powerful Swedish Wallenberg family, owns approximately 17 percent of Wärtsilä and 14.4 percent of the Swedish EQT fund.
According to information from the Bloomberg news agency on Thursday, the Stockholm-listed EQT fund has emerged as one of the candidates in the acquisition speculations for the German Ex-MAN Diesel, now known as Everllence.
According to market rumors, the EQT fund has teamed up with the Singaporean fund GIC for the purchase of the German diesel giant.
Wärtsilä Investor Relations has entered a silent period, meaning we are focusing on preparing the financial statements. A summary of the pre-silent call is available on the IR blog: Summary of the Q4 2025 pre-silent period call
“What are the current delivery times for data centers, and why have they increased even though capacity is available?
At the end of Q3, we estimated that a 200 MW delivery for 2026 would be possible. This time window has now closed. A recently recorded data center order delivery is scheduled for 2027, and most of our capacity is now booked for that timeframe. Capacity still exists for this year, but it is filling up fast and varies by engine type and project size.”
Pauli has written a new company preview report as Wärre publishes its Q4 results on February 4.
Wärtsilä will report its Q4 financial statement release on Wednesday, February 4. We expect a strong quarter from the company in terms of revenue and earnings, as Energy equipment deliveries were weighted towards Q4 this year. We believe the new guidance will be one of the key share price drivers of the earnings release. Market activity appears to have remained good, but the high comparison figures for 2025 could, in our view, lead to more cautious guidance, mainly in Energy. We included the divestment of Gas Solutions and Energy’s latest data center order in the forecasts, which strengthened long-term earnings growth forecasts. We still expect Energy’s new equipment orders to decline slightly from the 2025 peak level in the coming years, and in our view, data center demand should not yet be priced into the stock as a permanent revenue growth driver. We reiterate our Reduce recommendation and raise the target price to EUR 30 (prev. EUR 26).
