Wärtsilä Marine is a global pioneer in power, propulsion, digital, and lifecycle solutions for the marine market. We develop industry-leading technologies, advancing maritime's transition to alternative fuels. We support building an end-to-end digital ecosystem where vessels and ports are connected.
The energy sector is undergoing a transformative shift as it works to decarbonise while continuing to deliver reliable and affordable energy to everyone – from homes to heavy industry. This transition presents tremendous opportunities for innovation and progress, and we are ready to lead the way.
1 October 2026, Wärtsilä closed the transaction of the joint venture for its Energy Storage business, following the agreement with German engineering company RCT Solutions GmbH announced on 15 June 2026. Under the arrangement, Wärtsilä and RCT Solutions each hold a 50% ownership stake in the joint venture, called Valo.
The joint venture combines Wärtsilä's global energy storage capabilities with RCT Solutions' engineering expertise and supply chain and is designed to provide a strong platform for long-term growth in the rapidly evolving energy storage market. The Energy Storage business has been the smallest segment within Wärtsilä, with about 450 employees globally and net sales of EUR 694 million in 2025.
