”Electrifying a vessel like the MS SISSI proves that decarbonising European waterways doesn‘t require scrapping active fleets – it’s about empowering them with the right technology“, explains Matthias Schubert, Head of Sales at Lehmann Marine. ”Built to the highest international maritime safety standards, our CUBE battery system delivers a zero-emission solution that provides the thermal stability and power required to navigate the strong currents of the Danube and Inn – all optimised for tight onboard spaces and well accessible for easy maintenance and service.“

Decarbonising active fleets on these waterways offers immediate environmental benefits, drastically cutting exhaust emissions and eliminating engine vibration and noise along densely populated waterfronts.

Florian Noé, Managing Director of Donauschifffahrt Wurm & Noé, adds: „For more than 25 years, our MS SISSI has been a cherished piece of regional transit along the Danube and Inn. Transitioning an iconic vessel to fully electric power requires absolute confidence in both safety and system endurance. Lehmann Marine’s battery architecture gives us the exact reliability, fast-charging capacity, and safety safeguards needed to run dense daily schedules without interruption. Beyond the technical achievement, the immediate impact on our passengers and local environment is extraordinary – zero exhaust emissions and a completely silent cruising experience that respects the natural river ecosystems we operate in.“

This milestone highlights the growing impact of Lehmann Marine and Sunlight Group in the maritime sector – demonstrating how smart energy infrastructure can support municipal transit, protect fragile ecosystems, and power high-frequency commercial transport