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Thu 10 Jul 2025
The Blue Marlin has become the world’s first hybrid solar-powered inland shipping vessel.
Equipped with 192 solar panels, the dry goods vessel feeds solar power directly into its diesel-electric propulsion system.
The cargo vessel, developed by HGK Shipping, will be used by Salzgitter AG, the German-based steel and technology group, to transport steel and bulk materials along the network of canals in north-west Germany.
At 86 metres long and 9.50 metres wide, and with a navigable draught of 1.10 metres, the vessel can transport loads weighing up to 3,110 tonnes in shallow waters.
Its solar panels were developed by Dutch maritime solar firm Wattlab, and the solar module system generates up to 37,500kWh of electricity a year.
This not only provides power to the vessel’s onboard systems but also operates in conjunction with four diesel generators to contribute power directly to the electric propulsion system.
David Kester, co-founder and COO of Wattlab, said: “This milestone means that HGK Shipping can proudly state that they are the first inland shipping company to operate a vessel that uses solar power directly for propulsion.”
Used in conjunction with its rudder propellors, the power generated by the solar system will enable temporary emission-free operations. According to HGK Shipping, this will cut the CO2 emissions of the vessel by up to 36,000kg every year.
Kester said: “In situations where the ship is lightly loaded and travelling downstream, we anticipate that it may even sail using only solar power for limited periods – an unprecedented achievement in the inland shipping sector.”
Installation of the Blue Marlin’s solar panel system took place at De Gerlien van Tiem shipyard in the Netherlands.
The vessel then performed several trial journeys along the canals before it was issued a permit for remote-controlled navigation by the German General Directorate for Waterways and Shipping, and delivered to Salzgitter.
Fabian Gerdes, head of customer logistics at Salzgitter Flachstahl, said: “We’re using this innovative vessel to continue our efforts to cut CO2 emissions and improve the efficiency and resilience of our supply chains.
“To achieve this, we’re increasingly relying on inland waterway shipping, which is particularly environmentally friendly when compared to other means of transport.”
Tim Gödde, director ship management at HGK Ship Management, said: “We are proud to pioneer the use of solar propulsion in inland shipping. The Blue Marlin demonstrates what’s possible when innovation meets engineering expertise.”
Last month, Finnish shipping company Viking Line revealed details of a fully electric passenger ferry planned for the Helsinki-Tallinn route.