The first hybrid inland solar-powered ship takes sail

A solar energy system for HGK Shipping’s inland cargo ship The Blue Marlin was supplied by Dutch marine solar developer Wattlab, marking a significant advancement in maritime sustainability. The ship is the first hybrid solar-powered inland transport vessel in the world, with 192 sun panels that power its high-voltage propulsion system and onboard systems.

While Wattlab – a Dutch company specialising in solar energy solutions for the maritime industry – and HGK have previously collaborated on the MS Helios, which holds the Guinness World Record for the largest solar panel installation on an inland vessel, the Blue Marlin goes a step further. Unlike the Helios, where solar power only served low-voltage onboard needs, the Blue Marlin’s system is fully integrated, directly powering the ship’s propulsion as well.

 This hybrid setup allows for automated energy management and peak shaving, reducing fuel use by preventing unnecessary generator starts during high-demand periods. With a fleet of over 350 vessels and annual freight volumes around 43 million tonnes, HGK Shipping is a major player in Europe’s inland transport sector. Their investment in renewable technology marks a significant shift in an industry under growing pressure to cut emissions and improve fuel efficiency.