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Visit Sialia 45 currently being finished in Poland, will be launched in autumn 2025. This 14-meter all-electric boat marks a new stage in the development of carbon-free yachting. With two 300 kW motors and several battery configurations, it aims to offer fast cruising without sacrificing autonomy. But beyond the announcement, this model raises technical and practical issues of direct interest to sailors.
Autonomy and performance in electric cruising
The question of range remains central to any electric sailing project. At 25 knots, the Sialia 45 boasts 55 miles of range with the standard 500 kWh pack, and up to 77 miles with an additional 200 kWh pack. For coastal sailors, this means a one-way trip between Monaco and Saint-Tropez, for example. To extend the range, a "range extender" - a biodiesel-powered generator (140 or 350 kW) - can extend the distance covered to 164 or 240 nautical miles. This combination shows that pure electric propulsion remains limited to fast, medium-distance sailing, while the genset offers a hybrid solution.
Cutting-edge carbon construction
The site selected a carbon/epoxy sandwich the result is an infusion process. Three distinct processes are used to reduce weight while guaranteeing rigidity and strength. This technological choice meets two imperatives: to compensate for the weight of the batteries and to improve speed. What's more, the sandwich core acts as an acoustic insulator, reducing noise and vibrations, a significant advantage for sailing comfort. For shipbuilders and naval engineers, however, the use of carbon in series production remains an economic challenge, due to its cost and demanding processing.
Three versions for three programs
The Sialia 45 will be available in three configurations: Runabout, Sport and Weekender . The former follows the spirit of open rapids with low windshields, the latter adopts a central console with integral windshield, while the Weekender features an enclosed air-conditioned wheelhouse, suitable for hot or cold zones. Below deck, the layout includes a cabin, a full bathroom and, depending on the version, a saloon or galley. This modularity means it can be used for a variety of purposes: day trips, sports outings or weekend cruises.
Maintenance and service life of electric motors
Another challenge is maintenance. Unlike combustion engines, the Sialia 45's electric motors require very little maintenance, limited to ten-yearly greasing. The batteries, guaranteed for five years and rated for 3,000 cycles, are the key to the system's durability. Although battery replacement remains a costly proposition, the possibility of evolving battery technologies and upgrading management systems means that they will last longer than conventional motors.
Durable materials and finishes
In addition to propulsion, Sialia Yachts also focuses on materials. The deck is covered in recycled cork, and several finishes incorporate recyclable elements. The aim is to reduce the carbon footprint over the entire life cycle of the vessel. For yachtsmen, this choice not only changes the aesthetics, but also influences thermal and acoustic comfort.
Conclusion
With the Sialia 45, electric yachting takes another step forward, combining performance, comfort and modularity. But beyond the figures, this model above all illustrates manufacturers' current dilemmas: real autonomy, the cost of advanced materials and the adaptation of recharging infrastructures, which today do not yet exist in ports.
