
The new Sanlorenzo 50Steel and SP110 received the ‘SEA Index®’ and ‘RINA Digital Yachting’ certifications, recognizing the shipyard’s ongoing commitment to technological innovation and environmental sustainability.
When last September Sanlorenzo arrived at the exclusive setting of Port Hercule for the Monaco Yacht Show 2024, the most prestigious international boat show dedicated to superyachts, it was one of the most awaited exhibitors in the whole yacht show, with an extraordinary presence of over 120 superyachts and megayachts on display, ranging from 25 to 100 meters in length.The Italian yachting maison presented two of its most revolutionary models: 50Steel, the world’s first superyacht to use the Reformer Fuel Cell system with green methanol for electricity generation, and SP110, an open coupe that perfectly combines Italian design with high- level performance, maximum attention to sustainability, and unique comfort.

Published in Superyacht Digest | Winter Issue 2024-2025 “The Superyacht Society”
50Steel, a 50-metre displacement superyacht with a steel hull and aluminium superstructure, perfectly embodies Sanlorenzo’s ability to lead innovation in the industry, embracing cutting-edge solutions in design, technology and sustainability. With 50Steel, the shipyard introduces a unique product to the market, a jewel of innovation that marks a milestone in the technological progress of the nautical industry, and reaches a new important milestone in the Maison’s path towards carbon neutrality. The exclusive agreement with Siemens Energy makes 50Steel the first superyacht in the world to use the Reformer Fuel Cell system powered by green methanol for electricity generation.

The totally carbon neutral system significantly increases the time spent at anchor without consuming diesel fuel, covering around 90% of a superyacht’s typical operating time in zero emissions, enabling a 20-30% reduction in emissions annually. Thanks to this revolutionary solution, 50Steel has received the SEA Index® certification, set up by the Yacht Club de Monaco and Credit Suisse in collaboration with Lloyd’s Register. The acknowledgement, designed to reward cutting-edge projects capable of charting a course for the entire nautical sector, is a system for assessing a vessel’s energy efficiency and environmental impact, measured by the CO2 emissions it produces.

But 50Steel’s innovations do not end with its commitment to sustainability. In fact, this superyacht introduces to the market another innovation destined to mark the history of the nautical industry, the Hidden Engine Room (HER) system. A revolutionary on-board concept patented by Sanlorenzo, the HER system envisages a new arrangement for the engine room: from the two levels usually occupied, there is now a horizontal development of the propulsion equipment and a new distribution of the technical area in the lower deck. This makes it possible to exploit new spaces in the lower deck, making room for a valuable area of additional living space, modifying the boat’s traditional layout.

The interior design is also developed in the name of innovation: the disruptive architecture is nevertheless imperceptible from the exterior profile, which maintains the clean and essential lines of Sanlorenzo style. Developed on five staggered decks, its layout reduces partitions and barriers, generating spaces with particularly airy volumes, open to the outside. Each deck is then articulated on two levels, a solution that goes beyond the classic vertical subdivision, developing the horizontal axis of the spaces with unusual plays of perspective and unexpected connections. The overall effect is of a vast single space which, thanks to the large glass surfaces, is in a constant dialogue with the sea. ∎