What is the Velettrica Project?
Velettrica is an innovative Italian startup born in 2021 from the dream of entrepreneur and sailor Roberto Baffigo, who experienced firsthand what it means to sail fully green. The mission? To develop highly energy-efficient propulsion systems powered mainly by renewable sources. At the heart of Velettrica’s technology lies a multifunction foldable propeller—not just for propulsion but also designed to recover maximum energy when the boat is moved by the force of the wind. This isn’t your typical marine tech; it’s based on a biomimetic approach, studying alternatives to commercial propulsion systems and aiming for the perfect balance with nature. Energy efficiency is the priority for every element of the propulsion system. Testing has been rigorous, carried out at the INM Towing Tank (C.N.R.) and the C-PED laboratory at ROMA TRE University’s Department of Civil Engineering, Computer Science, and Aeronautical Technologies. After successful trials with the Sail-Pod 25 kW for sailboats, Velettrica is setting sights on new sailing cargo ships and even the emerging sector of VTOL aircraft.
Main Benefits of the Velettrica Sail-Pod 25
The Sail-Pod 25 is a game-changer in electric propulsion for sailboats. Here’s what makes it stand out:
- High-efficiency electric propulsion and charging system tailored for sailboats
- Foldable and variable pitch propeller that adjusts with a single synchronized electronic movement
- Generates energy while sailing—yes, you create your own power from the breeze
- Super easy to install with no space taken inside the boat
- Pollution-free and maintenance-free operation
- Zero noise, vibration, and heat—pure sailing serenity
- Designed and constructed in Italy with aerospace-grade materials like pre-preg carbon fiber and Inconel
- Lightest electrical powertrain in its category, weighing only 108 kg
- Tested in collaboration with ROMA TRE University’s Center for Power Electronics and Drives (C-PED)
- Outstanding torque delivering a Sail-Pod ratio of static thrust to nominal power greater than 30 Kgf/kW, compared to traditional propellers barely reaching 10 Kgf/kW
Innovative Technology Behind the Propeller
The magic of Velettrica’s technology lies in its propeller design. The blades open and adjust pitch through a single synchronized electronic movement, folding back into a flower-shaped position that minimizes drag when not in use. Crafted from aerospace-grade pre-preg carbon fiber and Inconel superalloy gears, the propeller is both lightweight and incredibly durable. This design allows the entire propulsion system—except the battery—to be external to the hull, making installation a breeze and freeing up valuable interior space. Plus, no need for extra cooling systems like heat sinks or pumps, since the pod’s design naturally manages heat. It’s a sleek, smart solution that blends engineering excellence with practical usability.
Performance That Goes Beyond Expectations
Velettrica’s custom electric motor delivers incredible torque to the special propeller, enabling smooth sailing in all conditions. The Sail-Pod’s high thrust-to-power ratio means enhanced maneuverability and instant power to face weather emergencies. And here’s the kicker: while sailing, the system can generate energy, powering onboard services like air conditioning all night long—without the annoying noise or smell of a traditional generator. Tests on prototypes have shown promising recharging data normalized to the 25 kW Sail-Pod, proving that on a windy day, you can produce enough energy to keep your boat running comfortably and quietly.
Sustainability at the Core
Inspired by nature, the propeller blades move smoothly through water like the fins of a whale shark, minimizing turbulence and wasted energy. This technology brings us closer to nature, allowing sailors to live in harmony with the environment—just like in the old days, but with modern innovation. Every component is designed for maximum durability, reducing the need for replacements, lubricants, and pollutants. The propeller even has an anti-fouling ability and a self-cleaning function to maintain high efficiency over time. It’s a system built not just for performance but for a sustainable future.
Velettrica’s Impact on Sustainable Development Goals (SDGs)
- SDG 7: Affordable and Clean Energy – Promoting renewable energy use on boats
- SDG 9: Industry, Innovation, and Infrastructure – Developing cutting-edge propulsion technology
- SDG 12: Responsible Consumption and Production – Designing durable, low-maintenance systems
- SDG 13: Climate Action – Reducing emissions and pollution from marine vessels
- SDG 14: Life Below Water – Minimizing marine pollution and disturbance
Efficiency and Silence: A New Way to Sail
Why settle for less when a glider wing can reach 99% efficiency and a foil 90%, but traditional marine propellers lag behind? Velettrica’s biomimetic design loosens traditional constraints like engine rpm and material limits, achieving higher efficiency in both propulsion and regeneration. Tested at the Institute of Marine Engineering’s towing tank, the Sail-Pod maintains laminar flow and low turbulence across a wide range of conditions. This means less friction, less heat, and less noise—resulting in a more reliable, comfortable, and economical system over time. Imagine sailing quietly, with no vibrations or heat, and doubling your range by blending 50% wind and 50% electric power. The hybrid navigation potential is immense. Even when the breeze is light, the system uses a bit of battery energy to create apparent wind, keeping your sails full and your journey smooth. As the wind picks up, the propeller seamlessly switches to regeneration mode, recharging your batteries. It’s sailing in intimate connection with nature—quiet, efficient, and sustainable.
