Scalable low-cost clean energy from the ocean

SAILWINT produces and delivers cheap, clean and resilient hydrogen at scale with autonomous wind turbine ships sailing offshore seas

Supported and funded by
Supported and funded by
Supported and funded by

Mission

SAILWINT creates a new era: the era of sailing wind turbine ships, unlocking the vast, untapped energy of the oceans. We deliver low-cost and clean power to fuel thriving economies and societies. Our mission is to make clean energy at scale affordable, socially acceptable and resilient to achieve energy sovereignty and to overcome the fossil fuel age.

Read more about SAILWINT in this Techstars DeepTech Berlin founder's spotlight.

Advantages


Advantages

SAILWINT's unique combination of advantages make it a truly disruptive innovation

Low-cost

Far-offshore winds are stronger and steadier providing an energy yield upside of 20-30% plus additional 10% upside given no wake loss/wind shadow effects compared to current offshore wind farms. No electricity grid connections provide massive CAPEX savings and the mobile approach reduces O&M OPEX. Levelized cost of energy (LCOE) is 50% lower than floating offshore and 30% lower than fixed-bottom offshore wind.

Low-cost

Far-offshore winds are stronger and steadier providing an energy yield upside of 20-30% plus additional 10% upside given no wake loss/wind shadow effects compared to current offshore wind farms. No electricity grid connections provide massive CAPEX savings and the mobile approach reduces O&M OPEX. Levelized cost of energy (LCOE) is 50% lower than floating offshore and 30% lower than fixed-bottom offshore wind.

Clean

SAILWINT's energy source is the wind that blows. Renewable energy from the ocean. Pure clean hydrogen as the output. No stationary impact on coastal environments. SAILWINT ships come and go and can be smartly routed to protect sensitive ecosystems.

Clean

SAILWINT's energy source is the wind that blows. Renewable energy from the ocean. Pure clean hydrogen as the output. No stationary impact on coastal environments. SAILWINT ships come and go and can be smartly routed to protect sensitive ecosystems.

Scalable

On the open sea space is practically unlimited. No long siting and permitting limits SAILWINT's scale-up. SAILWINT's mobile approach allows for flexible deployment. 10 fleets of aorund 100 scaled-up SAILWINT ships produce and deliver energy equivalent to e.g. 25% of German gas power plant capacity.

Scalable

On the open sea space is practically unlimited. No long siting and permitting limits SAILWINT's scale-up. SAILWINT's mobile approach allows for flexible deployment. 10 fleets of aorund 100 scaled-up SAILWINT ships produce and deliver energy equivalent to e.g. 25% of German gas power plant capacity.

Resilient

Most countries are energy dependent. E.g. the EU needs to import more than 60% of its energy demand. SAILWINT enables us to produce our energy much more locally at the seas close to our economic centers. This eliminates geo-strategic dependencies and conflicts and provides a path to energy sovereignty.

Resilient

Most countries are energy dependent. E.g. the EU needs to import more than 60% of its energy demand. SAILWINT enables us to produce our energy much more locally at the seas close to our economic centers. This eliminates geo-strategic dependencies and conflicts and provides a path to energy sovereignty.

Socially acceptable

SAILWINT ships sail on the ocean, out of sight and out of conflict with fishery, tourism and environmental protection. Individual wind turbines are beautiful. But more and more communities resist to become surrounded by them. Our future energy supply should not solve one problem and create another. True innovation creates meaningful and inclusive change that resonates.

Socially acceptable

SAILWINT ships sail on the ocean, out of sight and out of conflict with fishery, tourism and environmental protection. Individual wind turbines are beautiful. But more and more communities resist to become surrounded by them. Our future energy supply should not solve one problem and create another. True innovation creates meaningful and inclusive change that resonates.

Proven technologies

SAILWINT's impact is ambitious, but its technology is straightforward. Our patented solution builds on industry-proven, market-available wind turbine technology, state-of-the-art battery and hydrogen systems, and maritime hydrogen pipelines for energy offloading, which are already under construction. This foundation enables SAILWINT's fast scaling journey.

Proven technologies

SAILWINT's impact is ambitious, but its technology is straightforward. Our patented solution builds on industry-proven, market-available wind turbine technology, state-of-the-art battery systems, and maritime hydrogen pipelines for energy offloading, which are already under construction. This foundation makes SAILWINT's scaling journey still ambitious but manageable and achievable.

Proven technologies

SAILWINT's impact is ambitious, but its technology is straightforward. Our patented solution builds on industry-proven, market-available wind turbine technology, state-of-the-art battery and hydrogen systems, and maritime hydrogen pipelines for energy offloading, which are already under construction. This foundation enables SAILWINT's fast scaling journey.


Technology




Technology

SAILWINT builds on industry-proven, market-available technologies, integrating and extending them in a unique and innovative way. These innovations are filed under international patents, making SAILWINT cutting edge.

Wind turbines

Batteries

Electrolyzer

Hydrogen storage

Sailing mechanism

Energy offloading

AI-steering and fleet operations

Wind turbines

Market-available, industry-proven wind turbines are sourced and integrated into the SAILWINT ships to generate clean electricity from the kinetic energy of strong and steady far-offshore winds

Pilots

SAILWINT has built an operational prototype and successfully launched a pilot campaign on the offshore North Sea between Cuxhaven and Helgoland with the Fraunhofer Institute in December 2024.

The next scaled-up iteration is currently under development. SAILWINT has secured a federal grant to build the next generation of energy-producing sailing wind turbine ships and launch pilots on the North- and Baltic Sea with our partners.

In November 2025, SAILWINT has launched its new scaled-up version with a pilot on the Baltic Sea near Rostock/Warnemünde and demonstrated sailing propulsion with simultaneous energy generation, including sailing courses on a beam reach, broad reach and upwind tacking.

The new 5.5 meter version can generate up to 3 kW power (at 14 m/s wind speed), stored in onboard batteries and >400N thrust with sailing speeds up to 10 - 16 km/h (based on automated wind turbine steering), that can be further accelerated by twin electric underwater thrusters with 2 × 1000 W for special maneuvers.

Read more about the Baltic Sea pilot in this news article from the Ministry of Economy and Energy.


The new 5.5 meter version can generate up to 3 kW power (at 14 m/s wind speed), stored in onboard batteries and >400N thrust with sailing speeds up to 10 - 16 km/h (based on automated wind turbine steering), that can be further accelerated by twin electric underwater thrusters with 2 × 1000 W for special maneuvers.

Read about the Baltic Sea pilot in this news article from the Ministry of Economy and Energy.


In January 2026, we have piloted the new version in the middle of the German North Sea between Cuxhaven and Helgoland.  It was cold, snowy, and challenging with many insights and learnings and some key achievements:

Our 5.5 m prototype trimaran, the superstructure and wind turbine system demonstrated seaworthiness with regard to stability and strength in waves up to 1.8 m height. Each wind turbine can generate up to 1.5 kW power at wind speeds of 14 m/s. We had 10 - 12 m/s and crossed the 1 kW mark charging the battery (see raw data in the video).

Thanks to the Fraunhofer Institute IFAM that supported our pilot with the research vessel Joseph von Fraunhofer.

Read more about the North Sea pilot in this news article from the Ministry of Economy and Energy.


In January 2026, we have piloted the new version in the middle of the German North Sea between Cuxhaven and Helgoland.  It was cold, snowy, and challenging with many insights and learnings and some key achievements:

Our 5.5 m prototype trimaran, the superstructure and wind turbine system demonstrated seaworthiness with regard to stability and strength in waves up to 1.8 m height. Each wind turbine can generate up to 1.5 kW power at wind speeds of 14 m/s. We had 10 - 12 m/s and crossed the 1 kW mark charging the battery (see raw data in the video).

Thanks to the Fraunhofer Institute IFAM that supported our pilot with the research vessel Joseph von Fraunhofer.

Read about the North Sea pilot in this news article from the Ministry of Economy and Energy.


To discover our pilot program and collaboration opportunities contact: pilots@sailwint.com. SAILWINT is collaborating with industry, research and dual-use partners in pilot projects in the following areas:

Seabed mapping and inspection

Uncrewed surface vehicle enabling long-endurance seabed mapping and inspection for offshore windfarm and asset developers and operators

Offshore exploration energy supply

Sub-scale offshore energy supply for maritime resource exploration - up to 5 KW independent electric power supply

Seaborne surveillance drone

Seaborne drone for long-endurance surveillance missions and further use cases – SAILWINT offers the unique advantage of autarkic power supply

Maritime research USV

Uncrewed surface vehicle for long-endurance meteorological and oceanographic research missions -SAILWINT provides the platform and power supply



Careers


Careers

There are currently no open positions.

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