While the world focuses on wind and solar renewables, one company has quietly achieved something remarkable in open ocean hydro power. By deploying commercial-size tidal stream turbines across two continents and generating real power into national grids, Proteus Marine Renewables has proved that tidal energy is viable at scale and ready to commercialize.
The Proteus Marine Renewables team has been designing and innovating for over two decades to achieve one goal: make tidal energy simple, durable and affordable for real-world conditions. Their advanced seabed-mounted turbines work with the natural movement of the tides, capturing energy from both ebb and flood cycles through a three-bladed rotor. Because water is more than 800 times denser than air, tidal turbines can achieve comparable power output to wind systems using much smaller rotors. The tides also move in a predictable daily cycle, creating a dependable source of renewable energy that can provide a meaningful, secure and reliable contribution to the energy market mix.
Proteus’s AR-Series turbines sit fully submerged on the seabed at depths of more than 40 meters. Robust, low-impact and designed for 24/7 generation with minimal maintenance, these turbines operate in harmony with the marine environment with no visual impact on the seascape. The company’s newest and most powerful design, the AR3000, can generate three megawatts of electricity to grid, enough to power up to 3,000 homes. The first AR3000 turbines are scheduled for deployment in both France (2028) and Scotland (2030), marking the next phase of Proteus’s commercial rollout.
Proteus technology has already delivered more than 20 gigawatt-hours of clean electricity to national grids in the United Kingdom and Japan, confirming their position as the first company whose IP has generated electricity from tidal energy in six countries, with two MW-class units operating today at high availability. In February 2025, the company installed a 1.1-megawatt turbine in Japan’s Naru Strait, while an upgraded 1.5-megawatt unit continues to operate in Scotland as part of the MeyGen project. Both are generating electricity and delivering revenue, proving tidal energy works not just in concept but in practice.
With end-to-end capability from ocean to grid, spanning system design, manufacture, offshore construction, operations and maintenance, Proteus delivers integrated, long-term solutions that reduce risk and lower costs, helping accelerate the build out of marine renewable projects.
Proteus leads the tidal sector by backing their commercial roadmap with evidence. Their levelized cost of energy reduction pathway has been independently verified in a report commissioned by the European Investment Bank. With more than 300 million euros in next-stage key tidal power projects fast approaching, the company has earned market confidence and is moving toward large-scale deployment, bringing predictable, renewable power to more coastal locations worldwide.
Around 100 gigawatts of near-shore tidal stream capacity have been identified globally, including 15 gigawatts in Europe. In the United Kingdom, the Great British Energy initiative targets 100% clean power by 2030, supported by dedicated tidal incentives such as Feed-in Tariffs and Contracts for Difference. Tidal energy is emerging as a core contributor to future net-zero power systems. Proteus has proven that tidal energy is ready — what’s needed now is scale. Through collaboration across governments, investors and communities, we can build a global tidal energy market that delivers predictable, clean power and supporting local industry growth.
To learn more, visit www.proteusmr.com
