As countries accelerate the transition toward renewable energy, one challenge continues to dominate discussions across the energy industry: reliability. While solar and wind power have expanded rapidly, both remain intermittent energy sources dependent on weather conditions and storage infrastructure. Grid operators are increasingly looking for renewable technologies capable of delivering predictable and stable power generation to complement existing energy systems. UK based clean energy company Caudal Energy believes tidal power could become a critical part of that solution, and the company has now secured new funding to accelerate development of its next generation marine energy technology.
Caudal Energy has raised £4.3 million in funding led by Oxford Science Enterprises and Empirical Ventures.
The round also included participation from investors including Zero Carbon Capital and Creator Fund.
According to the company, the funding represents one of the most significant recent institutional venture investments into tidal energy within the United Kingdom.
Rethinking Tidal Energy From First Principles
Founded in 2024 as Porpoise Power, Caudal Energy was built around hydrodynamic research developed by co founder Adrian Thomas at the University of Oxford.
Instead of relying on conventional underwater turbine systems, the company has developed a proprietary oscillating foil platform inspired by the movement of marine mammal tails and caudal fins.
The system is designed to work with tidal flows rather than against them, creating what the company believes is a simpler and more commercially scalable approach to marine energy generation.
Caudal Energy says its modular architecture simplifies installation, reduces maintenance requirements, and lowers operational complexity compared with traditional turbine based tidal systems.
Unlocking Mid Flow Tidal Locations
Historically, tidal energy deployment has remained limited because most turbine systems require extreme tidal conditions with flows exceeding five knots to operate economically.
This has restricted viable deployment to a relatively small number of coastal locations globally.
Caudal Energy’s fin based system is designed to operate efficiently in mid flow tidal environments with flows above three knots.
According to the company, this significantly expands the number of viable deployment sites for tidal energy generation.
The company believes this broader deployment capability could unlock applications across utility scale energy generation, industrial infrastructure, and distributed power systems.
Predictable Renewable Power
Unlike wind and solar generation, tidal energy offers highly predictable output based on natural tidal cycles.
As electricity grids become increasingly dependent on intermittent renewable generation, predictable baseload energy sources are becoming more strategically valuable.
John Kennedy said the future energy system requires renewable technologies capable not only of producing clean power but also delivering dependable and scalable energy generation.
According to Kennedy, Caudal’s combination of hydrodynamic design and modular deployment architecture is intended to create commercially practical tidal systems capable of operating competitively with more established renewable technologies.
Advancing Toward Commercial Deployment
The company’s technology has already reached Technology Readiness Level 5, and the newly secured funding will support full scale testing at Strangford Lough in Northern Ireland.
Caudal Energy is targeting its first commercial deployment by 2028 as it progresses toward Technology Readiness Level 8.
The funding will also support expansion of the company’s engineering and modelling capabilities while accelerating demonstration projects and commercial partnerships across utility, industrial, and distributed energy markets.
Expanding the Future of Marine Energy
Andy Straiton said Caudal Energy is addressing one of the most important challenges facing renewable infrastructure: delivering scalable and predictable generation that complements intermittent power sources such as wind and solar.
Meanwhile, Johnathan Matlock noted that grid operators are increasingly placing economic value on predictability within renewable energy systems.
As global energy systems continue evolving toward lower carbon infrastructure, technologies capable of delivering stable renewable power without large scale storage requirements are attracting growing investor attention.
Caudal Energy is positioning itself within that transition by developing a new generation of tidal power systems designed to make marine energy more scalable, commercially viable, and geographically accessible than previous tidal technologies.