Firm coastal clean power for AI hyperscale data centers
Turnwater is a wave energy converter that doubles as a floating breakwater. Each module generates firm clean electricity while creating a calm-water zone for seawater cooling and coastal protection. One device, two jobs, built entirely with proven marine components.
Background: real Turnwater test footage
The power problem facing AI
The IEA projects global data center electricity use will roughly double to about 945 TWh by 2030, with AI as the major driver. Hyperscalers need large blocks of reliable clean power faster than transmission expansion or new thermal generation can deliver, and they increasingly need it at the coast, where cooling, connectivity and land converge. Turnwater is designed for exactly that load.
One platform, two jobs
A partially submerged floating breakwater with an Iribarren-angled hull. Incoming waves create a pressure differential that drives 24 bidirectional axial-impulse turbines inside the hull. The energy taken out of the sea becomes electricity; what remains behind the module is calm water.
Wave energy is steadier and more predictable than wind or solar. Paired with battery and hydrogen storage, Turnwater parks can be shaped toward 24/7 carbon-free energy for hyperscale campuses.
The same module shields what sits behind it: ports, fleets, shoreline infrastructure and the data center's seawater cooling intake. Community co-benefits become a permitting advantage.
From ocean to rack
Coastal siting lets data centers cool with seawater instead of freshwater. Google's Hamina, Finland campus proves the model:
versus an industry average of ~57%
Turnwater generates, transmits and stores in DC, eliminating transformer dependency and delivering a simpler, more direct power path from ocean to rack, matched to how modern AI campuses are built.
Why coastal wave
| Source | 24/7 firm | Near load | Build speed |
|---|---|---|---|
| Turnwater | Yes, with storage | At the coast | Fast, modular |
| Offshore wind | No | Far offshore | Slow |
| Solar + battery | Costly to firm | Needs land | Fast |
| Nuclear | Yes | Siting-limited | 10+ years |
Wave resource above ~20 kW/m is commercially attractive for utility-scale converters. Prime U.S. sites include the Oregon and Northern California shelf and the Washington coast at 35 to 40 kW/m.
De-risking roadmap
Every tranche is added only when the previous gate is passed and contracted offtake supports the next step.
Completed
Six numerical and tank test campaigns confirmed up to 95% wave attenuation, mooring stability and turbine performance.
Now · pilot round
Scaled and full-size module tests in real ocean conditions to prove output and survivability.
Next
Four 60 m units, grid-connected, serving a first coastal offtaker.
Target ~2030
Approximately 180 modules along a 10 to 15 km line, with storage, powering hyperscale AI load.
Consortium & IP
All core components, turbines, generators, moorings and concrete hulls, are commercially available, class-certified marine technologies. Turnwater combines them in a novel configuration: integration risk, not science risk.
granted patents
protecting the hull geometry and energy capture configuration.
One page covering the platform, the DC architecture, seawater cooling, prime U.S. sites and the commercial model.
What we're looking for
We are seeking U.S. hyperscalers, data center developers, utilities and infrastructure investors to co-develop a first coastal wave power park. The ideal partner brings siting, offtake, interconnection and project finance capability. We bring the Turnwater technology, the engineering consortium and a staged validation plan.
Astrid Gil-Casares
Co-founder · Investor relations & business development
astridgilcasares@turnwater.ai +34 619 360 969