Floating ocean energy platform by Global OTEC

April 23, 2026

UK-based renewable energy innovator Global OTEC has successfully completed the offshore installation of what it describes as the world’s first dedicated floating platform for ocean thermal energy conversion (OTEC).

This milestone marks a significant step toward the commercialization of OTEC technology, particularly for tropical island regions seeking reliable and sustainable energy solutions.

What is Ocean Thermal Energy Conversion (OTEC)?

OTEC technology generates electricity by utilizing the natural temperature gradient between warm surface seawater and colder deep ocean water. This renewable energy method offers a consistent and predictable power source, especially in equatorial regions where ocean temperatures remain stable year-round.

While OTEC has previously been tested in small-scale, land-based facilities using existing deep-water intake systems, scaling the technology has been challenging. The primary limitation has been the extensive piping required to transport seawater, which increases costs and restricts system size.

Offshore deployment unlocks scalability

By moving OTEC systems offshore, Global OTEC aims to overcome these limitations. Offshore installations significantly reduce the need for long पाइप systems—cutting requirements by up to 80%—and enable larger, more efficient energy production systems suitable for island grids.

This advancement is particularly important for island communities, where energy demand is high and infrastructure constraints are common.

Reducing dependence on fossil fuels

Currently, most tropical island nations rely heavily on diesel and heavy fuel oil for electricity generation. This dependence leads to high energy costs and vulnerability to global fuel price fluctuations.

Global OTEC estimates that more than 25 gigawatts of existing fossil fuel capacity across tropical islands could eventually be replaced by OTEC-based renewable energy systems.

PLOTEC project completed in the Canary islands

The prototype platform was deployed at the Oceanic Platform of the Canary Islands (PLOCAN), located off the coast of Gran Canaria. This site provides ideal conditions for testing, with easy access to deep ocean water near shore.

The installation completes the €3.5 million EU-funded PLOTEC project, highlighted by the successful deployment of a vertical seawater intake riser—an essential component for offshore OTEC systems.

According to Global OTEC CEO Dan Grech, this achievement represents a pivotal moment for the industry.

“OTEC is transitioning from controlled testing environments into real-world applications,” Grech explained. “Offshore systems allow for modular scaling, transforming OTEC from a niche concept into a viable, large-scale renewable energy solution comparable to wind and solar.”

What’s next for Global OTEC?

Following this successful offshore validation, the company plans to deploy its first commercial OTEC Power Module in Hawaii. Additionally, Global OTEC is collaborating with engineering firm 2H Offshore Engineering to explore powering subsea infrastructure for offshore oil and gas operations.

Addressing the energy crisis in island nations

The timing of this development is critical. Small Island Developing States (SIDS) face ongoing energy challenges, spending over $1 billion annually on fossil fuel imports—accounting for nearly 80% of their total energy costs.

High electricity prices, driven by reliance on imported fuels, continue to strain these economies.

Although solar and wind energy have been introduced in some regions, their expansion is limited by land availability and difficult seabed conditions. Moreover, their intermittent nature requires costly energy storage systems.

OTEC: a reliable baseload renewable energy source

Unlike solar and wind, OTEC can provide continuous, 24/7 baseload power due to stable ocean temperatures in tropical regions. This makes it a highly promising solution for energy security and sustainability.

The International Renewable Energy Agency (IRENA) estimates that OTEC technology has the potential to generate up to 10,000 terawatt-hours (TWh) of electricity globally—highlighting its long-term impact on the renewable energy landscape.