Wavepiston will build a unique wave power plant in Barbados with a capacity of 50 MW, which does not yet exist anywhere in the world

Introduction

A little over thirty years ago, the Danish company Wavepiston created an innovative modular system capable of simultaneously converting ocean wave energy into electricity and producing drinking water from seawater. Only recently did the company sign a memorandum of understanding (MoU) with the Export Barbados agency (BIDC) to bring its designs to life in the world’s first commercial pilot project, 50 MW, on Barbadian territory.

Project Goals

The installation will not be purely experimental. Its purpose is to demonstrate the reliability, economic attractiveness, and durability of Wavepiston technology before large‑scale deployment. The project is part of Barbados’ strategy to achieve carbon neutrality by 2030, complementing existing solar, wind, and battery capacities.

How the System Works

Wavepiston consists of a long flexible “string” about 350 m in length secured at sea. Numerous underwater sail‑screens are attached to it, capturing wave energy. Each module contains an underwater “sail” that moves under the influence of waves and drives a hydraulic pump. The pump creates pressure in a continuous pipe carrying seawater to a central conversion station (onshore or offshore).

At this station the pressure is either used to spin a hydro turbine and generate electricity, or to power a reverse osmosis system that turns seawater into fresh water. Thanks to the natural asynchronous motion of the sails—sails threaded onto a common pipe—a steady pressurized flow of water is produced. The mutual cancellation of forces directed in opposite directions reduces load on the structure’s anchors and floats, making it simpler, lighter, and cheaper.

Technology Advantages

1. Modularity and scalability—from a few strings to large wave farms; all connect to a single conversion node. One station can service hundreds of chains in the ocean, generating substantial energy output.

2. Strength and reliability—the system withstands harsh marine conditions and has minimal environmental impact; tests even showed increased marine life around the installations.

3. Benefits for island nations—wave energy is more predictable and stable than solar or wind, which is especially important for Barbados, suffering from freshwater scarcity and fuel import dependence.

Regional Impact

The pilot project in Barbados will be a flagship for the Caribbean region and a “flagship” of wave energy. It will create jobs, enhance the island’s energy resilience, and demonstrate the possibility of combined power and water production. After successful implementation of the 50‑MW project, Wavepiston plans to move to full‑scale commercial deployment, which could greatly aid Barbados and attract attention from other island nations to this promising technology.