A new floating solar energy project installed in a bay in Taiwan managed to produce 12% more electricity than an equivalent land-based plant.
Moreover, despite higher maintenance and operation costs, the net profitability was superior, confirming that this technology can be competitive against traditional systems.
Technical advantages of the system
Solar panels lose efficiency when they overheat. In the Taiwanese case, the water and air currents over the marine surface provide natural cooling, allowing the modules to work in more stable conditions and for more hours a day.
- Higher thermal efficiency: cooler temperatures reduce overheating.
- Constant production: the marine environment offers natural ventilation.
- Direct comparison: compared to the reference land-based plant, the performance was significantly superior.
Challenges of marine solar energy
The installation faces more aggressive conditions than on land:
- Saline humidity and corrosion.
- Waves and storms.
- Seabird droppings.
- Impact from logs and floating debris.
All this requires designing more resistant structures and performing frequent cleanings. According to researchers, building a solar plant at sea can cost 30% more than doing it on land, although the additional production compensates for much of those expenses over its useful life.
Regional and global context
The lack of space in densely populated countries like Taiwan, Japan, and South Korea drives the expansion of floating solar projects.
In Europe, the Netherlands and Germany are experimenting with marine platforms capable of withstanding waves up to 10 meters high. Although some systems have failed due to technical problems, the trend points to sustained growth.
Combination with offshore wind energy
The energy industry has already deployed thousands of wind turbines at sea. The integration of floating solar and offshore wind would allow stabilizing renewable production:
- When the wind decreases, there is usually solar radiation.
- When the sun diminishes, the wind can maintain generation.
This hybrid model offers greater energy security and efficiency.
Implications for islands and coastal cities
Taiwan, highly dependent on energy imports, sees this technology as a strategic solution. Other island countries like Indonesia, the Philippines, and Caribbean regions could benefit by reducing their diesel dependency.
Likewise, industrialized coastal cities consider these platforms as a way to produce electricity near consumption centers without occupying more territory.
Future challenges
Marine floating solar energy is still in its early stages. The main challenges are:
- Improving material resistance against corrosion and waves.
- Reducing installation and maintenance costs.
- Minimizing impacts on marine ecosystems.
Technological innovation will be decisive: anti-corrosion coatings, flexible structures, and intelligent maintenance systems could transform the economic viability of the sector.
The Taiwanese project demonstrates that marine floating solar energy can be more efficient and profitable than land-based, opening new opportunities for the global energy transition. Although it will not solve the climate crisis on its own, it does expand the useful space for producing renewable electricity and offers strategic solutions for islands and coastal cities.
