Azimuthal Trackers for UK Floating Solar: Efficiency Claims and Design Limits

The latest research from the University of Exeter has unveiled that azimuthal trackers significantly enhance the performance of floating photovoltaic (FPV) systems, offering a promising solution to the UK's renewable energy challenges. This study, which evaluated single-axis tracking systems across 12 sites, indicates that these advanced systems can deliver substantial energy gains while minimizing costs, aligning with the nation’s net-zero ambitions.

Floating Photovoltaic Technology: An Overview

Floating photovoltaic systems, commonly known as FPV, involve the installation of solar panels on floating platforms on various bodies of water, including lakes, reservoirs, and industrial ponds. Furthermore, FPV systems reduce water evaporation, making them particularly advantageous in areas facing water scarcity.

Understanding Azimuthal Trackers

Azimuthal trackers are a type of single-axis tracking system that rotate solar panels horizontally around a north-south axis, allowing them to follow the sun's east-west trajectory. Unlike tilt trackers, which adjust elevation, azimuthal systems are especially suited for FPV applications due to their buoyancy, enabling easier rotation mechanisms.

Key Findings from the University of Exeter Study

The University of Exeter's recent study highlights that azimuthal trackers outperform both fixed and tilt-only systems in terms of energy production and cost-effectiveness. The study demonstrated that their ability to adjust to varying sunlight angles mitigates energy losses associated with low irradiance, which is a common issue in the UK's variable weather. This adaptability not only enhances energy output but also lowers the levelized cost of energy (LCOE), making azimuthal FPV systems a viable option for meeting the UK's renewable energy targets.

Benefits and Challenges of Using Trackers in FPV Systems

• Reduced Soiling: Proximity to water helps keep panels cleaner, reducing maintenance costs.
• Mechanical Efficiency: Buoyancy aids the mechanics of tracking systems, making them easier to operate.

Global Context and Future Implications

While FPV systems have seen widespread adoption in Asia, Europe, including the UK, has been slower to embrace this technology. However, studies like the one from Exeter are paving the way for greater acceptance and implementation. Future prospects include the integration of FPV with hydropower systems, which could further enhance sustainability and reduce costs.

Conclusion: A Path Forward for Renewable Energy

The findings from the University of Exeter underscore the the remaining evidence gap of azimuthal trackers in floating solar applications. By enhancing energy efficiency and reducing costs, these innovations not only contribute to the UK’s renewable energy goals but also provide a scalable solution to global energy challenges. As the industry continues to evolve, the focus on integrating advanced technologies like azimuthal tracking will be crucial in driving the transition to sustainable energy systems.