Certain environmental factors can have a significant impact on solar panel performance. Humidity, salt, and mist can cause corrosion, reduce energy output, and ultimately shorten the lifespan of your solar systems if not properly addressed.
Understanding how these conditions affect solar panel efficiency is essential for anyone working on solar projects in coastal, tropical, or humid areas. Whether you’re working in LATAM, North Africa, Southern Europe or other areas, ensure that your solar solution has all the equipment to handle these conditions. Why? So you can have higher performance, lower maintenance costs, and a longer return on investment (ROI).
In this article, we’ll explore the key technical factors to consider when selecting solar panels for projects in such climates. And just for you, we will showcase two real-world case studies: a rooftop installation in Tunisia and a large-scale installation in Italy. Additionally, we’ll discuss how these considerations are critical for industries like marine ports and shipping.
1. Humidity: The Silent Performance Threat
Humidity can accelerate the corrosion of metallic components, reduce electrical reliability, and lead to energy efficiency losses. Areas near coastal regions, tropical environments, and high-rainfall zones are particularly vulnerable to moisture-related issues.
Why Humidity Matters:
Increased Maintenance Costs: The more frequently the panels are exposed to humidity, the more likely they are to require regular inspections and maintenance.
Corrosion of Frames: High moisture levels can lead to rusting on aluminum frames, which weakens the structural integrity of solar panels.
Electrical Degradation: Moisture can seep into junction boxes, wiring, and connectors, causing electrical failures and power losses.
Case Study – Tunisia:
In Tunisia, Eco Green Energy completed an 850 kW rooftop solar project for the pharmaceutical industry in a coastal area with high humidity. The project was designed with weatherproof materials and advanced sealing technologies, such as IP65-rated junction boxes, which ensured that the system performed reliably despite the high moisture levels in the air.
Key Technical Takeaways for Humidity-Impacted Areas:
- Moisture-resistant sealing and anti-corrosion coatings ensure longevity.
- Choose IP-rated junction boxes and sealed wiring to protect electrical components.
- Opt for corrosion-resistant frames made of stainless steel or anodized aluminum for better performance.
One important factor to remember when choosing the components of your solar energy projects, no matter where you are located: installation matters as much as the components themselves. We recommend working with experienced installers and engineers to secure an installation that makes the best out of your system. Consequently this will also save you a ton of problems in the future. In the example of Tunisia, the success relied on all the players, Disway, Sater Solar and EGE.
Tunisia’s climate favors solar energy, however it also has its own unique elements you need to consider when developing a solar project.
2. Salt: Coastal Conditions and Corrosion Risks
Another major challenge in coastal and tropical areas is salt. What happens is that salt particles in the air can accumulate on the panel surface, causing significant corrosion. This salt-induced degradation can affect both the structural elements of the panel and its electrical components, ultimately reducing its efficiency and lifespan.
Why Salt Matters:
Electrical Damage: Salt deposits can also cause short circuits and other electrical failures.
Salt Mist Corrosion: Salt-laden air accelerates corrosion of metal parts, including frames and junction boxes.
Loss of Panel Efficiency: Salt buildup on the glass surface can obstruct sunlight, reducing the panel’s ability to capture energy.
Case Study – Italy:
In Italy, Eco Green Energy successfully implemented a 2 MW solar project in regions where salt exposure is a significant concern, among other factors. To mitigate the impact of salt, our PV modules are equipped with anti-salt coatings on the glass and frame, and of course utilize special glass that doesn’t crack. The entire installation used weather-sealed junction boxes to protect the electrical components from salt corrosion.
Key Technical Takeaways for Salt-Prone Areas:
- Salt-resistant coatings on glass and anodized aluminum frames help prevent degradation.
- Sealed electrical components and gasketed connectors minimize salt-induced failures.
- Modules with high-performance coatings that can prevent the buildup of salt on the panel surface.
3. Mist and Fog: Solar Panel Performance in Low-Light Conditions
Mist and fog can scatter sunlight, reducing the amount of energy generated, especially in the early morning and late afternoon. While this is less of an issue for areas that receive a high amount of direct sunlight, regions with frequent fog or morning mist can see a significant reduction in panel performance during these hours.
Why Mist and Fog Matter:
- Reduced Light Absorption: During periods of mist or fog, light intensity is lower, which can lead to underperformance in energy generation.
- Energy Efficiency: Panels must be designed to absorb more light, even in low light conditions, to maximize output throughout the day.
Key Technical Takeaways for Low-Light Areas:
- High-efficiency cells (e.g., TOPCon technology) improve performance under suboptimal conditions.
- Look for anti-glare glass that enhances light absorption, even in foggy or cloudy conditions.
- Optimizing panel orientation and tracking systems can help capture light when it’s available, even in low-light conditions.
4. Solar Panels for the Marine Industry and Ports
As the world moves toward a greener future, industries like marine shipping and ports are increasingly looking for ways to decarbonize and reduce their carbon footprint. Solar energy provides a sustainable solution for ports and maritime operations, especially in coastal regions where exposure to salt and humidity can impact the reliability of conventional power sources.
How Solar Panels Help the Marine Industry:
- Renewable Energy for Ports: Ports can install large-scale solar projects on rooftops, harbor structures, or floating solar arrays to reduce dependence on fossil fuels and lower operational costs.
- Remote and Off-Grid Solutions: Maritime operations and offshore platforms benefit from solar systems as they can be used for powering lights, communications, and other essential infrastructure in remote locations.
- Sustainable Shipping: Ships themselves are increasingly adopting solar power to supplement their energy needs, especially in low-speed cruising or for on-board electrical systems.
5. What to Consider When Purchasing Solar Panels for Extreme Climates
Selecting your PV modules for projects in humid, salt-laden, or misty conditions, consider the following technical features for optimal performance:
- Corrosion-Resistant Frames and Coatings: Look for panels with anti-corrosion materials like stainless steel or coated aluminum to withstand the effects of salt exposure.
- Sealed Electrical Components: Ensure electrical components, including junction boxes, wiring, and connectors, are weatherproof using high IP ratings (IP65 or higher).
- Use of High-Efficiency Cells: Choose panels that feature advanced cell technologies such as TOPCon, which offer better performance in low-light conditions.
- Warranty and Durability: Select panels with 25-year warranties that guarantee a low degradation rate over time, ensuring that your investment remains productive for years.
- Maintenance Considerations: Make sure the system is designed for low maintenance and that there is a plan for regular cleaning and monitoring of the panels to maintain peak performance.
Conclusion: A Long-Term Investment for PV Performance in Extreme Climates
Solar power is a reliable and sustainable energy source, but its success in extreme climates depends on selecting the right products. Panels that are designed with corrosion resistance, high efficiency, and sealing technology will provide better long-term performance.
Pay attention to the proper technical specifications, and you can maximize energy output, reduce maintenance costs, and protect your investment in solar energy projects for years.
Do you have a project in mind? Contact us to help you design it and bring it to life from start to finish: info@eco-greenenergy.com or subscribe to our LinkedIn Newsletter for more insights, industry news, and updates from Eco Green Energy.
