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Why Does The Solar Mounting System Rust After a Few Years? How to Choose Standard Materials for Solar Power Systems

 

Unlike electronic devices that can be placed in relatively stable environments, the solar mounting system must be directly exposed to sunlight, rain, humidity, dirt, and even chemical environments. Therefore, if not properly designed and if standard materials are not selected, the solar mounting system will rust after just a few years, leading to a series of serious consequences.

 

The solar mounting system plays a crucial role in the solar panel system 

1. Causes of Rapid Rusting in Solar Mounting Systems

Poor Quality Materials 

One of the most common causes of rust is the use of cheap, substandard materials. Many systems use regular steel or thinly galvanized steel to save initial costs. However, when the protective layer is not thick enough or uneven, the metal surface will quickly oxidize when exposed to air and humidity. 

Poor-quality materials directly affect the system's performance 

In a humid tropical climate like Vietnam, the corrosion process occurs significantly faster. High humidity year-round, combined with heavy rain and polluted environments, causes poor-quality solar mounting systems to degrade after only 2–3 years of use.

Substandard Protective Coating 

Not all galvanized steel has the same corrosion resistance. The major difference lies in the galvanizing technology and coating thickness. Electro-galvanized steel often has a thin coating that easily peels off over time. Conversely, hot-dip galvanized steel has a thicker, more firmly adhered coating, providing better protection. 

The mounting system rusts severely when the protective coating is substandard

If the coating is substandard, areas such as cut edges, drilled holes, or connection points will become the starting points for the rusting process. Over time, this phenomenon spreads and weakens the entire structure of the solar mounting system.

Incompatibility with the Installation Environment 

The installation environment is a crucial but often overlooked factor. Coastal areas with high salt concentrations in the air, or manufacturing plants with chemicals, accelerate metal corrosion. 

Using materials unsuitable for the installation environment leads to severe rusting 

If materials unsuitable for the environmental conditions are used, the solar mounting system will lack sufficient resistance. This is why many systems rust prematurely despite being installed with correct techniques.

Errors During the Installation Process 

Incorrect installation techniques also contribute to an increased risk of rust. Drilling the roof without thorough waterproofing can create water stagnation points an ideal environment for the corrosion process. Furthermore, combining different types of metals without an isolation layer will cause galvanic corrosion. 

Using materials unsuitable for the installation environment leads to severe rusting

 

These errors are often difficult to detect initially but will silently reduce the lifespan of the solar mounting system over time.

2. Consequences of a Rusted Solar Mounting System

Rust not only affects the surface but also directly impacts structural durability. When the solar mounting system is weakened, its load-bearing capacity decreases significantly, especially under extreme weather conditions like high winds or storms. In addition, maintenance and replacement costs increase substantially. Repairing or replacing the solar mounting system is not only expensive but also disrupts the operation of the entire system. More importantly, investment efficiency will decline, diminishing the economic benefits that solar power provides.

3. How to Choose Standard Materials for Solar Panel Mounting Systems

Prioritize AL6005-T6 Aluminum Alloy 

AL6005-T6 aluminum is a widely used material in high-end solar mounting systems due to its outstanding corrosion resistance. Unlike steel, aluminum does not rust through standard mechanisms, helping to maintain long-term durability. Besides, aluminum is lightweight, reducing the load on the roof and making installation easy. The aluminum surface is often anodized, creating a protective layer that enhances resistance in harsh environments like coastal or industrial areas.

Ensure Standards When Using Steel 

In cases where steel must be used to increase load-bearing capacity, it is essential to choose hot-dip galvanized steel with a sufficiently thick coating (≥ 65–80 µm) that meets international standards. Additionally, the product must have clear quality certifications to ensure long-term durability.

Choosing Reputable Manufacturer ‘Holcom’

A quality solar mounting system depends not only on the materials but also on the design and the supplier. Calculating wind loads and selecting solutions suitable for each roof type and environment will optimize durability and mitigate risks. Holcom provides comprehensive solutions for each design, helping the system operate stably throughout its life cycle.

Holcom is a leading provider of a diverse range of top-quality solar mounting system solutions 

If you are looking for a sustainable - corrosion-resistant - long-term cost-optimized solar panel mounting system solution, Holcom is a reliable choice. Holcom provides high-quality solar mounting systems designed to suit the climate and environmental conditions in Vietnam. Our products not only ensure technical standards but also help extend the system's lifespan and optimize investment efficiency. 

✨ Contact Holcom today for consultation on suitable solutions and to receive a detailed quote for your project!

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 HOLCOM VIỆT NAM CO.,LTD

  • Hotline: 0963 805 566

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