How to Choose the Right PV Mounting System?

There are mainly two types of materials used for PV (photovoltaic) mounting systems on the market: one is aluminum alloy mounts, and the other is steel mounts—such as stainless steel (304) and galvanized steel components (Q235 hot-dip galvanized). So how should we make a proper choice?

1. First, in terms of strength, steel performs better. The strength of aluminum alloy is roughly 70% that of steel. Therefore, for scenarios with large spans or in high-wind areas, steel mounts are superior to aluminum alloy ones.

2. Second, regarding deflection deformation: This has nothing to do with the material’s strength; it mainly depends on the profile’s shape, dimensions, and elastic modulus (an inherent parameter of the material). Under the same conditions, the deformation of aluminum alloy is about 3 times that of steel, while its weight is only around 35% of steel. However, for the same weight, the cost of aluminum alloy profiles is also about 3 times that of steel. Hence, in large-span and high-wind areas, steel is also more cost-effective than aluminum alloy.

3. Next, in terms of corrosion resistance: The main anti-corrosion method for steel is hot-dip galvanizing, which typically allows it to be used for over 20 years in ordinary environments. But in high-humidity, high-salinity environments (even seawater), the corrosion rate accelerates, requiring regular annual maintenance. For aluminum alloy, the anti-corrosion principle relies on anodization to form a dense oxide film, which provides excellent corrosion resistance. Moreover, the corrosion rate decreases over time. Therefore, in terms of corrosion resistance, aluminum alloy is far better than steel.

4. Then, considering cost: Generally, the cost of aluminum alloy mounts is about 1.3 to 1.5 times that of steel mounts. However, in small-span systems (e.g., those installed on color steel tile roofs), the cost difference between the two is relatively small. Additionally, aluminum alloy is much lighter, making it highly suitable for rooftop PV plants.

5. Finally, it is essential to select a PV mounting system manufacturer with reliable quality and service. A high-quality PV mounting production line not only helps manufacturers reduce production costs but also enables them to efficiently supply high-quality products—thereby allowing manufacturers to provide better services to customers. As a company dedicated to the manufacturing of intelligent PV mounting equipment for years, Boyue PV Technology Co., Ltd. has been committed to researching and developing new technologies. This ensures that every manufacturer using Jinbolida machinery can produce exquisite and durable mounts, giving customers confidence in their choices. Its high-quality after-sales service further ensures a hassle-free user experience for customers.

To sum up, when choosing a PV mounting system:

• Steel has high strength and minimal deflection deformation under load, making it suitable for large-scale PV plants or high-wind areas with high stress requirements.

• Aluminum alloy profiles are lightweight, aesthetically pleasing, and have better corrosion resistance. They are more effective for rooftop PV plants with load-bearing requirements or in highly corrosive environments (such as chemical plants).

Of course, after considering the above factors, selecting a high-quality manufacturer and reliable after-sales service are also crucial reference points for customers.