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Post by As the global rooftop solar market continues to grow, residential, commercial, and industrial buildings are placing increasingly higher demands on solar mounting systems. In addition to securely fixing PV modules, a rooftop solar mounting system must also deliver structural strength, corrosion resistance, roof compatibility, installation efficiency, and overall project cost-effectiveness.
To meet the installation requirements of solar projects across different roof structures and global markets, SOEASY has developed the EasyFlex Roof Solar Mounting System. Designed for residential, commercial, and industrial solar PV projects worldwide, this solar roof mounting system combines Zn-Al-Mg (Zinc-Aluminum-Magnesium) alloy steel (S350GD) with aluminum alloy (AL6005-T6).
Furthermore, C-shaped steel rails, pre-assembled connection components, and electrical bonding components work together to form a complete rooftop PV mounting system. The product manual positions it as an innovative mounting solution.
Therefore, this article provides a detailed introduction to the EasyFlex Roof Solar Mounting System, covering its system structure, components, materials, installation logic, quantity calculation, and applicable conditions.
1. Zn-Al-Mg: Why Is It a Better Choice for Solar Mounting Systems?
Traditional solar mounting systems are commonly made of aluminum profiles or hot-dip galvanized steel. However, the EasyFlex system introduces Zn-Al-Mg (Zinc-Aluminum-Magnesium) alloy steel (S350GD).
In addition, the system combines Zn-Al-Mg steel with aluminum alloy (AL6005-T6) and SUS304 stainless steel. As a result, it delivers enhanced overall material performance.
A Revolutionary Improvement in Corrosion Resistance
Zn-Al-Mg material has a unique self-healing property at cut edges. When the material surface is cut or scratched, the exposed steel substrate is vulnerable to the corrosive environment.
In this situation, magnesium (Mg) in the coating preferentially dissolves and migrates toward the damaged area. Then, it reacts with zinc (Zn) and aluminum (Al) to form a dense composite protective film, commonly known as white rust.
As a result, this protective layer isolates the corrosive medium from the steel substrate and helps prevent further corrosion.
4,000-Hour Neutral Salt Spray Test
In corrosion-resistance testing, a ZM275 coating, with a coating weight of 275 g/m², can withstand a 4,000-hour neutral salt spray test.
Furthermore, its corrosion resistance is more than 3 to 10 times higher than that of a pure zinc coating with the same coating weight. Therefore, the system provides a service life warranty of up to 30 years.
Superior Mechanical Performance
The tensile strength of Zn-Al-Mg material (S350GD) is 1.6 times that of aluminum. Likewise, its specified non-proportional proof strength is also 1.6 times that of aluminum.
Meanwhile, the 20 × 40 × 1.2 mm C-shaped steel rail provides strength comparable to a traditional F42P rail. Therefore, its mechanical performance is significantly higher than that of aluminum profiles.
Significant Cost Advantage
Under the same design conditions, the EasyFlex system can achieve more than 30% cost savings compared with aluminum alloy solutions.
At the same time, it adds only approximately 0.4 kg per square meter compared with an aluminum solution. As a result, the impact on the roof’s structural load is minimal.
2. Broad Roof Compatibility and Rigorous Technical Specifications
The EasyFlex Roof Solar Mounting System offers a high degree of versatility and compatibility. Therefore, it can be used for the vast majority of distributed rooftop PV applications.
2.1 Comprehensive Coverage of Rooftop Applications
The EasyFlex metal roof solar mounting system can accommodate various types of metal roofs.
Standing Seam, Interlocking, and Concealed-Fastener Metal Roofs
For standing seam, interlocking, and concealed-fastener metal roofs, the system uses non-penetrating clamps, such as the SE01 clamp.
These clamps securely grip the roof seam without drilling into the roof. Therefore, the installation avoids roof penetration and eliminates the associated risk of water leakage.
Trapezoidal and Klip-Lok Metal Roofs
For trapezoidal and Klip-Lok metal roofs, the system uses highly adaptable L-feet or bolts to penetrate and secure the mounting structure to the underlying steel beams.
In addition, EPDM sealing washers and waterproof caps are provided. As a result, the system ensures reliable waterproofing.
Clay Tile, Concrete Tile, and Pitched Roofs
For clay tile, concrete tile, and pitched roofs, dedicated roof hooks or conversion bases provide secure fixation.
At the same time, these components allow the mounting structure to be securely installed without damaging the original roof tile structure.
2.2 Robust Technical Specifications and Authoritative Certifications
To ensure the safety of PV installations under extreme weather conditions, the EasyFlex solar mounting system has undergone rigorous structural analysis and testing.
Wind and Snow Load Performance
First, the maximum wind resistance reaches up to 60 m/s, equivalent to approximately 17 Beaufort.
In addition, the maximum snow load reaches up to 1.5 kN/m².
Therefore, the EasyFlex system can meet demanding structural requirements for rooftop PV applications in challenging weather conditions.
PV Module Compatibility
The EasyFlex Roof Solar Mounting System is fully compatible with various types and specifications of crystalline silicon and thin-film PV modules.
As a result, it can support different PV module configurations across residential, commercial, and industrial projects.
International Standards and Warranty
Furthermore, the design and structural calculations strictly follow multiple international standards and codes.
These include:
- JIS C 8955:2017 (Japan)
- AS/NZS 1170 (Australia/New Zealand)
- DIN 1055 (Germany)
- ASCE/SEI 7-05 (USA)
- IBC 2009 (International Building Code)
In addition, SOEASY provides a 15-year limited warranty. Therefore, the system helps safeguard the long-term investment value of solar projects.
3. Solar Mounting System Components and a 1 × 10 Array Quantity Calculation Example
The EasyFlex Roof Solar Mounting System features a highly modular structural design.
To provide a clearer understanding of the solar mounting system BOM and quantity calculation, we use a standard 1 × 10 array as an example.
1 × 10 Array Configuration
Specifically, this configuration consists of 1 row and 10 columns, with 10 PV modules arranged continuously in a horizontal orientation (Approximately 5.5 kW).
The following table shows the main solar mounting system components, their quantities, and their functions.
| Component | Quantity / Specification | Function and Design Highlights |
|---|---|---|
| ZM275 Zn-Al-Mg C-shaped steel rail | 2 × 2200 mm rails + 4 × 4800 mm rails | Made of high-strength, corrosion-resistant Zn-Al-Mg steel, the rails support the entire row of PV modules. |
| C-shaped steel equal-strength rail connector kit | 4 kits | Specifically designed for 20 × 40 C-shaped steel, the 200 mm connector joins rail sections while maintaining strength approximately equivalent to that of the main rail. |
| Pre-assembled C15 mid clamp kit | 18 kits | Used to secure the 9 gaps between 10 PV modules (9 × 2 = 18). Includes a C10 hook and supports insertion at any point along the rail. |
| Pre-assembled C15 end clamp kit | 4 kits | Used to secure the outer edges of the 10-module array, with two clamps required at each end (2 × 2 = 4). |
| SUS304 stainless steel C10 bonding plate | 18 pcs | Paired 1:1 with the mid clamps to penetrate the anodized layer of the module frames, creating equipotential bonding across the entire array for lightning protection and electrical grounding. |
| Roof attachment components (selected according to the actual application) | L-foot kits: 12 kits OR clamp kits: 13 kits | Trapezoidal metal roof: 12 L-foot kits, including waterproof washers and ST6.3 screws. Standing seam metal roof: 13 SE01 non-penetrating clamp kits. |
| EU electrical grounding kit | 2 kits | Installed at the ends of the rails, with a recommended tightening torque of 4 N·m, and connected to the main grounding conductor. |
Important Note: Rules for Adjusting the Quantity of Clamps and L-Foot Kits
The 12 L-foot kits or 13 clamp kits shown in the table are based on a standard quantity calculated for a common roof purlin span of approximately 1.0–1.2 m.
However, in actual projects, the number of roof attachment kits will be dynamically adjusted according to the on-site purlin spacing, local wind pressure, and snow load conditions.
For example, a smaller purlin span requires a higher density of fixing points. Likewise, higher wind and snow loads require additional fixing points.
Therefore, the quantity of clamps or L-foot kits should be determined according to the actual project conditions. This adjustment helps ensure the structural safety of the solar roof mounting system.
4. A Reliable Zn-Al-Mg Rooftop Mounting Solution for Diverse PV Applications
The EasyFlex Roof Solar Mounting System is built around Zn-Al-Mg material.
In particular, it delivers strong performance in three key areas: corrosion resistance, mechanical strength, and cost control.
Furthermore, its broad roof compatibility, simplified installation process, and compliance with authoritative international standards make it an ideal choice for residential, commercial, and industrial PV projects.
Suitable for Challenging Rooftop Environments
Whether dealing with harsh environments featuring high wind pressure and heavy snow loads, the EasyFlex system provides a reliable mounting solution.
At the same time, it can serve projects seeking a cost-effective alternative solution amid international trade barriers.
Therefore, the EasyFlex solar mounting system provides a compelling option for different rooftop PV applications.
A Cost-Effective Alternative for Solar Projects
With more than 30% cost savings, a corrosion-resistant service life of up to 30 years, and robust structural performance, EasyFlex brings a new choice to the solar mounting industry.
In other words, EasyFlex combines material performance, structural reliability, roof compatibility, and cost efficiency in one rooftop solar mounting system.
