It would be incredibly beneficial for EPC (Engineering, Procurement, and Construction) companies facing issues with insurers to review this content. Below, I will provide a quick analysis of a recent photovoltaic project, highlighting common mistakes in installations that can be easily avoided.
Key Insights from the Project
1. Choice of Structure
Analysis: Correct. Despite the module being self-supporting and anchored at the corners, with a configuration of 120 half-cells (60 cells), it does not suffer from mechanical stress due to its size, glass thickness, and frame thickness. Moreover, the manufacturer guarantees that it can withstand 6500 Pa in this position.
Conclusion: Check ✅
2. Placement of the Structure
Analysis: Correct. The design allows for maintenance pathways, enabling access to any module on the roof without needing to remove them or step on them.
Clarification: Contrary to the myth that “the panels can be stepped on, they won’t break,” this is misleading.
Conclusion: Check ✅
However, it is incorrect regarding the use of ballast. The weights used for stabilization are not fixed in any way. Unanchored structures can move—like a worm.
Conclusion: No Check ❌
3. Wiring
Analysis: Perfect ✅. Not a single wire is visible, nor are any cables left strewn across the roof. Many installations I’ve seen, especially with east-west and coplanar setups, often have wires left lying on the roof, with the excuse that “it only matters that they’re not exposed to sunlight.”
This rationale is unacceptable. According to the IEC (International Electrotechnical Commission), cables must never come into contact with the roof in photovoltaic installations. If you disagree, I challenge you to discuss it with me.
Conclusion: Absolutely Clear: This mistake is one of cost-cutting without regard for safety or quality.
Additional Considerations
While some issues might not be visually apparent in the photos, they can significantly impact installation performance. Potential problems include:
- Panels becoming loose or dislodged.
- Risks of electrical arcs.
- Complications with warranties and insurance claims.
Conclusion
Proper planning and execution in photovoltaic installations are crucial for both performance and compliance with insurance requirements. Understanding and avoiding common pitfalls can significantly enhance EPCs’ success and credibility in the industry.
If you are an EPC facing challenges with insurance or installation quality, take proactive steps by learning from these mistakes. For more in-depth insights, don’t hesitate to check out the resources mentioned above.
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