What Is a Solar Mounting Structure?
A solar mounting structure supports the panels against wind, rain, heat, and corrosion.
In harsh outdoor conditions like Delhi NCR, poor-quality structures often lead to rust, misalignment, and safety risks.
Hot-Dip Galvanized (HDG) Structure
In Hot-Dip Galvanization, the steel structure is fabricated first and then dipped into molten zinc.
This process coats every surface—including joints and cut edges—creating superior corrosion protection.
- Zinc coating thickness: 70–120 microns
- Excellent rust resistance
- Cut edges fully protected
- Ideal for outdoor solar installations
Pre-Galvanized (PG / GI) Structure
Pre-galvanized steel is coated with zinc before fabrication.
Once the sheet is cut or drilled, exposed edges remain unprotected, increasing rust risk.
- Zinc coating thickness: 20–40 microns
- Cut edges exposed
- Rust starts early at joints
- Suitable only for short-term or indoor use
HDG vs Pre-Galvanized – Comparison
| Parameter | HDG | Pre-Galvanized |
|---|---|---|
| Zinc Coating | 70–120 microns | 20–40 microns |
| Corrosion Protection | Excellent | Moderate |
| Outdoor Lifespan | 20–30+ years | 5–10 years |
| Cut Edge Protection | Fully protected | Exposed – rust risk |
| Maintenance | Minimal / Nil | Frequent repainting |
| Best Use | Long-term solar rooftops | Short-term applications |
Why Exolar Uses HDG Structures
At Exolar, we prioritize safety, durability, and long-term performance.
Our experience shows that HDG structures outperform pre-galvanized options in real rooftop conditions.
- Better wind-load resistance
- No rust at joints or edges
- Lower lifetime maintenance cost
- Designed for 25+ years solar lifespan
Final Verdict
If your solar system is meant to last decades, Hot-Dip Galvanized (HDG) structures are the safest and smartest choice.
Pre-galvanized may look economical today, but HDG protects your investment for life.
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