Using SUS304 (Stainless Steel 304) material for solar water drainage clips in PV modules offers several advantages, especially in terms of durability, corrosion resistance, and long-term performance. Here’s why SUS304 is an excellent choice:
The features of SUS304 Solar Water Drainage Clips
- Superior Corrosion Resistance
SUS304 is an austenitic stainless steel with high chromium (18%) and nickel (8%) content, making it highly resistant to:
Rust (from rain, humidity, or coastal salt air).
Chemical corrosion (e.g., acidic bird droppings, pollution).
Outperforms aluminum or carbon steel in harsh environments.
- Long-Term Durability
Withstands UV exposure, extreme temperatures (-200°C to 800°C), and weathering.
Does not degrade or weaken over time like plastic clips.
- Strength & Rigidity
Higher tensile strength than aluminum, preventing bending or deformation under:
Heavy snow loads.
Wind uplift forces.
Provides a secure hold for PV modules.
- Low Maintenance
Does not require coatings or treatments (unlike galvanized steel).
Resists dirt buildup and is easy to clean.
- Compatibility with PV Systems
Non-magnetic (reduces interference with electrical components).
Thermally stable, minimizing expansion/contraction issues.

Where SUS304 Drainage Clips Excel
Coastal areas (saltwater corrosion resistance).
Industrial zones (pollution/chemical resistance).
High-humidity regions (tropical climates).
Snow-heavy locations (strength to handle load).
Installation Tips for SUS304 Clips
Pair with stainless steel fasteners (avoid galvanic corrosion from mixed metals).
Ensure proper spacing (e.g., every 1–2 meters) for effective drainage.
Inspect periodically for debris blockage (though less likely with smooth stainless steel).
When to Choose SUS304 Over Plastic or Polymer Material?
If your project is in a corrosive environment (near oceans, factories, or high pollution).
For longer system lifespans (25+ years) with minimal maintenance.
When structural strength is critical (e.g., heavy snow/wind zones).
Versatile Size Options in our company: Choose from 30mm,33mm, 35mm, or 40mm clips to perfectly fit your solar panel modules, ensuring proper drainage and protection.
Details:
*Product Name: Solar Panel Mud Discharge Clip
*Material: SUS304/A2-70
*Color: Silver
*Sizes: 30mm,33mm, 35mm, 40mm
MOQ: 1pcs
Notice
Each solar panel requires two clips installed near the corners for optimal drainage.
If the solar panel has existing sludge or heavy dirt, it must be cleaned before installing the clip to ensure proper drainage.