Solar PV stations are designed for 25-year service life. Fastener quality, inspection and installation standards are essential for long-term safe operation. This article introduces full-process specifications for selection, inspection, installation and acceptance.
| Item | General Requirement | Inland Station | Coastal Station |
| Strength Grade | Min Grade 8.8 | 8.8 / 304 SS | 10.9 / 316 SS / Dacromet |
| Salt Spray | ≥480h | 500-800h | ≥1000h |
| Anti-loosening | Spring & flat washers | Standard assembly | Anti-slip structure added |
All fasteners shall be sampled and inspected before use. Complete test reports and certificates are required. Control tightening torque during construction to avoid thread damage or loosening. Keep vertical operation for self-drilling screws to ensure waterproof performance.
Check all fastening points after completion, especially main load-bearing parts. Establish complete product files for future maintenance and parts replacement.