Solar PV power stations are often built in harsh outdoor environments. PV screws must meet 25+ years weather resistance, anti-loosening and anti-corrosion requirements.
| Item | Ordinary Screw | PV Screw |
| Environment | Indoor/short outdoor | Long-term outdoor (-40℃~80℃) |
| Lifespan | 3–5 years | 25+ years |
| Salt Spray | 48–96 hours | ≥1000 hours |
| Strength Grade | Grade 4.8 | Grade 8.8/10.9 |
| Material | Salt Spray Life | Application |
| 304 SS | 500–800h | Inland PV stations |
| 316 SS | 1000–2000h | Coastal, high humidity |
| Dacromet | 1200h+ | High corrosion, high temp |
Choose 304 SS/HDG 8.8 for inland, 316 SS for coastal, Dacromet for severe conditions. Quality PV screws ensure long-term safety and reduce maintenance costs.