Mounting system costs depend on materials, galvanizing, and profiles (Source: Sohu). Golden Rule: Steel accounts for over 72% of fixed-tilt mounting costs (Source: Sohu); Core Factor: Galvanizing fees account for 19–20% (Source: Sohu); Note: Foundations account for 25–40% (Source: PVrack).
I.
Raw Material: Steel
Fixed-tilt: Raw materials account for over 72% of fixed-tilt mounting costs (Source: Sohu); Tracking: Steel accounts for 65% of tracking mounting costs (Source: Sohu); Carbon Steel: $700–900/ton (Source: PVrack); Proportion: Carbon steel accounts for 50–60% of material costs (Source: PVrack); Strength: Yield strength >450 MPa (Source: Yiteng)—Steel: 72% + 65% + 450 MPa (three key points).
II.
Galvanizing Treatment
Fixed-tilt: Outsourced galvanizing accounts for 19–20% of costs (Source: Sohu); Cost: Zinc coating costs $200–400/ton (Source: PVrack); Proportion: Galvanizing accounts for 15–25% of material costs (Source: PVrack); Thickness: Hot-dip galvanized layer >70 μm (Source: Sohu); Lifespan: 25-year outdoor service life (Source: Sohu)—Galvanizing: 19–20% + 70 μm + 25 years (three parameters).
III. Main Profiles
Proportion: Main profiles 50–60% (Source: ALV); Components: Rails, uprights, diagonal braces (Source: ALV); Aluminum Rails: Extruded aluminum 45–55% (Source: OmniSol); 6005: 6005-T5 alloy (Source: OmniSol); Q355B: Q355B C-section steel (Source: Tender documents)—Profiles: 50–60% + Aluminum rails + Q355B (three components).
IV.
Connectors
Proportion: Connectors 15–20% (Source: ALV); Components: Base plates, clamps, splicing plates (Source: ALV); Clamps: Zinc die-cast mid-clamps 8–12% (Source: OmniSol); Roof Hooks: Roof hooks 10–15% (Source: OmniSol); Fasteners: Stainless steel fasteners 15–20% (Source: OmniSol)—Connections: 15–20% + Clamps + Fasteners (three components).
V.
Fasteners
Proportion: Fasteners 5–10% (Source: ALV); Components: Bolts, nuts, washers (Source: ALV); Material: Corrosion-resistant stainless steel (Source: OmniSol); Seismic: Seismic component plate thickness ≥5mm (Source: Sohu); Diagonal Braces: Diagonal brace wall thickness ≥2mm (Source: Sohu)—Fastening: 5–10% + Stainless steel + Seismic resistance (three requirements).
VI. Foundations and Packaging
Foundations: Foundation materials 25–40% (Source: PVrack); Ground Piles: Pile foundation concrete ballast (Source: PVrack); Subgrade: Foundation depends on soil conditions (Source: PVrack); Packaging: Packaging and transport 5–10% (Source: ALV); Manufacturing: Manufacturing and processing 10–15% (Source: PVrack)—Foundations: 25–40% + Packaging + Manufacturing (three components).
VII.
Procurement Recommendations
First, monitor steel (the major cost component); second, check galvanization (70μm); third, verify material grade (Q355B); fourth, calculate foundation requirements (soil-dependent);
fifth, align with standards (GB, ISO, TUV)—Mounting System: Steel + Galvanization + Foundations (three core elements).
