1. Structural strength and roof fit

• Select the Photovoltaic bracket that conforms to the Design Code for Photovoltaic Power Plants (GB50797-2012), with steel plate thickness ≥ 2.0 mm and hot-dip zinc thickness ≥ 60 µm; ≥ 80 µm in coastal areas.

• Carry out roof load calculations to ensure that the total load of the bracket ≤ roof load limit; if necessary, reinforce the roof structure or use lightweight aluminum alloy/stainless steel brackets.

2. Waterproof, lightning protection, equipotential

• Bracket installation without destroying the waterproof layer, if you need to perforate the use of waterproof casing and good sealing treatment

• All metal parts must be reliably grounded to form an equipotential connection, and the grounding resistance should be checked before the thunderstorm season and the anticorrosion layer should be repainted.

3. Cable corrosion protection and wiring

• Adopt UV-resistant and anti-aging PV DC cables; laying threading pipes or waterproof grooves on the roof, avoiding direct exposure to the outside

• Regular inspection of the cable outer jacket, found corrosion timely replacement

4. System design and shadow analysis

• Shading, tilt, and azimuth optimization using PV design software (e.g., PVSyst) to ensure that average annual power production meets expectations

• Consider local sunshine, wind direction, snow load and other climatic factors when selecting models, and reasonably determine the angle of inclination of the bracket.

5. Contracts and property rights

• The contract specifies the ownership of the roof, the term of the lease, the method of rent billing, the responsibility for maintenance, liquidated damages and the terms of compensation for roof demolition and relocation.

• When signing the Roof PV Lease Agreement with the roof owner, agree on the allocation of the building demolition and change of ownership risks

6. Material quality control

• When purchasing, suppliers are required to provide hot-dip zinc thickness, steel thickness, material qualification certificates; on-site sampling of galvanized layer thickness and welding quality

• For high wind pressure areas, use thickened steel plate (≥2.5 mm) or double-layer bracket structure.

7. Construction and Operation and Maintenance Management

• Formulate the "Bracket Installation Quality Control Manual" before construction, including requirements for opening accuracy, bolt fastening, bracket leveling, etc.

• A complete site acceptance upon completion: bracket positioning, grounding, sealing, corrosion protection, and tilt calibration should be documented and signed.

• Establish a regular inspection program (once every six months), focusing on checking loose bolts, galvanized layer falling off, bracket deformation, roof leakage, etc.