When installing solar panels on roofs made of different materials, it is necessary to consider their respective compatibility points to ensure the safe and efficient operation of the photovoltaic system. The following is a summary of the compatibility points for several common roof materials when installing solar panels:
Concrete roof
Load-bearing capacity
Key points for assessment: The load-bearing capacity of the concrete roof must meet the total weight of equipment such as photovoltaic modules, brackets, and cables. Generally, concrete roof structures are stable and have strong load-bearing capacity, but they still need to be confirmed through professional assessment.
Installation method:
Common methods: Installation is carried out by counterweight method or pile foundation method. The counterweight method uses concrete counterweight blocks as the foundation to stabilize photovoltaic panels. The pile foundation rule fixes the support by driving piles.
Waterproof treatment:
Key measures: Ensure that the roof waterproof layer is not damaged during the installation process. For pile foundation installation, waterproof treatment around the pile holes should be done well.
Inclination Angle and orientation:
Optimization suggestion: Adjust the installation Angle of the photovoltaic panels according to the local latitude and light conditions to obtain the maximum amount of solar radiation. Generally, the south direction is the best orientation.
Color steel tile roof
Load-bearing capacity and integrity
Key points for assessment: The load-bearing capacity of the color steel tile roof must meet the installation requirements of the photovoltaic system, generally requiring a load-bearing capacity of over 20kg/㎡. At the same time, ensure that the installation process does not damage the integrity of the color steel tiles.
Installation method:
Common methods: Installation is carried out by using the fixture method or structural adhesive bonding method. The fixture method fixes the photovoltaic panels on the color steel tiles through special fixtures without damaging the structure of the color steel tiles. The bonding rule of structural adhesive must ensure a firm bond to prevent water leakage.
Waterproof treatment:
Key measures: For fixture installation, it is necessary to ensure that the connection between the fixture and the color steel tile is well sealed. For the structural adhesive bonding method, high-quality waterproof structural adhesives should be selected and it is necessary to ensure that the bonding surface is seamless.
Tilt Angle adjustment
Optimization suggestion: Adjust the installation Angle of the photovoltaic panels according to the original inclination Angle of the color steel tiles to achieve the best power generation efficiency. If the inclination Angle needs to be increased, the renovation cost and power generation gain should be comprehensively considered.
Tiled roofs (such as ceramic tiles, asphalt tiles, etc.)
Load-bearing capacity and openability:
Key points for assessment: The load-bearing capacity of the tiled roof must meet the installation requirements of the photovoltaic system, generally requiring a load-bearing capacity of over 40kg/㎡. Meanwhile, the tiles should be removable to facilitate the fixation of the support system at their lower part.
Installation method:
Common methods: Use the hooking method or the penetration installation method. The hooking method fixes photovoltaic panels to wooden beams or cement load-bearing structures under the tiles through special hooks. The through-type installation rule requires drilling holes in the tiles and installing brackets.
Waterproof treatment:
Key measures: For the hook installation method, it is necessary to ensure that the connection between the hook and the tiles, wooden beams or cement load-bearing structures is well sealed. For the through-type installation method, high-quality waterproof sealing materials should be selected, and it is necessary to ensure that the drilled holes are sealed without any gaps.
Tile protection
During the installation process, it is necessary to avoid damaging the tiles to prevent affecting the aesthetic appearance and waterproof performance of the roof.
Sloping roofs (such as tiled roofs, metal roofs, etc.)
Natural drainage
Advantages and features: The sloping roof is conducive to the rapid drainage of rainwater, reducing the risk of water accumulation and leakage.
Ease of installation:
Advantages and features: No additional brackets need to be laid. The photovoltaic panels can be directly laid according to the inclination Angle of the roof, and the construction process is relatively simple.
Inclination Angle and orientation:
Optimization suggestion: Adjust the installation Angle of the photovoltaic panels according to the original inclination Angle of the roof to achieve the best power generation efficiency. At the same time, ensure that the photovoltaic panels face the best orientation (such as the south direction).
Wind pressure stability
Key points for assessment: For sloping roofs with a large slope, it is necessary to assess the impact of wind pressure on the stability of photovoltaic panels and take corresponding reinforcement measures.
Flat roofs (such as concrete roofs, asphalt roofs, etc.)
Bracket design:
Key point: A stable support system needs to be designed to support the photovoltaic panels. The support frame should have sufficient strength and stability to withstand the influence of natural factors such as the weight of photovoltaic modules and wind pressure.
Waterproof treatment:
Key measures: Ensure that the roof waterproof layer is not damaged during the installation of the support. For the installation of supports by the pile foundation method, waterproof treatment around the pile holes should be done well.
Inclination Angle and orientation:
Optimization suggestion: Adjust the installation Angle of the photovoltaic panels according to the local latitude and light conditions to obtain the maximum amount of solar radiation. Generally, the south direction is the best orientation. If installation facing south is not possible due to site limitations, factors such as power generation loss and architectural aesthetics need to be comprehensively considered.
Drainage design
For low-inclination flat roofs, the drainage issue on the surface of the photovoltaic panels needs to be taken into consideration. It can be installed at an Angle or by setting up drainage channels, etc., to ensure that rainwater can be discharged smoothly.
General Precautions
The roof property rights are clear:
Prerequisite: Before installing solar panels, it is necessary to ensure that the property rights of the roof are clear and uncontested.
Professional Assessment and Design
Necessary steps: Before installation, a comprehensive assessment of the roof is required, including factors such as load-bearing capacity, structural stability, orientation, and inclination. And formulate a professional design plan based on the assessment results.
Select high-quality products:
Important guarantee: Select reliable photovoltaic modules, brackets, cables and other equipment and materials to ensure the long-term stable operation of the photovoltaic system.
Professional construction team
Key factor: Select a construction team with qualifications and experience for installation and construction to ensure the quality and safety of the construction.
Post-operation and maintenance and monitoring:
Long-term guarantee: After installation is completed, regular operation and maintenance as well as monitoring of the photovoltaic system are required to promptly identify and address potential issues and malfunctions.
