Key points for solar installation in Metal-roofed residences

The key points for solar installation in metal-roofed residences are as follows:

Roof structure and material requirements: The roof material should be a type of metal suitable for photovoltaic installation, such as color steel plate, etc., and the structural strength should be able to bear the weight of photovoltaic modules and related equipment. The deformation of the metal roof should be within the allowable range and not affect the installation.

Preparations before installation:

Cleaning and treatment: Before installation, a thorough cleaning of the metal roof should be carried out to remove any debris.

Material inspection: Carefully inspect all components such as the concealed buckle brackets to ensure they are complete in quantity and free from damage or deformation. For instance, check whether the connecting parts and pressure blocks of the brackets are intact and whether the materials meet the requirements.

Tool preparation: Prepare all the tools needed for installation, such as wrenches, screwdrivers, electric drills, etc., and ensure that the tools can be used normally.

Component layout and installation

Arrangement planning: The arrangement of photovoltaic modules should be reasonably planned based on the shape and size of the roof. Photovoltaic modules of different models should not be mixed and installed at will.

Connection and fixation: The connection between components must be firm and reliable to avoid loosening and affecting power generation. Insulation measures should be taken between the component frame and the metal roof. The fixing bolts of the components should be tightened to prevent loosening. After the components are installed, their appearance should be flat without obvious height differences.

Angle determination: The installation Angle of photovoltaic modules should be determined based on local light conditions. For instance, in the Northern Hemisphere, in areas with a latitude of 30°, the bracket inclination Angle can be set between 20° and 40°.

Waterproofing and anti-corrosion treatment:

Waterproof protection: During the installation process, the original waterproofing of the roof must not be damaged. For standing seam iron sheet roofs, color steel tile clamps and photovoltaic brackets can be used to clamp the joints without damaging the iron sheet of the roof and prevent water seepage from the roof. If installed on a corrugated or trapezoidal metal roof, use sealant to ensure that the roof does not leak.

Anti-corrosion measures: The anti-corrosion coating of the metal roof should not be severely damaged due to the installation of photovoltaic systems. The material of the photovoltaic brackets should have good anti-rust ability, and the anti-corrosion treatment of the brackets should meet the requirements for long-term use.

Electrical Safety and Grounding

Electrical connection: The wiring of the photovoltaic system should be neat and standardized, avoiding cross-confusion. Electrical connection must be strictly carried out in accordance with the electrical installation specifications to ensure that the wires are firmly connected and have good insulation, and to prevent problems such as short circuits and leakage.

Grounding requirements: The grounding resistance of the photovoltaic system must comply with relevant standards, generally not exceeding 4Ω. The support must undergo reliable grounding treatment to prevent damage to the system caused by lightning strikes and other situations, and ensure the safety of personnel and equipment.

Wind resistance and safety measures:

Wind-resistant design: The material of the photovoltaic support frame should have good wind resistance, and the installation position should avoid the weak points on the roof.

Safety protection: Installers must undergo professional training and be familiar with the installation process. The installation site should be equipped with necessary safety protection facilities. Installers must correctly wear safety helmets, safety belts and other safety protection equipment. Safety belts should be hung high and used low to ensure personal safety when working at heights. Clear warning signs should be set up around the construction site to prevent irrelevant personnel from entering the work area and avoid unexpected accidents.

Other precautions:

Environmental impact: The influence of thermal expansion and contraction of the metal roof on the photovoltaic system should be taken into account. The color of the metal roof may affect the heat absorption of the photovoltaic modules. For coastal areas, the salt spray resistance of metal roofs should be taken into account. For areas with snow accumulation, the snow resistance of photovoltaic modules should be considered.

Operation and maintenance passage: The inspection passage of the metal roof should not be blocked by the installation of photovoltaic systems. An operation and maintenance passage should be reserved to facilitate later maintenance and inspection.

Monitoring and maintenance: The monitoring equipment of the photovoltaic system must be able to operate normally and conduct real-time monitoring. After installation is completed, regular inspections of the brackets should be carried out to check for any looseness, corrosion or other conditions, and problems should be identified and dealt with in a timely manner. Regularly cleaning the dust, debris and other impurities on the surface of the support frame to keep it clean is conducive to improving the power generation efficiency of the photovoltaic system. A clean soft cloth or brush can be used for cleaning. Avoid scraping with hard objects. There should be a dedicated person responsible for quality inspection at the installation site.