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How to Install PV Modules on the Rooftop?

Views: 57     Author: Site Editor     Publish Time: 2023-10-20      Origin: Site


Installing a solar photovoltaic (PV) system on a roof is a crucial process that requires ensuring the system efficiently captures solar energy while maintaining its safety and stability. This article will describe how to use the SRS (Solar Racking System) to install PV modules more securely and efficiently.

Step 1 Roof Suitability Assessment

Before considering the installation of a solar PV system, it's essential to assess the roof's suitability. The following are key factors to consider:

Roof Strength: The roof must be sturdy enough to support the weight of PV modules. Typically, each PV module weighs around 35-45 kilograms. Ensuring that the roof can handle this weight is crucial.

Available Space: PV modules require sufficient installation space. Typically, a flat roof can generate approximately 75W per square meter, while a south-facing roof can yield about 130W per square meter. Determine the system capacity based on available space.

Orientation Choices: While it's generally recommended to orient the PV modules towards the south, some studies suggest that west-facing PV modules may be more economical, especially when electricity is billed on a tiered basis. This is because west-facing PV modules can generate electricity more effectively during the afternoon power peak.

Step 2 Design and Layout of PV Modules on the Roof

Compared to traditional installation methods, the SRS system provides greater flexibility and adaptability, particularly when dealing with different types of roof scenarios. The design of the SRS system allows it to address the following situations:

Irregular Roof Shapes: Some roofs may not be standard rectangles or squares, and their shapes may be irregular. Using different combinations of the SRS system, you can quickly and conveniently design and arrange PV modules to adapt to various roof shapes, ensuring maximum energy capture.

Shadow Obstruction Issues: Shadows can result from nearby buildings, trees, or other obstacles, causing some parts of the roof to be shaded. The SRS system can be used to install PV modules in unobstructed areas, minimizing energy losses through flexible combinations and layouts.

Compatibility with Various Roof Types: There are various types of roofing materials available, such as trapezoidal sheet metal, standing seam sheet metal, corrugated metal, and lock-seam metal, among others. The SRS system's design allows compatibility with different roofing materials, including clay tiles and asphalt shingles.

Step 3 PV Module Installation


Standardized Components of the SRS System: The SRS system comprises three standardized components – standard PV modules, standard rails, and standard accessories. Select high-quality PV modules to ensure the system's long-term performance. Standard rails come in two different lengths and include integrated clamps, allowing for various installation combinations, increasing installation flexibility and efficiency.

Streamlined Installation Process: The SRS system uses integrated clamps that simplify the installation of PV modules, making it quicker and easier. This system allows installers to easily insert rails and serves as both edge and center clamps, ensuring standardized installation. This feature makes the installation more flexible and convenient while guaranteeing stability and reliability. Additionally, the nut design allows for insertion at any position on the rail, significantly improving on-site installation efficiency.

In addition to the above, considerations must also be given to selecting inverters, cables, distribution boxes, grounding measures, and other components that are compatible with the PV modules. Installing PV modules on the roof is a critical decision that requires a thorough assessment of roof suitability and the selection of an appropriate installation method. The SRS system provides an efficient solution, with its standardized components and simplified installation process ensuring a more secure and efficient PV system on the rooftop.

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