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Mid Pressure Block: The mid pressure block is primarily used to secure the middle section of two adjacent photovoltaic (PV) panels, keeping them tightly connected. This prevents displacement or warping of the panels when external forces are applied, ensuring the overall stability and flatness of the PV module array. This contributes to the normal operation and power generation efficiency of the photovoltaic system.
Edge Pressure Block: The edge pressure block is installed at the edges of the PV modules to enhance the stability of the array's edges. It prevents the panels from lifting or shifting at the edges under external forces, such as wind or seismic loads. Additionally, it helps seal the gaps between the panels, preventing water, dust, and debris from entering beneath the panels, thus protecting the back of the modules and the mounting structure.
Material: Both mid pressure blocks and edge pressure blocks are typically made of aluminum alloy. Aluminum alloy is lightweight, strong, corrosion-resistant, and easy to process and install. It is well-suited to withstand the harsh outdoor conditions and remains rust-free and durable over time, ensuring the reliability and stability of the PV module fixation.
Characteristics:
Good Compatibility: The size and shape of mid and edge pressure blocks are generally designed and customized to fit different specifications of photovoltaic panels, ensuring a perfect match for optimal fixing.
Ease of Installation: Their design is simple and rational, with straightforward installation methods using bolts or clips to secure them to the PV panels and racks. This facilitates quick and efficient installation without the need for complex tools or processes, improving the overall installation efficiency of the photovoltaic system.
Aesthetics: Aluminum alloy pressure blocks are visually appealing and blend well with the appearance of the PV modules and the entire photovoltaic system, not affecting the overall aesthetic of the building or installation site.
Mid Pressure Block Installation:
Place the mid pressure block at the junction between two adjacent photovoltaic panels. Align the slots or holes of the pressure block with the edges or reserved holes of the PV panels. Then, use the corresponding bolts or nuts to tighten the mid pressure block, securely connecting the two panels. During installation, ensure that the position of the mid pressure block is accurate, and the tightening of the bolts is moderate—tight enough to fix the panels firmly, but not too tight to avoid deforming the modules.
Edge Pressure Block Installation:
The edge pressure block is installed at the edges of the photovoltaic array. First, align one end of the pressure block with the edge of the panel. Then, gradually install it along the edge, ensuring that the slots or fasteners of the block are in close contact with the panel and the rack. Finally, use bolts or other fasteners to secure the edge pressure block to the mounting rack. When installing edge pressure blocks, make sure the connections are tight, with no gaps, to achieve optimal fixing and sealing.
Compatibility with PV Module Specifications: Photovoltaic modules may vary in thickness, edge shape, and location of reserved holes. When selecting mid and edge pressure blocks, it's essential to choose the correct type based on the specifications of the PV modules in use, ensuring a perfect fit for a secure fixation.
Load-bearing Capacity: Depending on the location and local weather conditions (such as wind speed, snow load, etc.), the required load-bearing capacity of the pressure blocks must be assessed. In regions with high winds or heavy snow, pressure blocks with higher load-bearing capacities should be selected to ensure the stability and safety of the PV panels under extreme weather conditions.
Quality and Brand: Since mid and edge pressure blocks play a crucial role in the photovoltaic system, their quality directly impacts the stability of the PV module fixation and the overall system's longevity. It is advisable to choose products from reliable, well-regarded brands, and evaluate their quality and performance through product certifications, user reviews, and other methods.
