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Knowledge News of choosing Solar Mounting

How to install the Mid and End Clamp

Mar. 27, 2025

     With the rapid development of the photovoltaic industry, photovoltaic brackets are an integral part of photovoltaic power generation systems, and their installation quality directly affects the stability and power generation efficiency of the system. Now the WOCHN technical department is giving a detailed explanation on the installation of the Mid and End Clamp of the TR Rail.


1.The Importance of Mid and End Clamp Installations

     Mid and End Clamp apply pressure on the middle and edges of the board respectively. They are mainly used to fix solar mounting system and solar panels ,ensure their stability. This step can effectively prevent the solar panels from shifting or loosening in severe weather such as strong winds, rain, and snow.

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2. Steps for clamp installation

  • Preparation

     Before installation, people needs to ensure that the size of the board meets the design requirements. WOCHN's mid clamp and end clamp, universal for 30mm-35mm framed module. At the same time, prepare the tools required for installation, such as wrenches, torque wrenches, etc.

  • Mid-clamp installation

     First put the block into the rail notch as shown below, confirm the position of the boards on both sides and make sure they fit perfectly with the rails.Prevent installation from being unstable due to tilt. Pay attention when installing to ensure uniform pressure and avoid being too tight or too loose.

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  • End-clamp installation

    At the edge of the solar panel, first insert end clamp into the rail notch as shown in the figure. When installing the edge pressure, pay special attention to the fit between the board and the edge of the bracket. As with mid clamp installation, avoid being too tight or too loose. After installation is complete, check the overall stability of the bracket again.

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4.Installation precautions

     Torque control: The tightening torque of the bolts must be implemented in accordance with the design requirements. If it is too tight, it may cause the guide rail to deform, and if it is too loose, it will affect the installation stability.

     Environmental factors: In severe weather conditions (such as strong wind, rain and snow), the installation work should be suspended to avoid environmental factors affecting the installation quality.


    This kind of our mid and end clamp are made of anodized aluminum, which is corrosion-resistant and high-temperature resistant, and is easy to install and transport. Currently in addition to TR rails, they can also be used in mini rails, TRB rails,  triangle solar mounting system and other WOCHN systems


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