The PV solar cell array mounting bracket is used to support the solar cell array. The structural design of the solar cell array is to ensure that the solar cell array and the solar mounting bracket are firmly connected and reliable, and the solar cell array can be easily replaced. Brackets and other required materials (such as bolts) should be made of durable, rust-proof, UV-resistant materials. The solar array and bracket must be able to withstand 120km/h of wind without being damaged.
When installing a PV solar cell array mounting bracket, all square array fasteners must have sufficient strength to securely mount the solar array on the bracket. The solar cell array can be mounted on the roof, but the bracket must be connected to the main structure of the building and not to the roofing material. For a ground-mounted solar cell array, the minimum distance between the square array of solar cells and the ground should be above 0.3 m. The bottom of the column must be securely attached to the foundation to withstand the weight of the solar array and withstand the design wind speed.
In the design of PV solar cell array support structure, a problem that needs to be highly valued is the wind resistance design. According to the technical parameters of the solar cell array manufacturer, the solar cell array can withstand a windward pressure of 2700Pa. If the wind resistance coefficient is selected to be 27 m/s (equivalent to ten typhoons), according to the non-viscous fluid mechanics, the solar cell array is subjected to a wind pressure of only 365 Pa. Therefore, the assembly itself is fully capable of withstanding wind speeds of 27 m/s without damage. Therefore, the key considerations in the design are the solar cell array support design, the basic design and the connection design of the bracket and the foundation. The connection design of the solar cell array bracket and the foundation should be fixed by bolts.
The component solar mounting structure must withstand environmental stresses such as wind and snow. The mounting holes should be easy to install and adjust, and must withstand certain mechanical stresses. The correct mounting structure materials can minimize the corrosion of the component frame, mounting structure and materials. The solar cell array should be installed in such a way as to ensure maximum exposure to sunlight, taking into account changes in the direction of sunlight incident during the day and the height of the winter and summer sun from the horizon during the year. Under normal circumstances, the components should be installed obliquely toward the equator, that is, the light receiving surface of the northern hemisphere component should face the south, and the light receiving surface of the southern hemisphere component should face the north. In general, the angle between the components and the ground should refer to the local latitude ± (5 ° ~ 10 °).
The solar array is checked for building codes when installing on the roof, ensuring that the building and its structure (roof, exterior, load-bearing, etc.) required for the assembly have sufficient load-bearing capacity. When installing components, ensure that the components are installed on a fire-resistant roof with a roof tilt angle of less than 5 in/ft to ensure fire rating and to ensure that it is securely secured and not damaged by strong winds or heavy snow. When installing on a roof, the roof that needs to be penetrated when installing the fixed components should be properly sealed to prevent leakage.
The bracket for installing the solar cell array on the cement flat roof can be divided into two parts, one is the base part of the bracket, and the other is the bracket part. The base of the bracket is made of concrete with the number C30, and the base (cement pier) of the bracket is arranged as shown in Fig. 1. When the fence is too high or there are obstacles on the ground (lightning strips, conduits, bridges), the brackets with raised feet can be used. The roof can be opened in double rows, and the back of the solar array should ensure smooth ventilation (components and mounting surfaces). The minimum interval is 10cm).
The brackets produced by different manufacturers are different. The brackets that are applicable according to the unique conditions of the site are also different. The cement flat roof self-weight bracket.