The selection of the bracket directly affects the operational safety, damage rate and construction investment of the PV modules. Choosing the right PV bracket can not only reduce the project cost, but also reduce the cost of post-construction maintenance.
1, Fixed photovoltaic bracket
Photovoltaic arrays do not rotate with changes in the angle of incidence of the sun and receive solar radiation in a fixed manner. According to the setting of the inclination angle, it can be divided into: the best inclination fixed type, the inclined roof fixed type and the inclined angle adjustable fixed type.
2, The best inclination angle
The best installation inclination angle is calculated first, and then all the arrays are fixed and installed using this inclination angle. Currently, they are widely used in flat roof roof power stations and ground power stations.
3, Flat roof - concrete foundation bracket
The flat roof concrete foundation support is the most common installation type in the current flat roof power station. According to the basic form, it can be divided into a strip foundation and an independent foundation; the connection between the support pillar and the foundation can be connected through anchor bolts or directly support Column embedded in concrete foundation.
Advantages: good wind resistance, high reliability, and does not damage the roof waterproof structure.
Disadvantages: It is necessary to first make a concrete foundation and maintain enough strength to carry out the follow-up bracket installation. The construction period is longer.
4, Flat roof - concrete ballast bracket
Advantages: The construction method of concrete ballast supports is simple, and it can be installed at the same time when the counterweight blocks are produced, saving construction time.
Disadvantages: The concrete ballast supports have relatively poor wind resistance, and the weight of the counterweight must be designed to take full account of the local maximum wind force.
5, Pitched roof fixed
Considering the generally poor bearing capacity of inclined roofs, most of the components on the inclined roof are directly tiled. The azimuth and inclination of the components are generally consistent with the roof. According to the different types of inclined roof, it can be divided into tile roof installation system .
6, Tile roof installation system
The tile roof installation system mainly consists of hooks, guide rails, pressure blocks, and bolts and other connection components.
7. Tin roof installation system
Light steel roofs, also called color steel tile roofs, are mainly used in industrial plants and warehouses. According to different types of color steel tile, it can be divided into angle relaxation type light steel roof, standing seam steel roof and ladder type light steel roof.
The reclining type light steel roof and the standing seam type light steel roof mainly use a clamp as a connecting member to fix the guide rail on the roof, and the ladder type light steel roof needs to use a self-tapping bolt to fix the connecting member on the roof.
Regardless of the type of roofing, the measurements of “angle relief”, “upright edge” and “trapezoid” dimensions must be taken when selecting the connection piece to ensure that the connection piece and the roof are matched, and that the ladder type light steel roof bracket must be installed. Good waterproof measures to avoid leaks at the bolt hole.