1. Cement counterweight method
Photovoltaic solar racking ① Pouring cement piers on the cement roof is a common installation method, which is stable and does not damage the waterproofing of the roof. However, it requires a lot of labor and time. The cement pier requires more than a week of curing and curing time. It can be installed only after the cement pier is completely cured. The solar mounting bracket requires a large number of prefabricated molds.
②Prefabricated cement counterweight saves time in making cement piers and can be ordered as counterweight cement bricks in advance.
2. Steel structure link
A flange plate is used at the bottom of the support column, and galvanized steel is used to connect several support arrays together. 500KW or even more than one megawatt is a unit. The self-weight of the support array is used to increase wind resistance. Only a few cements are needed for the main points of the roof. Piers, fixed large array of solar mounting brackets. This method is quick and easy to install and easy to disassemble, but the cost is too high, and the cost of the bracket is not less than 1 yuan per watt.
3. chemical anchor bolts
For prefabricated slab workshops, the unit area weighs a lot. A 5 cm thick cement layer can be made on the roof, and then chemical anchor bolts are used to fix the solar mounting brackets. When drilling holes, the roof waterproof layer will not be damaged. Life expectancy remains to be tested. This method has no expansion force for anchoring, simple construction, and cost-saving, but it has poor heat resistance and fails at high temperatures and cannot be welded.