How to prevent rural users from installing photovoltaic system: In rural areas, coagulation roofing is the main method, and the principle of "drawing without blocking" is adhered to when roofing is waterproof, so as to ensure that the water can flow away smoothly when there is water accumulated in the rainstorm and ensure that the roof is watertight. I understand this truth. In the process of photovoltaic bracket installation, it is necessary to ensure that the bracket base is not vertically arranged with the drainage direction, so as not to hinder the rainwater drainage on the roof. Secondly, if the photovoltaic system is directly installed on the existing roof during construction, the base should be placed smoothly and neatly, and measures should be taken to fix it to avoid overturning and sliding, and avoid the overlapping relationship between the base and the roof structure layer to ensure structural safety. In addition, try to avoid punching holes in the roof. For those cases that must be drilled to destroy the original roof, we should adjust measures to local conditions and do different treatments according to different situations. It is very important to predict the depth before drilling holes in tiles. After the chemical anchor bolt is fixed, the position where the bolt passes through the ceramic tile should be treated with waterproof sealant.