There are three main types of roofs in rural areas: color steel tile roofs, brick and tile structure roofs, and flat concrete roofs. There are significant differences in the three types of roof structures, and even for the same area, the installation methods of photovoltaic power generation systems are also different. Today, let's talk about the issues that should be paid attention to when installing photovoltaic power plants on colored steel plate roofs:

考察屋顶光伏方阵的选址：（1）屋顶结构（固定支架，保证防水）。（2）檩条间距，方向，尺寸距离。（3）屋面结构，组件排布。（4）避免阴影遮挡。

Site selection for investigating the rooftop photovoltaic array: (1) Roof structure (fixed bracket to ensure waterproofing). (2) Purlin spacing, direction, size distance. (3) Roof structure, component layout. (4) Avoid shadow occlusion.

做好防水工作：在安装光伏系统时，要保证在避免破坏屋顶的情况下安装。具有防水层的屋顶需要避免打孔，彩钢屋顶进行打孔的需要使用防水胶或胶垫。

Do a good job in waterproofing: When installing a photovoltaic system, it is first necessary to ensure that the installation is carried out without damaging the roof. Roofs with waterproof layers need to avoid drilling, and colored steel roofs need to use waterproof glue or rubber pads for drilling.

组件长宽的摆放：安装时，组件根据屋面面积确定组件长宽的摆放，组件长边垂直于龙骨时，节省支架成本。安装时要预留走线槽的宽度。

Placement of component length and width: During installation, the placement of component length and width is determined based on the roof area. When the long side of the component is perpendicular to the keel, it saves support costs. The width of the wiring duct should be reserved during installation.

彩钢屋顶荷载：一般情况下钢结构厂房上面装光伏发电设备每平米会增加15公斤的重量，大型商企业的屋顶一般都会有原设计院的图纸，考察前我们如果能够获得图纸，可以详细了解屋顶结构及电气结构分布。通过图纸查看屋顶荷载是否满足安装要求，查看建筑设计说明中恒荷载的设计值，并落实除屋面自重外，是否额外增加其他荷载，如管道吊置设备屋面附属物等，并确定恒荷载是否有余量能够安装光伏电站。

Color steel roof load: Generally, installing photovoltaic power generation equipment on steel structure factories will add 15 kilograms of weight per square meter. Large commercial enterprises usually have drawings from the original design institute for their roofs. If we can obtain the drawings before inspection, we can have a detailed understanding of the roof structure and electrical structure distribution. Check whether the roof load meets the installation requirements through the drawings, check the design value of the constant load in the building design instructions, and determine whether additional loads are added in addition to the roof self weight, such as pipeline suspension equipment and roof attachments, and determine whether there is any allowance for the constant load to install the photovoltaic power plant.

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