Influence of Steel Roof Inclination on Photovoltaic Power Generation

With the popularization and application of industrial and commercial photovoltaics, more and more industrial enterprises are using their factory roofs to build photovoltaic power generation system. There is usually no objection to installing photovoltaics on the south slope, but how to deal with the installation of photovoltaics on the north slope of the color steel roof. Whether to continue to use the tiling method or to meet the requirements of the optimal inclination angle of the photovoltaic array by installing a bracket with an inclination angle is a problem that has troubled many engineers and technicians. Let's discuss this topic together today.

As we all know, the drainage performance of the color steel roof is better, the design slope of most color steel roofs is about 3~6%, and the inclination angle is usually about 3°~5°. In order to ensure the safety, rainproof performance and wind resistance of the original structure of the roof, usually when installing photovoltaics on the color steel roof, no matter on the south slope or the north slope, it is directly tiled and installed without using additional installation brackets scheme. This is not only to reduce the weight of the photovoltaic support attached to the roof as much as possible and reduce the load on the roof, but also to reduce the wind load and avoid damage to the photovoltaic array by strong winds.

Undoubtedly, since the inclination angle of most color steel roofs cannot meet the requirements of the optimal inclination angle, the photovoltaic power generation array tiled on the roof cannot obtain the best power generation effect, especially the photovoltaic power generation array installed on the north slope may not be effective.

So how much impact does the photovoltaic array installed on the north slope have on power generation? We use PVsyst software to simulate and analyze. The conclusion is as follows:For low-latitude regions, installing photovoltaics on color-steel roofs with smaller slopes has less impact on power generation, and better results can be obtained on both the south and north slopes of the roof. Installing photovoltaics on the roofs of buildings with small slopes in high latitudes, especially on the north slope, will have a relatively large impact on power generation. However, in order to ensure the safe operation and wind resistance of photovoltaic arrays, the photovoltaic array installed on the tile surface should also be tiled.