6 points to pay attention to when installing rooftop photovoltaics. Installing photovoltaic modules on a flat roof in a flat manner seems to be the most natural way. Not only can the installation volume/area be maximized, but it is also possible to use photovoltaics as roof ceilings to increase space area.

但事实上，在平屋顶上安装光伏，并不意味着您还应该将其倾斜度设置为0度，我们需要考虑很多因素，应避免平装，包括：

But in fact, installing photovoltaic on a flat roof does not mean that you should also set its inclination to 0 degrees. We need to consider many factors and avoid flat installation, including:

平铺组件容易积灰，积灰可能造成10％甚至30%的发电量损失；

Flat components are prone to dust accumulation, which may cause a 10% or even 30% loss of power generation;

清洗更不方便，积水不易流出；可能无法靠自然降雨来去除积灰；

Cleaning is more inconvenient, and accumulated water is not easy to flow out; It may not be possible to rely on natural rainfall to remove accumulated ash;

与倾斜安装相比，发电量将减少；投资回报期将更长；

Compared to inclined installation, the power generation will be reduced; The investment return period will be longer;

倾斜安装和纯平铺的光伏阵列发电量会有明显的不同，通过对一个11.2kWp太阳能系统进行仿真模拟，倾角分别为10度、5度和0度。

There will be significant differences in the power generation between tilted and flat photovoltaic arrays. Through simulation of an 11.2kWp solar system, the tilt angles are 10 degrees, 5 degrees, and 0 degrees, respectively.

仿真结果表明，如果倾角为0度，则11.2kWp系统年发电量约为13,480.3kWh，而在5度倾角下，该系统一年发电量达到14,066.9kWh。而事实上，当倾角为10度时，该系统年发电量达到14,520kWh。

The simulation results show that if the inclination angle is 0 degrees, the annual power generation of the 11.2kWp system is about 13480.3kWh, while at a 5 degree inclination angle, the annual power generation of the system reaches 14066.9kWh. In fact, when the inclination angle is 10 degrees, the annual power generation of the system reaches 14520kWh.

从结果中可以看出，每增加5度，系统每年增加500kWh的发电量（15度后，增加量会明显减少，超过佳倾角后反而会更低）。而且，上述仿真模拟还没有考虑低倾角安装时由于积灰而造成的发电量损失。

From the results, it can be seen that for every 5 degree increase, the system generates an annual increase of 500kWh of electricity (after 15 degrees, the increase will significantly decrease, but after exceeding the optimal inclination angle, it will actually be lower). Moreover, the above simulation has not yet taken into account the power generation loss caused by ash accumulation during low inclination installation.

建议如果不愿意采用佳倾角来安装的话，安装倾角尽可能还是高一些。如果必须平铺，建议也将倾角设计在5-10度之间。对于平屋顶来说，5-10度的角度也已经足够平了，而对于彩钢瓦屋顶来说，一般都会留有3度以上的角度，相比增加倾角的额外成本来说，顺其自然、随坡就势也是很好的选择。

It is recommended that if you are not willing to use the optimal inclination angle for installation, the installation inclination angle should be as high as possible. If it is necessary to lay flat, it is recommended to also design the inclination angle between 5 and 10 degrees. For flat roofs, an angle of 5-10 degrees is already sufficient, while for colored steel tile roofs, an angle of more than 3 degrees is generally left. Compared to the additional cost of increasing the inclination angle, letting nature take its course and following the slope is also a good choice.

本文由租赁屋顶安装光伏提供帮助，更多的相关内容请点击 //tianjibiotech.com希望本文能够为您带来帮助，感谢您的阅读！

This article provides assistance in installing photovoltaic systems on rental rooftops. For more related content, please click on //tianjibiotech.com I hope this article can be helpful to you. Thank you for reading!