www.znshinesolar.com
Document No.
：
QES/ZX-RD-III032A
- 11
5.4
、
INSTALLATION REQUIREMENTS FOR BIFACIAL CELLS MODULE
Under the certain installation conditions, the backside of bifacial cells module will also generate electricity
power after receiving the reflected light, which will bring additional power generation gain to the power station
system.
The shading on the module surface will affect the power generation much, the module should be installed in
the place where the module cannot be shadowed totally (such as the shadow from building, chimney and tree
etc.), and even the partially shading (such as the dirt, snow and aerial wire etc.) should be avoided.
The generation gain is related to the ground reflectivity, the module installation height to the ground, the array
spacing and the shadow shading to the module backside.
Generally speaking, the reflectance is various with the different ground (See table 5-3), and this will lead to
different power generation gain.
Table 5-3 reflectivity of different surfaces
The ground type
Water
Grassland
Ground
Concrete
Sand
Snow
Reflectivity range
（
%
）
5-12
12-25
20-33
20-40
20-40
80-85
Due to the different ground clearance height will affect the power generation gain, it is recommended to install
the module at a height from 0.5m to 2m. See Fig. 5-2.
Fig. 5-2 Distance from the earth
In the system design, besides the ground type and the module installation height to ground, the proper array
spacing and how to avoid shadow shading on the back need to be considered too, please consult with the
professional system designer.
5.5
、
INSTALLATION METHOD
5.5.1 MECHANICAL INSTALLATION AND WARNING
PV modules can be installed through bolt method and clamp method.The modules must be installed
according to the following examples and recommendations. If a different installation method is desired, please
contact ZNSHINE SOLAR customer service or technical support team for consultation. Improperly mounted
modules maybe damaged. If alternative mounting method is used that has not been approved by ZNSHINE
SOLAR, the modules will not continue to carry a valid warranty.
Modules shall not be subjected to wind or snow loads which is exceeding the maximum permissible designed
loads, and shall not be subjected to excessive forces due to the thermal expansion of the support structures. The
selection and design of mounting bracket shall be carried out by professional system engineers after the load
calculation according to the climatic conditions of the installation site.
The modules depicted are mounted on continuous rails that extend beneath the modules. If modules are
