Figure 8 Clamp Installation of Bifacial Module
5.3.2 Clamps Installation
See details in Figure 8. The clamp shall not be in touch with glass or deform module frame in any case. The interface of
the clamp and frame front side shall be flat and smooth to prevent frame and module from being damaged.
Make sure that these has no shadow caused by clamps.
The drain holes of module cannot be blocked by clamps. For framed PV module, the clamp must overlap the module
frame at least 8 mm (0.32 inch) but no more than 11 mm (0.43 inch). The cross section of clamp can be adjusted if the
module is securely fastened. For frameless PV module, the clamp must overlap the module frame at maximum 15 mm
5.3.3 Installation and Mechanical Load of Bifacial Module
Bifacial modules can be mounted by bolts or clamps. The mounting method and maximum test load are shown as follow.
(The unit of distance and length in the table below is millimeter (mm), and the unit of pressure is Pascal (pa)).
Framed PV Module
Frameless PV Module
Bolt
Lower side clamp
Bracket
Upper side clamp
Bolt
Lower side clamp
Frameless module
Bracket
Upper side clamp
EPDM
EPDM
20
(0.59 inch). The applied value of torque should refer to mechanical design standard and the bolt type customer is using,
for example: M8: 14-18 N•m.
