Recommended accessories are as below :
19
Suggestion :
（
1
）
M8 bolt tightening torque range: 12-16 N•m; M6 bolt tightening torque range: 8-12 N•m;
（
2
）
When using LONGi 30mm (30H) height frame module, it is recommended to select L ≤ 20mm length
fasteners. (If there is a special model, consult LONGi customer service personnel);
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
Figure 7 Bolt Installation of Bifacial Module
400mm
4 400mm-span
installation holes
Use M6 bolts
8 installation holes
(4 inner, 4 outer)
Use M8 bolts
Accessories
Model
Material
Note
Bolt
M8 (full thread
recommended)
M6 (full thread
recommended)
Q235B/SUS304
Accessories
material selection
should be based
on application
environment.
Washer
2pcs, thickness≥1.5mm
and outside
diameters=16mm
2pcs, thickness≥1.5mm and
outside diameters
=12-16mm
Q235B/SUS304
Spring Washer
8
6
Q235B/SUS304
Nut
M8
M6
Q235B/SUS304
(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.
