Recommended accessories are as below :
Figure4 Bolt Installation of Mono-facial Modules
14
5.2.1 Bolts Mounting
LONGi modules come standard with 8 mounting holes matching M8 bolts (marked by the blue dashed box in the figure
below, according to the location distribution hereinafter referred to as inner four holes and outer four holes); 72 type and
some 66 type modules have additional 4 mounting holes matching M6 bolts (marked by the red circle in the figure below,
400mm holes for short), which are used for matching with the tracking bracket system products from manufacturers such
as NEXTracker. Apply bolts to fix modules on the bracket through mounting holes on the back-side frame. See details in
Figure 4.
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);
5.2.2 Clamp Mounting
The module can be mounted by a dedicated clamp, as shown in Figure 5.
Under no circumstances should the clamp touch the glass or deform the frame. The interface of the clamp to the front of
the frame must be smooth and flat to prevent frame or other components 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 maintain an overlap of 8-11 mm with the frame of the module (you can change
the cross section of the clamp if the module is securely installed). For frameless PV module
，
the clamp must maintain an
overlap of 15 mm at maximum with the module. 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.
400mm
8 installation holes
(4 inner, 4 outer)
Use M8 bolts
4 400mm-span
installation holes
Use M6 bolts
Bolt
Washer
Washer
Aluminum frame
Bracket
Spring washer
Nut
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
