D84-P06-01 GB R3
21/04/2021
www.photowatt.com
12
6.1
MOUNTING METHODS FOR FRAMED BIFACIAL
MODULE (BOLTING)
•
The mechanical load test with these mounting meth-
ods were performed according to IEC 61215.
•
Modules should be bolted to support structures through
the mounting holes in the rear frame flanges only.
•
Each module must be securely fastened at a mini-
mum of 4 points on two opposite sides.
•
M8 X 1.25 (5/16”) bolt and nut should be used.
•
Plain washer size should be M8 with outer diameter
16 mm.
•
The yield strength of bolt and nut should not be less
than 450 MPa.
NOTICE
Suitable bolt length should be chosen based on actual
module frame height. For bifacial module with 30 mm
frame height, our recommended maximum bolt length is
20 mm in order to properly insert the bolts through the
mounting hole. The system designer is responsible to
check that the racking supplier specified bolt length com-
ply with above requirement and will not affect installation.
•
Tightening torques should be within 16~20 Nm
(11.8~14.75 ft-lbs) for M8 (5/16”) coarse thread bolts,
depending on bolt class.
•
In areas with heavy wind loads, additional mount-
ing points should be used. The system designer and
the installer are responsible for calculating the load
and ensuring that the support structure meets the
requirements.
•
Modules should be bolted at the following hole
locations depending on the configuration and load:
Mounting method: Bolting
