9
8 Star Energy Pty Ltd | Level 35, 477 Collins Street, Melbourne VIC 3000 | https://www.energizersolar.com
8 Star Energy ESS Ltd | The Black Church, St Mary’s Place, Dublin DO7 P4AX, Ireland
Figure 4: Internal four-hole bolt installation for 72cell
Figure 5: 400mm pitch bolt installation for
72cell
In order to achieve maximum safety
precautions against wind and snow
loads, it is recommended that all
available mounting holes should be used.
Bolts are inserted as described in the process below.
Figure 6: Schematic diagram of bolt
installation process
①
Place the module on the supporting bars
underneath.
②
Insert the four stainless-steel bolts (M6) through
the holes (7x11.5mm) or stainless-steel bolts
(M8) through the holes (9x14mm) in the frame
according to the Figure 2, Figure 3, Figure 4 or
Figure 5. The 400mm pitch mounting hole size is
7x10mm, and 4 x M6 stainless steel bolts are
required (Figure 5).
③
Secure each bolt to the frame with
stainless-steel washers, one for each side of the
mounting structure; and screw on either a
stainless-steel spring washer or a toothed lock
washer. Finally, secure with a stainless steel nut.
④
The reference value of tightening torques should
be within 9~12Nm & 17~23 Nm respectively for
M6 & M8 bolts, depending on bolt class. For the
bolt grade, the technical guideline from the
fastener suppliers should be followed. For the
torque value, recommendations from specific
clamping hardware suppliers should prevail.
6.3.2 Clamping on the frame surface
Photovoltaic modules can be installed across the
support frame (Figure 7) or parallel to the frame of
the photovoltaic module (Figure 8). When using
clamps to install, each photovoltaic module must be
fixed with at least 4 clamps.
Figure 7: Rail vertical long frame
installation
