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x M6 stainless steel bolts are required (Figure
5).
Secure
each
bolt
③
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.
The reference value of tightening torques should
④
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.
6.5 Clamping on the frame surface
Photovoltaic modules can be installed across the
support frame (Figure 11) or parallel to the frame of
the photovoltaic module (Figure 12). When using
clamps to install, each photovoltaic module must be
fixed with at least 4 clamps.
Figure 11: Rail vertical long frame
installation
Figure 12: Rails overlapping for the
short-side of frame
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13
8 Star Energy ESS Ltd | The Black Church, St Mary's Place, Dublin DO7 P4AX, Ireland
to
the
frame
with
Figure 13: Four clamp mounting on short
side of frame.
The length of supporting bars must be
longer than the length of module frame,
otherwise please confirm with our
product team to get approval.
The above three diagrams show the installation
•
method using aluminum clamps (also called
fixtures). "D" indicates the allowable installation
range of the aluminum press block. Please refer
to Table 2 for the specific recommended
installation location and corresponding load
("---" indicates that the photovoltaic module
does not apply to the above installation
methods).
•
Each aluminum pressure block is equipped with
an M8 bolt, a flat washer, a spring washer and
an M8 nut. The fixing steps are as follows:
Place the module on the two supporting bars (not
①
provided). The bars should be made with
stainless
material
anti-corrosion
process
galvanizing). Each PV module needs at least four
clamps to fix. Do not make the clamp have
contact with the glass directly and do not make
the aluminum frame distort as part of the
installation process. Avoid shadowing of the solar
PV modules, otherwise this may affect the
modules operation or performance.
Be sure to avoid shadowing effects from the
②
module clamps. Weep holes on the module frame
must not be closed or obscured by the clamps.
and
treated
with
(e.g.,
hot
dipped
an
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