output. If the module faces 60 degrees away from true
South (or North), the power loss will be 20 to 30 percent.
When choosing a site, avoid trees, buildings or obstructions,
which could cast shadows on PV modules especially during
the winter season when the arc of the sun is lowest over the
horizon.
5. MODULE TILT ANGLE
The PV modules produce more power when they are
pointed directly at the sun.
For grid-tie installations where the PV modules are attached
to a permanent structure, PV modules should be tilted at an
angle equal to the site's latitude. This will typically result in
the highest annual energy output.
6. INSTALLING PV MODULE
A minimum spacing of 2” (50 mm) is required between the
PV module and the mounting surface around the perimeter
of PV array. The PV modules may be installed in various
applications utilizing a variety of support structure options
and attachment methods.
For optimal performance in all
applications, clearance between the module frame and the
mounting surface is required to allow cooler ambient air to
circulate around the back of the module
and to avoid
module and/or wiring damage. A minimum of .13” (3.2 mm)
spacing must also be maintained between module frames
to allow for thermal expansion.
The PV modules may be attached to a support structure by
the following methods. The structure should have enough
strength to achieve the mounting span. When installing
modules in a snowy area, an appropriate countermeasure
has to be taken to prevent possible damage to the lower
side frame by slipping snow (e.g. attach supporting parts to
the lower side frame of modules.). Any damage caused by
snow or such countermeasures is not covered under
warranty.
BOLTING
: Use 5/16”(8mm) stainless steel
(or equivalent in
corrosion resistance) hardware through the existing .35”x.37”
(9×9.5mm)
slotted mounting holes in the module frame and
then through the holes on the support structure. Tighten the
screws with adequate torque (usually 132 in-lb; refer
structure manufacturer specifications). Refer to the module
drawings (Section 12) for the position of mounting holes.
CLAMPING
: Fasten modules firmly using clamps which will
not be deformed by wind load or snow load. Clamps should
be attached to support structure with 1/4” (6mm) or larger
bolt and nut with adequate torque (usually 71 in-lb; refer
structure manufacturer specifications). Bolt and nut should
be stainless steel or equivalent in corrosion resistance.
Support structure should support the bottom of module at
least
.39” (10mm) width or overlap. Clamps must not bend
the module frame nor damage the surface of the frame.
Clamps also must not shade the sunlight incidence on glass
surface. Take measures to prevent module from falling off
clamps. Refer to the ‘CLAMPING AREA’ in the Module
drawings (Section 12) for the permissible clamping range.
CONTINUOUS CLAMPING
:
Continuous clamping means mounting PV module by two
long clamps which cover overall length of the module frame.
Fasten modules firmly using continuous clamps which will
not be deformed by wind load or snow load. Support
structure should support the bottom of module at least
.39”
(10mm) overlap. Clamps must not bend the module frame
nor damage the surface of the frame. Clamps also must not
shade the sunlight incidence on glass surface. Take
measures to prevent module from falling off clamps. If there
is clearance between clamp and module side face, take
measures to prevent module from moving or falling off (e.g.
put plastic parts into clearance.). Refer to the
‘CONTINUOUS CLAMPING AREA’ in the Module drawings
(Section 12) for the permissible clamping range.
The clamp specification is below;
A- SUS304 or equivalent
t: thickness
L: width
a: overlap
0.079" (2.0mm)
and over
min. 1.93"
(49mm)
0.098" (2.5mm)
and over
min. 1.34"
(34mm)
0.12" (3.0mm)
and over
min. 0.94"
(24mm)
Long side clamping;
min. 0.20" (5mm)
short side clamping;
min. 0.35" (9mm)
B-anodized aluminum AL6063-T5 or equivalent
t: thickness
L: width
a: overlap
0.079"
(2.0mm)
and over
frame
length
min. 0.28 "
(7mm)
0.12"
(3.0mm)
and over
min.
1.50"
(38mm)
0.14"
(3.5mm)
and over
min.
1.18"
(30mm)
0.16"
(4.0mm)
and over
min.
0.98"
(25mm)
Long side clamping;
min. 0.20" (5mm)
Short side clamping;
min. 0.35" (9mm)
The clamp shape and dimensions above are for reference
only, and any damage caused by clamps is not covered
under warranty.
7. MODULE WIRING
The PV module comes pre-wired. Each module has two #12
AWG type PV-wire stranded sunlight resistant output
cables each terminated with SMK R51-7/P51-7 (MC4
compatible) connectors. The positive (+) terminal has a
male connector while the negative (-) terminal has a female
connector. The module wiring is solely for series
connections only, i.e. male (+) to female (-) interconnections.
Series and/or parallel connections shall be made with
#10-14 AWG type PV-wire stranded output cables, having
sunlight resistant and temperature rating of 90
℃
minimum,
with SMK R51-7/P51-7
(or MC4: PV-KST4/KBT4)
connectors.
NOTE:
When making connections with the connectors,
make sure the array is disabled.
DO NOT MAKE
CONNECTIONS WHILE UNDER LOAD.
Module output
connections are marked “Do not disconnect under load”.
NOTE: MAXIMUM SYSTEM VOLTAGE IS 600 VDC.
The PV module and most PV system components have a
maximum system voltage rating of 600 volts DC. Some
grid-tie systems operate at or near this voltage rating. Like
other polycrystalline PV modules, the open-circuit voltage
of the PV modules increases as the ambient temperature
decreases. Maximum system voltage is computed as the
a
t
L
