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sulfur (i.e. sulfur sources, volcanoes) incurs the risk of
module corrosion.
· Failure to comply with these instructions will void
Canadian Solar Inc. warranty.
INSTALLATION REQUIREMENTS
· Ensure that the module meets the general technical
system requirements.
· Ensure that other systems components do not damage
the module mechanically or electrically.
· Modules can be wired in series to increase voltage or
in parallel to increase current. To connect modules in
series, connect the cables from the positive terminal of
one module to the negative terminal of the next module.
To connect in parallel, connect the cables from the
positive terminal of one module to the positive terminal
on the next module.
· The quantity of bypass diodes in the module’s junction
box provided may vary depending on the model series.
· Only connect the quantity of modules that corresponds
to the voltage specifications of the inverters used in the
system. In addition, modules must not be connected
together to create a voltage higher than the maximum
permitted system voltage, even under the worst local
temperature conditions (see Table 1 for the correction
coefficients that apply to open-circuit voltage).
· A maximum of two strings can be connected in parallel
without using an over-current protection device (fuses,
etc.) incorporated in series within each string. Three
of more strings can be connected in parallel if an
appropriate and certified over-current protection device
is installed in series within each string.
· Only modules with similar electrical outputs should
be connected in the same series to avoid or minimize
mismatch effects in arrays.
· To minimize risk in the event of an indirect lightning
strike, avoid forming loops with the wiring when
designing the system.
· The recommended maximum series fuse rating is stated
in a table in the Annex.
· Modules should be safely fixed to bear all expected
loads, including wind and snow loads.
· A minimum clearance of 6.5 mm (0.25 in) between
modules is required to allow for thermal expansion of
the frames.
· The small drainage holes on the underside of the module
must not be blocked.
OPTIMUM ORIENTATION AND TILT
· To maximize your annual yield, find out the optimum
orientation and tilt for PV modules in your region.
The highest yields are achieved when sunlight shines
perpendicularly onto the PV modules.
AVOID SHADING
· Even minor partial shading (e.g. from dirt deposits)
reduces yields. A module can be considered to be
unshaded if its entire surface is free from shading all
year round. Sunlight should be able to reach the module
even on the shortest day of the year.
· Constant shading conditions can affect module service
lifetime, due to accelerated ageing of the encapsulation
material and thermal stress on the bypass diodes.
RELIABLE VENTILATION
· Sufficient clearance (at least 10 cm (3.94 in)) between
the module frame and the mounting surface is required
to allow cooling air to circulate around the back of the
module. This also enables condensation or moisture to
dissipate.
· According to UL 1703, any other specific clearance
required for maintaining a system fire rating should
prevail. Detailed clearance requirements pertaining to
system fire ratings must be provided by your racking
supplier.
5.1
MODULE WIRING
CORRECT WIRING SCHEME
· Ensure that the wiring is correct before starting up the
system. If the measured open circuit voltage (Voc) and
short-circuit current (Isc) differ from the specifications,
this indicates that there is a wiring fault.
· When modules have been pre-installed but the system
has not been connected to the grid yet, each module
string should be kept under open-circuit conditions