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EN-Rev IM/GN-BM-EN/2.1 Copyright © April, 2022. CSI Solar Co., Ltd.
www.csisolar.com
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 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 stated on the module
nameplate, 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 or
more strings can be connected in parallel if an
appropriate and certified over-current protection
device is installed in series within each string. And it
shall be ensured in the PV system design that the
reverse current of any particular string is lower than the
module maximum fuse rating at any circumstances.
Only modules with similar electrical parameters should
be connected in the same string 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 A.
Modules should be safely fixed to bear all expected
loads, including wind and snow loads.
After the installation of double glass modules, a 30 mm
deflection for framed module is allowed.
For framed modules, a minimum clearance of 6.5 mm
(0.25 in) between modules is required to allow thermal
expansion of the frames and modules.
The tolerance of PV modules on datasheet should be
considered when installing PV modules.
OPTIMUM ORIENTATION AND TILT
To maximize the annual yield, please calculate the
optimum orientation and tilt for PV modules in that
specific installation site. The highest yields are achieved
when sunlight shines perpendicularly onto the PV
modules.
AVOID SHADING
Modules shall not be permanently shaded (including
partial shading, spot shading, even shading or uneven
shading) under any circumstances. Permanent shading
includes shading of the same cell, cell row, or module
portion for extended and repeated periods of time (e.g.
more than 200 daylight hours over the warrantied
service lifetime). Power dissipated in fully or partially
shaded cells will result in power loss, reduced yield and
can cause localized overheating, which in turn may
negatively impact the module service lifetime.
Permanent shading may cause accelerated ageing of
the encapsulation material and place thermal stress on
the bypass diodes. This would void the module’s
warranty unless properly mitigated through the use of
Module Level Power Electronic (MLPE) devices.
