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EN-Rev IM/GN-BM-EN/2.1 Copyright © April, 2022. CSI Solar Co., Ltd.
www.csisolar.com
Regular maintenance is required to keep modules clean.
Particular measures should be taken to avoid
permanent shading from dirt or debris (e.g., plants,
bird droppings, etc).
Do not install modules directly behind any object (e.g.,
tree, antenna, etc) to prevent occurrence of permanent
shading.
Even temporary partial shading will reduce the energy
yield A module can be considered to be unshaded if its
entire surface is free from shading all year round,
including on the shortest day of the year.
For optimizing the power generation of the rear side of
bifacial modules, obstacles between modules and the
mounting ground should be avoided as much as
possible
RELIABLE VENTILATION
Bifacial modules use direct, reflected, or diffuse
sunlight on the backside to generate additional power.
Therefore, bifacial modules are not suggested to be
used in building attached photovoltaic systems (BAPV).
If BAPV, or similar mounting is still required, sufficient
clearance of at least 10 cm (3.94 in) between the module
and the mounting surface needs to be provided to allow
cooling air to circulate around the back of the module.
This also allows condensation or moisture to dissipate.
According to UL 61730, 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 installed, but the system has
not been connected to the grid yet, each module string
should be kept under open-circuit conditions and
proper actions should be taken to avoid dust and
moisture penetration inside the connectors.
For double glass modules, Canadian Solar offers several
cable length options to match various system
configurations, which are shown in table 2:
On below figures, bold lines represent cable installation
pathways, while + and - connector correspond to
positive and negative module terminals respectively.
Cables should always be fastened on module frames or
mounting rails, in order to avoid shading on module
rear side.
In case where a cable connection method not included
in below table is used, please confirm suitable cable
length with Canadian Solar’s sales representative.
