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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
EN-Rev IM/GN-EN/1.2 Copyright © April, 2023. CSI Solar Co., Ltd.
attached photovoltaic systems (BAPV).
Sufficient clearance of at least 10.2 cm (4.0 in) between the
module bottom side and the surface of roof or wall needs
to be provided to allow cooling air to circulate around the
back of the module. This also allows condensation or
moisture to dissipate. In particular, the minimum clearance
of any modules applied in BWh area (please refer to Annex
A Figure A.2) should be determined by Canadian Solar's
technical service team.
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
Cable management scheme should be reviewed and
approved by the EPC contractor. Required cable lengths
should be cross-checked and account for tracker structure
particularities e.g. bearing house gaps. If longer cables or
additional jumper cables are required, please contact
Canadian Solar's sales representative in advance.
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
configurations, in case a jumper cable is needed, please
contact your Canadian Solar sales representative.
Cables should always be fastened on module frames or
mounting rails, in order to avoid shading on the rear side of
bifacial modules.
The cable lengths assume the purlin or rail fixing the
modules not to be too much protruding from the back side
of the module. Should it be greater, an extension cable will
to
match
various
system
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