| 8
EN-Rev IM/GN-AM-EN/2.71 Copyright © June, 2021. CSI Solar Co., Ltd.
www.csisolar.com
The small drainage holes on the underside of the
module must not be blocked.
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
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 at least 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 102 mm (4.02 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 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
Cable management scheme should be reviewed and
approved by the EPC contractor; in particular required
cable lengths should be cross-checked considering the
specificities of the tracker structure like bearing house
gaps. If longer cable or additional jumper cable is
requested, 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 pre-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.
Do not connect different connectors (brand and model)
together.
In case where a cable connection method not included
in the below table is used, please confirm the suitable
cable length with Canadian Solar’s sales representative.
For different CSI module types, Canadian Solar offers
optional cable specifications lengths to match various
system configurations. Recommended system cable
schemes are shown in table 2 & 3 below
