CanadianSolar CS6R-MB-AG User manual

For professional use only
INSTALLATION
MANUAL OF DOUBLE
GLASS MODULE

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CONTENTS
1.0 GENERAL INFORMATION ............................................................................................................................................................. 3
1.1 INSTALLATION MANUAL DISCLAIMER ....................................................................................................................................... 3
1.2 LIMITATION OF LIABILITY ........................................................................................................................................................... 3
2.0 SAFETY PRECAUTIONS .................................................................................................................................................................. 3
3.0 MECHANICAL / ELECTRICAL SPECIFICATIONS ........................................................................................................................... 4
4.0 UNPACKING AND STORAGE ......................................................................................................................................................... 5
5.0 MODULE INSTALLATION .............................................................................................................................................................. 6
5.1 MODULE WIRING .......................................................................................................................................................................... 9
5.2 GROUNDING ................................................................................................................................................................................ 12
6.0 MOUNTING INSTRUCTIONS ...................................................................................................................................................... 13
6.1 MOUNTING METHODS: BOLTING.............................................................................................................................................. 14
6.2 MOUNTING METHODS: CLAMPING........................................................................................................................................... 16
6.3 INSERTION SYSTEMS .................................................................................................................................................................. 20
6.4 MOUNTING METHODS (SINGLE-AXIS TRACKER) ..................................................................................................................... 21
7.0 MAINTENANCE ............................................................................................................................................................................ 23
8.0 Module Cleaning Guidelines ..................................................................................................................................................... 23
ANNEX A: MECHANICAL AND ELECTRICAL RATINGS .................................................................................................................... 25
ANNEX B: GUIDANCE ON MODULE TEMPERATURE FOR SEVERAL LOCATIONS .......................................................................... 28
ANNEX C: COASTAL AREA ANTI-CORROSION INSTALLATION GUIDELINES ............................................................................... 29
AMENDED EDITIONS AND DATES .................................................................................................................................................... 33

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1.0 GENERAL INFORMATION
This general manual provides important safety
information relating to the installation, maintenance and
handling of double glass solar modules.
Professional installer must read these guidelines carefully
and strictly follow these instructions. Failure to follow
these instructions may result in death, injury or property
damage. The installation and handling of PV modules
require professional skills and should only be performed
by qualified professionals. The installers must inform end-
users (consumers) the aforesaid information accordingly.
The word “module” or “PV module” used in this manual
refers to one or more double glass solar modules. This
manual is valid for the bifacial double glass module types
CS3W-PB-AG, CS3W-MB-AG, CS3Y-MB-AG, CS3Y-PB-AG,
CS6W-MB-AG,CS6R-MB-AG ，CS7N-MB-AG, CS7L-MB-AG,
and monofacial double glass module types CS6R-H-AG
and CS6RA-H-AG. Please retain this manual for future
reference.
We recommend visiting www.csisolar.com regularly for
the most updated version of double glass module
installation manual.
1.1 INSTALLATION MANUAL DISCLAIMER
The information contained in this manual is subject to
change by Canadian Solar without prior notice. Canadian
Solar gives no warranty of any kind whatsoever, either
explicitly or implicitly, with respect to the information
contained herein.
In the event of any inconsistency among different
language versions of this document, the English version
shall prevail. Please refer to our product lists and
documents published on our website at:
www.csisolar.com as these lists are updated on a regular
basis.
1.2 LIMITATION OF LIABILITY
Canadian Solar shall not be held responsible for damages
of any kind, including – without limitation – bodily harm,
injury or damage to property, in connection with handling
PV modules, system installation, or compliance or non-
compliance with the instructions set forth in this manual.
2.0 SAFETY PRECAUTIONS
Warning
Before attempting to install, wire, operate
and/or service the module and other
electrical equipment, all instructions should be read and
understood. PV module connectors pass direct current
(DC) when exposed to sunlight or other light sources.
Contact with electrically active parts of the module, such
as terminals, can result in injury or death, irrespective of
whether or not the module and the other electrical
equipment have been connected.
Avertissement
Toutes les instructions devront être lues et
comprises avant de procéder à l’installation,
le câblage, l’exploitation et/ou l’entretien des panneaux.
Les interconnexions des panneaux conduisent du courant
continu (CC) lorsque le panneau est exposé à la lumière
du soleil ou à d’autres sources lumineuses. Tout contact
avec des éléments sous tension du panneau tels que ses
bornes de sortie peut entraîner des blessures ou la mort,
que le panneau soit connecté ou non.
General Safety
All modules must be installed by licensed electricians in
accordance to the applicable electrical codes such as, the
latest National Electrical Code (USA) or Canadian Electric
Code (Canada) or other national or international
applicable electrical codes.
Protective clothing (non-slip gloves, clothes,
etc.) must be worn during installation to
prevent direct contact with 30 V DC or
greater, and to protect hands from sharp
edges.
Prior to installation, remove all metallic
jewelry to prevent accidental exposure to
live circuits.
When installing modules in light rain,
morning dew, take appropriate measures
to prevent water ingress into the

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connector.
Do not allow children or unauthorized
persons near the installation site or
module storage area.
 Use electrically insulated tools to reduce the risk of
electric shock.
 If the disconnects and over current protection devices
(OCPDs) cannot be opened or the inverter cannot be
powered down, cover the fronts of the modules in the
PV array with an opaque material to stop the
production of electricity when installing or working on
a module or wiring.
 Do not install modules in strong wind.
 Do not use or install broken modules.
 Do not contact module surface if the front or rear glass
is broken. This may cause electric shock.
 Do not attempt to repair any part of the module. The
PV module does not contain any serviceable parts.
 Do not open the cover of the junction box at any time.
 Do not disassemble a module or remove any module
part.
 Do not artificially concentrate sunlight on a module.
 Do not connect or disconnect modules when current
from the modules or an external source is present.
3.0 MECHANICAL / ELECTRICAL
SPECIFICATIONS
Module electrical ratings are measured under Standard
Test Conditions (STC) of 1000 W/m2 irradiance, with an
AM1.5 spectrum, and a cell temperature of 25°C. Detailed
electrical and mechanical characteristics of Canadian
Solar crystalline silicon PV modules can be found in Annex
A (Module Specifications) on www.csisolar.com. Main
electrical characteristics at STC are also stated on each
module label. Please refer to the datasheet or the product
nameplate for the maximum system voltage.
Under certain conditions, a module may produce more
current or voltage than its Standard Test Conditions rated
power. As a result, the module short-circuit current under
STC should be multiplied by 1.25, and a correction factor
should be applied to the open-circuit voltage (see Table 1
below), when determining component ratings and
capacities.
Table 1: Low temperature correction factors for open-
circuit voltage
Lowest Expected
Ambient Temperature
(°C/°F)
Correction Factor
24 to 20 / 76 to 68 1.02
19 to 15 / 67 to 59 1.04
14 to 10 / 58 to 50 1.06
9 to 5 / 49 to 41 1.08
4 to 0 / 40 to 32 1.10
-1 to -5 / 31 to 23 1.12
-6 to -10 / 22 to 14 1.14
-11 to -15 / 13 to 5 1.16
-16 to -20 / 4 to -4 1.18
-21 to -25 / -5 to -13 1.20
-26 to -30 / -14 to -22 1.21
-31 to -35 / -23 to -31 1.23
-36 to -40 / -32 to -40 1.25
Alternatively, a more accurate correction factor for the
open-circuit voltage can be calculated using the following
formula:
𝐂Voc = 𝟏 − 𝜶𝑽𝒐𝒄 × (𝟐𝟓 − 𝐓)
T (°C) is the lowest expected ambient temperature at the
system installation site.
αVoc (%/°C) is the voltage temperature coefficient of the
selected module (refer to corresponding datasheet).
OCPD rating selection should be done per the following
guidance, where the minimum OCPD rating possible is
determined by calculating the expected maximum circuit
current for the PV system, and the maximum OCPD rating
constrained by the IEC 61215: 2016 and UL61730 standard
requirements for the certified PV modules.
Minimum string fuse rating < X ≤ Maximum string fuse
rating.
The maximum string fuse ratings can be found in ANNEX
A: Mechanical and Electrical Ratings for all the certified
Canadian Solar double glass module types.

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The minimum string fuse rating for compliance with NEC:
2017 code and IEC 62548: 2016 requirement is suggested
to be determined as follows:
Minimum string fuse rating = IscSTC x 1.25 x Max (1.175,
Imppα ÷ ImppSTC).
Imppα = the highest 3-hour current average resulting
from the simulated local simultaneous irradiances on
the front and rear sides of the PV array accounting for
elevation and orientation.
IscSTC = the listed short circuit current at 0% bifacial gain
on the PV module datasheet or nameplate label.
ImppSTC = the listed MPP operating current at 0%
bifacial gain on the PV module datasheet or nameplate
label.
An assembly, together with its overcurrent device(s), that
is listed for continuous operation at 100 percent of its
rating shall be permitted to be used at 100 percent of its
rating, and therefore shall not require the additional 1.25
multiplier.
Electrical calculations and design must be performed by a
competent engineer or consultant.
Please contact Canadian Solar’s technical support team
for additional information pertaining to engineering
optimization and approval of project specific module
string lengths.
4.0 UNPACKING AND STORAGE
PRECAUTIONS
 Modules should be stored in a dry and ventilated
environment to avoid direct sunlight and moisture. If
modules are stored in an uncontrolled environment,
the storage time should be less than 3 months and
extra precautions should be taken to prevent
connectors from being exposed to moisture or sunlight,
like using connector endcaps. Protect the package from
damage. In any circumstances, pallets with landscape-
oriented module packaging shall not be stacked
vertically more than two high; and for pallets with
portrait-oriented module packaging, stacking is not
allowed
When unloading module pallets from a
flatbed truck, please use a crane or a
forklift to remove the module pallets.
When unloading module pallets from containers, please
use a fork lift to remove the module pallets from the
container or trailer. Do not move any pallets within the
container or trailer without properly lifting them first. The
forklift should be close to the ground in order to avoid the
top of module pallets from touching the top of the cabinet
door. For CS6W-MB-AG modules, the thickness of forklift
blades should be less than 75 mm and the length of the
forklift blades should be longer than 2300 mm when
unloading the pallets from short side. For unloading
pallets of CS7N-MB-AG and CS7L-MB-AG modules, the
thickness of the forklift blades should be less than 75 mm,
the length of the forklift blades should be longer than
1250 mm and the distance between the forklift blades
should be wider than 600 mm (from middle to middle of
the forklift blades). Consult your Canadian Solar
representative for more detailed unloading instructions.
 Unpack module pallets carefully, following the steps
shown on the pallet. Unpack, transport and store the
modules with care.
 Modules must always be unpacked and installed by two
or three people. Always use both hands when handling
modules with gloves.
For modules vertically packed (CS7L and
CS7N), one person must be present to
prevent the unpacked modules from

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falling during the unpacking process. Please use an
anti-tipping structure. Such structure can be built with
the pallet’s own wooden frame according to the
instructions below:
 During unpacking, the unpacked modules should be
properly fixed. After unpacking, it is recommended to
place the remaining un-installed modules horizontally
on a pallet, not exceeding the total number of 12
modules in one stack. Visit our website or contact your
Canadian Solar representative for more detailed
unpacking requirements.
 Do not lift modules by their wires or junction box, lift
them by the frame.
 Do not allow the panels to sag or bow under their own
weight when being carried.
 Stacking of modules should be limited to no more than
12 modules and frames should be aligned with one
another on the pile.
 Do not place excessive loads on the module or twist the
module.
 Do not carry modules on your head.
 Do not drop or place objects (such as tools) on the
modules.
 Do not use sharp instruments on the modules.
 Do not leave modules unsupported or unsecured.
 Do not stand, step, walk and/or jump on modules
under any circumstances. Localized heavy loads may
cause severe micro-cracks at cell level, which in turn
may compromise module reliability and void Canadian
Solar’s warranty.
 Do not change the wiring of bypass diodes.
 Keep all electrical contacts clean and dry at all times.
 Do not expose the modules and its electrical contacts
to any unauthorized chemical substance (e.g. oil,
lubricant, pesticide, etc.).
PRODUCT IDENTIFICATION
Each module has three identical barcodes (one in the
laminate under the front glass, the second on the rear
side of the module and the third on the frame) that act as
a unique identifier. Each module has a unique serial
number containing 14 digits or 16 digits.
A nameplate is also affixed to the rear of each module.
This nameplate specifies the model type, as well as the
main electrical and safety characteristics of the module.
5.0 MODULE INSTALLATION
PRECAUTIONARY MEASURES AND
GENERAL SAFETY
 Prior to installing modules, please obtain
information about any requirements and necessary
approvals for the site, installation and inspection from
the relevant authorities.
 Check applicable building codes to ensure that the
construction or structure (roof, facade, support, etc.)
can bear the module system load.
 Canadian solar modules have been qualified for
Application Class A (equivalent to Safety Class II
A
nti
-
tipping
system

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requirements). Modules rated under this class should
be used in systems operating at voltage above 50V or
power above 240W, where general contact access is
anticipated.
 Canadian Solar double glass modules have been
certified as Type 29 according to UL 61730 and as Class
A or Class C for fire performance according to IEC
61730-2 for fire class performance, please refer to the
datasheet or the product nameplate for the detailed
types.
 Consult your local authority for guidelines and
requirements for building or structural fire safety.
UL 61730 SYSTEM FIRE RATING REQUIREMENTS
 The fire rating of this module is only valid when the
product is installed as specified in the mechanical
mounting instructions.
 When installing the modules, ensure the assembly is
mounted over a fire-resistant roof covering rated for
the application.
 Photovoltaic systems composed of UL 61730 certified
modules mounted on a UL 2703 certified mounting
system should be evaluated in combination with roof
coverings in accordance with UL 61730 standard, with
respect to meeting the same fire classification as the
roof assembly.
 Mounting systems with a System Fire Class Rating
(Class A, B or C), tested in conjunction with fire rated
“Type 29” rated modules, are considered acceptable for
use with Canadian Solar modules, provides the
mounting system does not violate any other
requirements of this manual.
 Any mounting system limitations on inclination or
accessories required to maintain a specific System Fire
Class Rating should be clearly specified in the
installation instructions and UL 2703 certification of the
mounting system supplier.
ENVIRONMENTAL CONDITIONS
 PV modules are intended for use in general open-air
climates, as defined in IEC 60721-2-1: Classification of
environmental conditions Part 2-1: Environmental
conditions appearing in nature. Temperature and
humidity.
 It is recommended that PV modules be installed in an
environment with ambient temperature ranges from -
40 °C to + 40 °C.
 The 98th-percentile of the module operational
temperature must be of 70 °C or lower under any
mounting conditions.
 This environmental temperature range encompasses
many locations and installation methods. Annex B
provides the reader with modelled PV module
temperature examples, at the 98th-percentile
depending on the different mounting method and
worldwide locations.
 Please consult the Canadian Solar technical support
department for more information on the use of
modules in special climates, such as an altitude greater
than 2000m, heavy snow, severe hail storm, hurricane,
etc.
 Do not install modules near open flames or flammable
materials.
 Do not immerse modules in water or constantly expose
modules to water (either fresh or salt, i.e. from
fountains, sea spray).
 Exposing modules to salt (i.e. marine environments) or
sulfur (i.e. sulfur sources, volcanoes) incurs the risk of
module corrosion.
 Do not expose modules and their connectors to any
unauthorized chemical substances (e.g. oil, lubricant,
pesticide, etc.), as modules may incur damages.
 Canadian solar modules have passed salt mist
corrosion resistance test according to IEC 61701, but
the corrosion may still occur on where the modules
frame is connected to the bracket or where the
grounding is connected. Should the installation location
be near the ocean, Canadian solar recommends
stainless steel or aluminum materials be used in the
areas with direct contact with the PV modules, and the
connection point should be protected with anti-
corrosion measures. For more information, please
contact Canadian solar technical support team.

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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.

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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 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.

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Table 2: System Cable Scheme for CS3W, CS3U, CS3Y, CS3K, CS6W, CS6R, CS6RA, CS7N and CS7L modules
Module types Recommended wiring configurations
CS3W-PB-AG,
CS3W-MB-AG,
CS3Y-PB-AG,
CS3Y-MB-AG,
CS6R-H-AG,
CS6RA-H-AG,
CS6W-MB-AG,
CS6R-MB-AG
CS7N-MB-AG,
CS7L-MB-AG
Landscape installation two rows:
CS3W/CS3Y/CS6W/CS7L/CS7N Cable length option = 1400 mm
CS6R Cable length option = 1100 mm
CS6RA Cable length option = 950 mm
Note: Adjacent modules in the same row need to be rotated 180 degrees for proper
installation.
Portrait installation one row:
CS3W Cable length per lead = 400 mm (+), 280 mm (-)
CS3Y/CS6W Cable length per lead = 410 mm (+), 290 mm (-)
CS7L/CS7N Cable length per lead = 460 mm (+), 340 mm (-)
CS6R/CS6RA Cable length per lead = 410(+), 290(-)
CS3W-PB-AG,
CS3W-MB-AG,
CS3Y-MB-AG,
CS3Y-PB-AG,
CS6R-H-AG,
CS6RA-H-AG,
CS6W-MB-AG,
CS6R-MB-AG
CS7N-MB-AG,
CS7L-MB-AG
Portrait installation two rows:
CS3W Cable length = 400 mm (+), 280 mm (-) & 1800 mm jumper cable
CS3Y/CS6W Cable length = 410 mm (+), 290 mm (-) & 2000 mm jumper cable
CS7L Cable length = 460 mm (+), 340 mm (-) & 2000 mm jumper cable
CS7N Cable length = 460 mm (+), 340 mm (-) & 2150 mm jumper cable
CS6R Cable length = 410 mm (+), 290 mm (-) & 1500 mm jumper cable
CS6RA Cable length = 410 mm (+), 290 mm (-) & 1100 mm jumper cable
Note: Modules in adjacent rows need to be rotated 180 degrees for proper installation.

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CS3W-PB-AG,
CS3W-MB-AG,
CS3Y-MB-AG,
CS3Y-PB-AG
CS6W-MB-AG
Portrait installation one row: (Leap-frog for single-axis tracker)
CS3W/CS3Y Cable length = 1850 mm (+), 1850 mm (-)
CS6W Cable length = 2000 mm (+), 2000 mm (-)
The maximum distance between two adjacent module frames should be within 50 mm (1.96 in) for the side with mounting
clamps, and within 25 mm (0.98in) for the side without mounting clamps, in order to meet the system cable scheme.

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CORRECT CONNECTION OF CONNECTORS
 Make sure that all connections are safe and properly
mated. The PV connector should not be subject to stress
from the exterior. Connectors should only be used to
connect the circuit. They should never be used to turn
the circuit on and off.
 Connectors are not waterproof when unmated. When
installing modules, connector should be connected to
each other as soon as possible or appropriate measures
(like using connector endcaps) should be taken to avoid
moisture and dust penetrating into the connector.
 Do not connect different connectors (brand and model)
together.
 Do not clean or precondition the connectors using
lubricants or any unauthorized chemical substances.
 For CS6R and CS6RA modules, do not short-circuit the
modules before full operation.
USE OF SUITABLE MATERIALS
 Only use dedicated solar cable and suitable connectors
(wiring should be sheathed in a sunlight-resistant
conduit or, if exposed, should itself be sunlight-
resistant) that meet local fire, building and electrical
regulations. Please ensure that all wiring is in perfect
electrical and mechanical condition.
 Installers may only use single-conductor cable listed
and labeled as PV wire which is 90°C wet rated in North
America, and single conductor cable with a cross
section area of at least 4 mm² (12 AWG), 90°C wet rated
in other areas (i.e. IEC 62930: 2017 approved), with
proper insulation which is able to withstand the
maximum possible system open-circuit voltage. For
CS7N and CS7L modules, Canadian Solar recommends
the use of a copper wire of at least 6 mm2 (10AWG)
section.
 Only copper conductor material should be used. Select
a suitable conductor gauge to minimize voltage drop
and ensure that the conductor ampacity complies with
local regulations (i.e. NEC 690.8(D)).
CABLE AND CONNECTOR PROTECTION
 Secure the cables to the mounting system using UV-
resistant cable ties. Protect exposed cables from
damage by taking appropriate precautions (e.g. placing
them inside a metallic raceway like EMT conduit). Avoid
exposure to direct sunlight.
 A minimum bending radius of 60 mm (2.36 in) is
required when securing the junction box cables to the
racking system.
 Protect exposed connectors from weathering damage
by taking appropriate precautions. Avoid exposure to
direct sunlight.
 Do not place connectors in locations where water could
easily accumulate.
5.2 GROUNDING
 For grounding requirements in North America, a
module with exposed conductive parts is considered to
comply with UL 61730 only when it is electrically
grounded in accordance with both the instructions
presented below and the requirements of the National
Electrical Code. Any grounding means used with
Canadian Solar modules should be NRTL certified to UL
467 and UL 2703 standards. Please consult our technical
service team for the formal approval process.
 For grounding requirements in other areas, although
the modules are certified to Safety Class II, we
recommend them to be grounded and that module
installation should comply with all applicable local
electrical codes and regulations. Minimum size of
equipment grounding conductors for ground raceway
and equipment from NEC 690.8(D) should be
considered. Grounding connections should be installed
by a qualified electrician. Connect module frames
together using adequate grounding cables: we
recommend using 4-14 mm² (AWG 6-12) copper wire.
Holes provided for this purpose are identified with a
grounding symbol (IEC 61730-1). All conductive
connection junctions must be firmly fixed.
 Do not drill any extra ground holes for convenience as
this will void the modules warranty.
 All bolts, nuts, flat washers, lock washers and other
relevant hardware should be made of stainless steel,
unless otherwise specified.

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 Canadian Solar does not provide grounding hardware.
 The grounding method described below is
recommended for Canadian Solar.
GROUNDING METHOD: BOLT + TOOTHED NUT + CUP WASHER.
 A grounding kit containing an M5 (3/16") SS cap bolt, an
M5 (3/16") SS flat washer, an M5 (3/16") SS cup washer,
and an M5 (3/16") SS nut (with teeth) is used to attach
copper grounding wire to a pre-drilled grounding hole
on the frame (see image above). The grounding holes
are located at the upper and lower edges of the long
side frame, close to the module short sides.
 Mounting rail designs should be such to allow easy
access to the grounding holes located on the long side
of the frame, in order to enable the equipment
grounding function when required.
 Place the wire between the flat washer and the cup
washer. Ensure that the cup washer is positioned
between the frame and the wire with the concave side
up to prevent galvanic corrosion. Tighten the bolt
securely using the SS toothed nut. A wrench may be
used to do this. The tightening torque is 3-7 Nm (2.2-5.2
ft-lbs).
6.0 MOUNTING INSTRUCTIONS
The applicable regulations pertaining to work
safety, accident prevention and securing the
construction site must be observed. Workers
and third party personnel shall wear or install fall arrest
equipment. Any third party need to be protected against
injuries and damages.
 The mounting design must be certified by a registered
professional engineer. The mounting design and
procedures must comply with all applicable local codes
and requirements from all relevant authorities.
 The system designer and installer are responsible for
load calculations and for proper design of support
structure.
 The loads described in this manual correspond to test
loads. For installations complying with UL 61730 and IEC
61215-2:2016, a safety factor of 1.5 should be applied
for calculating the equivalent maximum authorized
design loads. Project design loads depend on
construction, applicable standards, location and local
climate. Determination of the design loads is the
responsibility of the racking suppliers and/or
professional engineers. For detailed information,
please follow local structural code or contact your
professional structural engineer.
 Use appropriate corrosion-proof fastening materials.
All mounting hardware (bolts, spring washers, flat
washers, nuts) should be hot dip galvanized or stainless
steel.
 Use a torque wrench for installation.
 Do not drill additional holes or modify the module
frame. Doing so will void the warranty.
WHEN CLAMPS ARE USED AS FIXING MATERIAL
 Install and tighten the module clamps to the mounting
rails using the torque stated by the mounting hardware
manufacturer. System designer and installer are
responsible for load calculations and for proper design
of support structure. It is recommended to use a torque
wrench for installation. Tightening torques must
respectively be within 16~20 Nm (11.8~14.75 ft-lbs) for
To fix the wire between the
flat washer and cup washer,
place the cup washer
(concave side up) between
the frame and the wire.
Then tighten the bolt
using the toothed nut.

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M8 x 1.25-Grade 8.8 (5/16”-18 Grade B7) galvanized or
A2-70 stainless steel coarse thread bolts, depending on
bolt class. The yield strength of bolt and nut should not
be less than 450 MPa.
 Clamp material should be anodized aluminum alloy or
stainless steel of appropriate grades.
 Clamp positions are of crucial importance for the
reliability of the installation, the clamp centerline must
only be positioned within the authorized position
ranges indicated below, depending on the
configuration and load.
6.1 MOUNTING METHODS: BOLTING
 The mechanical load test with these mounting methods
were performed according to IEC 61215.
 Modules should be bolted to supporting structures
through the mounting holes in the rear frame flanges
only.
 Each module must be securely fastened at a minimum
of 4 points on two opposite sides.
 M8 X 1.25 - Grade 8.8 (5/16”-18 Grade B7) galvanized or
A2-70 stainless steel bolt and nut should be used.
 Plain washer size should be M8 with outer diameter 16
mm.
 The yield strength of bolt and nut should not be less
than 450MPa.
Suitable bolt length should be chosen
based on actual module frame height.
For double glass module with 30 mm
frame height, our recommended maximum bolt length
is 20 mm in order to properly insert the bolts through
the mounting hole. The system designer is responsible
to check that the racking supplier specified bolt length
comply with above requirement and will not affect
installation.
 Tightening torques should be within 16~20 Nm
(11.8~14.75 ft-lbs) for M8 (5/16”) coarse thread bolts,
depending on bolt class.
 In areas with heavy wind loads, additional mounting
points should be used. The system designer and the
installer are responsible for correctly calculating the
loads and ensuring that the supporting structure meets
all the applicable requirements.
Mounting method: Bolting
 Modules should be bolted at the following hole
locations depending on the configuration and loads:

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Table 3: Approved bolting methods
Inner four holes installation
method A
Middle four holes installation
method A
Outer four holes installation
method A
Inner four holes installation
method B
Middle four holes installation
method B
Outer four holes installation
method B
Installation
Method
Module
Types
Inner four
holes
installation
method A
Inner four
holes
installation
method B
Middle four
holes
installation
method A
Middle four
holes
installation
method B
Outer four
holes
installation
method A
Outer four
holes
installation
method B
CS3W-MB-AG/
CS3W-PB-AG / / +5400Pa/ -2400Pa
+3600Pa/
-2400Pa / /
CS6R-H-AG/
CS6RA-H-AG
+5400Pa/
-2400Pa
+3600Pa/
-2400Pa / / / /
CS3Y-MB-AG/
CS3Y-PB-AG / / / / +5400Pa/ -2400Pa
+3600Pa/
-2400Pa
CS6W-MB-AG / / / / +5400Pa/
-2400Pa /
CS7N-MB-AG/
CS7L-MB-AG / / / / +5400Pa/ -2400Pa
+3600Pa/
-2400Pa
CS6R-MB-AG +5400Pa/
-2400Pa
+3600Pa/
-2400Pa / / / /
Note: The installation method of bolt is based on the experimental results, “/” means not tested.

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6.2 MOUNTING METHODS: CLAMPING
 The mechanical load test with these mounting methods
were performed according to IEC 61215.
 Each module must be securely fastened at a minimum
of four points on two opposite sides. The clamps should
be positioned symmetrically. The clamps should be
positioned according to the authorized position ranges
defined in table below. Install and tighten the module
clamps to the mounting rails using the torque stated by
the mounting hardware manufacturer. M8 X 1.25 -
Grade 8.8 (5/16”-18 Grade B7) galvanized or A2-70
stainless steel bolt and nut should be used. The yield
strength of bolt and nut should not be less than 450
MPa.
 Tightening torques should be within 16~20 Nm
(11.8~14.75 ft-lbs) for M8 (5/16”-18 Grade B7) coarse
thread bolts, depending on the bolt class. For the bolt
grade, the technical guideline from the fastener
suppliers should be followed. Different
recommendations from specific clamping hardware
suppliers should prevail.
 The system designer and installer are responsible for
load calculations and for proper design of support
structure.
 The mounting rails shall be designed to limit as much
as possible shade on module rear side cells.
 Canadian Solar’s warranty may be void in the cases
where improper clamps or unsuitable installation
methods are found. When installing inter-modules or
end-type clamps, please take the following measures
into account:
1. Do not bend the module frame.
2. Do not touch or cast shadows on the front glass.
3. Do not damage the surface of the frame (to the
exception of the clamps with bonding pins).
4. Ensure the clamps overlap the module frame by at
least 10 mm (0.4 in) for CS6W, CS7N and CS7L, and
5mm (0.2in) for other module series.
5. Overlap in length by at least
a) 80 mm (3.15 in) when 2400 Pa < uplift load ≤ 4000
Pa is required.
b) 40 mm (1.57 in) when uplift load ≤ 2400 Pa is
required.
6. Ensure the clamp thickness is at least 3 mm (0.12 in).
 Clamp material should be anodized aluminum alloy or
stainless steel.
 Clamp positions are of crucial importance for the
reliability of the installation. The clamp centerlines must
only be positioned within the ranges indicated in table
below, depending on the configuration and load.
 For configurations where the mounting rails run
parallel to the frame, precautions should be taken to
ensure the bottom flange of the module frame overlaps
the rail by at least 15 mm (0.59 in) for CS6W, CS7N and
CS7L modules, and 10 mm (0.4 in) for other module
series.

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6.2.1 Clamp mounting on long side of frame and rails perpendicularly to the long side frame
Module Types
Max Mechanical Load (Pa)
+3600/-2400 +5400/-2400 +5400/-3600
A Range (mm)
CS3W-MB-AG/CS3W-PB-AG / / 410-490
CS3Y-MB-AG/CS3Y-PB-AG 300-600 / 400-550
CS6R-H-AG 400-550 / 450-500
CS6RA-H-AG 300-450 / 350-400
CS6W-MB-AG 300-600 400-500 /
CS7N-MB-AG/CS7L-MB-AG / 400-500 /
CS6R-MB-AG 300-600 / 400-500
6.2.2 Clamp mounting on short side of frame and rails perpendicular to the long side frame.
Module Types
A Range (mm)
20-200 200-250
Max Mechanical Load (Pa)
CS3W-MB-AG/CS3W-PB-AG +800/-800 +1000/-1000
CS6R-H-AG/CS6RA-H-AG +2200/-2200 +2400/-2400
CS6R-MB-AG +2200/-2200 +2400/-2400

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6.2.3 Clamp mounting on long side of frame and rails parallel to the long side frame.
Module Types
Max Mechanical Load (Pa)
+3600/-2400 +4000/-3200 +4400/-3200 +4400/-3600
A1 Range (mm)
CS3W-MB-AG/
CS3W-PB-AG
/ / / 410-490
CS3Y-MB-AG/
CS3Y-PB-AG
/ / 400-550 /
CS6W-MB-AG / 400-500 / /
CS6RA-H-AG 300-400 / / /
CS7N-MB-AG/
CS7L-MB-AG/
CS6R-H-AG
400-500 / / /
CS6R-MB-AG 400-500 / / /
6.2.4 Four clamps on short side of frame and rails parallel to the long side frame.
Module Types
A2 Range (mm)
0-200
Max Mechanical Load (Pa)
CS6R-H-AG/CS6RA-H-AG +2400/-2400
CS6R-MB-AG +2400/-2400

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6.2.5 Six clamps on long side of frame and rails perpendicularly to the long side frame
Module Types
Max Mechanical Load (Pa)
+6000/-3600
A3 & A5 Range (mm)
CS6RA-H-AG 60-300
CS6R-H-AG 80-380
CS6R-MB-AG 80-380

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6.3 INSERTION SYSTEMS
 This mounting method has been certified by VDE and
CSA, or qualified by Canadian Solar.
 Insertion methods can vary and depend on the
mounting structures. The installer needs to follow the
mounting guidelines recommended by the mounting
system supplier. Each module must be securely
maintained through all its length on two opposite sides.
Install and tighten the insertion profiles to the support
structure using the hardware and instructions provided
by the mounting system manufacturer. The system
designer and installer are solely responsible for load
calculations and for the proper design of support
structure.
 Canadian Solar warranty may be void in cases where
improper insertion systems or unsuitable installation
methods are found. When installing insertion profiles,
please take the following measures into account:
1. Do not bend the module frame.
2. Do not touch the front glass or cast shadow onto it.
3. Do not damage the surface of the frame.
4. Ensure that the insertion profiles overlap the module
frame by at least 10 mm (0.39 in).
5. Ensure that the module frame (C-shape) overlaps
the insertion profiles by at least 15 mm (0.59 in).
6. Ensure insertion profile thickness and tolerances suit
module thickness.
Insertion Method A
Two insertion profiles run parallel to long side frame.
Insertion Method B
Two insertion profiles run perpendicularly to long side
frame.
Installation Method
Module Types Insertion Method A Insertion Method B
CS6R-H-AG/CS6RA-H-AG +3600Pa/-2400Pa +2400Pa/-2400Pa