PHOTOWATT PW72HT-C User manual

INSTALLATION MANUALS
STANDARD MODULES
BI-GLASS MODULES
BIFACIAL MODULES
For professional use only

INSTALLATION MANUAL
FOR STANDARD MODULES
For professional use only

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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 7
5.2 GROUNDING 9
6.0 MOUNTING INSTRUCTIONS 10
6.1 MOUNTING METHOD : BOLTING 11
7.0 MAINTENANCE 13
ANNEX A: ALTERNATIVE MOUNTING METHODS 16
MOUNTING METHOD A : CLAMPING 16
MOUNTING METHOD B : INSERTION SYSTEMS 24
MOUNTING METHOD C : CENTER MOUNTING
METHOD WITH THIRD PARTY TRACKER 27
ANNEX B: ALTERNATIVE GROUNDING METHODS 29
ANNEX C: MODULE CLEANING GUIDELINES 30
INDEX

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1.0
GENERAL INFORMATION
This general manual provides important safety in-
formation relating to the installation, maintenance
and handling of CS-series 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 requires professional
skills and should only be performed by qualiied
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 solar modules. This
manual is only valid for the standard module type
PW72HTC, PW60HTCP, PW72LHTC, PW60LHTC.
Please retain this manual for future reference.
We recommend checking www.photowatt.com.
regularly for the most updated version.
1.1
INSTALLATION MANUAL DISCLAIMER
The information contained in this manual is subject
to change by EDF ENR PWT without prior notice.
EDF ENR PWT gives no warranty of any kind what-
soever, either explicitly or implicitly, with respect
to the information contained herein.
In the event of any inconsistency among dierent
language versions of this document, the English
version shall prevail. Please refer to our product
lists and documents published on our website at
www.photowatt.com as these lists are updated on
a regular basis.
1.2
LIMITATION OF LIABILITY
EDF ENR PWT shall not be held responsible for da-
mages of any kind, including – without limitation
– bodily harm, injury or damage to property, in
connection with handling PV modules, system ins-
tallation, 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 ins-
tructions 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, ir-
respective of whether or not the module and the
other electrical equipment have been connected.
GENERAL SAFETY
All modules must be installed by licensed electri-
cians 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, clo-
thes, 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, mor-
ning dew, take appropriate measures to
prevent water ingress into the connector
Do not allow children or unauthorized per-
sons near the installation site or storage
area of modules
• Do not install modules in strong wind.
• Use electrically insulated tools to reduce the
risk of electric shock.
• If the disconnects and Over Current Protection
Device (OCPD)'s 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 use or install damaged modules.
• Contact with module surfaces or frames may
cause electric shock if the front glass is broken
or the backsheet is torn
• The PV module does not contain any servi-
ceable parts. Do not attempt to repair any part
of the module.
• Keep the junction box cover closed at all times.
• Do not disassemble a module or remove any
module part.
• Do not artiicially concentrate sunlight on a mo-
dule.
• Do not connect or disconnect modules when
current from the modules or an external source
is present.

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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 EDF ENR PWT
crystalline silicon PV modules can be found on www.
photowatt.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 under its Standard
Test Condition's 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. Depending on your local regulations,
an additional 1.25 multiplier for the short-circuit
current (giving a total multiplier of 1.56) may be
applicable when sizing conductors and fuses.
TABLE 1. LOW TEMPERATURE CORRECTION FACTORS FOR OPENCIRCUIT VOLTAGE
Lowest Expected Ambient Temperature (°C/°F) Corrector 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 to -5 / 31 to 23
1.10
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

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Alternatively, a more accurate correction factor for
the open-circuit voltage can be calculated using
the following formula :
Cvoc = 1-αVoc x (25 - T)
T is the lowest expected ambient temperature at
the system installation site.
αVoc (%/ºC) is the voltage temperature coeicient
of the selected module (refer to corresponding
datasheet).
Electrical calculations and design must be
performed by competent engineer or consultant.
4.0
UNPACKING AND STORAGE
PRECAUTIONS
• Modules should be stored in a dry and venti-
lated environment to avoid direct sunlight and
moisture. If modules are stored in an uncon-
trolled 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.
• 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 ins-
talled by two people. Always use both hands
when handling modules.
• Do not stand, step, walk and / or jump on mo-
dules under any circumstances. Localized heavy
loads may cause severe micro-cracks at cell le-
vel, which in turn may compromise module re-
liability and void EDF ENR PWT’s warranty.
• Do not support the module by the backsheet
when handling or installing the module.
• Do not carry modules on your head.
• Do not drop or place objects (such as tools) on
the modules.
• Do not lift modules by their wires or junction
box, lift them by the frame.
• Stacks of modules should contain no more than
12 modules, and the frames should be aligned.
• Do not place excessive loads on the module or
twist the module frame.
• Do not use sharp instruments on the modules.
Particular care should be taken to avoid module
backsheets being damaged by sharp objects,
as scratches may directly aect product safety.
• Do not leave modules unsupported or unse-
cured.
• Do not change the wiring of bypass diodes.
• Keep all connectors clean and dry at all times.
• Do not expose the modules and its connectors
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 identiier. Each
module has a unique serial number containing
13 (pre March 2013) or 14 (post March 2013)
digits.
• A nameplate is also aixed to the rear of each
module. This nameplate speciies the model
type, as well as the main electrical and safety
characteristics of the module.

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5.0
MODULE INSTALLATION
PRECAUTIONARY MEASURES
AND GENERAL SAFETY
• Prior to installing modules please obtain infor-
mation about any requirements and necessary
approvals for the site, installation and inspec-
tion from the relevant authorities.
• Check applicable building codes to ensure that
the construction or structure (roof, facade, sup-
port, etc.) can bear the module system load.
• PW-series solar modules have been qualiied for
Application Class A (equivalent to Safety Class
II requirements). Modules rated under this class
should be used in systems operating at voltage
above 50 V or power above 240 W, where gene-
ral contact access is anticipated.
• EDF ENR PWT modules have been certiied as
Type 1 or Type 4 according to UL 1703 and Class
C according to IEC 617302, please refer to the
datasheet or the product nameplate for the de-
tailed types.
• Consult your local authority for guidelines and
requirements for building or structural ire
safety.
UL 1703 SYSTEM FIRE RATING REQUIREMENTS
• A photovoltaic systems composed of UL 1703
certiied modules mounted on a UL 2703 cer-
tiied mounting system should be evaluated in
combination with roof coverings in accordance
with UL 1703 standard, with respect to meeting
the same ire classiication as the roof assembly.
• Mounting systems with a System Fire Class Ra-
ting (Class A, B or C), tested in conjunction with
ire rated “Type 1” or “Type 4” rated modules,
are considered acceptable for use with Cana-
dian Solar Inc. 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 speciic
System Fire Class Rating should be clearly spe-
ciied in the installation instructions and UL 2703
certiication of the mounting system supplier.
• When installing modules, ensure the suppor-
ting roof has a ire resistant roof covering rated
for the application.
• The ire rating for this module is only valid
when the product is installed as speciied in the
mechanical mounting instructions.
ENVIRONNEMENTAL CONDITIONS
• The module is intended for use in general
open-air climates, as deined in IEC 607212-
1: Classiication of environmental conditions
Part-21: Environmental conditions appearing in
nature - Temperature and humidity.
• Please consult the EDF ENR PWT technical
support department for more information on
the use of modules in special climates, , such
as an altitude greater than 2000 m.
Do not install modules near open lames or
lammable 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.
• Failure to comply with these instructions will
void EDF ENR PWT limited warranty.
INSTALLATION REQUIREMENTS
• Ensure that the module meets the general
technical system requirements.
• Ensure that other system 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's
junction box may vary depending on the model
series.
• Only connect the quantity of modules that
corres- ponds to the voltage speciications of
the inverters used in the system. In addition
modules should 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 coeicients that apply to opencircuit
voltage).

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• A maximum of two strings can be connected
in parallel without the need to incorporate an
over- current protection device (fuses, etc.) in
series within each string. Three or more strings
can be connected in parallel if an appropriate,
certiied over-current protection device is ins-
talled 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
circumstance.
• For high power density modules such as CS1
series intended to be used on rooftop appli-
cations, in agreement with IEC 62548: 2016
Photovoltaic (PV) arrays design requirements,
blocking diodes should be used in each PV array
module string as exclusive mean of protection
against reverse currents where three or more
strings are connected in parallel. Where per-
mitted by your local electrical code, blocking
diodes can also be used for overcurrent protec-
tion, in place of fuses or other OCPD devices.
• Only modules with similar electrical outputs
should be connected in the same string to
avoid or minimize mismatch eects 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 C.
• Modules should be safely ixed to bear all ex-
pected loads, including wind and snow loads.
• A minimum clearance of 6.5 mm (0.25 in)
between modules is required to allow for ther-
mal expansion of the frames.
• The small drainage holes on the underside of
the module must not be blocked.
OPTIMUM ORIENTATION AND TILT
To maximize your annual yield, ind out the optimum
orientation and tilt for PV modules in your region.
The highest yields are achieved when sunlight
shines perpendicularly onto the PV modules.
AVOID SHADING
• Even minor partial shading (e.g. from dirt depo-
sits) reduces yields. A module can be conside-
red to be unshaded if its entire surface is free
from shading all year round. Sunlight should be
able to reach the module even on the shortest
day of the year.
• Constant shading conditions can aect module
service lifetime, due to accelerated ageing of
the encapsulation material and thermal stress
on the bypass diodes.
RELIABLE VENTILATION
• Suicient clearance (at least 10 cm (3.94 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 enables condensation or moisture to
dissipate.
• According to UL 1703, any other speciic
clearance required for maintaining a system
ire rating should prevail. Detailed clearance
requirements pertaining to system ire ratings
must be provided by your racking supplier.
5.1
MODULE WIRING
CORRECT WIRING SHEME
• Cable management scheme should be re-
viewed and approved by the EPC contractor,
in particular required cable lengths should be
cross-checked considering the speciicities of
the tracker structure like bearing house gaps.
If longer cable or additional jumper cable is re-
quested, please contact EDF ENR PWT’s sales
representative in advance.
• Ensure that the wiring is correct before starting
up the system. If the measured open circuit vol-
tage (Voc) and short-circuit current (Isc) dier
substantially from the speciications, this indi-
cates 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 pe-
netration inside the connectors.
• For PW72HT, PW60HT, PW72LHT and PW60LHT
series modules, EDF ENR PWT oers optional
cable speciications to match various system
conigurations. Recommended system cable
schemes are shown in Table 2 below :

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Modules types Standard cables Optional cables
PW72HTC, PW60HTCP,
PW72LHT, PW60LHTC
TABLE 2 : SYSTEME CABLE SCHEME FOR PW72HT, PW60HT, PW72LHT AND PW60LHT
CORRECTCONNECTIONOFPLUSCONNECTORS
• Make sure that all connections are safe and
properly mated. The PV connector should
not be subjected 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 o.
• Connectors are not waterproof when unmated.
When installing modules, connector should be
connected to each other as soon as possible
or appropriate measures should be taken to
avoid moisture and dust penetrating into the
connector.
• Do not clean or precondition the connectors
using lubricants or any unauthorized chemical
substance.
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
be sunlight-resistant itself) that meet local ire,
building and electrical regulations. Please en-
sure that all wiring is in perfect electrical and
mechanical condition.
• Installers may only use single-conductor cable
listed and labeled as USE2 or PV wire which is
90°C wet rated in North America, and single
conductor cable, 2.516 mm² (514 AWG ), 90°C
wet rated in other areas (i.e. TUV 2PfG1169 or
EN50618 approved), with proper insulation
which is able to withstand the maximum pos-
sible system opencircuit voltage.
• 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 regu-
lations (i.e. NEC 690.8(D)).

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CABLE AND CONNECTOR PROTECTION
• Secure the cables to the mounting system
using UV-resistant cable ties. Protect exposed
cables from damage by taking appropriate pre-
cautions (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.
• Do not place connectors in locations where wa-
ter could easily accumulate.
5.2
GROUNDING
• For grounding requirements in North America, a
module with exposed conductive parts is consi-
dered to comply with UL 1703 only when it is
electrically grounded in accordance with both
the instructions presented below and the re-
quirements of the National Electrical Code. Any
grounding means used with EDF ENR PWT mo-
dules should be NRTL certii ed 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 certii ed to Safety
Class II, we recommend them to be grounded
and that module installation should comply
with all applicable local electrical codes and
regulations.
• Grounding connections should be installed by
a qualii ed 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 identii ed with
a grounding symbol (IEC 617301). All
conductive connection junctions must be
irmly ixed.
• Do not drill any extra ground holes for conve-
nience this will void the modules warranty.
• All bolts, nuts, l at washers, lock washers and
other relevant hardware should be made of
stainless steel, unless otherwise specii ed.
• EDF ENR PWT does not provide grounding hard-
ware.
• One grounding method is recommended for
EDF ENR PWT standard modules, as descri-
bed below. For alternative grounding methods,
please refer to Annex B (Alternative Grounding
Methods) of this installation manual. It may not
be possible to use standard grounding me-
thods for certain module ranges. Please refer to
Annex B for more details.

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GROUNDING METHOD :
BOLT + TOOTHED NUT + CUP WASHER
• A grounding kit containing an M5 (3/16") SS cap
bolt, an M5 (3/16") SS lat 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 below).
• Place the wire between the lat washer and the
cup washer. Ensure that the cup washer is po-
sitioned between the frame and the wire with
the concave side up to prevent galvanic cor-
rosion. 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 per-
sonnel shall wear or install fall arrest equipment.
Any third party need to be protected against inju-
ries and damages.
• The mounting design must be certiied by a re-
gistered professional engineer. The mounting
design and procedures must comply with all
applicable local codes and requirements from
all relevant authorities.
• The module is considered to be in compliance
with UL 1703 and IEC 61215 only when the mo-
dule is mounted in the manner speciied by the
mounting instructions included in this installa-
tion manual.
• Any module without a frame (laminate) shall not
be considered to comply with the requirements
of UL 1703 unless the module is mounted with
hardware that has been tested and evaluated
with the module under this standard or by a ield
inspection certifying that the installed module
complies with the requirements of UL 1703.
• EDF ENR PWT does not provide mounting hard-
ware.
• Standard modules can be mounted onto a sup-
port structure using one of several approved
methods. One of such methods is described be-
low. For details of other mounting methods and
the methods recommended by Canadian Solar
Inc. for special module ranges, please refer to
the Annex A (Alternative Mounting Methods) of
this installation manual. For information about
other installation methods, please contact your
local representative. Failure to use a recognized
installation method will void the EDF ENR PWT
warranty.
• Use appropriate corrosion-proof fastening
materials. All mounting hardware (bolts, spring
washers, lat 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.
• Standard modules can be installed in either
landscape or portrait orientations. Refer to
the detailed instructions for further guidance.
Please note that in areas with heavy snowfall (>
2400 Pa) further countermeasures such the use
of additional support bars should be conside-
red to avoid snow loads damaging the lowest
row of modules.
• In cases where an additional support bar is re-
commended to improve both mechanical sta-
bility and long-term module performance, we
recommend selecting a suiciently resistant
material. EDF ENR PWT recommends bars with
a minimum thickness of 50 mm (1.97 in). The
support bar centerline should be positioned
within 100 mm (3.94 in) of the side frame cen-
terline (slight shifts may be necessary to access
module grounding holes).
• The loads described in this manual correspond
to test loads. For installations complying with
IEC 612152: 2016 and UL 1703, a safety fac-
tor 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 cli-
mate. Determination of the design loads is
1. To ix the wire between
the lat washer and cup wa-
sher, place the cup washer
(concave side up) between
the frame and the wire.
2. Then tighten the bolt
using the toothed nut

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6.1
MOUNTING METHOD : BOLTING
• This mounting method has been qualiied by
EDF ENR PWT as well as certiied by VDE. and
CSA.
• Modules should be bolted to supporting
structures through the mounting holes in the
rear frame langes 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. The yield strength of bolt and
nut should not be less than 450 MPa.
• Tightening torques should be 17~23 Nm
(12.5~17.0 ft-lbs) respectively for M8 (5/16”-18)
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.
• Modules should be bolted at the following hole
locations depending on the coniguration and
loads:
the responsibility of the racking suppliers and
/ or professional engineers. For detailed infor-
mation, please follow local structural code or
contact your professional structural engineer.

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TABLE 3 : APPROVED BOLTING METHODS
Bolting on the long frame side using four middle
mounting holes. Mounting rails run perpendicu-
larly to the long frame side.
Bolting on the long frame side using four midle
mounting holes. Mounting rails run parallel to
the long frame side.
Maximum Load:
Uplift load ≤ 2400 Pa
Downforce load ≤ 5400 Pa
Compatible module types : PW60HTCP
Maximum Load:
Uplift load ≤ 2400 Pa
Downforce load ≤4000 Pa
Compatible module types : PW60HTCP
Bolting on the long frame side using four inner-
most mounting holes. Mounting rails run perpen-
dicularly to the long frame side.
Bolting on the long frame side using four inner
most mounting holes. Mounting rails run pa-
rallel to the long frame side.
Maximum Load:
Uplift load ≤ 2400 Pa
Downforce load ≤ 5400 Pa
Compatible module types : PW72HTC,
PW72LHTC
Maximum Load:
Uplift load ≤ 2400 Pa
Downforce load ≤ 5400 Pa
Compatible module types : PW72HTC,

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Bolting on the long frame side using four inner-
most mounting holes. Mounting rails run perpen-
dicularly to the long frame side.
Maximum Load:
Uplift load ≤ 2400 Pa
Downforce load ≤ 5400 Pa
Compatible module types : PW60LHTC,
7.0
MAINTENANCE
• Do not make modiications to any components
of the PV module (diode, junction box, plug
connectors or others).
• Regular maintenance is required to keep mo-
dules clear of snow, bird droppings, seeds,
pollen, leaves, branches, dirt spots, and dust.
• Modules with suicient tilt (at least 15°), gene-
rally may not require cleaning (rain will have a
selfcleaning eect). If the module has beco-
me soiled, wash with water and a non-abrasive
cleaning implement (sponge) during the cool
part of the day. Do not scrape or rub dry dirt
away, as this may cause micro scratches.
• Snow should be removed using a soft brush.
• Periodically inspect the system to check the in-
tegrity of all wiring and supports.
• To protect against electric shock or injury, elec-
trical or mechanical inspections and mainte-
nance should be performed by qualiied per-
sonnel only.
• Please refer to Annex C (Module Cleaning
Guide) for additional information on this topic.

D69-P06-01 GB R6 01/07/2020 www.photowatt.com
ANNEX OF INSTALLATION MANUAL
FOR STANDARD MODULES
For professional use only

D69-P06-01 GB R6 01/07/2020 www.photowatt.com
ANNEX A : ALTERNATIVE MOUNTING METHODS 16
MOUNTING METHOD A : CLAMPING 16
MOUNTING METHOD B : INSERTION SYSTEMS 21
MOUNTING METHOD C :
MOUNTING METHODS WITH SINGLE AXIS TRACKER 23
ANNEX B : ALTERNATIVE GROUNDING METHODS 24
ANNEX C : MODULE CLEANING GUIDELINE 25
ANNEX
INSTALLATION MANUAL WARNING
The information contained in this manual is subject to change without notice by
EDF ENR PWT. EDF ENR PWT makes no warranty, express or implied, with respect to
the information contained in this document.
In the event of any inconsistency between the dierent language versions of this
document, the English version will prevail.
Please refer to the product lists and documents published on our website at:
www.photowatt.com as these lists are updated regularly.

D69-P06-01 GB R6 01/07/2020 www.photowatt.com
16
All the basic requirements of the main installation
manual should apply to the alternative mounting
methods, unless otherwise speciied.
The loads described in this manual corresponds
to test loads. For installations complying with IEC
612152: 2016 and UL 1703, a safety factor of 1.5
should be applied for calculating the equivalent
maximum authorized design loads.
Project design loads depend on construction, ap-
plicable standards, location and local climate. De-
termination of the design loads is the responsibility
of the racking suppliers or professional engineers.
For detailed information, please follow local struc-
tural code or contact your professional structural
engineer.
MOUNTING METHOD A : CLAMPING
• The mounting method has been qualiied by
EDF ENR PWT as well as certiied by VDE and
CSA.
• Top or bottom clamping methods will vary and
are dependent on the mounting structures.
Please follow the mounting guidelines recom-
mended by the mounting system supplier.
• Each module must be securely fastened at a mi-
nimum of four points on two opposite sides. The
clamps should be positioned symmetrically. The
clamps should be positioned according to the
authorized position ranges deined in table A.
• Install and tighten the module clamps to the
mounting rails using the torque stated by the
mounting hardware manufacturer. M8 X 1.25
(5/16”) bolt and nut are used for this clamping
method.
• Tightening torques should be within 17~23 Nm
(12.5~17.0 ft-lbs) for M8 (5/16”) coarse thread
bolts, depending on the bolt class. For the bolt
grade, the technical guideline from the fastener
suppliers should be followed. Dierent recom-
mendations from speciic clamping hardware
suppliers should prevail.
• The system designer and installer are res-
ponsible for load calculations and for proper de-
sign of support structure.
• EDF ENR PWT's warranty may be void in cases
where improper clamps or unsuitable instal-
lation methods are found. When installing in-
ter-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 5 mm (0.2 in).
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’s thickness is at least 3 mm
(0.12 in).
ANNEX A :
ALTERNATIVE MOUNTING METHODS
• 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 A, depending on the
coniguration and load.
• For conigurations where the mounting rails
run parallel to the frame, precautions should be
taken to ensure the bottom lange of the mo-
dule frame overlaps the rail by 15 mm (0.59 in)
or more.
Min. 3 mm thickness
Min. 5 mm overlap
Min. overlap
length 40 mm
Clamp
Module
frame
rail
Min. 15 mm overlap
width

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17
Use four clamps on the long side. Mounting rails
run perpendicularly to the long side frame.
A1 range = (340 – 550) mm
Maximum Load:
Uplift load ≤ 2400 Pa
Downforce load ≤ 2400 Pa
A1 range = (410 – 490) mm
Maximum Load:
Uplift load ≤ 3600 Pa
Downforce load ≤ 5400 Pa
TABLE A. PW72HTC
Use four clamps on the long side. Mounting rails
run parallel to the long side frame.
A1 range = (410 – 490) mm
Maximum Load:
Uplift load ≤ 2400 Pa
Downforce load ≤ 5400 Pa
Use two clamps on the long side and two clamps
on the short side. Mounting rails run perpendi-
cular to the long side frame
A1 range = (300 – 550) mm
A2 range = (200 – 250) mm
Maximum Load:
Uplift load ≤ 2400 Pa
Downforce load ≤ 2400 Pa
Use four clamps on the short side and two
clamps on the long side. An additional support
bar should be placed below the center of the
module
A2 range = (200 – 250) mm
Maximum Load:
Uplift load ≤ 2400 Pa
Downforce load ≤ 5400 Pa

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18
Use four clamps on the long side. Mounting rails
run perpendicularly to the long side frame.
A1 range = (240 – 330) mm
Maximum Load:
Uplift load ≤ 3600 Pa
Downforce load ≤ 5400 Pa
A1 range = (331 – 550) mm
Maximum Load:
Uplift load ≤ 2400 Pa
Downforce load ≤ 2400 Pa
PW60HTCP
Use four clamps on the short side and two
clamps on the long side. An additional support
bar should be placed below the center of the
module.
A2 range = (200 – 250) mm
Maximum Load:
Uplift load ≤ 2400 Pa
Downforce load ≤ 5400 Pa
Use four clamps on the long side. Mounting rails
run parallel to the long side frame.
A1 range = (240 – 330) mm
Maximum Load:
Uplift load ≤ 2400 Pa
Downforce load ≤ 4000 Pa
Use six clamps on the long side. Mounting rails
run perpendicularly to the long side frame.
A3 range = (80 –380) mm,
A5 range = (80 –380) mm
Maximum Load:
Uplift load ≤ 4000 Pa
Downforce load ≤ 5400 Pa

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19
Use two clamps on the long side and two clamps
on the short side. Mounting rails run perpendi-
cular to the long side frame.
A1 range = (100 – 550) mm
A2 range = (200 – 250) mm
Maximum Load:
Uplift load ≤ 2400 Pa
Downforce load ≤ 2400 Pa
PW72LHTC
Use four clamps on the long side. Mounting rails
run perpendicularly to the long side frame.
A1 range = (340 – 550) mm
Maximum Load:
Uplift load ≤ 2400 Pa
Downforce load ≤ 2400 Pa
A1 range = (410 – 490) mm
Maximum Load:
Uplift load ≤ 3600 Pa
Downforce load ≤ 5400 Pa