Qcells Q.PEAK DUO XL-G11S.X / BFG Series User manual

Installation and
operation manual
Q.PEAK DUO XL-G11S.X / BFG solar module series

INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11S.X / BFG2
Table of contents
DOCUMENT REVISION 04
This installation manual is valid for North America as of March 1st 2023 for Q.PEAK DUO XL-G11S.3 / BFG, Q.PEAK DUO XL-G11S.7 / BFG solar modules, and replaces all earlier versions.
DISCLAIMER
This manual is subject to change. The data sheets and customer information valid at the point in time when the relevant module was manufactured apply to the installation, mounting,
and maintenance procedures for the respective solar modules, as far as no updated document is provided.
1 Introduction 3
2 Planning 5
2.1 Technical specifications 5
2.2 Requirements 6
2.3 Mounting options 8
2.4 Electrical layout 14
3 Installation 15
3.1 Safety and transport 15
3.2 Preparation of installation 17
3.3 Module installation 18
4 Electrical Connection 19
4.1 Safety 19
4.2 Electrical installation safety 20
4.3 Connection of modules 21
4.4 After installation 22
5 Grounding 23
6 Faults and defects 24
7 Disposal 24
8 Maintenance and cleaning 25

INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11S.X / BFG 3
1 Introduction
With solar modules from Hanwha Q CELLS America Inc. (here-
after referred to as "Qcells") you can directly transform the
sun’s limitless energy into environmentally-friendly solar elec-
tricity. In order to ensure the maximum performance of your
Qcells solar modules, please read the following instructions
completely and carefully and observe all guidelines. Non-com-
pliance may result in damage and / or physical injury.
This installation manual provides instructions for the safe installa-
tion and operation of crystalline solar modules.
Please read these instructions carefully before proceeding with
your installation.
Please retain these instructions for the life of the solar mod-
ules.
Please ensure that this Manual is available to the operator at all
times.
This Manual should be given to all subsequent owners or users
of the solar modules.
All supplements received from the manufacturer should be in-
cluded.
Please observe all other applicable documents.
If your questions are not satisfactorily answered in the manual,
please contact your system supplier.
Additional information can be found on our website at www.
qcells.com.
Intended use
This manual is valid in North America for Qcells solar modules.
These instructions contain information regarding the safe han-
dling and use of quality crystalline solar modules from Qcells and
their installation, mounting, wiring, maintenance.
Symbols and Labels
The following symbols and labels are used throughout the Manu-
al for ease of use.
SYMBOL DESCRIPTION
Procedure with one or more steps.
Lists of items.
Ensure that when carrying out a procedure,
you check the results of said procedure.
Prohibited.
Beware of possible danger or damage.
Categories:
■Danger: Risk of fatal injury
■Attention: Risk of serious injury or damage to
property
■Note: Risk of damage to product
Units
Where both Imperial and U.S. units (for example inches) are
shown, metric units are definitive. References to “Data Sheet” or
“Module Data Sheet” refer to the Module Data Sheet applicable
to the module being used.
Safety Regulations
The installer and solar module operator are responsible for com-
pliance with all applicable statutory requirements and regulations.
The following regulations and standards must be upheld at all
times during the installation, operation, and maintenance of the
solar modules:
■Installation and Operation Manual.
■Other applicable documents (such as country-specific reg-
ulations for pressure equipment, operational safety, hazard-
ous goods, and environmental protection).
■Regulations and requirements specific to the system.
■Applicable country-specific laws, regulations, and provisions
governing the planning, installation, and operation of solar
power systems and work on roofs.
■Any valid international, national and regional regulations
governing work with direct current, especially those appli-
cable to the installation of electrical devices and systems,
and regulations issued by the respective energy provider
governing the parallel operation of solar power systems.
■Accident-prevention regulations.
Certified Personnel
Both, the operator and installer are responsible for ensuring that
the installation, maintenance, connection to the grid, and dis-
mantling are carried out by trained and qualified electricians and
engineers with approved training certificates (issued by a state or
federal organization) for the respective specialist trade. Electrical
work may only be performed by an ocially certified tradesper-
son in accordance with the applicable safety standards, accident
prevention regulations, and the regulations of the local energy
provider.

INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11S.X / BFG4
1 Introduction
Validity
These instructions are only valid for crystalline solar modules
from the company Qcells as specified at chapter "2.1 Technical
specifications". Qcells assumes no liability for damage resulting
from failure to observe these instructions.
Please observe the wiring and dimensioning of the system.
The installer of the system is responsible for compliance with
all necessary safety regulations during set-up and installation.
Qcells assumes no liability on the basis of these instructions.
Qcells is only liable in the context of contractual agreements or
in the context of accepted guarantees. Qcells accepts no other
responsibility for the functionality and safety of the modules.
Please observe the instructions for any other system compo-
nents that may be part of the complete solar power system. It
may be necessary to carry out a structural analysis for the en-
tire project.
If your questions are not satisfactorily answered in the manual,
please contact your system supplier.
Additional information can be found on our website at
www.qcells.com.
Information for the Operator
Please keep this manual for the entire life of the solar power
system.
Please contact your system supplier for information concerning
the formal requirements for solar power systems.
Please be sure to contact the relevant local authorities and en-
ergy providers regarding regulations and permit requirements
prior to installation of the solar power system. Your financial
success depends on the fulfillment of these requirements.
Other applicable documents
This installation manual is only valid in combination with the fol-
lowing technical information.
Document type
Product data sheet
Packaging and transport information
MISUSE OR INCORRECT USE OF SOLAR MODULES VOIDS THE
LIMITED WARRANTY AND MAY CREATE A SAFETY HAZARD
AND RISK PROPERTY DAMAGE. THIS INCLUDES IMPROPER IN-
STALLATION OR CONFIGURATION, IMPROPER MAINTENANCE,
UNINTENDED USE, AND UNAUTHORIZED MODIFICATION.
Attention!
This marking indicates that this product should not be disposed
of with other household waste within the EU. Recycle this product
properly to prevent possible damage to the environment or a risk
to human health via uncontrolled waste disposal and in order to
promote the sustainable reuse of material resources. Please re-
turn your used product to an appropriate collection point or con-
tact the retailer where you purchased this product. Your retailer
will accept used products and return them to an environmental-
ly-sound recycling facility.

INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11S.X / BFG 5
2 Planning
2.1 Technical specifications
For additional information see the relevant datasheet of the module provided at www.qcells.com.
PRODUCT LINE Q.PEAK DUO XL-G11S.3/BFG, Q.PEAK DUO XL-G11S.7/BFG
Type Q.ANTUM DUO
Length [in] 96.9 (2462 mm)
Width [in] 44.6 (1134 mm)
Frame height [in] 1.38 (35 mm)
Area [yd²] 3.3 (2.79 m²)
Weight [lbs] 76.9 (34.9 kg)
Max. system voltage VSYS 1500 V (IEC) / 1500 V (UL)
Max. series fuse rating 25 A
Permissible temperature range –40 °F to +185 °F (–40 °C to +85 °C)
Junction box protection class ≥ IP67 with bypass diode
Connector protection class IP67 or IP68
Fire rating based on ANSI /
UL 61730 C / TYPE 29 (New Type is similar to Type 3 but with metallic frame)
Max. test load Push / Pull1[lbs/ft²] 113 /50 (5,400 Pa / 2,400 Pa)
Max. design load
Push / Pull1[lbs/ft²] 75 / 33 (3,600 Pa / 1,600 Pa)
Middle rail No
Certificates Quality Controlled PV by TÜV Rheinland; CE-compliant; IEC 61215:2016;
IEC 61730:2016; PV module classification: Class II;
1Test and design load in accordance with IEC 61215:2016, depending on mounting options (see section "2.3 Mounting options")
44.6 "
(1134 mm)
55.1 " (1400 mm)
96.9 " (2462 mm)
1.38 " (35 mm)
4 × Mounting slots (DETAIL A)
Frame
43.0
"
(1092 mm)
Label
4 × Grounding holes,
Ø 0.18
" (4.5 mm)
15.7 " (400 mm)
8 × Mounting slots system Tracker (DETAIL B)
DETAIL A
0.63 " (16 mm)
0.33
" (8.5 mm)
0.83" (21 mm)
DETAIL B
0.39 " (10 mm)
0.28" (7 mm)
0.87" (22 mm)
42.9 "
(1090 mm)
31.1 " (790 mm)
≥ 13.8 " (350 mm)
≥ 29.5 " (750 mm)
20.9 " (531mm)
8 × Drainage holes
0.12 × 0.24
" (3 × 6 mm)
Tracker slot Mounting
slots
Fig. 1: External dimensions and components for Q.PEAK DUO XL-G11S.3 / BFG, Q.PEAK DUO XL-G11S.7 / BFG.

INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11S.X / BFG6
2 Planning
2.2 Requirements
Installation Site
Please note the following guidelines that apply to the installation
site:
■Solar modules are not explosion-proof and are not suitable for
use in explosive environments.
Do not operate solar modules near highly flammable gas and
vapors (e.g. gas tanks, gas stations).
Do not install modules in enclosed space.
Do not install modules in locations where they may be sub-
merged in water (e.g. floodplains).
Do not use modules as a substitute for the normal roofing (e.g.
modules are not watertight).
Do not install modules in close proximity to air conditioning sys-
tems.
Do not install modules above 13,120 ft (4,000 m) altitude above
sea level.
Contact with saline water (e.g. spray water from the sea) and
salt aggregation on the modules must be avoided.
Do not bring any chemical substance (e.g. oil, solvent etc.) into
contact with any part of the panel. Only substances, which are
released by Qcells, are allowed to be used during installation,
operation and maintenance.
Any installation of modules on surfaces of water is prohibited.
This includes installations on floating as well as pile-based
platforms. Qcells may extend the coverage of its warranty to
such installations, based on a case by case assessment of the
system design and location. A prior written consent by the war-
rantor is required in any case.
Prevention of Shadowing Eects
Optimal solar irradiation leads to maximum energy output:
For this reason, install the modules so that they face the sun.
Avoid shadowing (due to objects such as buildings, chimneys
or trees).
Avoid partial shading (for example through overhead lines, dirt,
snow).
Limitations
The solar modules are designed for the following applications:
■Operating temperatures from –40 °F to +185 °F.
■Pull loads and push loads according to chapter 2.3 (‘Test
Load’ in accordance with IEC 61215 and ‘Design Load ×1.5’ in
accordance with UL 61730).
■Installation using a mounting structure for solar modules.
Mounting Structure Requirements
Requirements for the mounting structure:
■Conform to the necessary structural requirements.
■Compliant with local snow and wind loads.
■Properly fastened to the ground, the roof, or the façade.
■Forces acting on the module are relayed to the mounting
substructure.
■Ensures sucient rear ventilation of the module.
■Avoid the usage of different metals to prevent contact
corrosion.
■Allows for stress-free expansion and contraction due to
temperature fluctuations.
Ensure that no additional forces are applied through the
mounting system into the module except for the wind and snow
loads. Additional forces and moments of torque at the mount-
ing positions caused by torsions, displacements or vibrations in
the mounting system are not allowed.
Ensure that the clamps and the mounting frame are compatible.
For tracker installation TB1a / b, TB2a / b :
Maintain a minimal distance (clearance) of at least
5 mm between frame bottom edge and closest
substructure element (e.g. torque tube).
Test loads and design loads according to chapter
"2.3 Mounting options".
Clearance ≥ 0.2 in (5 mm)
Substructure
Module
Frame height
1.4 in (35 mm)
Clamp System Recommendations
Use customary clamps that satisfy the following requirements:
■Clamp width: ≥ 1.5 in (38 mm).
■Clamp height compliant with a 1.4 in (35 mm) frame height.
■Clamp depth: 0.28-0.47 in (7-12 mm). (applicable for all CL
clamping mounting options at section "2.3 Mounting options")
■Clamps are not in contact with the front glass.
■Clamps do not deform the frame.
■Clamps that satisfy the structural requirements based on the
conditions of the installation site according to the applicable
regulations and technical standards.
■Long-term stable clamps that securely ax the module to the
mounting frame.
Module Orientation Requirements
■Vertical or horizontal installation is permitted.
Ensure that rain and melting snow can run o freely. No water
accumulation.
Ensure that the drainage holes in the frame are not covered.
No sealing.

INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11S.X / BFG 7
75°
3°
Maintain the permissible angle of inclination.
■Minimum angle of inclination: 3°
■Inclination angles above 75° may be limited by
local regulations
Standing water on the modules glass needs to be
avoided.

INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11S.X / BFG8
2 Planning
2.3 Mounting options
REQUIREMENTS OF ALL MOUNTING OPTIONS
The loads in the table are related to the mechanical stability of the solar modules. The mechanical stability of the mounting system
including clamps has to be evaluated by the system supplier. The listed test load values have been determined with the following
clamp parameters: clamp width = 1.57 in (40 mm) and clamp depth = 0.39 in (10 mm).
The system installer is responsible for the determination of location-specific load requirements.
Ensure that the connection cables of the junction box do not run between laminate and mounting rails.
Modules bend under load. Therefore, sharp objects (e.g. screws, ballast stones, rail ends, rails with burrs or sharp corners) must
not be placed near the module backside so as not to touch the laminate under load.
Ensure that the junction boxes do not touch the mounting structure (e.g. shorts rails, ballast, etc.) or the rooftop under load.
Clamps or insertion profiles etc. must not touch the glass (even under load).
Unbalanced loads (e.g. snow overhangs, snowdrifts) which result in locally significantly increased loads must be removed or
avoided by technical measures.
A minimum support depth of 0.59 in (15 mm) is required on the back side of the module.
Loads according to IEC 61215-2:2016 and UL 61730-2:2017 except for design loads lower than 1600 Pa which do
not fulfill the requirements of the standards. The test procedure is always according to IEC 61215-2:2016.
Design loads result from the safety factor 1.5.
Mounting options with clamps
The illustrated installation options apply for both horizontal and vertical module orientation.
Module Clamp Mounting rail
4 CLAMPS ON LONG SIDE &
2 CONTINUOUS RAILS PARALLEL TO SHORT SIDE 4 CLAMPS ON LONG SIDE SHORT RAILS ALLOWED
CL1a
L
CL1b
L
0.59 - 4.33
(15 - 110)
POSITION OF
CLAMPS* in
TEST LOAD
PUSH/PULL Pa
DESIGN LOAD
PUSH/PULL Pa
POSITION OF
CLAMPS* in
TEST LOAD
PUSH/PULL Pa
DESIGN LOAD
PUSH/PULL Pa
L15.8 - 21.7
(400 - 550 mm) 3600 / 2400 2400 / 1600 L7.9 - 21.7 (200 - 550 mm)
2100 / 2400 1400 / 1600
CL1a
These mounting options are not recommended as mounting rails will cast shade on the module rear side.
Ensure that module frame is fixed directly on the rail of the substructure (no spacer allowed between the
module and substructure).
CL1b
Using of short mounting rails are permissible, if they overlap with the module less than 4.33 in (110 mm).
Maintain a minimum distance (clearance) of ≥ 1.38 in (35 mm) between frame bottom edge and roof top or
ballast.
* Distance between outer edge of module and middle of the clamp.

INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11S.X / BFG 9
4 CLAMPS ON LONG SIDE &
2 CONTINUOUS RAILS UNDERNEATH LONG FRAME PARTS 2 CLAMPS ON LONG SIDE, 2 CLAMPS ON SHORT SIDE
CL3
L
CL5
L
S
POSITION OF
CLAMPS* in
TEST LOAD
PUSH/PULL Pa
DESIGN LOAD
PUSH/PULL Pa
POSITION OF
CLAMPS* in
TEST LOAD
PUSH/PULL Pa
DESIGN LOAD
PUSH/PULL Pa
L15.8 - 21.7
(400 - 550 mm) 3600 / 2400 2400 / 1600 S0.79 (20 mm)
2400 / 2400 1600 / 1600
L27.6 (700 mm)
CL3
Ensure that module frame is fixed directly on the rail of the substructure (no spacer allowed between the
module and substructure).
Minimum support depth of 0.59 in (15 mm) is required on the back side of the module.
CL5 Minimum required support depth on the module backside is 0.39 in (10 mm) on long frame side and 0.59 in
(15 mm) on short frame side.
* Distance between outer edge of module and middle of the clamp.

INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11S.X / BFG10
Mounting options with bolts
The illustrated installation options apply for both horizontal and vertical module orientation.
Module Bolt Mounting rail
4 BOLTS/SCREWS ON LONG SIDE &
2 CONTINUOUS RAILS PARALLEL TO SHORT SIDE
4 BOLTS / SCREWS ON LONG SIDE &
2 CONTINUOUS RAILS UNDERNEATH LONG FRAME PARTS
FB1
L
FB2
L
POSITION OF
BOLTS* in
TEST LOAD
PUSH/PULL Pa
DESIGN LOAD
PUSH/PULL Pa
POSITION OF
BOLTS* in
TEST LOAD
PUSH/PULL Pa
DESIGN LOAD
PUSH/PULL Pa
L20.9 (531 mm) 5400 / 2400 3600 / 1600 L20.9 (531 mm) 3600 / 2400 2400 / 1600
FB1 This mounting option is not recommended as mounting rails will cast shade on the module rear side.
FB1, FB2
Ensure that module frame is fixed directly on the rail of the substructure (no spacer allowed between the
module and substructure).
Use M8 corrosion-proof screws and washers (diameter ≥ 0.62 in (15.8 mm)) for mounting slots (Detail A, Fig.1)
and M6 corrosion-proof screws and washers or bobtails for tracker slots (diameter ≥ 0.51 in (13 mm); Detail B,
Fig. 1). Mounting screws and washers should have the same material properties.
4 BOLTS/SCREWS ON LONG SIDE &
2 CONTINUOUS RAILS UNDERNEATH LONG FRAME PARTS
mFB2
L
POSITION OF
BOLTS* in
TEST LOAD
PUSH/PULL Pa
DESIGN LOAD
PUSH/PULL Pa
L20.9 (531 mm) 2700 / 2400 1800 / 1600
mFB2
Mounting rails need to extend beyond the middle of mounting holes by at least 0.79 in (20 mm). Clamps
must not extend beyond the mounting rails.
Use M8 corrosion-proof screws and washers (diameter ≥ 0.62 in (15.8 mm)) for mounting slots (Detail A, Fig.1)
and M6 corrosion-proof screws and washers or bobtails for tracker slots (diameter ≥ 0.51 in (13 mm); Detail B,
Fig. 1). Mounting screws and washers should have the same material properties.
* Distance between outer edge of module and middle of the clamp.
2 Planning
2.3 Mounting options

INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11S.X / BFG 11
Tracker mounting options
Module Bolt Mounting rail
TRACKER INSTALLATION USING 15.7in400mm) HOLES
TB1a
L
Torque tube
TB2a
L1
L2
Torque tube
POSITION OF
BOLTS* in
TEST LOAD
PUSH/PULL Pa
DESIGN LOAD
PUSH/PULL Pa
POSITION OF
BOLTS* in
TEST LOAD
PUSH/PULL Pa
DESIGN LOAD
PUSH/PULL Pa
L40.6 (1031 mm) 1600 / 1600 1060 / 1060 L1 outer side:
40.6 (1031 mm)
2100 / 1800 1400 / 1200
L2
inner side:
20.9 or 32.9 or
40.6
(531 or 836 or
1031 mm)
TB2a
Ensure that module frame is fixed directly on the rail of the substructure (no spacer allowed between the
module and substructure).
Mounting rails need to extend beyond the middle of mounting holes by at least 0.7 in (17 mm).
TB1a, TB2a
Use M8 corrosion-proof screws and washers (diameter ≥ 0.62 in (15.8 mm)) for mounting slots (Detail A,
Fig.1) and M6 corrosion-proof screws and washers or bobtails for tracker slots (diameter ≥ 0.51 in (13 mm);
Detail B, Fig. 1). Mounting screws and washers should have the same material properties.
TRACKER INSTALLATION USING 31.1in790mm HOLES
TB1b
L
Torque tube
TB2b
L1
L2
Torque tube
POSITION OF
BOLTS* in
TEST LOAD
PUSH/PULL Pa
DESIGN LOAD
PUSH/PULL Pa
POSITION OF
BOLTS* in
TEST LOAD
PUSH/PULL Pa
DESIGN LOAD
PUSH/PULL Pa
L32.9 (836 mm) 2600 / 2300 1700 / 1500 L1 outer side:
32.9 (836 mm)
2600 / 2300 1730 / 1530
L2
inner side:
20.9 or 32.9
(531 or 836 mm)
TB2b
Ensure that module frame is fixed directly on the rail of the substructure (no spacer allowed between the
module and substructure).
Mounting rails need to extend beyond the middle of mounting holes by at least 0.7 in (17 mm).
TB1b, TB2b
Use M8 corrosion-proof screws and washers (diameter ≥ 0.62 in (15.8 mm)) for mounting slots (Detail A,
Fig.1) and M6 corrosion-proof screws and washers or bobtails for tracker slots (diameter ≥ 0.51 in (13 mm);
Detail B, Fig. 1). Mounting screws and washers should have the same material properties.
* Distance between outer edge of module and middle of the clamp.

INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11S.X / BFG12
Module Clamp Mounting rail
TRACKER INSTALLATION USING CLAMPS
TC1
L
POSITION OF
BOLTS* in
TEST LOAD
PUSH/PULL Pa
DESIGN LOAD
PUSH/PULL Pa
L40.6 - 42.6
(1031 - 1081 mm)
1800 / 1800 1200 / 1200
TC1 Ensure minimum support depth of 0.47 in (12 mm) on the backside and 0.39 in (10 mm) on the front side of
the module.
* Distance between outer edge of module and middle of the clamp.
2 Planning
2.3 Mounting options

INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11S.X / BFG 13
Fig. 2: Definition of limited areas.
NOTE!
For a requested push load maintain a minimum distance (clear-
ance) between the bottom module plane (level of bottom frame
leg) and closest substructure element below solar module lam-
inate. The minimum clearance is defined by the maximum test
push load and the limited area where the substructure element is
located beneath the module (see figure 2 and 3).
Fig. 3: Push loads in relation to minimum clearance between
frame bottom edge and substructure.
2 Planning
2.3 Mounting options
Specifications for TB1a, TB1b, TB2a, TB2b and TC1 Mounting Options
100 257257100 100
120
160 160
Limited area 1 [mm]
Limited area 2 [mm]
CLEARANCE [mm]
TEST LOAD [Pa]
Limited Area 1 Limited Area 2
5 10 15 20 25 30 35 40 45
200
600
400
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
50 55 60 65
Limited Area 1 Limited Area 2TB1b, TB2b
TB1a, TB2a, TC1

INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11S.X / BFG14
2 Planning
2.4 Electrical layout
Module Selection
For detailed key electrical data, please refer to the actual data
sheet referring to the relevant Module (available at www.qcells.
com).
For maximum energy yields, mismatches of specified electric
current (IMPP) of more than 5 % should be avoided for all mod-
ules connected in series.
Safety Factor
During normal operation, a module may generate a greater cur-
rent and / or higher voltage than that determined under standard-
ized test conditions. Accordingly, the values of ISC and VOC marked
on the module should be multiplied by a facot of 1.25 when de-
termining:
■the component voltage ratings,
■conductor ampacities,
■fuse sizes,
■size of controls connected to the PV output.
Refer to Section 690-8 of the National Electrical Code for an
additional multiplying factor of 125 percent (80 percent derating)
which might be applicable.
Please follow the valid national guidelines for the installation of
electrical systems (refer to section 690-8 of the NEC for an ad-
ditional multiplying factor of 125 percent [80 percent derating]
which may be applicable).
Series Connection
Connection of modules in series is only permitted up to the maxi-
mum system voltage as listed in the applicable data sheet.
Take into account all possible operating situations and all rel-
evant technical norms and regulations when designing the
system. It has to be ensured that the maximum system voltage,
including all necessary safety margins, is not exceeded.
Take the voltage limit of the inverter into account when deter-
mining the maximum number of modules in the string.
Parallel Connection
Modules may be damaged by the occurrence of reverse currents
(caused by module defects, ground leaks, or defective insulation).
Ensure that the maximum reverse current load capacity indicat-
ed in the data sheet is met.
In order to limit reverse currents that may occur, we recommend
using the following safety options:
1) Layout with a limited number of parallel connected strings :
Without undertaking further current blocking measures, a maxi-
mum of two module strings may be operated in parallel on a sin-
gle inverter or MPP tracker.
2) Layout with string fuses :
Use overcurrent devices (e.g. fuses) according to the relevant
standards in each string. Use gPV-fuses according to IEC 60269-
6. Observe the maximum permitted number of strings as indicat-
ed in the specifications provided by the respective string fuse
manufacturer and the technical guidelines.
NOTE!
When installing different product versions, the lowest minimum
permitted reverse current load capacity applies.
Inverters
Inverters with or without transformers may be used.

INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11S.X / BFG 15
Inspect the packaging for damages.
Contact the transport company regarding any dam-
age to the packaging and follow their instructions.
Follow any instructions on the packaging.
3 Installation
3.1 Safety and transport
Leave modules in their original packaging until instal-
lation.
Store the modules securely in cool and dry rooms.
The packaging is not weatherproof.
Ensure that all personnel are aware of and adhere to
accident-prevention and safety regulations.
While working wear clean gloves.
§
GB
§
I
§
D
Danger! Risk of fatal injury due to electric shock!
Do not install damaged modules.
Inform your distributor of any damages immediately.
Warning! Fire Risk!
Do not install modules indoors.
Do not install modules on moving objects.

INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11S.X / BFG16
3 Installation
3.1 Safety and Transport
Note! Module damage may occur!
Do not stack modules.
Note! Module damage may occur!
Do not install modules near flammable gas / vapors.
Do not install modules in close proximity to air condi-
tioning systems.
Note! Module damage may occur!
Do not drop modules.
Note! Module damage may occur!
Only make modifications to the module which have
been confirmed in writing by Qcells.
confirmation
letter
Note! Module damage may occur!
Never lift or move the module with the connection
cables or junction box.
Carry modules upright and horizontally as shown.
Note! Module damage may occur!
Never step on modules.
Do not subject modules to any mechanical stress.
Do not allow any objects to fall onto modules

INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11S.X / BFG 17
3 Installation
3.2 Preparation of installation
Danger! Risk of fatal injury due to electric shock!
Block o the installation zone.
Keep children and unauthorized individuals away
from the solar power system.
Danger! Risk of fatal injury due to electric shock!
Ensure that modules and tools are not subject to
moisture or rain at any time during installation.
Warning! Risk of injury due to falling modules!
Secure modules during installation.
Do not install modules in windy or wet weather.
Danger! Risk of fatal injury due to electric shock!
Only use dry, insulated tools.
Do not carry out the installation alone.
■Only install undamaged modules and components.
Do not modify the module
(e.g. do not drill any additional holes).

INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11S.X / BFG18
0.20 in (5 mm)
0.39 in
(10 mm)
3 Installation
3.3 Module installation
Option 1:
Fasten the module with 4 clamps in the specified
clamping range, see section "Mounting options with
clamps" of chapter "2.3 Mounting optoins".
Tighten clamps according to manufacturer’s instruc-
tions.
Maintain an interval of at least 0.39 in (10 mm) be-
tween two modules along the short side and
0.20 in (5 mm) along the long side.
Note! Module damage may occur!
Do not subject modules to mechanical tension. Max.
torsion 0.12 in / ft (10 mm / m).
Option 2:
Install the module at the 4 mounting points,
see see section “Mounting options with bolts” of
chapter “2.3 Mounting Options”.
Tighten screws according to manufacturer’s instruc-
tions.

INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11S.X / BFG 19
4 Electrical Connection
4.1 Safety
Danger!
Risk of fatal injury due to electric shock!
When disconnecting an electric circuit carrying direct current,
electric arcs can occur that may result in life-threatening injuries.
Do NOT unplug the cable when under load.
Do NOT connect any exposed cable ends.
Electrical work may only be performed by qualified and skilled
personnel (see page 3).
A solar module generates electrical current and voltage even
at a low intensity of illumination. Sparks and electric arcs may
result from the separation of a closed circuit. These can result
in life-threatening injuries. The danger increases when several
modules are connected in series.
Please be aware of that the entire open circuit voltage is active
even at low levels of solar irradiation.
Please follow the valid national regulations and safety guide-
lines for the installation of electrical devices and systems.
Please make sure to take all necessary safety precautions.
With module or phase voltages of more than 120 V, the safety
extra-low voltage range is exceeded.
Carry out work on the inverter and the wiring with extreme cau-
tion.
Ensure that the modules are disconnected at the inverter prior
to separation.
Be sure to observe the time intervals specified by the inverter
manufacturer after switching o the inverter.
Make sure that the plugs can not be connected unintentionally.
Before working on the contacts, check them for safety ex-
tra-low voltage.
Danger! Risk of fatal injury due to electric shock!
Only use dry, insulated tools for electrical work.
Danger! Risk of fatal injury due to electric shock!
Never touch live contacts with bare hands.
Cover connectors by suitable protective caps until
installation.
Danger! Risk of fatal injury due to electric shock!
Insulate any exposed cable ends.
Only connect cables with plugs.
Danger! Risk of fatal injury due to electric shock!
Never open the junction box.
Do not remove bypass diodes.

INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11S.X / BFG20
4 Electrical Connection
4.2 Electrical installation safety
Danger! Risk of fatal injury due to electric shock!
Be sure to maintain the time intervals as specified by
the inverter manufacturer between switching o the
inverter and beginning any further work.
Danger! Risk of fatal injury due to electric shock!
Never plug or unplug the cable when under load.
Modules must not carry any current.
1. Switch o the inverter.
OFF
EN
2. Switch o the DC circuit breaker.
3. Measure shutdown in DC String.
(no DC current flow).
4. Disconnect plugs by the use of appropriate
and qualified tools of the manufacturer.
5. When connecting the modules proceed in reverse
order.
Danger! Risk of fatal injury due to electric shock!
Electrical work may only be performed by qualified
and skilled personnel (see page 3).
Ensure correct polarity.