LONGI LR6-60 M Series User manual

Installation Manual for
LONGi Solar PV Modules
V10

Safety Note
01
• This manual elaborates on installation and safety use information for PV power gener-
ating modules (hereinafter referred to as module) of LONGi Solar Technology Co., Ltd.
(hereinafter referred to as LONGi). Please abide by all safety precautions in this guide
and local regulations.
• Installation of modules requires professional skills and knowledge and is to be carried
out by qualified personnel. Please read this manual carefully before installing and using
this module. Installation personnel shall get familiar with mechanical and electrical
requirements of this system. Please keep this manual properly as reference for future
maintenance or upkeep or for sales and treatment of modules.
• If you have any doubts, please contact LONGi global quality and customer service
department for further interpretation.
Applicable Module Type Status
Module
Structure
Monofacial
Module
LR6-60-***M LR6-72-***M IEC、UL single glass
LR6-60BK-***M LR6-72BK-***M IEC、UL single glass
LR6-60HV-***M LR6-72HV-***M IEC、UL single glass
LR6-60PB-***M LR6-72PB-***M IEC、UL single glass
LR6-60PE-***M LR6-72PE-***M IEC、UL single glass
LR6-60PH-***M LR6-72PH-***M IEC、UL single glass
LR6-60MP-***M LR6-72MP-***M IEC single glass
LR6-60MPH-***M LR6-72MPH-***M IEC single glass
LR6-60HPH-***M LR6-72HPH-***M IEC、UL single glass
LR6-60HPH-***MC LR6-72HPH-***MC IEC、UL single glass
LR6-60HPB-***M / IEC、UL single glass
LR6-60OPH-***M LR6-72OPH-***M IEC single glass
LR6-60DG-***M LR6-72DG-***M IEC、UL double glass
LR6-60PD-***M LR6-72PD-***M IEC、UL double glass
LR6-60HPD-***M LR6-72HPD-***M IEC、UL double glass
LR6-60HIH-***M LR6-72HIH-***M IEC、UL single glass
LR6-60HIB-***M / IEC、UL single glass
LR4-60HPH-***M LR4-72HPH-***M IEC、UL single glass
LR4-60HPB-***M / IEC、UL single glass
LR4-60HIH-***M LR4-72HIH-***M IEC、UL single glass
LR4-60HIB-***M / IEC、UL single glass
LR5-66HPH-***M LR5-72HPH-***M IEC、UL single glass
LR5-66HIH-***M LR5-72HIH-***M IEC、UL single glass
Bifacial
Module
LR6-60BP-***M LR6-72BP-***M IEC、UL double glass
LR6-60HBD-***M LR6-72HBD-***M IEC、UL double glass
LR6-60HBD-***MC LR6-72HBD-***MC IEC、UL double glass
/ LR6-78HBD-***M IEC、UL double glass
LR6-60OPD-***M LR6-72OPD-***M IEC double glass
LR6-60HIBD-***M LR6-72HIBD-***M IEC、UL double glass
LR4-60HBD-***M LR4-72HBD-***M IEC、UL double glass
LR4-60HIBD-***M LR4-72HIBD-***M IEC、UL double glass
LR5-66HBD-***M LR5-72HBD-***M IEC、UL double glass
LR5-66HIBD-***M LR5-72HIBD-***M IEC、UL double glass

Contents
1 / Introduction
2 / Laws and Regulation
3 / General Information
4 / Installation Conditions
4.1 Installation Site and Working Environment
4.2 Selection of Tilt Angles
5 / Mechanical Installation
6 / Electrical installation
7 / Grounding
8 / Operation and maintenance
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02
3.1 Modules Identification
3.2 Junction box style and wiring method
3.3 Regular Safety
3.4 Electrical Performance Safety
3.5 Operation Safety
3.6 Fire Safety
5.1 Regular Requirements
5.2 Monofacial assembly mechanical installation
5.2.1 Bolts Mounting
5.2.2 Clamp Mounting
5.2.3 Installation and Mechanical Load of Monofacial
Module
5.3 Bifacial module Mechanical Installation
5.3.1 Bolts Mounting
5.3.2 Clamps Installation
5.3.3 Installation and Mechanical Load of Bifacial Module
6.1 Electrical Performance
6.2 Cables and Wiring
6.3 Connector
6.4 Bypass diode
6.5 PID Protection and Inverter Compatibility
8.1 Cleaning
8.2 Module Appearance Inspection
8.3 Inspection of Connectors and Cables

1
Electrical and mechanical installation information will be introduced in this installation manual, so please read and under-
stand the information before installing LONGi modules. In addition, this manual also contains some safety information that
you shall be familiar with. All contents in this manual are intellectual properties of LONGi which originates from long term of
technical exploration and experience accumulation of LONGi.
This installation manual does not entail any explicit or implicit quality warranty and does not stipulate on compensation
schemes for losses, module damages or other costs caused by or related to module installation, operation, utilization and
maintenance process. LONGi will not take any responsibility if patent rights or the third party rights are infringed by use of
modules. LONGi reserves the rights for modifying product manual or installation manual without noticing in advance. It is
recommended to visit our website regularly at www.longi-solar.com for the latest version of this installation manual.
If customers fail to install modules as per requirements set forth in this manual, the limited warranty provided for customers
will be invalid. In addition, suggestions in this manual are to improve safety of module installation, which are tested and
proved by practices. Please provide this manual to PV system users for reference and advise on PPE(Personal Protective
Equipment), operation and maintenance requirements and other suggestions.
2
Introduction
Laws and Regulation
The mechanical and electrical installation of photovoltaic modules shall be in accordance with applicable regula-
tions, including electrical law, construction law and electrical connection requirements. These regulations vary
from sites to sites, for example, building roof installation, vehicle applications, etc. Requirements may also vary
depending on the installed system voltage, DC or AC. Please contact local authorities for specific terms.
03

3General Information
3.1 Modules identification
3 labels on the modules contain information below:
1. Nameplate: product type, rated power, rated current, rated voltage, open circuit voltage, short circuit current under testing
conditions, certification indicator, maximum system voltage, etc.
2. Current classification label: Rated working current.(H indicates High, M indicates Medium, L indicates Low)
3. Serial Number label: A unique serial number which is laminated inside the module permanently which can be found in the
front of the module. There is another same serial number beside the module nameplate.
6
1234
5
04
Figure 1 Regular modules Mechanical drawing
(Please refer to section 3.2 for the location of the junction box. The specific version is subject to the corresponding specification.)
1 Frame 2 Glass 3 EVA 4 Solar Cell
5 Backsheet 6 Silica Gel 7 Junction Box 8 Name Plate
9 Cable 10 Connector 11 Mounting Hole 12 Grounding Hole
13 Drain Hole 14 Bar Code
12
7
10 10
8
99
14
13
11

Bifacial Modules (With Frame)
Bifacial Modules (Frameless)
2
34
3
5
12
3
4
5
05
Figure 2 Regular Modules Mechanical Drawing
（Please refer to section 3.2 for the location of the junction box. The specific version is subject to the corresponding specification.）
1 Frame 2 Front Glass 3 EVA / POE 4 Solar Cell
5 Back Glass 6 Sealent 7 Junction Box 8 Name Plate
9 Mounting Holes 10 Grounding Holes 11 Drain Holes 12 Bar Code
10
9
7
8
12
11

06
3.2 Junction box style and wiring method
Junction Box Location Icon Recommended Wiring Method
Vertical Installation: Standard Cable Length
(Note：One end of the single row needs to be extended.
Horizontal Installation: Standard Cable Length
Vertical Installation: Standard Cable Length
(Note: One end of the single row needs to be extended.)
Horizontal Installation：60 type PV module cable length ≥1.2m, 72 type PV
module cable length ≥1.4m

07
Junction Box Location Icon Recommended Wiring Method
Vertical Installation: Standard Cable length：
(Note: An extension cord is required at the rotor head of the double row
assembly and at the end of the single row.)
Horizontal Installation:
60 type PV module cable length ≥1.2m, 72 type PV module cable length
≥1.4m, 78 type PV module cable length ≥1.5m
Vertical Installation:
Method 1: Standard cable length Method 2: Single component cable
length ≥1.2m
Horizontal Installation：Standard cable length

08
The application level of LONGi Solar module is Class Ⅱ, which can be used in systems operating at > 50 V DC or >240
W, where general contact access is anticipated;
When the modules are for rooftop application, it is necessary to take the overall fire rating of the finished structure as well
as operation and maintenance into account. The roofing PV system shall be installed after being evaluated by construc-
tion experts or engineers and with official analysis results for the entire structure. It shall be proved capable of supporting
extra system bracket pressure, including PV module weight.
For your safety, please do not work on the roof without PPE(Personal Protective Equipment) which include but not limited
3.3 Regular Safety
Figure 3 Junction Box Style and Wiring Method
to fall protection, ladder or stair and personal protective measures.
For your safety, please do not install or handle modules in unsafe conditions including but not limited to strong wind or
gust, damp or sandy roofs.
Junction Box Location Icon Recommended Wiring Method
Vertical installation:
Method 1: Standard cable length Method 2: Single component cable
length ≥1.2m
Horizontal Installation: Standard cable length

The application level of LONGi Solar module is Class Ⅱ, which can be used in systems operating at > 50 V DC or >240
W, where general contact access is anticipated;
When the modules are for rooftop application, it is necessary to take the overall fire rating of the finished structure as well
as operation and maintenance into account. The roofing PV system shall be installed after being evaluated by construc-
tion experts or engineers and with official analysis results for the entire structure. It shall be proved capable of supporting
extra system bracket pressure, including PV module weight.
For your safety, please do not work on the roof without PPE(Personal Protective Equipment) which include but not limited
09
PV modules can produce DC current under illumination, any contact of the exposed metal of the modules connection wires
may result in electrical shock or burn. Any contact of 30V or larger DC Voltage can be fatal.
In case of no connected load or external circuits, modules can still produce voltage. Please use insulation tools and wear
rubber gloves when operating modules in the sunlight.
No switch is on the PV modules. Operating of PV modules can only be stopped when they are kept from sunlight or covered by
hard board or UV-proof materials or when the angle of the modules facing sun are placed on smooth and flat surfaces.
To avoid electric arc or electric shock hazards, please do not break down electric connection in loaded conditions. Incorrect
connections will also lead to electric arc or shock. Keep connectors dry and clean and make sure that they are in good
operating condition. Do not insert other metals into the connectors or carry out electric connection by whatever means.
Snow, water or other reflective medium in surrounding environments that intensify light re-flection will increase output current
and power. And module voltage and power will increase under low temperature condition.
If module glass or other sealing materials are damaged, please wear PPE(personal protective equipment) and then isolate
modules from the circuit.
Do not operate when modules are wet unless you wear PPE(personal protective equipment). Please follow the cleaning
requirements in this manual when cleaning modules.
Do not contact connectors with the following chemicals: Gasoline, White Flower oil , woodlock oil, Mold temperature oil, Engine
oil （such as KV46）, Grease（such as Molykote EM-50L）, Lubricating oil, Rust-proof oil, Stamping oil, Diesel, Cooking oil,
Acetone, alcohol, essential balm, Bone-setting liquid, Banana oil, release agent（such as Pelicoat S-6）, adhesive and potting
materials capable of generating oxime gas（such as KE200、CX-200、chemlok）, TBP, cleaning agent etc.
3.4 Electrical Performance Safety
3.5 Operation Safety
to fall protection, ladder or stair and personal protective measures.
For your safety, please do not install or handle modules in unsafe conditions including but not limited to strong wind or
gust, damp or sandy roofs.

10
Please refer to local laws and regulations before installing modules and abide by requirements on building fire protection.
According to the corresponding certification standards, the fire rating of LONGi modules is Class C.
The roof should be coated by a layer of fireproof materials with suitable fire protection rating for roofing installation and
make sure that the back sheet and the mounting surface are fully ventilated.
Different roof structures and installation modes will affect fireproof performance of buildings. Improper installation may
lead to the risk of fire.
To guarantee roof fire rating, the distance between module frame and roof surface must be ≥10cm. (4in)
Adopt proper module accessories such as fuse, circuit breaker and grounding connector according to local regulations.
Please do not apply modules in where exposed inflammable gases are nearby.
3.6 Fire Safety
• Open modules outer Package when installation.
• Do not damage the package and do not drop packaged modules on the ground.
• Do not exceed the indicated maximum layer limit on the packaging carton when piling
modules up.
• Put packaging carton in the ventilated, water-proof and dry places before unpacking
modules.
• Follow unpacking instructions when Opening packaging carton.
• Carrying modules with the junction box or wires are strictly forbidden.
• Do not stand or walk on modules.
• To avoid glass to be damaged, heavy objects are not allowed on modules.
• Be careful when placing modules at corners in particular.
• Do not try to dismantle the module or remove nameplate or parts of modules.
• Do not paint or apply any other adhesive on modules.
• Do not damage or scratch backsheet of modules.
• Do not drill holes on the frame of module, which may reduce frame loading capacity and
lead to frame corrosion and invalidation of the limited warranty provided for customers
• Do not scratch anodic coating of aluminum alloy frame except for grounding connection.
Scratch may lead to frame corrosion and reduce frame loading capacity and long-term
reliability.
• Do not repair problematic modules on your own.

4Installation Conditions
11
4.1 Installation Site and Working Environment
• The modules cannot be used in space
• Do not manually focus sunlight with mirrors or magnifying glass onto modules.
• LONGi modules shall be installed on proper buildings or other appropriate places (such as ground, garage, building outer
wall, roof, PV tracking system) but shall not be installed on any vehicles.
• Do not install modules at places that are possible to be flooded.
• LONGi suggests that modules be installed in the working environment with the temperature of -20℃to 50℃of which is
the monthly average highest and lowest temperature of the installation sites. The extreme working environment
temperature for modules is -40℃to 85℃.
• Make sure that installed modules do not suffer wind or snow pressure that exceeds the permissible maximum load limit.
• Modules shall be installed in places free from shadows throughout the year. Make sure there are no light-blocking
obstacles in the installation sites.
• Carry out lightning protection for modules installed in places with frequent lightning and thunder.
• Do not install modules in places with possible inflammable gases.
• Modules cannot be used in environments with too much hails, snows, flue gas, air pollution and soot or in places with
strong corrosive substances such as salt, salt mist, saline, active chemical steam, acid rain, or other substances
corroding modules, affecting modules’ safety or performance.
• Please take protective measures to ensure reliable and safe installation of modules in severe environments such as
heavy snow, cold and strong wind or islands close to water and salt mist or deserts.
• LONGi modules passed the IEC61701 salt spray corrosion test, but the corrosion may still occur on where the modules
frame is connected to the bracket or where the grounding is connected. In case LONGi modules are installed
50m –500m away from the ocean side, stainless steel or aluminum materials are need to be used to contact the PV
modules, and the connection point should be protected with anti-corrosion measures.
LONGi modules have passed the IEC61701 salt spray corrosion test, but the corrosion
may still occur on where the modules frame is connected to the bracket or where the
grounding is connected. LONGi modules can be installed 50m –500m away from the
ocean side, but stainless steel or aluminum material are needed to be used in where
contacting PV modules and apply anti-corrosion measurement on the connection point.

12
Module
Tilt Angle
Sun Light
4.2 Selection of Tilt Angles
Tilt angle of modules: Included angle between module surface and horizontal surface; the module will obtain the
maximum power output in direct facing of sunlight.
Modules are preferred to be south-facing in the north hemisphere and north-facing in the south hemisphere.
Please refer to standard modules installation guideline or suggestions from experienced PV module installer, for the
specific installation angle.
LONGi suggests that tilt angle of module installation be no less than 10°, so module surface dust can be washed away
easily by rainfall and frequency of cleaning can be reduced. And it is easy for ponding to flow away and avoid water mark
on the glass due to long time of water ponding which may further affect module appearance and performance.
LONGi modules connected in string should be installed with the same orientation and tilt angle. Different orientations and
tilt angles may result in different received solar irradiation and output power loss. In order to achieve the maximum annual
generating capacity, the optimal orientation and inclination of PV modules in the installed area should be selected to
ensure that sunlight can still reach to modules even on the shortest day of the year.
If LONGi modules are used in off-grid System, the tilt angle should be calculated based on seasons and irradiation to
maximize the output power. If the modules output power meets the acquired load under the period of the worst irradiation
in the year, the modules should be able to meet the load of the whole year. If the LONGi modules are used in grid-con-
nected system, the tilt angle should be calculated based on the principle to maximize the yearly output power.

5Mechanical Installation
13
5.2 Monofacial assembly mechanical installation
5.1 Regular Requirements
• Make sure that module installation mode and bracket system can meet the expected load, which is requisite assurance
that the bracket installer must provide. Installation bracket system shall be tested and inspected by the third party testing
institution with static mechanical analysis capacity in accordance with local national standards or international standards.
• Module bracket shall be made from durable, corrosion resistant, UV-proof materials.
• Modules shall be fixed on the bracket solidly.
• Use higher brackets in places with heavy snow accumulation so the lowest point of modules will not be shadowed by
snow for a long time. In addition, make the lowest point of modules high enough so as to avoid shading of vegetation
and woods or reduce damage of sands and stones.
• If modules are installed on brackets parallel to the roof or wall, the minimum gap between the module frame and the
roof/wall shall be 10cm for air ventilation in case of module wire damage.
• Make sure the building is suitable for installation before installing modules on roof. Moreover, seal properly to
prevent leakage.
• The module frames can appear thermal expansion and cold contraction so the frame interval between two adjoining
modules shall be no less than 10mm.
• Make sure that backsheet of modules will not be in contact with bracket or building structures that can pierce into the
inside of the modules, especially when the module surface is imposed by pressure.
• Maximum static load of the PV module is downforce 5400pa and uplift force 2400pa, which can vary from different
mounting methods of the modules (please refer to the following installation guidance), the described load in this manual
is for the test load.
• Note: on the basis of IEC61215 - 2016 installation requirements, when computing the corresponding maximum design
load, need to consider the safety factor of 1.5 times.
• Modules can be installed horizontally or vertically. When installing the components, be cautious not to block the drain
hole of the frame.
Module and bracket system connection
can be realized by mounting holes,
clamps or embedded systems. Installa-
tion shall follow the demonstration and
suggestions below. If installation mode
is different, please consult LONGi and
obtain approval. Otherwise, modules
may be damaged and limited warranty
will be invalid.

Recommended accessories are as below :
Figure 4 Bolt Installation of Monofacial Module
14
5.2.1 Bolts Mounting
Apply bolts to fix modules on the bracket through mounting holes on the back frame. See details in Figure 4.
Suggestion :（1）M8 bolt tightening torque range: 14N•m-18N•m; M6 bolt tightening torque range: 8N•m-12N•m;
（2） When using LONGi 30mm (30H) height frame module, it is recommended to select L ≤ 20mm length
fasteners. (If there is a special model, consult LONGi customer service);
5.2.2 Clamp Mounting
The module can be mounted by a dedicated clamp, as shown in Figure 5.
Under no circumstances should the clamp touch the glass or deform the frame. The interface of the clamp to the front of
the frame must be smooth and flat to prevent frame or other components from being damaged.
Make sure no shadowing effect of the fixture.
The drain hole cannot be blocked by the fixture.
For framed PV module，the clamp must maintain an overlap of 8-11 mm with the frame of the module (you can change
the cross section of the clamp if the module is securely installed). For frameless PV module，the clamp must maintain an
overlap of 15 mm at maximum with the module.
400mm
8 installation holes
(4 inner, 4 outer)
Use M8 bolts
4 400mm-span
installation holes
Use M6 bolts
Accessories Model Material Note
Bolt M8 (full thread
recommended)
M6 (full thread
recommended) Q235B/SUS304 Accessories
material selection
should be based
on application
environment.
Washer 2*8 2*6（6.4*18-1.6 ISO 7093）Q235B/SUS304
Spring Washer 8 6 Q235B/SUS304
Nut M8 M6 Q235B/SUS304

Figure 6 Monofacial Module Installation Annex
15
Figure 5 Clamp Installation of Monofacial Module
bolt
bolt
laminated part
laminated part
aluminum frame aluminum
frame
bracket bracket
washer
washer
washer
spring washer
clamp
clamp
washer
spring washer
nut
nut
5.2.3 Installation and Mechanical Load of Monofacial Module
Monofacial modules can be installed with bolts into 4 outer installation holes, bolts into 4 inner installation holes, bolts into
400mm-span installation holes, and fixtures. Detailed installation positions and corresponding load capacities are shown
in the table below.
Installation with bolts into 4 outer holes
Beam perpendicular to long sides
Installation with bolts into 4 inner holes
Beam perpendicular to long sides
Installation with bolts into 400mm-span holes
(distance between frame and tube C≤30mm)
Beam perpendicular to long sides
(clamp length≥40mm)
Beam perpendicular to short sides
(clamp length≥40mm)
on long sides
(clamp length=150mm)

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Load Capacities of Framed Monofacial Modules:
Installation
Method
Module Type
Installation with bolts
4 outer holes
(beam
perpendicular
to long sides)
4 inner holes
(beam
perpendicular
to long sides)
400mm-
span
holes
1/4L-50≤D≤1/4L+50
(beam perpendicular
to long sides)
300 ≦D≦400
(beam
perpendicular
to long sides)
350≤D≤450
(beam perpendicular
to long sides)
150≤E≤250
(beam
perpendicular
to short sides)
60/66-type Framed Monofacial Module
LR6-60-***M ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR6-60HV-***M ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR6-60BK-***M ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR6-60PE-***M ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR6-60PH-***M ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR6-60PB-***M ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR6-60MP-***M ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR6-60MPH-***M ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR6-60HPH-***M ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR6-60HPH-***MC ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR6-60HPB-***M ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR6-60HIH-***M ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR6-60HIB-***M ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR6-60DG-***M ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR6-60PD-***M ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR6-60HPD-***M ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR6-60OPH-***M +5400， -2400 ±2400 / / +5400， -2400 / ±2400
LR4-60HPH-***M ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR4-60HPB-***M ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR4-60HIH-***M ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR4-60HIB-***M ±2400 +5400， -2400 / +5400， -2400 / / ±2400
LR5-66HPH-***M +5400， -2400 ±2400 ±2400 / / +5400， -2400 /
LR5-66HIH-***M +5400， -2400 ±2400 ±2400 / / +5400， -2400 /
72-type Framed Monofacial Module
LR6-72-***M +5400， -2400 ±2400 ±2400 +5400， -2400 / / /
LR6-72HV-***M +5400， -2400 ±2400 ±2400 +5400， -2400 / / /
LR6-72BK-***M +5400， -2400 ±2400 ±2400 +5400， -2400 / / /
LR6-72PE-***M +5400，
-2400 ±2400 ±2400 +5400， -2400 / / /
LR6-72PH-***M +5400， -2400 ±2400 ±2400 +5400， -2400 / / /
LR6-72PB-***M +5400， -2400 ±2400 ±2400 +5400， -2400 / / /
LR6-72MP-***M +5400， -2400 ±2400 ±2400 +5400， -2400 / / /
LR6-72MPH-***M +5400，
-2400 ±2400 ±2400 +5400， -2400 / / /
LR6-72HPH-***M +5400， -2400 ±2400 ±2400 +5400， -2400 / / /
LR6-72HPH-***MC +5400， -2400 ±2400 ±2400 +5400， -2400 / / /
LR6-72HIH-***M +5400， -2400 ±2400 ±2400 +5400， -2400 / / /
LR6-72DG-***M +5400， -2400 ±2400 ±2400 +5400， -2400 / / /
LR6-72PD-***M +5400， -2400 ±2400 ±2400 +5400， -2400 / / /
LR6-72HPD-***M +5400， -2400 ±2400 ±2400 +5400， -2400 / / /
LR6-72OPH-***M +5400， -2400 ±2400 ±2400 / +5400， -2400 / /
LR4-72HPH-***M +5400， -2400 ±2400 ±2400 / / +5400， -2400 /
LR4-72HIH-***M +5400， -2400 ±2400 ±2400 / / +5400， -2400 /
LR5-72HPH-***M +5400， -2400 ±2400 ±2400 / / +5400， -2400 /
LR5-72HIH-***M +5400， -2400 ±2400 ±2400 / / +5400， -2400 /

17
5.3 Bifacial module Mechanical Installation
Modules and mounting system can be connected by bolts, clamps or embedded systems. Installation shall follow the
demonstration and suggestions below. If installation mode is different, please consult LONGi and obtain approval.
Otherwise, modules could be damaged and quality warranty will be invalid.
5.3.1 Bolts Mounting
Apply bolts to fix modules on the bracket through mounting holes on the back frame. See details in Figure 7. A is the
overlapping size of module frame and bracket.
Load Capacities of Frameless Monofacial Double-Glass Modules:
Figure 7 Bolt Installation of Bifacial Module
400mm
4 400mm-span
installation holes
Use M6 bolts
8 installation holes
(4 inner, 4 outer)
Use M8 bolts
Installation Method
Module Type 300≤S≤400 400≤S≤500
60-type
LR6-60PD-***M ﹢5400
，-2400 /
LR6-60DG-***M ﹢5400
，-2400 /
LR6-60HPD-***M ﹢5400
，-2400 /
72-type
LR6-72PD-***M / ±2400
LR6-72DG-***M / ±2400
LR6-72HPD-***M / ±2400

Recommended accessories are as below :
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Suggestion :（1）M8 bolt tightening torque range: 14N•m-18N•m; M6 bolt tightening torque range: 8N•m-12N•m;
（2）When using LONGi 30mm (30H) height frame module, it is recommended to select L ≤ 20mm length
fasteners. (If there is a special model, consult LONGi customer service);
5.3.2 Clamps Installation
See details in Figure 8.
The clamp shall not be in touch with glass or deform module frame in any case. The interface of the clamp and frame
front side shall be flat and smooth to prevent frame and module being damaged.
Avoid the shadow blocking effect of the clamp.
The drain hole cannot be blocked by the clamp. For framed PV module，the clamp must maintain an overlap of at least 8
mm but no more than 11 mm with the frame of the module (you can change the cross section of the fixture if the module
is securely installed).For frameless PV module，the clamp must maintain an overlap of 15 mm at maximum with the
module.
Accessories Model Material Note
Bolt M8 (full thread
recommended)
M6 (full thread
recommended) Q235B/SUS304 Accessories
material selection
should be based
on application
environment.
Washer 2*8 2*6（6.4*18-1.6 ISO 7093）Q235B/SUS304
Spring Washer 8 6 Q235B/SUS304
Nut M8 M6 Q235B/SUS304

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Figure 8 Clamp Installation of Bifacial Module
5.3.3 Installation and Mechanical Load of Bifacial Module
Bifacial modules can be installed with bolts into 4 outer installation holes, bolts into 4 inner installation holes, bolts into
400mm-span installation holes, and fixtures. Detailed installation positions and corresponding load capacities are shown
in the table below.
Framed PV Module
Frameless PV Module
Bolt
Lower side clamp
Bracket
Upper side clamp
Bolt
Lower side clamp
Frameless module
Bracket
Upper side clamp
EPDM
EPDM