LONGi Solar LR6 Solar PV Modules Instruction Manual

LR6 Solar PV Modules

Product Information:

The product is the LONGi Solar PV Modules V16. It is available
in both Monofacial and Bifacial module types. The specific module
types are LR6-72-M, LR6-72BK-M, LR6-72HV-M, LR6-72PB-M,
LR6-72PE-M, LR6-72PH-M, LR6-72MP-M, LR6-72MPH-M,
LR6-72HPH-M, LR6-72HPH-MC / LR6-72OPH-M, LR6-72DG-M,
LR6-72PD-M, LR6-72HPD-M, LR6-72HIH-M, LR4-72HPH-M,
LR4-72HIH-M, LR5-72HPH-M, LR5-72HIH-M, LR5-72HTH-M,
LR4-72HBD-M, LR4-72HIBD-M, LR5-72HBD-M, LR5-72HIBD-M,
LR5-72HND-M, and LR5-72HTD-M.

The product is compliant with IECUL standards.

The installation manual covers various topics including laws and
regulations, general information, installation conditions,
mechanical installation, electrical installation, grounding, and
operation and maintenance.

Product Usage Instructions:

1. Introduction

Before installing the LONGi Solar PV Modules V16, it is
important to familiarize yourself with the applicable laws and
regulations regarding electrical and construction requirements.
These requirements may vary depending on the installation site and
system voltage. Contact local authorities for specific terms.

2. Laws and Regulation

Ensure that the mechanical and electrical installation of the
photovoltaic modules comply with applicable regulations, including
electrical law, construction law, and electrical connection
requirements. These regulations may differ based on the
installation site (e.g., building roof or vehicle applications) and
system voltage (DC or AC).

3. General Information

3.1 Modules Identification

The LONGi Solar PV Modules V16 consists of various components,
including a frame, glass, solar cells, EVA, backsheet, junction
box, cables, connectors, and grounding holes. Refer to Figure 1 in
the manual for a typical mechanical drawing of Monofacial Modules.
The location of the junction box may vary depending on the specific
module type.

4. Installation Conditions

4.1 Installation Site and Working Environment

Select an appropriate installation site for the PV modules,
considering factors such as sunlight exposure, shading, and
structural stability. The working environment should be safe and
suitable for installation activities.

4.2 Selection of Tilt Angles

Choose the optimal tilt angles for the PV modules based on
factors like geographical location and desired energy output. The
manual provides guidelines for selecting tilt angles.

5. Mechanical Installation

5.1 Regular Requirements

Follow the regular requirements for mechanical installation,
ensuring proper mounting and alignment of the PV modules.

5.2 Monofacial Assembly Mechanical Installation

For Monofacial Modules, the manual provides instructions for
bolts mounting, clamp mounting, and the installation and mechanical
load of the modules.

5.3 Bifacial Module Mechanical Installation

For Bifacial Modules, the manual provides instructions for bolts
mounting, clamps installation, and the installation and mechanical
load of the modules. Different instructions are provided for
Bifacial Modules with frames and frameless Bifacial Modules.

6. Electrical Installation

6.1 Electrical Performance

The manual provides information on the electrical performance of
the PV modules.

6.2 Cables and Wiring

Follow the guidelines for proper selection, routing, and
connection of cables and wiring for the PV modules.

6.3 Connector

The manual provides instructions for connector installation and
usage.

6.4 Bypass Diode

Learn about the bypass diode and its role in the PV module’s
electrical performance and protection.

6.5 PID Protection and Inverter Compatibility

Understand the PID (Potential-Induced Degradation) protection
measures and ensure compatibility with inverters.

7. Grounding

The manual provides information on grounding requirements for
the PV modules.

8. Operation and Maintenance

8.1 Cleaning

Learn how to clean and maintain the PV modules to ensure optimal
performance.

8.2 Module Appearance Inspection

Perform regular inspection of the module appearance to identify
any issues or damages.

8.3 Inspection of Connectors and Cables

Regularly inspect and maintain connectors and cables for proper
functionality and safety.

9. Release and Execution

Follow the instructions and guidelines provided in the manual to
safely and effectively install, operate, and maintain the LONGi
Solar PV Modules V16.

Installation Manual for LONGi Solar PV Modules
V16

Applicable Module Type

Monofacial Module
Bifacial Module

LR6-60-M LR6-60BK-M LR6-60HV-M LR6-60PB-M LR6-60PE-M LR6-60PH-M LR6-60MP-M LR6-60MPH-M LR6-60HPH-M LR6-60HPH-MC LR6-60HPB-M LR6-60OPH-M LR6-60DG-M LR6-60PD-M LR6-60HPD-M LR6-60HIH-M LR6-60HIB-M LR4-50HPH-M LR4-60HPH-M LR4-60HPB-M LR4-60HIH-M LR4-60HIB-M LR4-66HPH-M LR4-66HP-M LR4-66HIH-M LR5-54HPH-M LR5-54HPB-M LR5-54HIH-M LR5-54HIB-M LR5-54HNB-M LR5-54HTH-M LR5-54HTB-M LR5-66HPH-M LR5-66HIH-M / LR4-60HBD-M LR4-60HIBD-M LR5-54HIBD-M LR5-54HIBB-M LR5-54HABD-M LR5-54HABB-M LR5-66HBD-M LR5-66HIBD-M

LR6-72-M LR6-72BK-M LR6-72HV-M LR6-72PB-M LR6-72PE-M LR6-72PH-M LR6-72MP-M LR6-72MPH-M LR6-72HPH-M LR6-72HPH-MC / LR6-72OPH-M LR6-72DG-M LR6-72PD-M LR6-72HPD-M LR6-72HIH-M / / LR4-72HPH-M / LR4-72HIH-M / / / / / / / / / / / LR5-72HPH-M LR5-72HIH-M LR5-72HTH-M LR4-72HBD-M LR4-72HIBD-M LR5-72HBD-M LR5-72HIBD-M LR5-72HND-M LR5-72HTD-M / /

Status
IECUL IECUL IECUL IECUL IECUL IECUL IEC IEC IECUL IECUL IECUL IEC IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL IECUL

*The information of frameless modules and LR6 types are shown in the V15 version of LONGi PV Module Installation Manual.

Module Structure
single glass single glass single glass single glass single glass single glass single glass single glass single glass single glass single glass single glass double glass double glass double glass single glass single glass single glass single glass single glass single glass single glass single glass single glass single glass single glass single glass single glass single glass single glass single glass single glass single glass single glass single glass double glass double glass double glass double glass double glass double glass double glass double glass

Safety Note
01

· This manual elaborates on installation and safety use information for PV power generating 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 customer service personnel for further interpretation.

Contents

3

1 / Introduction

3

2 / Laws and Regulation

4

3 / General Information

4

3.1 Modules Identification

6

3.2 Junction box style and wiring method

8

3.3 Regular Safety

9

3.4 Electrical Performance Safety

9

3.5 Operation Safety

10

3.6 Fire Safety

11

4 / Installation Conditions

11

4.1 Installation Site and Working Environment

12

4.2 Selection of Tilt Angles

13

5 / Mechanical Installation

13

5.1 Regular Requirements

13

5.2 Monofacial assembly mechanical installation

14

5.2.1 Bolts Mounting

14

5.2.2 Clamp Mounting

15

5.2.3 Installation and Mechanical Load of Monofacial Module

17

5.3 Bifacial module Mechanical Installation

17

5.3.1 Bolts Mounting

18

5.3.2 Clamps Installation

19

5.3.3 Installation and Mechanical Load of Bifacial Module

23

6 / Electrical installation

23

6.1 Electrical Performance

23

6.2 Cables and Wiring

24

6.3 Connector

24

6.4 Bypass diode

24

6.5 PID Protection and Inverter Compatibility

25

7 / Grounding

26

8 / Operation and maintenance

26

8.1 Cleaning

27

8.2 Module Appearance Inspection

27

8.3 Inspection of Connectors and Cables

27

9 Release and execution

02

1 Introduction
Electrical and mechanical installation information will be introduced in this installation manual, so please read and understand 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.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 inform the advises on operation, maintenance requirements etc.
2 Laws and Regulation
The mechanical and electrical installation of photovoltaic modules shall be in accordance with applicable regulations, 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

3 General Information
3.1 Modules identification
Three labels on the module contain the 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.

8 14

1

2

3

6

4

7

9 10

10 9

5

11

12

13

1 Frame 5 Backsheet 9 Cable 13 Drain Hole

2 Glass 6 Silica Gel 10 Connector 14 Bar Code

3 EVA 7 Junction Box 11 Mounting Hole

4 Solar Cell 8 Name Plate 12 Grounding Hole

Figure 1 Typical Mechanical Drawing of Mono-facial Modules
(Please refer to section 3.2 for the location of the junction box. The specific version is subject to the corresponding specification.)

04

1

2

12

3

7

4

5

8

9

Bifacial Modules (With Frame)

11

10

2
3 4 3

5
Bifacial Modules (Frameless)

1 Frame 5 Back Glass 9 Mounting Holes

2 Front Glass 6 Sealant 10 Grounding Holes

3 EVA/POE 7 Junction Box 11 Drain Holes

4 Solar Cell 8 Name Plate 12 Bar Code

Figure 2 Typical 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.

05

3.2 Junction box style and wiring method Junction Box Location Icon Recommended Wiring Method
Vertical Installation: Standard Cable Length (NoteOne 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 Installation60 type PV module cable length 1.2m, 72 type PV module cable length 1.4m
06

Junction Box Location Icon Recommended Wiring Method
Vertical Installation: Standard Cable length

NoteThe extra extended cable is required for connection at the turn-back corner of wiring as shown below.
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 InstallationStandard cable length

07

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 Figure 3 Junction Box Style and Wiring Method

3.3 Regular Safety
The application level of LONGi Solar module is Class û, 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 construction experts or engineers and with official analysis results for the entire structure. It shall be proved capable of supporting extra weight of system racking structures and PV modules. For your safety, please do not work on the roof without PPE(Personal Protective Equipment) which include but not limited
08

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.
3.4 Electrical Performance Safety
PV modules can produce DC current under sunlight. Any contact of exposed metal at module’s wiring parts 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 csuch as KV46, Greasecsuch as Molykote EM-50L, Lubricating oil, Rust-proof oil, Stamping oil, Diesel, Cooking oil, Acetone, alcohol, essential balm, Bone-setting liquid, Banana oil, release agenct such as Pelicoat S-6, adhesive and potting materials capable of generating oxime gascsuch as KE200aCX-200achemlok, TBP, cleaning agent etc.
3.5 Operation Safety
09

· 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.
3.6 Fire Safety
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 Mono-facial modules is UL type 1or2 or IEC Class C, the fire rating of LONGi bifacial modules is UL type 29 or IEC 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. (0.39 inch) 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.
10

4 Installation Conditions
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 -40¥ to 40¥ 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 can be installed 50m away from the ocean side, and related parts and components should be protected with anti-corrosion measures.
11

4.2 Selection of Tilt Angles
Tilt angle of PV modules refer to the included angle between module surface and horizontal ground. The module will obtain the maximum power output when directly facing the sunlight.

Sun Light

Module

Tilt Angle
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 accumulated water to flow away physically and avoid water mark on the glass surface which may further affect module appearance and performance.
LONGi modules connected in string should be installed with the same orientation and tilt angle. Different module orientation and tilt angle may result in different levels of solar irradiation and also power generation. 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-connected system, the tilt angle should be calculated based on the principle to maximize the yearly output power.

12

5 Mechanical Installation
5.1 Regular Requirements
· Make sure that installation method and mounting structure are solid enough to meet the expected load-bearing
requirement, which is requisite assurance from PV system installer. 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.
· Mounting structure shall be made from durable, corrosion resistant, UV-proof materials. · Modules shall be fixed on the bracket solidly. · In regions with heavy snowfall in winter, adjust the height of the mounting system so that the lower edge of the
module is not covered by snow. In addition, ensure the lower part of module is not in the shadow of plants, trees or damaged by flying sand and stone.
· 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 which is good for air circulation to achieve better performance of module. 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 minimum distance between two
adjoining modules shall be no less than 10 mm (0.39 inch).
· 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, a safety factor of 1.5 need to be considered in compliance with the local laws or regulations.
· Modules can be installed horizontally or vertically. When installing the components, be cautious not to block the drain
hole of the frame.
5.2 Monofacial assembly mechanical installation
Module and bracket system connection can be realized by mounting holes, clamps or embedded systems. Installation shall follow the demonstration and suggestions below. If installation mode is different, please consult LONGi customer service personnel and obtain approval. Otherwise, modules may be damaged and limited warranty will be invalid.
13

5.2.1 Bolts Mounting
LONGi modules come standard with 8 mounting holes matching M8 bolts (marked by the blue dashed box in the figure below, according to the location distribution hereinafter referred to as inner four holes and outer four holes); 72 type and some 66 type modules have additional 4 mounting holes matching M6 bolts (marked by the red circle in the figure below, 400mm holes for short), which are used for matching with the tracking bracket system products from manufacturers such as NEXTracker. Apply bolts to fix modules on the bracket through mounting holes on the back-side frame. See details in Figure 4.

8 installation holes (4 inner, 4 outer) Use M8 bolts

4 400mm-span installation holes Use M6 bolts

400mm

Bolt Washer Aluminum frame
Bracket Washer Spring washer Nut

Figure4 Bolt Installation of Mono-facial Modules

Recommended accessories are as below :

Accessories Bolt
Washer Spring Washer Nut

Model
M8 (full thread recommended)
2pcs, thickness 1.5mm and outside diameters=16mm
8
M8

M6 (full thread recommended)
2pcs, thickness 1.5mm and outside diameters =12-16mm
6
M6

Material Q235B/SUS304
Q235B/SUS304 Q235B/SUS304 Q235B/SUS304

Note
Accessories material selection should be based on application environment.

Suggestion :c1 M8 bolt tightening torque range: 12-16 N·m; M6 bolt tightening torque range: 8-12 N·m; c2 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 personnel);

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 that these has no shadow caused by clamps. The drain holes of module cannot be blocked by clamps. For framed PV modulethe 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 modulethe clamp must maintain an overlap of 15 mm at maximum with the module. The applied value of torque should refer to mechanical design standard and the bolt type customer is using, for example: M8: 14-18 N·m.
14

bolt
washer clamp washer
spring washer nut

laminated part

bolt

laminated part

aluminum frame

aluminum frame

bracket

bracket

Figure 5 Clamp Installation of Monofacial Module

clamp washer
washer
spring washer nut

5.2.3 Installation and Mechanical Load of Monofacial Module
Mono-facial modules can be mounted by bolts or clamps. The mounting method and maximum test load are shown as follow (The unit of distance and length in the table below is millimeter (mm), and the unit of pressure is Pascal (pa)).

Outer Four-hole bolts Mounting Mounting rails cross the long frame.

Inner Four-hole bolts Mounting Mounting rails cross the long frame.

Clamps Mounting Mounting rails cross the long frame.
clamp length 50mm

Clamps Mounting Mounting rails cross the short frame.
clamp length 50mm

Clamps are mounted at the corners of short frame. clamp length 60mm, the overlap of clamp and
frame 9mm
Figure 6 Monofacial Module Installation Annex
15

The maximum test load of framed mono-facial modules:

Installation Method
Module Type

Bolts Mounting

Mounting rails cross the long frame

Outer Fourhole

Inner Four-hole

LR4-50HPH-***M ±2400

+5400-2400

LR4-60HPH-***M ±2400

+5400-2400

LR4-60HPB-***M ±2400

+5400-2400

LR4-60HIH-***M ±2400

+5400-2400

50/54/60/66-cell Framed Mono-facial Modules

LR4-60HIB-***M ±2400

+5400-2400

LR4-66HP-***M +5400-2400 ±2400

LR4-66HPH-***M +5400-2400 ±2400

LR4-66HIH-***M +5400-2400 ±2400

LR5-54HPH-***M ±2400

+5400-2400

LR5-54HPB-***M ±2400

+5400-2400

LR5-54HIH-***M ±2400

+5400-2400

LR5-54HIB-***M ±2400

+5400-2400

LR5-54HNB-***M ±2400

+5400-2400

LR5-54HTH-***M ±2400

+5400-2400

LR5-54HTB-***M ±2400

+5400-2400

LR5-66HPH-***M +5400-2400 ±2400

LR5-66HIH-***M +5400-2400 -2400

Clamps Mounting

Mounting rails cross the long frame

1/4L-50 D 1/4L+50
+5400-2400

250 D 350
/

300 D 450
/

400 D 500
/

Mounting rails cross the short
frame 150 E 250

Clamps are mounted at the corners
of short frame

±2400

/

+5400-2400

/

/

/

±2400

/

+5400-2400

/

/

/

±2400

/

+5400-2400

/

/

/

±2400

/

+5400-2400

/

/

/

±2400

/

/

/

+5400-2400

/

±2400

/

/

/

+5400-2400

/

±2400

/

/

/

+5400-2400

/

±2400

/

/

+5400-2400 /

/

±2400

+2400/-1800

/

+5400-2400 /

/

±2400

+2400/-1800

/

+5400-2400 /

/

±2400

+2400/-1800

/

+5400-2400 /

/

±2400

+2400/-1800

/

+5400-2400 /

/

±2400

+2400/-1800

/

+5400-2400 /

/

±2400

+2400/-1800

/

+5400-2400 /

/

±2400

+2400/-1800

/

+5400-2400

/

±1800

±1600

/

+5400-2400

/

±1800

±1600

LR4-72HPH-***M +5400-2400 ±2400

/

/

+5400-2400

/

/

/

LR4-72HIH-***M +5400-2400 ±2400

/

/

+5400-2400

/

/

/

LR5-72HPH-***M +5400-2400 ±2400

/

/

/

+5400-2400 /

/

LR5-72HIH-***M +5400-2400 ±2400

/

/

/

+5400-2400 /

/

LR5-72HTH-***M +5400-2400 ±2400

/

/

/

+5400-2400 /

/

72-cell Framed Mono-facial Module

16

LONGi Mono-facial modules can be matched with the mainstream mounting systems in the industry. The test load of module with typical mounting systems are as follows. As for other special mounting systems which are not included in the table below, please consult LONGi customer service personnel.

Module Type
LR4-72HPH-M LR4-72HIH-M
LR5-66HPH-M LR5-66HIH-M LR5-72HPH-M LR5-72HIH-M LR5-72HTH-***M

Compatible Support Brackets

Mounting Hardware

Short Rail V2.3 4×bobtails (M6 head O.D. 16.8 mm) (400mm holes position

NEXTracker NX Horizon 1P

Short Rail V2.4 4×bobtails (M6 head O.D. 16.8 mm) (400mm holes position

ATI DuraTrack TM HZ Tracking System 1P
Arctech Horizontal Single-axis Tracker SkySmart2 2P Soltec SF7 Single-Axis Tracker 2P NEXTracker NX Horizon 1P

Short Rail V2.4 + Reinforcement 4×bobtails (M6 head O.D. 16.8 mm) (400mm holes position
Hi-rise 300mm Clamp Drawing No: 20822
Hi-rise 400mm Clamp Drawing No: 20834
600mm Clamp Drawing No: 20715
3214mm rail + 900mm diagonal brace M8 bolt+M8 plain washer(O.D.=16mm) Drawing No: SZ0598640 + ZC9001740 990mm holes position
2530mm rail M6 bolt+M6 plain washer (O.D.=18mm) Drawing No: SF7-MR-06-091 Rev.D00 400 + 1300mm holes position
Short RailV2.4 + Reinforcement 4×bobtails (M6 head O.D. 16.8 mm) (400mm holes position

NEXTracker NX Horizon 1P

Short RailV2.4 + Reinforcement 4×bobtails (M6 head O.D. 16.8 mm) (400mm holes position

Test Load (pa) ±2400 +1200-2400 ±2400 ±1500 ±1600 ±2800 ±2000
+1200-1800
±2400
±1800

æ NEXTracker Short Rail V2.3 is at the stage of phase-out. LONGi recommends that the maximum torque value of bolts used at ATI Hi-rise 300mm should be 19 N·m. The load information in this section comes from the sandbag pressure test results of LONGi or third-party certificate authorities. During the test, sandbags with the weight of 10Kg per each are used to evenly spread onto module surface.

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
LONGi modules come standard with 8 mounting holes matching M8 bolts (marked by the blue dashed box in the figure below, according to the location distribution hereinafter referred to as inner four holes and outer four holes); 72 type and some 66 type modules have additional 4 mounting holes matching M6 bolts (marked by the red circle in the figure below, 400mm holes for short), which are used for matching tracking bracket system products from manufacturers such as NEXTracker. Apply bolts to fix modules on the bracket through mounting holes on the back frame. See details in Figure 7. A indicates the overlap range between module frame and bracket.

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8 installation holes (4 inner, 4 outer) Use M8 bolts

4 400mm-span installation holes Use M6 bolts

400mm
Figure 7 Bolt Installation of Bifacial Module

Recommended accessories are as below :

Accessories Bolt
Washer Spring Washer Nut

Model
M8 (full thread recommended)
2pcs, thickness1.5mm and outside diameters=16mm
8
M8

M6 (full thread recommended)
2pcs, thickness1.5mm and outside diameters =12-16mm
6
M6

Material Q235B/SUS304
Q235B/SUS304 Q235B/SUS304 Q235B/SUS304

Note
Accessories material selection should be based on application environment.

Suggestion :c1M8 bolt tightening torque range: 12-16 N·m; M6 bolt tightening torque range: 8-12 N·m; c2When 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 personnel);

5.3.2 Clamps Installation
Special clamps are used to install the modules, as shown in Figure 5. 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 from being damaged. Make sure that these has no shadow caused by clamps. The drain holes of module cannot be blocked by clamps. For framed PV module, the clamp must overlap the module frame at least 8 mm (0.32 inch) but no more than 11 mm (0.43 inch). The cross section of clamp can be adjusted if the
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module is securely fastened. For frameless PV module, the clamp must overlap the module frame at maximum 15 mm (0.59 inch). The applied value of torque should refer to mechanical design standard and the bolt type customer is using, for example: M8: 14-18 N·m.

Bolt Upper side clamp Lower side clamp
Bracket

Framed PV Module
EPDM
Frameless module
EPDM
Frameless PV Module Figure 8 Clamp Installation of Bifacial Module

Bolt Upper side clamp
Lower side clamp Bracket

5.3.3 Installation and Mechanical Load of Bifacial Module
Bifacial modules can be mounted by bolts or clamps. The mounting method and maximum test load are shown as follow. (The unit of distance and length in the table below is millimeter (mm), and the unit of pressure is Pascal (pa)).
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Outer Four-hole bolts Mounting Mounting rails parallel the long frame.

Outer Four-hole bolts Mounting Mounting rails cross the long frame.

Inner Four-hole bolts Mounting Mounting rails parallel the long frame.

Inner Four-hole bolts Mounting Mounting rails cross the long frame.

(beam perpendicular to long sides) (clamp length40mm)

Clamps Mounting Mounting rails cross the long frame.
(clamp length40mm)

Clamps Mounting Mounting rails cross the short frame.

Clamps are mounted at the corners of short frame.

Aluminum Frame Height (H) Figure 9 Bifacial Module Installation Annex
20

The maximum test load of framed Bifacial modules :

Bolts Mounting

Clamps Mounting

Module Type

Installation

Mounting rails cross the long frame

Mounting rails cross the long frame

Method

/

clamp length50 mm

Mounting rails cross the short frame the overlap of clamp and frame 10 mm,
clamp length50 mm

Clamps are mounted at the corners of short frame
the overlap of clamp and frame 10mm, clamp length50 mm

Outer Four-hole Inner Four-hole

250D350

150E250

/

54-cell Framed Bifacial Module

LR5-54HIBD-***M

±2400

5400-2400 5400-2400

±2400

2400-1800

LR5-54HIBB-***M

±2400

5400-2400 5400-2400

±2400

2400-1800

LR5-54HABD-M LR5-54HABB-M

±2400 ±2400

5400-2400 5400-2400

5400-2400 5400-2400

±2400 ±2400

2400-1800 2400-1800

Module Type

Bolts Mounting

Clamps Mounting

Installation Mounting rails

cross the long

Method

frame

Mounting rails parallel the long frame.

Mounting rails cross the long frame.

Mounting rails parallel the long frame.

Outer Four-hole Outer Four-hole

Inner Four-hole

350 D 450

400 D 500

350 D 450

400 D 500

1/4L-50 D 1/4L+50

LR4-60HBD-***M30H /

±2400

5400-2400 /

/

/

/

5400-2400

60/66-cell Framed Bifacial Module 72-cell Framed Bifacial Module

LR4-60HIBD-M LR5-66HBD-M

/

±2400

5400-2400 /

/

5400-2400 3600-2400

±2400

5400-2400 /

/

/

3600-2400 /

5400-2400 /

LR5-66HIBD-***M

5400-2400 3600-2400

±2400

LR4-72HBD-***M35H /

5400-2400

LR4-72HIBD-***M

/

5400-2400

LR5-72HBD-***M

5400-2400 3600-2400

LR5-72HIBD-***M

5400-2400 3600-2400

LR5-72HND-M LR5-72HTD-M

5400-2400 3600-2400 5400-2400 3600-2400

±2400 ±2400 ±2400 ±2400 ±2400 ±2400

5400-2400 /

3600-2400 /

/

/

/

/

/

5400-2400

/

/

/

/

5400-2400

/

5400-2400 /

3600-2400 /

/

5400-2400 /

3600-2400 /

/

5400-2400 /

3600-2400 /

/

5400-2400 /

3600-2400 /

LONGi bifacial modules can be matched with the mainstream bracket systems in the industry. The matching test load is as follows (for other bracket systems matching information which are not specified or included in the table below, please consult LONGi customer service personnel).

21

Module Type

Compatible Support Brackets
NEXTracker NX Horizon1P

LR4-72HBD-M LR4-72HIBD-M

ATI DuraTrack TM HZ Tracking System1P

LR5-66HBD-M LR5-66HIBD-M

Arctech Horizontal Single-axis Tracker SkySmart2 2P Soltec SF7 Single-Axis Tracker 2P NEXTracker NX Horizon1P

NEXTracker NX Horizon1P

ATI DuraTrack TM HZ Tracking System1P

LR5-72HBD-M LR5-72HIBD-M LR5-72HND-M LR5-72HTD-M

Arctech Horizontal Single-axis Tracker Skyline1P

PV Hardware Omega-400 1P

Arctech Horizontal Single-axis TrackerSkysmart2 2P Soltec SF7 Single-Axis Tracker 2P

Mounting Hardware
Short Rail V2.4 4×bobtails (M6 head O.D. 16.8 mm) (400mm holes position
Hi-rise 300mm Clamp Drawing No: 20822
Hi-rise 400mm Clamp Drawing No: 20834
600mm Clamp + Clamp Ear 80mm Drawing No: 20908
600mm Clamp Drawing No: 20715
850mm Clamp + Clamp Ear 80mm Drawing No: 20904
3214mm rail + 900mm diagonal brace M8 bolt+M8 plain washer(O.D.=16mm) Drawing No: SZ0598640 + ZC9001740 990mm holes position
2530mm rail M6 bolt+M6 plain washer (O.D.=18mm) Drawing No: SF7-MR-06-091 Rev.D00 400 + 1300mm holes position
Short Rail V2.4 4×bobtails (M6 head O.D. 16.8 mm) (400mm holes position
Short RailV2.4 4×bobtails (M6 head O.D. 16.8 mm) (400mm holes position
Short RailV2.4 + 990m Supplement Rail 8× bobtails (M6 head O.D. 16.8 mm) 400+990mm holes position
Hi-rise 300mm Clamp Drawing No: 20822
Hi-rise 400mm Clamp Drawing No: 20834
600mm Clamp + Clamp Ear 80mm Drawing No: 20908
850mm Clamp + Clamp Ear 80mm Drawing No: 20904
1400mm Rail Drawing No: 20916
450mm Rail M6 bolt+M6 plain washer (O.D.=18mm) Drawing No: 300010141 400mm holes position
1040mm Rail M8 bolt+M8 plain washer(O.D.=16mm) Drawing No: 300010142 990mm holes position
1450mm Rail M8 bolt+M8 plain washer(O.D.=16mm) Drawing No: 300010143 1400mm holes position
428mm Rail M6 bolts+M6 washer(O.D.=18mm) Drawing No: MC_PR_Omega60x1_Oct_M6S355 ZM310_400 400mm holes position
2786mm Rail 400mm holes: M6 bolt+M6 plain washer (O.D.=18mm) 990mm holes: M8 bolt+M8 plain washer (O.D.=16mm) Drawing No: SZ0598240 400+990mm holes position
3376mm Rail + 900 M8 bolt+M8 plain washer(O.D.=16mm) Drawing No: SZ0598340+ZC9001740 990mm holes position
3786mm Rail + 900 M8 bolt+M8 plain washer(O.D.=16mm) Drawing No: SZ0598440+SZ0598440 1400mm holes position
2832mm rail M6 bolt+M6 plain washer (O.D.=18mm) Drawing No: SF7-MR-06-064 Rev.P00 400 + 1400mm holes position

Test Load (pa)
±2400 ±1500 ±1500 ±2400 ±2800 ±3000 ±2400
±1800 ±2400 ±2100 ±2400 ±1200 ±1200 ±1900 ±2400 ±3600 ±1800
±2400
±3600
±1800
+1800/-1600
+2200/-2000
+2600/-2200
±1800

æ The modules are in upgrade, please consult customer service of LONGi solar before choosing trackers. LONGi recommends that the maximum torque value of bolts used at ATI Hi-rise 300mm should be 19 N·m. The load information in this section comes from the sandbag pressure test results of LONGi or third-party certificate authorities. During the test, it is recommended that 10kg/sandbag is used to evenly spread the surface of the module.

22

6 Electrical installation
6.1 Electrical Performance
The electrical characteristics are within ±3% of the indicated values of Isc, Voc and Pmax under STC (1000 W/m2 Irradiance, a cell temperature of 25¥ and an AM1.5 spectrum). When modules are in series connection, the string voltage is sum of every individual module in one string. When modules are in parallel connection, the current is sum of the individual module as shown in below figure 10. Modules with different electric performance models can not be connected in one string.

String Connection
Blocking Diode

Parallel Connection

Over Current Protection Device

Connector

Figure 10 Series Connection and Parallel Connection Circuit Diagram

The maximum allowed quantity of modules in string connection shall be calculated according to relative regulations. The open circuit voltage value under the expected lowest temperature shall not exceed the maximum system voltage value allowed by modules and other values required by DC electric parts. (LONGi modules maximum system voltage is DC1000V/DC1500V—actually system voltage is designed based on the selected module and inverter model.) The correction value of VOC can be calculated by the following formula. CVoc=1-Voc×(25-T) T: The expected lowest temperature of the installation site. : VOC temperature coefficient (% /¥) (Refer to module datasheet for further detail) If there has reverse current exceeding the maximum fuse current flowing through the module, use overcurrent protection device with the same specifications to protect the module. If quantity of parallel connection is more than 2, there must be an overcurrent protection device on each string of module.

6.2

6.2 Cables and Wiring
PV Module’s junction boxes with the IP67 protective level, can provide the safety protection for cable and wiring connection, also for contact protection of non-insulating electric parts. Each module has two individual wires connecting the junction box, one is negative pole and the other is positive pole. Two modules can be in series connection by inserting the positive pole at one end of wire of one module into the negative pole of the adjoining module.
23

According to local fire protection, building and electrical regulation, apply proper cable and connector; ensure the electrical and mechanical property of the cables (the cables should be put in a catheter with anti-UV aging properties, and if exposed to air, the cable itself should have anti-UV aging capability). The installer can only use single-wire cable, 4mm2 (12 AWG), 90 ¥ , with proper insulation capability to withstand the maximum open circuit voltage (such as EN50618 approval). Need to select appropriate wire specifications to reduce voltage drop. LONGi requires that all wiring and electrical connections comply with the appropriate National Electrical Codes. When cables are fixed on the bracket, avoid mechanical damaging cables or modules. Do not press cables by force. Adopt UV resistant cable ties and clamps to fix cables on the bracket. Though cables are UV resistant and water proof, it is still necessary to prevent cables from direct sun light and water immersion. The minimum allowed bending radius of cables should be 43mm. (1.69 inch)
6.3 Connector
Please keep connectors clean and dry. Make sure connector caps are fastened before connection. Do not connect connectors under improper conditions of damp, dirty or other exceptional situations. Avoid connectors from direct sun light and water immersion or falling onto ground or roof. Incorrect connection may lead to electric arc and electric shock. Please make sure that all electric connection is reliable. Make sure all connectors are fully locked. Only connectors as the compatible model from same vendor can be mated together. Any doubt, please consult LONGi customer service personnel).
6.4 Bypass diode
LONGi solar module junction box contains bypass diode which is in parallel connection with the cell string. If hot spot occurred, the diode will come into operation to stop the main current from flowing through the hot spot cells in order to prevent module over-heated and performance loss. Notice, bypass diode is not the overcurrent protection device. If the diode is definite or suspected to be defective, the installer or system maintenance supplier shall contact LONGi. Please do not try to open the module junction box on your own.
6.5 PID Protection and Inverter Compatibility PV modules may appear Potential Induced Degradation (PID) under high humidity, high temperature and high
voltage condition. Modules may appear Potential Induced Degradation (PID) under the conditions below: PV modules install under hot and humid weather condition. PV modules installation site is under long-term humid environment such as water floating application. To reduce the risk of PID, on the modules DC connection site, it is recommended to connect the negative to ground. The PID protection measures on system level are recommended as follow For isolated PV inverter, the negative of the PV modules DC connection side can be directly grounded. For non-isolated PV inverter, isolated transformer is needed to be equipped before applying virtual grounding
method for inverter.
24

7 Grounding

In design of modules, the anodized corrosion resistant aluminum alloy frame is applied for rigidity support. For safety

consideration and to protect modules from lightning and electrostatic damage, the module frame must be grounded.

The grounding device must be in full contact with inner side of the aluminum alloy and penetrate surface oxide film of the

frame.

Do not drill additional grounding holes on module frame.

The grounding conductor or wire may be copper, copper alloy, or any other material acceptable for application as an

electrical conductor per respective National Electrical Codes. The grounding conductor must then make a connection to

ground with a suitable ground electrode.

There have grounding holes with the diameter of Ø4.2 mm at the edge location of module’s back-side frame. The

grounding hole on the frame is marked with typical grounding symbol (

) according to IEC 61730-1 standard, which

can only be used for grounding, not for module installation.

Grounding between modules shall be confirmed by qualified electricians and grounding devices shall be manufactured

by qualified electric manufacturer. The copper core wire used for the grounding clamp is recommended to be 12 AWG.

And copper wires cannot be pressed during installation in case of damaging.

The following is one of the recommended grounding methods of LONGi modules: Align grounding clamp to the frame mounting hole. Use grounding bolt to go through the grounding clamp and frame. Put the tooth side of the washer on the other side and fasten the nuts. Put grounding wires through the grounding clamp and grounding wire material and dimension shall meet
requirements in local national and regional law and regulations. Fasten bolts of grounding wires and then installation is completed.
25

Frame
Grounding Wire

Fasten nuts
Tooth washer Fixing end of grounding clamp Grounding bolt
Grounding wire fastening bolt

Figure 10 Bolt Grounding Method of PV Module

Mounting holes on modules that are not occupied can be used for installing grounding devices. The third party grounding device can be used for grounding of LONGi modules but such grounding method shall be proved to be reliable. Grounding device shall be operated in line with stipulations of the manufacturer.

8 Operation and maintenance
It is the users’ responsibility to carry out regular inspection and maintenance for modules, especially during the period of limited warranty. To inform the LONGi customer service personnel within two weeks when modules are found broken or other significant abnormality.
8.1 Cleaning
Accumulated contaminants on module surface glass will reduce the power output and lead to local hot spot, such as dust, industrial wasted water and birds’ droppings. The severity of influence is determined by transparency of wastes. Small amounts of dust will affect the intensity and evenness of received solar irradiation but are not dangerous and power will not be reduced remarkably generally.

26

During operation of modules, there shall be no environmental factors to shade modules fully or partially. These environment factors including other modules, module mounting system, birds dwelling, dust, soil or plants. These will significantly reduce output power. LONGi suggests that the module surface should not be shadowed in any case. Frequency of cleaning depends on dirt accumulation speed. In normal situations, rainwater will clean the module surface and reduce the cleaning frequency. It is suggested to use sponge dipped with clean water or soft cloth to wipe the glass surface. Do not use acid and alkaline detergents to clean modules. Do not use tool with rough surface to clean in any case. In order to avoid potential risk of electrical shock or burn, LONGi suggests cleaning the modules during early morning or evening with low irradiance and low modules temperature especially for the hot regions. In order to avoid potential risk of electrical shock, do not try to clean the modules with glass damage or expose wires.
8.2 Module Appearance Inspection
Check module cosmetic defects with naked eyes , especially: Module glass cracks. Corrosion at welding parts of the cell main grid (caused by moisture into the module due to damage of sealing
materials during installation or transportation). Check whether there are traces of burning mark on the module back sheet. Check PV modules if any signs of aging including rodent damage, climate aging, connectors tightness, corrosion
and grounding condition. Check if any sharp objects in contact with PV modules’ surface Check if any obstacles shading the PV modules Check if any loose or damage screws between the modules and mounting system. If so, adjust and fix in time.
8.3 Inspection of Connectors and Cables
It is suggested to carry out the following preventive inspection twice a year: Check the tightness of the connectors and cables. Check if any crack or gap of silicone nearby the
junction box.
9 Release and execution
This manual is implemented and managed by product management department of LONGi, who reserves the right to modify and revise this manual in any time without prior notice.
27

LONGi Solar Technology Co, Ltd.
No.8369 Shangyuan Road, Xi’an Economic & Technological Development Zone
www.longi.com

References

• The World’s Leading Supplier of Solar PV Solutions-LONGi

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