Tongwei SOLAR TWMNG-72HD PV Module Unveils Its Full Range Installation Guide

Tongwei SOLAR TWMNG-72HD PV Module Unveils Its Full Range

Types of PV Module This installation Manual applies to

Monofacial Module

| With ½ cut of M mono c-Si cell| 10 With ½ cut of G12 mono c-Si cell| With ½ cut of G11 mono c-Si cell| L       With ½ cut of G12R mono c-Si cell
---|---|---|---|---
TWMPD-78HS| TWMPF-66HS| TWMNG-72HS| TWMNH-66HS
TWMPD-72HS| TWMPF-60HS| |
TWMPD-66HS| TWMPF-54HS| |
TWMPD-60HS| TWMPF-55HS| |
TWMPD-54HS| TWMPF-50HS| |
TWMPD-54HB
TWMND-78HS
TWMND-72HS
TWMND-66HS
TWMND-60HS
TWMND-54HS

Bifacial Module

| TWMPD-78HD| TWMPF-66HD| TWMNG-72HD| TWMNH-66HD
TWMPD-72HD| TWMPF-60HD| TWMNG-54HD| TWMNH-48HD
TWMPD-66HD| TWMPF-55HD| TWMNG-54HC| TWMNH-48HC
TWMPD-60HD| TWMPF-54HD| |
TWMND-78HD| TWMPF-50HD| |
TWMND-72HD| TWMNF-66HD| |
TWMND-66HD| TWMHF-66HD| |
TWMND-60HD

• Meaning of crossed-out wheeled dustbin: Do not dispose of electrical appliances as unsorted municipal waste, use separate collection facilities. Contact your local government for information regarding the collection systems available.
• If electrical appliances are disposed of in landfills or dumps, hazardous substances can leak into the groundwater and get into the food chain, damaging your health and well-being. When replacing old appliances with new ones, the retailer is legally obligated to take back your old appliance for disposal at least free of charge.

PURPOSE OF THIS MANUAL

• This manual applies exclusively to the solar photovoltaic module (hereinafter referred to as Module) of TW Solar Energy Co., Ltd. (here in after referred to as TW). The contents of this manual involve the installation methods, operation safety and maintenance information of TW’s Modules.
• Modules must be installed by professionals. Please read this manual carefully before installation. The installers must follow all the rules in this manual strictly as well as local requirements and regulations by law or authorized organizations.
• Before installing, the installer must be familiar with their mechanical and electrical requirements. Please keep this manual in a safe place for future reference (care and maintenance) and in case of sale or disposal of the Modules.

DISCLAIMER

• TW shall not be responsible for any loss arising from the installation, operation, use, or maintenance of the Modules which is not complying with the guidance of this manual, including breakdown or damage of the Modules or any other expenses incurred.
• Any customer shall not get any patent or authorization of the patent when using the Modules, expressed or implied. Any infringement of patents or other rights of the third party, which may result from the use of the Module, is not within the responsibility scope of TW. The information in this manual is based on TW’s knowledge and experience and is believed to be reliable, but such information including product specification (without limitation) and relevant suggestions does not constitute a warranty, expressed or implied.
• TW reserves the right to change the manual, the Modules, the specifications, or any other information of the Modules without prior notice.

SAFETY & TRANSPORT

General Detailed Rules

• Keep all the Modules and electrical connectors clean and dry before installation.
• Use both hands to carry Modules. Do not overlap Modules.
• Be cautious when carrying Modules. Slip-proof gloves are necessary.
• Use supportive disassembling tools when unpacking.
• The application level of the TW module is Class A, which can be used in systems operating at greater than 50V DC or 240W, where general contact access is anticipated.

Module Carry and Installation Instruction

• Both hands when handling Modules
• Ensure Modules are fixed properly
• Do not use sharp objects with Modules
• Do not pull the wiring cables or junction box
• Do not stamp on Modules
• Do not touch Modules with bare or dirty hands
• Do not pile up Modules on uneven ground
• Do not drop or throw Modules

Electrical Performance Safety

• PV modules can produce DC under sunlight. Any contact of exposed metal at the 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 PV modules can only be stopped when they are kept from sunlight or covered by the hard board or UV-proof materials or when the angle of the modules facing the sun is placed on smooth and flat surfaces.
• To avoid electric arc or electric shock hazards, please do not break down the electric connection in loaded conditions. Incorrect connections will also lead to an 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 connections by whatever means.
• Snow, water, or other reflective mediums in surrounding environments that intensify light re-flection will increase output current and power. Module voltage and power will increase under low-temperature conditions.
• If module glass or other sealing materials are damaged, please wear personal protective equipment and then isolate modules from the circuit.
• Work only under dry conditions, and use only dry tools. Do not operate when modules are wet unless you wear personal protective equipment. Please follow the cleaning requirements in this manual when cleaning modules.
• Installation must be carried out under the guidance of a qualified electrician.
• No matter how weather conditions are, personnel entering the power station shall wear safety helmets, insulating gloves, and insulating shoes correctly, taking safety protection measures.

Description of Package Signs

Before the operation, it is necessary to read carefully the unpacking instructions and outer packing box instructions and carry out the operation as instructed.

1. DO NOT expose the module to rain or moisture.
2. The Modules in the carton box are fragile. Handle with care.
3. The package shall never be upside down during transportation.
4. It is prohibited to tramp on the packing box and module.
5. During the stacking of the Modules, the outer packing box can be stacked not exceeding the maximum layer allowed. (n=2 means it is allowed to stack for at most two layers.)
6. One module shall be handled by two people together.

Unloading, Transportation, and Storage

• When the Modules are delivered to the project site, the freight car shall be ready in the flat, even an open area for parking and unloading.
• Forklift unloading: Choose the appropriate carrying forklift according to the commodity weight, unload the Modules from the freight car, and place them on flat ground.
• Unloading with a crane: Affix the lifting belt into the wood supporting frame buckle (Fig. 1, 2). It is allowed only to lift one pallet at a time. Before lifting, it is necessary to confirm whether the pallet and paper box are damaged and ensure that the lifting rope is robust and firm. When being lifted close to the ground, the paper box will be gently placed in a relatively flat position on the project site by two people, one on each side.
• It is prohibited to stack the Modules on the project site.
• During the transportation at the project site, the Modules shall not be stacked, but only allow for one layer in transportation.
• Storage in the project site warehouse: Storage environment requirements: Humidity<85%, temperature -20 ~+50℃; Modules statically stacked for ≤2 layers.
• Temporary storage at the project site: The Modules shall be stored in a dry, well-ventilated place. They shall not be stacked but shall be covered with waterproof cloth to prevent dampness in the Modules.

Unpacking description

• In the outdoor unpacking process, it is prohibited to operate in rainy conditions;
• If there is wind in the field, special attention shall be paid. Particularly in the event of heavy wind, it is recommended not to handle the module, and it is necessary to properly secure the unpacked Modules;
• The working surface shall be such that the packing box can be placed in a stable, level position, avoiding being overturned;
• During the unpacking, it is necessary to wear protective gloves, and avoid scratching the hands and leaving fingerprints on the glass;
• In the case of an operation not according to the requirements or in the case of an unskillful operation, it will result in the fall-off of the protective corner in small amounts, which will be normal. The effect of the protective corner is to reduce damage due to external force during transport, and the fall-off of the protective corner will not influence the reliability of the Modules;
• Before unpacking, it is necessary to carefully check the product information on the carton box, and carefully read the unpacking instructions;
• Every module shall be carried by two people. When carrying the module by two people, it is prohibited to pull the junction box.

MECHANICAL INSTALLATION

Location Selection

• Select suitable places to install Modules.
• Install Modules at places with sufficient sunlight and without shade at any time. If a module is shaded or even partially shaded, it will result in lower power output. A permanent or regular shade will cause module damage, which will result in the invalidity of the product’s limited warranty.
• Do not store, install,l or use Modules at the places where combustible gas is easily generated or gathered.
• Modules can be installed on land 50 to 500m away from the coastline. However, the connectors must be well protected or a dust-proof plug must be added when installing Modules within this distance. Connect the dust-proof plug immediately after removing it, and take other anti-rust measures to prevent the parts from rusting.
• Modules in the same string should be installed at the same angle. Modules installed at different angles will receive different irradiation, which will cause current differences. As a result, it will decrease the operation efficiency of the system.

Installation requirements

• Ensure the module installation method and support system are sufficiently robust, so that the Modules can undertake the preset loading conditions, the support installer or supplier shall provide the necessary guarantees and other related certifications. The installation support system shall pass the inspection and test by the third-party test institution with the static mechanic analysis capability, and use the local national or international standards, such as DIN1055 or equivalent.
• The support structure shall be made of durable, corrosion-resistant, and ultraviolet-resistant materials.
• The module shall be firmly mounted on the support.
• Choose the proper installation height for the photovoltaic support system, and ensure the lowest part of the module is high enough, to avoid being shaded by plants or being damaged by the flying sand. Or being covered by snow for a long time in winter.
• When the module is installed on the roof or the building, it is necessary to ensure that the roof structure is fixed firmly and will not be damaged by heavy wind or heavy snow, and the back of the module shall be well-ventilated to facilitate the cooling of the module.
• Due to the thermal expansion of physical properties of materials, the Modules are asymmetric structures, which will produce a certain degree of warping deformation at different temperatures, which does not affect the installation, use, and reliability of the Modules. The minimum distance between two Modules should not be less than 10 mm.
• Ensure that the module backside will not contact the support or architectural structure even if there is the module surface is under external pressure.
• It is required to observe the instruction guide and safety rules attached to ontohe support.
• It is not allowed to drill the hole in the glass surface or frame of the module. Otherwise, the guarantee will be invalidated.
• When installing the Modules on the roof, it is necessary to guarantee the roof structure is suitable for the module installation. And the installed modules should not be beyond the roof zone. Additionally, the roof area where it is penetrated by module installation shall be properly sealed to prevent the roof from water leakage.
• When the module is installed on the supporting column, it is necessary to ensure the supporting column and module installation structure isareapable of withstanding the expected local wind.

Installation Method

Clamping system

Note: The length of the clamp≥50mm.

Table 2 Installation method and load capacity

Classification

| Installation method| Installation method A| Installation method B| Installation method C| Installation method D
---|---|---|---|---|---

Modules model

| Height of the frame (mm)| Mounting clamp position K

(mm)

| ****

Test load: front/back, (Pa)

| Mounting clamp position K

(mm)

| ****

Test load: front/back, (Pa)

| Mounting clamp position K

(mm)

| ****

Test load: front/back, (Pa)

| Mounting clamp position K

(mm)

| ****

Test load: front/back, (Pa)

Monofacial Module

| TWMPD-54HS TWMPD-54HB TWMND-54HS

TWMND-54HB

| ****

B30

| ****

A/4±50

| ****

5400/2400

| 200 ～

300

| ****

3600/2400

| 100 ～

240

| ****

±1600

| 100 ～

240

| ****

±1600

TWMPD-60HS TWMND-60HS| B35| 5400/2400| 300 ～

400

| 3600/2400| 100 ～

240

| ±1600| 100 ～

240

| ±1600

TWMPD-66HS TWMND-66HS

| ****

B35

| ****

5400/2400

| ****

—

| ****

—

| ****

0 ～ B/4

| ±1200

(special clamp)

| 150 ～

240

| ****

±1600

TWMPD-72HS TWMND-72HS

| B30| 440| 5400/2400| —| —| —| —| —| —

B35

| ****

A/4±50

| ****

5400/2400

| ****

—

| ****

—

| ****

0 ～ B/4

| ±1200

(special clamp)

| ****

—

| ****

—

TWMPD-78HS TWMND-78HS| B35| 570~630| 5400/2400| —| —| —| —| —| —
TWMPF-50HS| B35| 360~420| 5400/2400| —| —| —| —| —| —
TWMPF-55HS| B35| 440~540| 5400/2400| —| —| —| —| —| —
TWMPF-54HS| B35| 360~430| 5400/2400| —| —| —| —| —| —
TWMPF-60HS| B35| 360~420| 5400/2400| 365~435| 3600/2400| 45~485| ±1000| —| —

TWMPF-66HS

| ****

B35

| ****

440~540

| 5400/2400

(special clamp)

| ****

—

| ****

—

| ****

—

| ****

—

| ****

—

| ****

—

TWMNG-72HS| B35| A/4±50| 5400/2400| A/4±50| 5400/2400| | | |
TWMNH-66HS| B35| 5400/2400| 5400/2400| | | |

Bifacial Module

| TWMPD-60HD TWMND-60HD| B30| ****

A/4±50

| 5400/2400| ****

A/4±50

| 3600/2400| —| —| —| —
TWMPD-66HD TWMND-66HD| B30| 5400/2400| 3600/2400| —| —| —| —
TWMPD-72HD TWMND-72HD| B30| 5400/2400| 3600/2400| —| —| —| —
B35| 5400/2400| 3600/2400| | —| —| —
TWMPD-78HD TWMND-78HD| B30| 5400/2400| —| —| —| —| —
B35| 5400/2400| —| —| —| —| —
TWMPF-50HD| B35| 5400/2400| —| —| —| —| —| —
TWMPF-55HD| B35| 5400/2400| 440~540| 3600/2400| —| —| —| —
TWMPF-54HD| B35| 5400/2400| —| —| —| —| —| —
TWMPF-60HD TWMHF-60HD| B35| 5400/2400| 360~420| 3600/2400| —| —| —| —
TWMPF-66HD TWMNF-66HD

TWMHF-66HD

| B35| ****

5400/2400

| ****

440~540

| ****

3600/2400

| ****

—

| ****

—

| ****

—

| ****

—

B33
TWMNG-54HC TWMNG-54HD| B30| 5400/2400| —| —| Four corners| ±1200| 100~240| ±1600
TWMNG-72HD| B30| 5400/2400| A/4±50| 3600/2400| —| —| —| —
TWMNH-48HC TWMNH-48HD| B30| 5400/2400| —| —| Four corners| ±1200| 100~240| ±1600
TWMNH-66HD| B30| 5400/2400| A/4±50| 3600/2400| —| —| —| —

Note: Test load = γm(safety factors) × design load, some installation methods require a special clamp, please consult the technical support department of TW for a special clamp structure shape.

Installation with the mounting hole

Mounting dimension and load capacity

Classification

| ****

Modules model

| Height of the frame (mm)| The mounting clamp position M(mm)| The mounting clamp position N(mm)| Installation Method E Test load: front/back （ Pa ）| Installation Method F Test load: front/back

﹙ Pa ）

---|---|---|---|---|---|---

Monofacial Module

| TWMPD-54HS TWMPD-54HB TWMND-54HS

TWMND-54HB

| ****

B30

| ****

990

| ****

1085

| ****

5400/2400

| ****

—

TWMPD-60HS TWMND-60HS| B35| 990| 1085| ±2400| —
1400| 1085| 5400/2400| —
TWMPD-66HS TWMND-66HS| B35| 990| 1085| ±2400| —
1400| 1085| 5400/2400| —
TWMPD-72HS TWMND-72HS| B30| 1400| 1096| 5400/2400| —
B35| 990| 1085| ±2400| —
1400| 1085| 5400/2400| —
TWMPD-78HS TWMND-78HS| B35| 1200| 1085| 5400/2400| —
TWMPF-50HS| B35| 1400| 1055| 5400/2400| —
TWMPF-55HS| B35| 1400| 1055| 5400/2400| 3600/2400
TWMPF-54HS| B35| 1400| 1262| 5400/2400| —
TWMPF-60HS| B35| 1400| 1262| 5400/2400| 3600/2400
TWMPF-66HS| B35| 1400| 1262| 5400/2400| 3600/2400
TWMHG-72HS| B35| 790| 1085| ±2400| ±2400
1400| 1085| 5400/2400| 5400/2400
TWMNH-66HS| B35| 790| 1085| ±2400| ±2400
1400| 1085| 5400/2400| 5400/2400

Classification

| ****

Modules model

| Height of the frame (mm)| The mounting clamp position M(mm)| The mounting clamp position N(mm)| Installation Method E Test load: front/back （ Pa ）| Installation Method F Test load: front/back

﹙ Pa ）

---|---|---|---|---|---|---

Bifacial Module

| TWMPD-60HD TWMND-60HD| B30| 1200| 1096| 5400/2400| —
1400| 1096| 5400/2400| —
TWMPD-66HD TWMND-66HD| B30| 1200| 1096| 5400/2400| ±2400
1400| 1096| 5400/2400| 3600/2400

TWMPD-72HD TWMND-72HD

| B30| 1200| 1096| 5400/2400| —
1400| 1096| 5400/2400| —
B35| 1200| 1096| 5400/2400| ±2400
1400| 1096| 5400/2400| 3600/2400
TWMPD-78HD TWMND-78HD| B30| 1200| 1096| 5400/2400| —
B35| 1200| 1096| 5400/2400| —
TWMPF-50HD| B35| 1400| 1055| 5400/2400| —
TWMPF-55HD| B35| 1400| 1055| 5400/2400| 3600/2400
TWMPF-54HD| B35| 1400| 1262| 5400/2400| —
TWMPF-60HD TWMHF-60HD| B35| 1400| 1262| 5400/2400| 3600/2400
TWMPF-66HD TWMNF-66HD

TWMHF-66HD

| B35| ****

1400

| ****

1262

| ****

5400/2400

| ****

3600/2400

B33
TWMNG-54HC TWMNG-54HD| B30| 1100| 1096| 5400/2400| —
TWMNG-72HD| B30| 790| 1096| ±2400| ±2400
1400| 1096| 5400/2400| 5400/2400
TWMNH-48HC TWMNH-48HD| B30| 1100| 1096| 5400/2400| —
TWMNH-66HD| B30| 790| 1096| ±2400| ±2400
1400| 1096| 5400/2400| 5400/2400

Note: Test load = γm(safety factors) × design load.

• The Modules may be installed and fixed with the following methods:
  • Mounting hole system: Use the corrosion-resistant bolt, for fixing with the installation support through the installation hole in the side frame of the module, as shown in Fig. 3.

Recommended bolt kits are as follows

is hot-dip galvanized or stainless steel, and the material selection is selected according to the local environment.
Washer| 2M8, thickness≥1.5mm and outside diameter≥16mm| 2M8, thickness≥1.5mm and outside diameter≥16mm
Spring Washer| 8mm| 6mm
Nut| M8| M6
Bolt tightening torque range(N.m)| 16~20| 8-12

• Clamping system: use a proper clamp, and fix the module with the installation support, as shown in Fig. 4. The clamp must maintain an overlap of 10 mm with the frame of the module (you can change the cross-section of the clamp if the module is securely installed). The applied value of torque should refer to the mechanical design standard and the bolt type the customer is using, for example: M8: 16-20 N•m.

Electrical Installation

DC power generated by the photovoltaic system can be converted into AC power and fed into the grid. Policies on connecting renewable energy systems to the grid vary from region to region. Consult the senior system designer before designing the system. Generally, the system installation shall be formally approved by the local public sector.

General Installation

• The installation structure should be compatible with a module, to avoid galvanic corrosion. Any defects caused by such corrosion will void the warranty.
• The DC-side system potential of the photovoltaic array includes the practice of floating ground, positive-pole grounding, and negative-pole grounding according to the system requirements; and different cell technologies have different adaptability. In a power-station project, particularly the module of the crystalline silicon photovoltaic cells, too large an absolute value of the negative to the ground might cause potential induced degradation (PID). Consequently, it is appropriate to use the negative grounding system so that the potential of the circuit is positive. Consult the inverter manufacturer for details.
• It is forbidden for non-professionals to open the lock nuts of the connector. Make sure that the connectors are clean, dry, and fully connected (A click sound should be heard when fully connected), otherwise, it may lead to electric arc sparks which will damage the connector or cause a fire.
• Under normal conditions, a module is likely to experience conditions that produce more current and/or voltage than reported at standard test conditions, Accordingly, the values of ISC and VOC marked on the Module should be multiplied by a factor of 1.25 when to determining component voltage ratings, current ratings, fuse sizes, and size of controls connected to the PV output.
• Completely cover the Modules with an opaque material to prevent electricity from being generated during the disassembling the conductors.
• It is not allowed to use the Modules in different models in the same solar photovoltaic system. When the Modules are connected in series, the voltage of every string shall not be higher than the maximum voltage of the system (as shown in Figure 5). Reference equation of the maximum number of the Modules in serial connection: maximum system voltage of the module/ (1.25* open-circuit voltage).
• When connected in parallel, the current output is equal to the sum of each string’s current (as shown in Figure 6). A fuse is necessary for each module string. Take reference to the local regulation. Recommended maximum parallel Modules configurations: Fuse rating/ (1.25* short-circuit current).
• Refer to the local regulations to determine the system wire size, types, and temperatures.
• The cross-section of the cables and the capacity of the connectors must be selected to suit the maximum system short circuit current (The recommended section area for a single piece of Module is 4 mm2, and the recommended rated current for the connector is greater than 20A), otherwise, the cables and connectors shall be overheated under large current. Caution: The maximal temperature of the cable is 85 ℃ while the upper limited temperature of the connector is 105℃.
• Make sure the electric components such as the connectors and inverters are off-state during the installation. To reduce lightning damage, the loop area should be kept as small as possible when laying cables. It is recommended to use fuses in each string.

PV module layout and wiring selection instructions

• At present, the PV module arrangement is more common in single vertical rows, double vertical rows, single horizontal rows, and double horizontal rows, as shown in Figure 7:
• The recommended cable length for different installation methods of each product is as follows:

Cell specifications|

Modules model

| *Modules dimensions (LengthWidth/mm)| Single/double vertical row Recommended cable length (mm)| Single/double horizontal row Recommended cable length (mm)**
---|---|---|---|---

M10

| 78| 24651134| +400/-200| ±1500
72| 22781134| +400/-200| ±1400
66| 20931134| +400/-200| ±1400
60| 19081134| +400/-200| ±1200
54| 1722*1134| +400/-200| ±1200

G12

| 66| 23841303| +400/-200| ±1400
60| 21721303| +400/-200| ±1400

G11L

| 72| 23821134| +400/-200| ±1400
54| 17621134| +400/-200| ±1200

G12R

| 66| 23821134| +400/-200| ±1400
48| 17621134| +400/-200| ±1200

Notes

1. The junction box cable length of the above components contains connectors；
2. This size is a reasonable size recommended and larger than the recommended size does not affect the installation.

GROUNDING

Grounding by cable

• The grounding bolts must be made of stainless steel and be used in the specified grounding holes. First, make the stainless steel bolt pass through the spring washer, cup washer, flat washer, and star washer, and then insert it through the grounding hole, flat washer and spring washer on the frame. Finally, tighten with a nut. Caution: The upper limited temperature of the conductor is 85 ℃ . As for the installation, refer to Figure 7.

Grounding by lugs

• All the module frames and mounting structures shall be grounded according to regional and national electricity regulations. Use recommended hardware to connect grounding cables and fasten to the Module frames.
• While using the metal structure, make sure the surface of the system has been electroplated to keep a good conducting circuit.
• Use suitable grounding conductors to connect the Module frame to the mounting structure. This can achieve proper grounding effects.
• The grounding conductor must be connected to the ground via an appropriate grounding electrode. It is recommended to use lugs to connect the grounding cables. If it is only mechanically connected to a grounded module without bolts and nuts, the mounting system should be grounded as well.
• First, peel the grounding cable to a proper length without damage to the metal core. Then insert the peeled cable into the lug, tighten the screw. As shown in Figure 8, connect the lug to the aluminum frame with stainless steel bolts and connection components.

BYPASS DIODESAND BLOCKDIODES

• In a system with two or more Modules connected in series, if part of a Module is shaded while the other part is exposed to the sun, a very high reverse current will go through the cells that have been partly or entirely covered and it will cause overheat on the cells, which may damage the Module. Using bypass diodes can protect Modules from this kind of risk. There are bypass diodes in junction boxes, which can reduce the effects of partial shadows. Do not privately disassemble the junction box to replace the diodes, even when the diodes are broken. This should be processed by the professionals.
• In a system with batteries, if the controller doesn’t have the function of backswing protection, block diodes installed between the battery and the Module can prevent the reverse current from damaging the Module.

MAINTENANCE

• Normally, the Modules do not need repair. Follow the maintenance methods below to ensure the best performance of the Modules:
  • In most conditions, normal rainwater can keep the module glass clean. Clean the glass surfaces with a wet soft sponge or cloth if necessary. Use mild non-abrasive cleaning agent to remove stubborn dirt.
  • Do not try to clean a Module with broken glass or a perforated back sheet. It will cause serious electrical shock. Take a regular inspection on grounding, mechanical, and electrical connections every 6 months. Make sure all the Module connectors are connected, clean and without damage or corrosion.
  • When disassembling the connectors, make sure all the components are working well; otherwise, the connectors shall be replaced. Damage to the connector will cause electronic leakage. The tightening torque of the nut should be 1.5 N • m – 3 N •m.
  • Use opaque material to completely cover the Modules during repair to avoid electric shock. When exposed to the sunshine, the Modules will produce high voltage. The repair work must be carried out by professionals.

Warning

• Shut down the system before any electric repair. Improper maintenance may cause electric shock or fire
• Customer Service Number ： 4000566888
• twcustomerservice01@tongwei.com
• After-sales E-mail： twcustomerservice01@tongwei.com

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