Jolywood M6 User manual

INSTALLATION
MANUAL
Jolywood N-type Mono-crystalline Double Glass Module
M6 Double-glass module（HD120N/P & HD144N/P）
All rights reserved © Jolywood (Taizhou) Solar Technology Co., Ltd

1.0
1.1
1.2
2.0
2.1
2.2
2.3
3.0
3.1
3.2
3.3
3.4
4.0
4.1
4.2
5.0
5.2.1
5.2.2
5.2.3
5.2.4
5.2.5
5.2.6
5.2.7
5.2.7.1
6.0
6.1
6.2
6.3
6.3.1
6.3.2
6.3.3
7.0
03
03
03
03
03
03
04
04
05
06
06
06
07
07
07
08
09
09
11
13
13
14
15
15
15
15
16
17
17
17
18
18
Introduction
Disclaimer
Limitation of Liability
Safety Precautions
Warning
General Safety
Operation instruction
Unload, Transportation and Storage
Marks on Outer Packaging
Unloading Instructions
Secondary Transportation and Precautions
Storge
Unpacking Instruction
Unpacking Safety Instruction
Unpacking Steps
Installation
Installation Safety
Mechanical installation and precautions
Framed Bifacial Double-Glass Modules (installation with clamps)
Grounding
Electrical installation
Wiring
Fuse
Maintenance for PV Modules
Module Visual Inspection and Replacement
Connector and Cable Inspection
Cleaning
Water quality requirements
Module Inspection after Cleaning
Troubleshooting
Technical Issues or Claims
Framed Bifacial Double-Glass Modules (installation with bolts)
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Contents
2
Revision Date 2022/6/10
Version: TZ-MP-068-2022-V2
Jolywood (Taizhou) Solar Technology Co.,Ltd.
Kaiyang Rd., Jiangyan EconomicDevelopment zone, Taizhou City, Jiangsu Province, P. R. Chinawww.jolywood.cn[email protected]
[phone]
Installation Manual - Jolywood N-type Mono-crystalline Double Glass Module

3
1.0
Introduction
1.1
Declaration
1.2
Limitation of Liability
2 Safety precautions
2.1 Warning
2.2 General Safety
2.2.1
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Installation Manual - Jolywood N-type Mono-crystalline Double Glass Module
This manual contains relevant information about
the installation methods and safe operation of
photovoltaic modules (hereinafter referred to as
"modules") of Jolywood Solar Technology Co., Ltd
(hereinafter referred to as "Jolywood"). Now the
standard modules JW-HD120 series(module size
1756*1039*30mm、1773*1046*30mm)and
JW-HD144(module size 2095*1039*30mm) series
are included. the manual would be updated when
new module introduced in the future. Failure to
follow these safety guidelines may result in
personal injury or death or property damage.
The installer must read and understand this guide
before installation. Any question, please contact
our customer service department or our local
representative for more detailed information. The
installer must follow all safety precautions in this
guide, local requirements,regulations of laws or
authorized agencies requirements. Before
installing a solar photovoltaic system, the installer
should be familiar with its mechanical and
electrical requirements. The installer required
relevant professional knowledge, and the system
must be installed and maintained by qualified
person with professional knowledge.
Please store this guide in a safe place for future
reference (maintenance), which would also be
useful when selling or disposing of the modules.
The module installer must inform the end
customer (or consumer) of the above matters
accordingly.
Jolywood reserves the right to change this
installation manual without prior notice.
Jolywood does not make any guarantee for any
express or implied information contained in this
manual. If customer fails to follow the
requirements listed in this manual during the
installation of the modules, the limited product
warranty provided would be invalidated.
For any of the following injuries or losses,
including but not limited to bodily injury and
property damage caused by module operation,
system installation errors, and failure to follow the
instructions of this manual, Jolywood is not
responsible for that.
Before installing, wiring, operating or maintaining
modules, you should read and understand all
safety rules. Modules will generate electricity
when exposed under a light source environment.
The generate electricity from array of multiple
modules would cause fatal electric shock or
burns. Person without authorization and relevant
training should not touch modules and wiring
terminals.
The modules of Jolywood have passed the tests of
IEC standards in certification agencies. Please rest
assured that you can use them under the premise
of complying with the requirements of this
installation manual.

2.3 operation instruction
2.3.1
3.0
Unload, Transportation and Storage
2.2.2
2.3.2
2.3.3
2.3.4
2.2.3
2.2.4
2.2.5
4
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Installation Manual - Jolywood N-type Mono-crystalline Double Glass Module
It is strictly forbidden to use modules with broken
glass. Damaged modules must not be repaired.
Contact with the surface of the modules may
cause electric shock. Do not disassemble the
module or remove any part of the module. Do not
artificially gather sunlight on these solar modules.
In order to avoid damage module, please do not
scratch or hit module, and do not use paint or
adhesive on the front or back side of module. In
order to ensure insulation performance of
modules from be damaged, please avoid
scratching, cutting the cables and connectors or
exposed under the sun for a long time. Do not
drop module or drop other things onto the
module surface. Do not place any heavy or sharp
objects on the module surface.
The operator of the system requires relevant
professional knowledge, and the system must be
installed and maintained by qualified person with
professional knowledge. Persons without
authorization and relevant training should not
touch modules and approach the installation area
or module storage area.
Do not connect the positive terminal of a single
module to the positive terminal of another
module. Please make sure that the polarity of
each module or module string is not opposite to
other modules or module strings. Please make
sure that there are no gaps between the insulating
washers of the joint. If there are gaps between the
insulating washers, it may cause the risk of fire or
electric shock.
According to the requirements of the National
Electrical Code, the maximum system voltage
should not exceed 1500V.
Please do not use water to extinguish fire when
the power is on.
It is forbidden to climb, step on, stand, walk or
jump directly on the package or module.
Preventive measures and general safety rules:
Modules should be stored in the original box
before installation. Please protect the package
from be damaged. Transport or unpack modules
Only work in a dry environment, and only use dry
tools. Do not work in a humid environment
without wearing any protective measures. When
exposed under the sun, no matter whether
module is connected or not, please do not directly
touch junction box, connector, cable or other
charged objects of module without any
protection.
Do not install module when the module is wet or
windy.

3.1.1 Prohibit discarding modules randomly,
special recycling is needed
3.1.2 Protect modules from rain or moisture
3.1.3 Modules in carton are fragile,
shall be handled with care
3.1.4 The package should be vertically up
during transportation
3.1.5 Do not step on or stand above
package or module
3.1 Marks on Outer Packaging
5
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Installation Manual - Jolywood N-type Mono-crystalline Double Glass Module
with recommended shipping method and
unpacking procedure. In order to avoid damage,
scratch or strike module. Do not apply pressure
directly on the module during transportation.
Improper transportation or installation also may
damage module, which is excluded from the
warranty. Do not stand, climb, walk or jump on
unpacked pallets of modules.
Always work under a dry environment, ensure
that all modules and electrical contacts are clean
and dry before installation. If it is necessary to
store the modules outdoors for a certain period of
time, always cover module and ensure that the
glass surface is facing down on a soft surface,
preventing water from entering inside of the
module, preventing connectors from be
damaged.
Unpacking must be operated by two or more
people at the same time. Do not lift module by
grasping module terminal box or lead wires. Use
both hands to carry the module and do not stack
modules. Do not place modules in an
environment without reliable support or unfixed.
Do not place any heavy objects or sharp objects
on modules.

3.1.6 Stack no more than 2 layers
3.2 Unloading Instructions
3.2.1
3.4
Storge
3.3 Secondary Transportation
and Precautions
3.3.1
3.2.2
3.3.2
2
6
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Installation Manual - Jolywood N-type Mono-crystalline Double Glass Module
When unloading modules from vehicle, less than
2 lots package could be lifted each time with a
reasonable fixture. Before lifting, ensure that the
trays and cartons undamaged, the hoisting ropes
are durable. When the hoisting is near the ground,
two men put carton gently on a relative flat
position. Using a forklift to remove modules from
the truck, unloaded modules should be placed on
a level surface. The depth of forklift forks into the
pallet shall not be less than 3/4 of the pallet
length.
When modules is temporarily stored in a project
site, modules should be placed in a dry and
ventilated place. Do not stack modules at a
project site. Cover modules with a tarpaulin, the
tarpaulin should be fixed by a curtain or mesh belt
to protect modules from moisture and rain.
Please store the modules in a dry and ventilated
environment and place the modules on a
relatively flat ground to avoid package damage or
dumping due to ground deformation or collapse.
Storage requirements: humidity <85%,
temperature range -40 ℃ -50 ℃.
If the modules need long-distance transportation
or long-term storage, do not remove the original
packaging, and keep the wrapping film and
packaging carton intact.
If the module would be transported for a too long
distance or stored for a long period, it is forbidden
to remove the original package. Modules
packaged with original package could be
transported by land, sea or air. During
transportation, fixing the package to the transport
platform to ensure it would not be tumbled.
Taking land transportation as an example. When
transported with truck, stacking up should be less
than two layers, it is forbidden to cut the
packaging belts of packages. There shall be no
gap between pallets or between pallets and truck
supports. If there is a gap, it must be filled with
fillers (inflatable bags, etc.) to prevent modules
from tilting and shaking during transportation.
It is forbidden to remove the original package
when modules transported at a project site. One
pallet transported each time is required. During
transportation, fixing package to the transport
platform to ensure that the package would not be
tumbled. Do not use tricycle to transport
modules. Do not handle modules with rope
during transportation, and it is forbidden to carry
or drag modules through the wires or junction box
of the modules.

4.1.2
4.2 Unpacking steps
4.2.1
7
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Installation Manual - Jolywood N-type Mono-crystalline Double Glass Module
4.0 Unpacking instruction
4.1 Unpacking safety instruction
4.1.1
For long-term storage of modules, it is
recommended to store them in a standard
warehouse for regular patrol inspection. In case of
abnormal inclination, please reinforce them in
time under the condition of ensuring personal
safety.
The shelves in the warehouse shall have sufficient
bearing capacity and storage space, and regular
patrol inspection shall be conducted to ensure the
safe storage of goods. If the modules need to be
stored in the project site, it is forbidden to select
the soft and collapsible ground. Instead, the hard
ground or the ground with high terrain should be
selected and leveled to ensure that the modules
will not collapse or tilt during long-term storage.
When modules unpacked outdoors, it is forbidden
to work under rain, as carton would become soft
and be broken. Modules inside of it would come
out, damage or bruises may be caused to module.
During windy days, special attention should be
paid for safety, it is recommended not to transport
modules, and the unpacked modules should be
properly fixed.
The ground needs to be flat enough to ensure
package could be placed horizontally and stably.
Supportive tool should be used when
disassembling the carton to prevent the modules
from falling down.
4.1.3
Wear protective gloves during unpacking to avoid
injury and fingerprints on the glass surface.
4.1.4
Module information could be queried from outer
package, please read it carefully before
unpacking.
4.1.5
Each module should be lifted by two man. Do not
lift module by grasping the module terminal box
or lead wires. Use both hands to carry module, do
not stack modules during lifting.
4.1.6
The unpacked modules must all be installed,
should not be stored at the project site. It is
forbidden to stack in the project site for a long
time, and the number of temporarily stacked
modules shall not exceed 16.
Before unpacking, please check the product name
and serial number on an A4 paper on the surface
of the package, unpacking method should not be
randomly changed.
In rainy weather, please use a rain cloth to
completely cover the modules and pallets, and
take rain and moisture-proof measures for the
pallets and cartons. In case of sunshine or wind,
remove the rain cloth to dry the outer packaging
as soon as possible, so as to avoid collapse due to
moisture deformation.It is forbidden to soak the
tray in the rain to cause mildew and decay. The
ground drainage measures should be taken first to
prevent the ground from being soft and sinking
due to a large amount of water on the ground
after the rain. Unauthorized access to the module
storage area is prohibited.

5.0 Installation
5.1 Installation Safety
5.1.1
8
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Installation Manual - Jolywood N-type Mono-crystalline Double Glass Module
4.2.2
When unpacking, cut all vertical packing belts
with a blade or scissors, first cut the long side
packing belt, secondly cut the short side packing
belt. Remove the upper cover of the carton and
take out two or three upper lifting brackets.
5.1.2
Do not remove module package before
installation.
5.1.3
When installing modules, only work in a dry
environment with dry tools. Do not work in a
humid environment without wearing any
protective measures. Do not install modules
under any rainy, snowy or windy conditions. Keep
the connectors dry and clean when installing
modules to avoid the risk of electric shock. If the
terminal of the module is wet, no work could be
done, otherwise electric shock may be caused.
Modules should be installed immediately after
unpacked.
5.1.4
Do not wear metal rings, wristwatches, earrings,
nose rings, lip rings, or other metal materials
when installing or repairing PV systems.
5.1.5
Use opaque materials to cover the module
completely during installation. Do not open the
electrical connection or pull out the connector
while the circuit is under load. Do not touch the
modules during installation unless necessary.
Glass surfaces and brackets may have high
temperature, which might lead to the risk of
hazards of burns and electric shock.
The modules produced by Jolywood could
installed landscape or portrait, the influence of
shading effect caused by dust could be minimized
when installed landscape.
4.2.4
Modules removed out of package are prohibited
from leaning against a without reliable support or
an unfixed object.
Double glass modules produced by Jolywood
could work for more than 30 years under proper
conditions. Modules with an expired life should be
reasonably disposed in accordance with local
laws and regulations. Besides requirement of IEC
certification, the product has been tested to verify
its resistance to ammonia, which may be present
near the cowshed, whether it could work in a wet
(coastal) areas, areas where sandstorms occur
frequently are also tested.
4.2.3
When removing modules from package, two
people stand must stand on each side of the box
while lifting the module, one hand grasping the
corner of the module, the other hand grasping the
short side of the module. When unpacking on a
horizontal floor, remove modules from one side to
the other side of package, and then carry them. If
unpacking on a non-horizontal floor, use a
supportive tool to ensure package placed
verticality.

①frame ②clip ③ M8 bolt ④mounting rail
④
②
③
①
5.2 Installation method
5.2.1 Mechanical installation and
precautions
5.2.2 Framed Bifacial Double-Glass
Modules (installation with clamps)
Clamp:
9
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Installation Manual - Jolywood N-type Mono-crystalline Double Glass Module
①
③
④
②
5.1.6
Do not damage the back glass of module when
modules mounted on the bracket. If modules
need to be replaced, do not damage the
surrounding modules or mounting structure.
5.1.7
When installing modules, do not work alone, and
keep working with a team of two or more men.
5.1.8
After modules are installed, the cables should be
fixed or tied to avoid exposed under direct
sunlight after installation, which would prevent
cable from aging. Low-hanging cables can cause
various problems, such as electric leakage and
fire.
5.1.9
The application level of module produced by
Jolywood is Class A. modules with different color
should be avoided from installed in the same
array or roof.
Mounted with 4 clamps along long frame.
C-shaped steel parallel to the long frame.
Edge Clamp: width=40-50mm,
height=30mm. A=350±30mm
maximum test load: front ≤2400Pa
back ≤2400Pa
snow and wind loads) depends on the way of
module installed. The mechanical load should be
calculated by the professional system designer
based on actual conditions and environmental.
Moreover, it does not withstand the excessive
force generated by the thermal expansion of the
support structure. The drain hole should not be
blocked under any conditions during installation
or use.
Modules could be mounted with clamps or bolts.
Modules Installation must be carried out
according to the following examples and
recommendations. If the installation method is
different from below methods, please consult
Jolywood local technical support or after-sales, to
obtain the consent of Jolywood, otherwise when
the modules is damaged, the limit warranty would
be invalid.
The mechanical load of the module (including
JW-HD120N/P

10
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Installation Manual - Jolywood N-type Mono-crystalline Double Glass Module
Mounted with 4 clamps along long frame.
C-shaped steel parallel to the long frame.
Edge Clamp: width=40-50mm,
height=30mm. A=350±30mm
maximum test load: front ≤2400Pa
back ≤2400Pa
Mounted with 4 clamps along long frame.
C-shaped steel perpendicular to the long frame
Edge Clamp: width=40-50mm,
height=30mm. A=350±30mm
maximum test load: front ≤5400Pa
back ≤2400Pa
JW-HD120N/P
Mounted with 4 clamps along short frame.
C-shaped steel parallel to the short frame
Edge Clamp: width=40-50mm,
height=30mm. A=250±30mm
maximum test load: front ≤1200Pa
back ≤1200Pa
Mounted with 4 clamps along short frame.
C-shaped steel parallel to the long frame.
Edge Clamp: width=40-50mm,
height=30mm. A=250±30mm
maximum test load: front ≤4800Pa
back ≤1200Pa
JW-HD120N/P
JW-HD120N/P
Mounted with 4 clamps along short frame.
Edge Clamp: width=40-50mm, height=30mm.
A=50~100mm
maximum test load: front ≤1200Pa
back ≤1200Pa
JW-HD120N/P

① M8 screw ② Flat washer ③ Spring washer
④ Nut ⑤ Mounting Rail
5.2.3
Framed Bifacial Double-Glass modules
（installation with bolts）
11
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Installation Manual - Jolywood N-type Mono-crystalline Double Glass Module
5.2.3.1
The mounting holes on the back of the module
frame are installed on the support structure with
Mounted with 4 clamps along short frame.
C-shaped steel parallel to the long frame.
Edge Clamp: width=40-50mm,
height=30mm. A=250±30mm
maximum test load: front ≤4800Pa
back ≤1200Pa
Mounted with 4 clamps along long frame.
C-shaped steel parallel to the long frame.
Edge Clamp: width=40-50mm,
height=30mm. A=450±30mm
maximum test load: front ≤2400Pa
back ≤2400Pa
Mounted with 4 clamps along short frame.
Edge Clamp: width=40-50mm, height=30mm.
A=50~100mm
maximum test load: front ≤1200Pa
back ≤1200Pa
Mounted with 4 clamps along long frame.
Edge Clamp: width=40-50mm, height=30mm.
A=50~100mm
maximum test load: front ≤1800Pa
back ≤1800Pa
Mounted with 4 clamps along long frame.
C-shaped steel perpendicular to the long frame
Clamp: width=40-50mm, height=30mm.
A=350±30mm
maximum test load: front ≤5400Pa
back ≤2400Pa
JW-HD120N/P
JW-HD144N/P
JW-HD144N/P

Bolt installation method:
12
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Installation Manual - Jolywood N-type Mono-crystalline Double Glass Module
stainless steel bolts(the screw faces the frame
mounting holes)
5.2.3.2
The modules are fastened at 8 points according to
load requirements or installation
requirements(Four points on the long side).
5.2.3.3
The tensile strength of M8*16 stainless steel outer
hexagonal bolts, nuts, bolts and nuts should not
be less than 450MPa, and the recommended
torque is 16 Newton•m.
5.2.3.4
The outer flat washer needs to use M8 (A2-70), a
stainless steel (SUS304) flat washer with an outer
diameter of 20±2 mm and a thickness of 1.1-1.2
mm; the corresponding stainless steel spring
washer thickness is 2.0±0.2mm.
The long frame uses the inner four holes (990mm)
for bolt installation
Mounting rail/C-shaped steel parallel to the
long side
maximum test load: front ≤2400Pa
back ≤2400Pa
The long frame uses six inner holes for bolt
installation
Mounting rail/C-shaped steel parallel to the
long side
maximum test load: front ≤2400Pa
back ≤2400Pa
The long frame uses the inner four holes (990mm)
for bolt installation
Mounting bracket/C-shaped steel perpendicular
to the long frame
maximum test load: front ≤5400Pa
back ≤2400Pa
Mounted with 4 clamps along long frame.
Edge Clamp: width=40-50mm, height=30mm.
A=50~100mm
maximum test load: front ≤1800Pa
back ≤1800Pa
Mounted with 4 clamps along long frame.
C-shaped steel perpendicular to the long frame
Clamp: width=40-50mm, height=30mm.
A=350±30mm
maximum test load: front ≤5400Pa
back ≤2400Pa
JW-HD120N/P
JW-HD144N/P
JW-HD120N/P

5.2.5 Grounding
5.2.5.1
13
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Installation Manual - Jolywood N-type Mono-crystalline Double Glass Module
5.2.5.2
Module could be grounded with a grounding
equipment listed by a third party. The equipment
must be installed in accordance with the
instructions given by the grounded equipment
manufacturer.
JW-HD144N/P modules can also be installed with
flat single axis tracker. The specific installation
methods are as follows:
All module frames and brackets must be properly
grounded in accordance with the appropriate
National Electrical Code. The grounding
conductor or grounding wire could be made with
copper, copper alloy or other material, which
should also be in accordance with the
requirements of corresponding National Electrical
Code. The grounding conductor must be
connected to the ground through a suitable
grounding methods.
5.2.4 Installation of full frame double
glass modules (Installation with flat
single axis tracker)
Use inner four holes for bolt installation
C-shaped steel perpendicular to the long frame
maximum test load: front ≤5400Pa
back ≤2400Pa
JW-HD144N/P
The long frame uses the inner four holes (400mm)
for bolt installation
maximum test load: front ≤1600Pa
back ≤1600Pa
JW-HD144N/P
The long frame uses the inner four holes
(1300mm) for bolt installation
maximum test load: front ≤2400Pa
back ≤2400Pa
JW-HD144N/P

5.2.6 Electrical Installation
14
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Installation Manual - Jolywood N-type Mono-crystalline Double Glass Module
5.2.5.3
Please visit http://www.jolywood.cn/ to view the
“Product Catalog” link for detailed grounding
holes locations and dimensions.
5.2.5.4
The electrical contact is formed by penetrating the
anodized coating of the aluminum frame and
tightening the ground screw (together with the
star washer) to an appropriate torque of 3~7N.m.
A properly sized ground wire (4-16mm2 copper
core wire) should be selected and mounted under
the connecting bolt.
Place the toothed washers, washers, and
grounding wires in turn, and screw the screws into
the grounding holes to connect the two adjacent
modules.
All wiring should be performed by a qualified and
trained person in accordance with local
regulations and procedures. Modules could be
connected in series to increase the operating
voltage by inserting the positive plug of one
module into the negative plug of another module.
Always ensure that the contact points are
corrosion-resistant, clean, and dry before wiring
modules. If the polarities of modules connected
wrong, may lead to irreparable damage. Before
modules connected in parallel, please check the
voltage and polarity of each module array. If the
polarity of products is opposite or Voltage
difference greater than 10V founded after
measurement, please check the configuration of
module array before its access to power grids.
All cables and connectors used to connect the DC
system must have similar (or higher) level. It is
suggested that all cables should run in proper
cable ducts and should be located away from the
water-prone area.
Each module has two standard 90°C shading
output cables with a plug-and-play connector on
each terminal. Jolywood modules are equipped
with a DC copper cable with a cross-sectional area
of 4mm², system voltage 1500V DC, insulation
layer maximum work temperature up to 90°C, also
UV-resistant. All cables used to connect the DC
system must have similar or high level. It is
required that all wiring and electrical connections
should be comply with the appropriate National
Electrical Code.
The voltage of modules shall not be higher than
the maximum voltage borne by the system, and
factors such as the lowest expected temperature
shall be considered. It is recommended to
calculate according to the following formula:
Maximum system voltage ≥ N x Voc x [1+ (Tcvoc x
(Tmin-25)]
Of which:
N represents the number of modules;
Voc represents the open circuit voltage of the
component;
Tcvoc represents the temperature coefficient of

Figure 1
Series connection
Parallel connection
Figure 2
Parallel connection after series connection
6.0 Maintenance for PV Modules
6.1 Module Visual Inspection and
Replacement
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5.2.7 Wiring
In order to ensure PV system could operation
smoothly, when connecting modules or
connecting loads (such as inverters batteries,
etc.), ensure that the polarity of the cables is
properly connected (Figure 1 and Figure 2). If
modules are not connected properly, the bypass
diode may be damaged. Modules could be
connected in series to increase voltage.
Connecting modules in series by inserting the
positive terminal of one module into the negative
terminal of the next module. Figure 1 shows the
serial connection of modules. Modules could be
connected in parallel to increase current (shown
in Figure 2). Connecting modules in series in
Parallel by inserting the positive terminal of one
module into the negative terminal of the next
module. The number of modules connected in
series or in parallel needs to be reasonably
designed according to the system configuration.
All instructions above must be followed to meet
the Jolywood Warranty valid conditions.
5.2.7.1 Fuse
The fuse should be connected to each
non-grounded pole of the array (in other words, if
system is not grounded, the fuse should be
connected to both positive and negative
terminals).
a) The maximum rating of the fuse
connected in series is 25A, and the
module-specific ratings are available on the
product label and product data sheet.
b) The fuse rating also corresponds to the
maximum reverse current that the module could
withstand (when an array is shading, the array is
loaded into another parallel module array to
generate power), thus the number of parallel
connected arrays is affected.
c) It is forbidden to connect two or more
strings in parallel and then share the fuses.
Modules in array should be regularly inspected to
check damage modules. If damage module is
the component open circuit voltage;
Tmin represents the minimum ambient
temperature;

6.2 Connector and Cable Inspection
6.2.1
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6.1.1
Maintenance should be carried out at least once a
year by trained person. As system voltage is so
high, that maintenance person should always
wear rubber gloves and insulated boots.
Removing all possible shading of the solar array,
which would affect power generation of the
module array.
6.1.2
Check if the installed hardware is securely in
place.
6.1.5
Cover the front surface of Modules with an opaque
material. Modules exposed under the sun could
be extremely dangerous, as high voltages could
be generated.
6.1.6
Module junction boxes is equipped with bypass
diodes to minimize module heating and current
loss.
6.2.2
Check the electrical, grounding, and mechanical
connections every 6 months to ensure that they
are clean, safe, free from damage, and rust-free;
ensure that the mountings properly tightened;
check all cables to make sure they are tight.
6.2.3
It is forbidden to use WD-40 or various organic
solvents to wipe all parts of the junction boxes,
wires, and connectors.
6.2.4
The dustproof plug should not be removed in
advance, it can only be removed during
installation.
Check if all cables are securely connected. It is
suggested that all cables should run in proper
cable ducts and should be located away from the
water-prone area.
6.1.3
Check if all array fuses in each of the
non-grounded poles are working properly.
6.1.4
If module is damaged (glass breakage or scratches
on the back glass), it is need to be replaced.
Module must be replaced with same type one. Do
not touch the live parts of the cables or
connectors when replacing modules. Use
appropriate safety guards (insulation tools,
insulated gloves, insulated boots, etc.) when
handling modules.
it must be replaced with same type one. Such as
broken glass, broken cables, damaged junction
box, etc., which would lead to functional and
safety failure of modules.
Well-designed solar systems require minimal
maintenance, and some simple steps could be
taken to improve system performance and
reliability.

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6.3 Cleaning
The amount of electricity produced by a solar
module is proportional to the amount of light
reach on surface of it. A dust covered module
produces relatively lower power, so it is important
to keep module clean.
6.3.1 Water quality requirements
6.3.2 Module inspection after
cleaning
6.3.2.1
PH: 5 ~7;
Chloride or salt content：0 - 3,000 mg/L;
Turbidity：0-30 NTU;
Conductivity:1500~3000 μs/cm;
Total dissolved solids：≤1000 mg/L;
Water hardness：0-40 mg/L;
Non-alkaline water must be used, use
demineralized water when conditions are
available.
Note: when using robot clear modules, Jolywood
recommends using soft plastic brush. Module
damage, poor appearance and power
degradation caused by improper robot clear are
not within the warranty scope of Jolywood;
a) The PV module should be cleaned under
the irradiance of less than 200W/m2. Avoiding
cleaning water with great different temperature
from air to avoid cracking. Hard water needs to be
softened. The water remains should be removed
from glass surface after cleaning.
b) It is strictly forbidden to clean PV modules
under special weather: wind level greater four,
heavy rain or heavy snow.
c) During cleaning, the water pressure on
the surface of module glass shall not exceed 4MPa
, and the module is not allowed to withstand
additional external force.
d) During cleaning, it is strictly forbidden to
step on the modules, splashing water to the back
of the modules or cables. Ensure that connectors
are clean and dry to prevent electric shock and
fire hazard. Steam clean machines are strictly
prohibited; soft parts, Cloth and mild detergent
and water should be used. Do not put modules
directly into the water. Serious thermal shocks
also could damage modules.
e) The difficult-to-clean substances such as
oil on the surface of modules, use a non-friction
neutral liquid cleaner. Do not use any organic
solvent containing alkali or acid. Do not use
corrosive solvents or wipe the PV modules with a
hard object.
f) If you are not sure whether the array need
to cleaned, first select a column of particularly
dirty array to begin cleaning. If the power
generated increased less than 5%, cleaning is
usually not required. The above verification
should be carried out only under a stable
sunshine rate (sunny, strong sunshine, no cloud).
g) The back of the PV module usually does
not need to be cleaned; If you need to clean the
back of the PV module , ensure that the cleaning
liquid does not penetrate into the bottom layer of
the material.
h) Regularly trim the vegetation to prevent
shading created on the module surface, which
would decrease power generation.

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6.3.2.2
The module brackets are not tilted or bent after
cleaning, the module terminals are not
disconnected.
6.3.2.3
After modules cleaned, complete the PV module
cleaning record.
The overall appearance of modules is clean,
bright and free of stains. The surface of module
should no ash accumulation; there is no obvious
scratch on the surface of module. No cracking
occurs on the surface of module.
6.3.3 Troubleshooting
If module does not work after installation, please
notify the installer immediately.
7.0 Technical Issues or Claims
If you have any questions about technology or
claims, please contact the installer.
Please visit http://www.jolywood.cn/ to contact
Jolywood after-sales service team.
Please submit the Customer Feedback
Information Form at http://www.jolywood.cn/.
Our technical service representatives will contact
you within 5 working days. The required
username and password will be sent via the
Customer Service link.
Please download the specifications or data sheets
for modules from http://www.jolywood.cn/.