BYD P6K Series Guide

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Document Issue or Modification Record
Edition
Date
ECN code
Modification content
Writed or modified
1
2013-02-05
/
/
Mingguang Wang，Yingying Xu，
Qin Cang
2
2013-08-08
/
Add Shangluo Factory
Xu Yingying
3
2013-09-27
/
Modify manufacturer name and address
Xu Yingying
4
2014-5-16
/
a,Modify the explain of bar code;
b,Modify the installation picture
c,Add the Parameter of Modules
d, Canceled information of manufacturer
Fang Shuili，Han Peng
5
2014-9-5
/
Add manufacturer location
Fang Shuili
6
2015-3-5
/
Add Vietnam Factory
Han Peng
7
2015-8-28
/
Add Insertion system on the short side of the frame
HanPeng, BaoWei
8
2016-06-01
/
Increasing the power level of the model
HanPeng
9
2016-06-15
/
Modify naming PV modules
HanPeng
10
2016-09-29
/
Add new frame of the P6-18
HanPeng
11
2016-11-03
/
Add information of 1500V system Voltage of
module and delete some low power modules
ZhaoBishuai
12
2016-2-10
/
Add information of 1100V system Voltage of
module
ZhaoBishuai
13
2017-4-5
/
a. Add Runda factory;
b. Modify module cleaning.
Li Chao, Yuan Shuyun,
Cheng Yaru

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14
2017-11-29
/
a. Add half-cell module
b. Modify cleaning pressure
c. Add installation height of module
Zhao bishuai
Mao yonghua
15
2017-12-20
/
Add an equation for calculating the voltage of sting
Li Shangkun
16
2018-5-23
/
a. Modify power for P6K module
b. Add PHK-30 module’s power
c. Add MHC-36 module’s power
d. Add MHK-36 module’s power
e. Add Santaicheng factory
f. Add IEC 61215 new standard for load
Zhao bishuai

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Installation Manual and User Manual for
BYD Photovoltaic Modules
BYD COMPANY LIMITED.
ADD: No.1, Yan'an Road, Kuichong, Longgang District,
518119,Shenzhen City,Guangdong, P. R. China
TEL:[phone]
FAX:[phone]
www.byd.com.cn

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CONTENT
Foreword.................................................................................................................................................................................................................................................................. 4
1. Product identification.......................................................................................................................................................................................................................................5
1.1 Label................................................................................................................................................................................................................................................................ 5
1.2 Barcode........................................................................................................................................................................................................................................................... 5
2. Transportation and storage manual............................................................................................................................................................................................................. 5
3. Installation...........................................................................................................................................................................................................................................................6
3.1 Warning...........................................................................................................................................................................................................................................................6
3.2 Mechanical installation..................................................................................................................................................................................................................................8
3.2.1 Mounting system.................................................................................................................................................................................................................................... 8
3.2.2 Clamping................................................................................................................................................................................................................................................11
3.2.3 Insertion system................................................................................................................................................................................................................................... 12
3.3 Electric installation.......................................................................................................................................................................................................................................14
3.3.1 Grounding..............................................................................................................................................................................................................................................14
3.3.2 General Installation.............................................................................................................................................................................................................................. 15
4. Maintenance and Care....................................................................................................................................................................................................................................19
4.1General Maintenance...................................................................................................................................................................................................................................19
4.2 Module Cleaning..........................................................................................................................................................................................................................................20
5．Claim................................................................................................................................................................................................................................................................. 22
Foreword
This manual describes the transportation, installation and
maintenance of PV modules (hereafter referred to as “module”). Please

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read this manual carefully before installing and using the modules.
Please get in touch with the provider if you have any questions.
This manual applies to all the standard modules of BYD Company
Limited.
Keep this guide in a safe place for future reference (care and
maintenance) and in case of sale or disposal of the modules.
NOTE: All statements in this manual refer to our 3 or 4bus-bar
polycrystalline cell PV modules .The illustrations in this manual,
which show 2 or 3 bus-bar cell PV modules, are only used for
reference purposes.
1. Product identification
1.1 Label
The label shows the product type, rated power, rated current, rated
voltage, open circuit voltage, short circuit current, weight, dimensions
etc.;
1.2 Barcode
Each module has only one bar code as shown below:
FIG.1 Bar code
SH 130701 P630 ASEC 001
SH——Manufacturer location, SH:Shanghai; SA:South Africa
SL:Shangluo; TS:Tangshan Haitai; VN:Vietnam; RX:Ruixin; BR:Brazil;
RD:Runda; GL:Guolong（Dingxinsheng）;ST:Santaicheng;
130701——Date（YYMMDD）;
P——P for Poly -Si，M for Mono-Si; L for Mono-like
6——6 for the cell dimension of 156*156，5 for the cell dimension
of 125*125mm, 7 for the cell dimension of 156.75*156.75; H for the cell
dimension of 156.75*78.375mm
30——the voltage of the modules;
ASEC- ——Engineering Code ,for different shifts, materials etc;
001——Number of product components,3 digit sequence 0 to 999
for sequential production starting on each new day of production at 001.
2. Transportation and storage manual
Please observe the following criteria after packing:
(1) Don’t tilt the packing boxes for more than 15° during handing.
(2)Please follow the instruction labels “up” and “down” during

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placing the packing boxes and avoid placing them upside down during
transit.
(3)Be careful while handing the boxes during transit, and avoid
heavy pressure or jolting of the boxes.
(4)The packing boxes should be protected from rain.
(5)Transportation conditions should conform to the requirements of
the packing boxes and of the modules regarding their environmental
conditions.
3. Installation
3.1 Warning
(1) Do not use mirrors or other magnifiers to artificially concentrate
sunlight on the module.
(2) Do not touch the connectors with bare hands and use insulated
tools during electrical work.
(3) Although the glass surface of the modules is rather durable and
able to withstand pressure, the glass might break (and the module will
no longer work properly), if it is dropped or hit by tools or other heavy
objects.
(4) Under certain conditions, the module might produce a higher
electric current and/or voltage than measured under standard test
conditions. Accordingly, the values of Isc and Voc marked on this module
should be multiplied by 1.25 when determining the component voltage
ratings, conductor current ratings, fuse sizes and size of controls
relating to the PV output.
(5) The installation work of the PV array can only be done under
the protection of sun-sheltering covers or sunshades, and only qualified
persons should install modules or perform maintenance work.
(6) Systems should be installed by qualified personnel only and at
least by two persons. The system involves electricity and can be
dangerous if the personnel are not familiar with the appropriate safety
procedures.
(7) Follow the recommendations of the battery manufacturer if
batteries are used with the modules. Please observe national and local
laws and regulations when installing modules. If required, an
architecture license should be obtained before carrying out this work.
(8) Please unpack carefully.
(9) A visual inspection should be carried out before installation, in
order to make sure that there is no defect in the packing, the junction
box or on the surface of module.
(10)The user should design and select a metallic bracket for
installing that is suitable to bear the weight of the PV modules. The
brackets should be selected by the user according to their destined
places of installation, such as open land or a rooftop. For safety
reasons, all brackets should be grounded. In order to insure good
conductivity, electroplated brackets should be used.
(11)As a general rule, PV modules should be installed in a location
where they will receive maximum sunlight throughout the year. In the

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Northern Hemisphere, the modules should typically face south, and in
the Southern Hemisphere, the modules should typically face north.
When choosing a site, avoid trees, buildings or other obstructions,
which might block the sunrays. When selecting a clamping or insertion
system, appropriate anticorrosive brackets should be selected
according to the specification of the module.
(12) Put the modules on the frame and tighten the screws after
putting on the underlying washers. Don't cover the drain holes with
other components when installing the modules. The junction box should
be placed at the top of the module in order to facilitate correct
positioning of ventilation holes.
(13)Don’t grasp the junction box or cables during the installation
process.
(14) In case of installing the module on a roof top, the roof top
should be made fire-resistant first. Do not use modules near equipment
or in places where flammable gases may be generated.
(15)In case of roof top installation, the PV array should fulfill the
requirements regarding fire resistance of the norm IEC 61730-2.
(16)The ambient temperature range at the location of installation
should not exceed -40°C ~+85°C.
(17) Do not connect/disconnect modules during load connection.
(18) If the modules are installed on the roof, the whole system
mounting should be installed around 20CM away from the roof. The
recommended standoff height is 20 cm. The PV array installation slope
should more than 5in/ft (127mm/305 mm) when modules are installed in
rooftop. The module is in a minimum fire resistance rating of Class C,
and the fire rating of this module is valid only when mounted in the
manner specified in the mechanical mounting instructions.
(19) If the component is installed on the roof, the structure must
have a high bearing capacity, common roof structure such as color
steel roofs, cement flat roofs, the glazed tile roof, etc.
(20) If the modules have the area of the salt crystals which exceed
5% of the modules on façade then should clean it up. We advice that
the modules should cleanly at every turn.
(21) We suggested that the height of the module from the ground is
not less than 60cm, in order to prevent the hot –spot caused by the
weeds.
DANGER: One single module may generate more than 30V DC
when its front is exposed to direct sunlight. If modules are
connected in series, the total voltage is equal to the sum of the
partial voltages of each module .A nominal open voltage or maximum system
voltage of 45 V or more may cause an electric shock, exist in the conspicuous
position of a module connection part. Therefore direct contact should be
avoided after installing a greater number of modules in series or parallel, in
order to avoid electric shocks.
CAUTION: Please unpack the module in an
appropriate environment, and use special
tools. The modules need to be kept water-proof
and damp-proof.

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NOTE: BYD does not limit the materials of the installation as long as they can
be used outdoors for at least 25 years
3.2 Mechanical installation
3.2.1 Mounting system
Use screws put through the mounting holes according to the
following figure for fixing the module,If all mounting holes are used, a
load of 5400Pa for frontal, a load of 2400Pa for back(IEC61215 2005);
a load of 3600Pa for frontal, a load of 1800Pa for back(IEC61215 2016
safety factor 1.5).
Description of the mounting holes:
FIG.2 PHT/PHL series models
FIG.3 PHK/PHC series models

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FIG.4 P6K/P6C series models
5TAB.1 The size of each code
measure
Model
L
W
T
A
B
C
P6C-18
1482
676
50/40/35
626/628
802/482
566
P6C-24
1325
992
50/40/35
942
476
1076
P6C-27
1482
992
50/40/35
942
500
1100
P6C-30
1640
992
50/40/35
942
860
1360
P6C-30
1650
992
50/40/35
942
860
1360
P6C-30
1645
992
45/40/35
942
860
1360
M6C-30
1645
992
45/40/35
942
860
1360
P6C-36
1962
992
45/40/35
942
800
1300
P6C-36
1956
992
50/40/35
942
800
1300
PHC-30
1669
992
50/40/35
942
860
1360
MHC-30
1669
992
50/40/35
942
860
1360
PHC-36
1992
992
50/40/35
942
800
1300
MHC-36
1992
992
50/40/35
942
800
1300
PHT-36
1948
1022
50/40/35
972
800
1300
P6E-18
1482
676
50/40/35
626/628
802/482
566
P6E-24
1325
992
50/40/35
942
476
1076
P6E-27
1482
992
50/40/35
942
500
1100
P6E-30
1640
992
50/40/35
942
860
1360
P6E-30
1650
992
50/40/35
942
860
1360
P6E-30
1645
992
45/40/35
942
860
1360
P6E-36
1962
992
45/40/35
942
800
1300
P6E-36
1956
992
50/40/35
942
800
1300
P6K-18
1482
676
50/40/35
626/628
802/482
566
P6K-24
1325
992
50/40/35
942
476
1076
P6K-27
1482
992
50/40/35
942
500
1100
P6K-30
1640
992
50/40/35
942
860
1360
P6K-30
1650
992
50/40/35
942
860
1360
P6K-30
1645
992
45/40/35
942
860
1360
PHK-30
1669
992
50/40/35
942
860
1360
MHK-30
1669
992
50/40/35
942
860
1360
M6K-30
1645
992
45/40/35
942
860
1360
P6K-36
1962
992
45/40/35
942
800
1300

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P6K-36
1956
992
50/40/35
942
800
1300
PHK-36
1992
992
50/40/35
942
800
1300
MHK-36
1992
992
50/40/35
942
800
1300
PHL-36
1948
1022
50/40/35
972
800
1300
M6C-36
1962
992
50/40/35
942
800
1300
M6K-36
1962
992
50/40/35
942
800
1300
Remark: The P6C-18 have two mounting hole arrangements. One have four
Mounting holes , The other have eight Mounting holes. “C” denotes 1000V
system Voltage of module, “E” denotes 1100V system Voltage of module, “K”
denotes 1500V system Voltage of module, “L” denotes 1500V system Voltage
of half-cell transverse module.
During installation of the modules it should be made sure, that all
mounting holes are used for fixation, the number of mounting holes for
each module series is indicated in the table below:
TAB.2 Number of mounting holes for each series of components
Model
measure
n
Measure
n
P6C-18
4/8
P6K-18
4/8
P6C-24
8
P6K-24
8
P6C-27
8
P6K-27
8
P6C-30
8
P6K-30
8
P6C-36
8
P6K-36
8
PHC-30
8
PHK-30
8
PHC-36
8
PHK-36(1992)
8
PHT-36
8
PHL-36(1948)
8
P6E-18
4/8
M6K-30
8
P6E-24
8
M6K-36
8
P6E-27
8
MHK-30
8
P6E-30
8
MHK-36
8
P6E-36
8
Installation details:
FIG.5 Diagram of pressure installation under 5400Pa
1) Aluminum Frame
2) M8 Stainless Bolt M8
3) Flat Stainless Washer

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4) Spring Stainless Washer
5) HEX Stainless Nut
3.2.2 Clamping
For clamping of the modules, clamps can be used as in the figure
below, while the clamps must be strong enough to fasten the modules
(the use of stainless steel is recommended), and their structure must
not cover the cells. A load of 5400Pa for frontal, a load of 2400Pa for
back(IEC61215 2005); a load of 3600Pa for frontal, a load of 1800Pa
for back(IEC61215 2016 safety factor 1.5).
If a module is installed with clamps on a long side of the frame, “B”
denotes the possible clamping range:
FIG. 6 Installation diagram of four fixtures under pressure of 5400Pa
TAB. 3 The dimensions corresponding to fixture installation
Model
Measure
P6C-18
P6C-24
P6C-27
P6C-30
(L=1640)
P6C-30
(L=1650)
P6C-30
(L=1645)
P6C-36
(L=1956)
P6C-36
(L=1962)
A
120
110
120
140
145
142.5
328
331
B
250
250
250
250
250
250
250
250
Model
Measure
P6E-18
P6E-24
P6E-27
P6E-30
(L=1640)
P6E-30
(L=1650)
P6E-30
(L=1645)
P6E-36
(L=1956)
P6E-36
(L=1962)
A
120
110
120
140
145
142.5
328
331
B
250
250
250
250
250
250
250
250
Model
Measure
P6K-18
P6K-24
P6K-27
P6K-30
(L=1640)
P6K-30
(L=1650)
P6K-30
(L=1645)
P6K-36
(L=1956)
P6K-36
(L=1962)
A
120
110
120
140
145
142.5
328
331
B
250
250
250
250
250
250
250
250
Model
Measure
PHC-30
M6K-30
(L=1645)
PHC-36
(L=1992)
PHK-36
(1992)
PHT-36
(1948)
PHL-36
(1948)
M6C-36
(L=1962)
M6K-36
(L=1962)
A
158
142.5
346
346
324
324
331
331
B
250
250
250
250
250
250
250
250
Model
Measure
MHK-30
(L=1669)
MHK-36
(L=1992)
A
158
346
B
250
250

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Remark: “A” denotes the distance from the clamp to the edge of the module,
while “B” denotes the possible clamping range.
Installation method:
FIG. 7 Schematic diagram of long side pressing block
We advise users to use an installation method as shown in the two
pictures above, as this method renders modules connection rather fast.
Installation method with clamping on the short side of the frame as
below:
FIG. 8 Schematic diagram of four clamps under pressure of
2400Pa
Installation method:
FIG. 9 Schematic diagram of short side pressing block
Notice: If customer choose Installation method with clamping on
the short side of the frame, you should customize the length of
the electric cable for us.
3.2.3 Insertion system
For the modules to follow an insertion system as depicted below
can be used for installation. The insertion system must have enough
strength to fix modules, and can be made of materials such as stainless
steel and other appropriate metals for solid support of the PV modules.

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FIG. 10 Installation diagram of long side guide rail under pressure
of 5400Pa
FIG. 11 Guide rail installation diagram
During the installation on the long side of the frame you need to
take care that the cells on the front side and that the grounding holes on
the back side don´t get covered. Please refer to the detailed illustration
below for installation on the long side of the frame:
FIG. 12 Guide rail installation diagram
FIG. 13 The front cannot block the PV
plate and the back cannot block the grounding hole

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The installation mode of the half-cell intermediate outgoing module is
recommended the long edge to be parallel the ground; The installation
mode of the half-cell long edge outgoing module is recommended the
short edge to be parallel the ground.
All the mounting ways above are suitable to roof mounting. And the
module is considered to be in compliance with IEC61215 when the
module is mounted in the manner specified by the mounting instruction
above.
Tab 4. List of mounting modes with border thickness
Thickness
Installation
50mm
45mm
40mm
35mm
30mm
Refer
Long side bolt
√
√
√
√
√
FIG.2
FIG.3
FIG.4
FIG.5
Long side
press
√
√
√
√
√
FIG.6
FIG.7
Long side rail
√
√
√
√
√
FIG.10
FIG.12
FIG.13
Short side
press
√
√
√
×
×
FIG.8
FIG.9
Short side rail
√
√
√
×
×
FIG.11
FIG.12
FIG.13
Note: √: Indicates compliance with load bearing installation
requirements; X: indicates that the load bearing installation
requirements are not met
3.3 Electric installation
3.3.1 Grounding
(1) Grounding: For safety reason, all module frames should be
prepared for grounding. It is not recommended to use modules with
different configurations (grounding, wiring) in the same system. The
connecting areas between the materials of the frame and the grounding
should not cause galvanic corrosion.
(2)Regarding grounding and bonding requirements, please refer to

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regional and national safety and electricity standards. If grounding is
required, use a recommended connector type, or an equivalent, for the
grounding wire. The grounding wire must be properly fastened to the
module frame to assure adequate electrical connection.
(3) There are many possible methods for grounding. The main point
is to ensure the resulting safety. We recommend one method as
sketched below:
FIG. 14 Ground diagram
(4) All module frames should be grounded for safety. All materials
for grounding connections between modules must be approved by a
qualified electrician and also, the grounding itself must be done by a
qualified electrician. The ground wire should have at least the same
size as the electrical conductors(10-12 AWG exposed copper wire with
a minimum of 90°C is recommended).
(5)In order to avoid potential induced degradation （PID ）,BYD
insists that the negative electrode of the inverter should be grounded.
CAUTION: BYD modules provide the mounting holes, drain
holes and grounding holes. That has passed the safety testing.
Installers can’t drill and block drain holes at random.
3.3.2 General Installation
(1)The module was rated for use in the A application class which
follows the items referred in IEC 61730-1.When the modules in a PV
system are connected in series or parallel generally, we recommend
simple methods of connecting them in series or parallel as shown
below:
Series connection of modules:
Parallel connection of modules:

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(2) The bypass diode should have a Rated Average Forward
Current at least 10A, and a Rated Repetitive Peak Reverse Voltage of
at least 40V.The diode types are as below:
Type
Maximum DC Blocking Voltage
Maximum Average Forward Current
20SQ045
45V
20A
10SQ050
50V
10A
GF2045MG
45V
20A
SDA2040
40V
20A
(3)For field connections, use minimum 12 AWG（E300485 PV
Wire）copper wires insulated for a minimum of 90°C,Suggest
using 202 connectors（For 1000V）/202B connectors（For
1100V/1500V）.
(4) The cable must not be bent or crushed on the direct exit of
the cable screw joint include connecter and box. A minimum
bending radius R≥4×cable diameter must be maintained. The
cable must be routed in a way that tensile stress on the conductor
or connections is prevented. The pictures are as below:
(5) The maximum number of series connected modules depends
on the system design, the type of inverter used and environmental
conditions. According to the system voltage (1000V) of the IEC
standard. Under normal conditions, a PV module is likely to experience
conditions that produce more current/voltage than reported at STC.
Accordingly, Isc and Voc must be multiplied by 1.25 (for C-Si or
non-C-Si) we recommend the maximum number of series connected
modules for each module series as stated below:
Type
The maximum number of
modules in series
BYD ***P6-18/P6C-18
≤34

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BYD ***P6-24/P6C-24
≤26
BYD ***P6-27/P6C-27
≤23
BYD ***P6-30/P6C-30
≤20
BYD ***P6-36/P6C-36
≤17
BYD ***M6-36/M6K-36
≤16
BYD ***P6-30/PHC-30
≤20
BYD ***M6-30/M6K-30
≤20
BYD ***P6-30/PHC-36
≤17
BYD ***P6-30/PHT-36
≤17
And the electrical characteristics are within +/- 10% of the indicated
values of Isc, Voc, Pmax under STC.
According to the system voltage (1100V) of the IEC standard.
Under normal conditions, a PV module is likely to experience conditions
that produce more current/voltage than reported at STC. Accordingly,
Isc and Voc must be multiplied by 1.25 (for C-Si or non-C-Si) we
recommend the maximum number of series connected modules for
each module series as stated below:
Type
The maximum number of
modules in series
BYD*** P6E-18
≤37
BYD*** P6E-24
≤28
BYD*** P6E-27
≤24
BYD*** P6E-30
≤22
BYD*** P6E-36
≤19
BYD ***M6-36/M6K-36
≤17
And the electrical characteristics are within +/- 10% of the indicated
values of Isc, Voc, Pmax under STC.
According to the system voltage (1500V) of the IEC standard.
Under normal conditions, a PV module is likely to experience conditions
that produce more current/voltage than reported at STC. Accordingly,
Isc and Voc must be multiplied by 1.25 (for C-Si or non-C-Si) we
recommend the maximum number of series connected modules for
each module series as stated below:
Type
The maximum number of
modules in series
BYD ***P6-18/P6K-18
≤51
BYD ***P6-24/P6K-24
≤39
BYD ***P6-27/P6K-27
≤34

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BYD ***P6-30/P6K-30
≤31
BYD ***M6-30/M6K-30
≤30
BYD ***P6-36/P6K-36
≤26
BYD ***M6-36/M6K-36
≤24
PHK-30
≤31
PHK-36(1992)
≤26
PHL-36(1948)
≤26
And the electrical characteristics are within +/- 10% of the indicated
values of Isc, Voc, Pmax under STC.
Additionally, there is an equation for calculating the modules
amount in one string. It also depends on the system voltage and the
lowest temperature in latest 40 years. The equation is below,
 
1 25oc systemN V T V 
 
    
 
 
 
Here：N---means the module’s amount;
Voc---means the module’s voltage under STC;
β---means the voltage temperature coefficient;
T---means the lowest environment temperature in latest 40
years;
Vsystem---means the system voltage of the module.
(6)For parallel connection, the current will be added up and the
used connectors will be limited by the number of parallel connection.
We recommended the maximum number of modules is 3. The fuse
protection needs to be determined as well.
(7)To prevent the cables and the connectors from overheating, the
cross section of the cables and the capacity of the connectors must be
selected to suit the maximum system short circuit current. Please note
that the upper limit temperature of cable is 90°C and that of the
connector is as follows:
Connector Type
The upper limit temperature
PV-SKT4/xy & PV-KBT4/xy（For 1000V）
105℃
05-1 、05-6 （For 1000V）
100℃
ZH202（For 1000V）
100℃
TS02（For 1000V）
100℃
TS01（For 1100V/1500V）
100℃
ZH202B（For 1100V/1500V）
100℃
(8)There is no general limitation on the number of parallel
connected modules but the number of modules is determined by
system design parameters such as current or power output. Every PV
array in parallel should install a protection circuit.
(9) Please refer to local laws and regulations to determine the
system wires size, type and temperature. To prevent the cables and the
connectors from overheating, the cross section of the cables and the

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capacity of the connectors must be selected to suit the maximum
system short circuit current (the recommended cable cross section is
4mm2for a single module or a rated current of the connectors of more
than 10A). Our module’s maximum fuse rating current is 15A.
NOTE: Please note that the upper temperature limit is 90°C for
cable and 100°C for the connectors. We demand the
connection must be matching BYD’s, otherwise BYD don’t
responsible for anything about performance problem caused by your
action.
4. Maintenance and Care
4.1General Maintenance
The following inspections of the modules should be carried out in
regular intervals:
(1) Regularly check the mechanical installation of the module.
Check the support equipment for fastness and symptoms of corrosion
or other damages. Check bolts and nuts for loosening, especially the
places with exposure to hard winds or at times of jolting. Ensure that the
fixing is fast and fasten immediately in places with some looseness. If
conditions permit the metal fittings that fasten or support the modules,
such as the bolts and nuts, should be protected from corrosion. A firs
inspection should be carried out 12 months after installation and
inspections every 10 years thereafter.
(2)Regularly check the electric wiring of the modules for reliable
connection to the components of the equipment and the grounding
system. Check regularly, if the value of the grounding resistance is still
reaching the designated requirement, If connections are not fast, fasten
them by soldering. After a thunderstorm or before the start of the stormy
season check the convergence box and the lightning protection
systems installed inside the equipment for loss of function and change
them immediately if necessary.
(3)Check cables, connectors and joints for current leakages and
deal with it, in order to prevent leakage currents caused by rainy or
snowy weather when checking the wiring, people must take insulation
equipment (such as tools and gloves etc,) with them and avoid touching
the bare parts of connectors or joints with bare hand, Check the system
for loosen parts of the connectors and fasten where necessary to
ensure good contact. Wipe the dust from the equipment regularly to
keep it clean.
(4) If the module appears in need of repair, the surface of the
module should be covered with fabric or other material. There is a
danger of high voltage, if the sun ray directly hit the module.
CAUTION: If you come across loose connectors, please
contact Supplier or Maintenance and let them carry out
maintenance and care.

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4.2 Module Cleaning
Excess dirt and dust accumulating on the glass surface of the
module can reduce its power output. Therefore BYD recommends
periodic cleaning of PV modules especially during times when the
modules do not have the expected power output. The cleaning process
must be implemented after the PV modules are disconnected and
cooled, and after cleaning PV modules must ensure dry ,next it are
connected. Non-professional authorized personnel are not allowed to
clean modules, and make sure they have appropriate safety equipment
for aerial work and the risk consciousness of high altitude work. Please
check the glass surface of the module for cracks and damages before
cleaning. If there are already cracks on the module, please do not clean
but inform the installer or maintenance service provider. Do not wear
metal accessories like a watch or jewelry during cleaning PV modules,
avoid the broken of modules.
4.2.1 Module Cleaning Condition
The cleaning works of PV module should be carried out at morning,
evening, overcast sky or irradiance less than 200W/m2. The use of cold
water to clean a PV module heated up sunshine might cause cracks in
the glass cover of the module, so strictly forbidden proceed cleaning
work during the noon or a strong period of sunlight.
4.2.2 Module Cleaning Method
Module cleaning method divided into general clean and washing
clean.
1. General Clean
(1) To the attachment which can easy to clean like dry dust, leaves
on the PV module surface, cleaner can use dry and professional mop or
soft cloth to clean.
(2) To the attachment which are not easy to clean like mud, birds
droppings, sticky stuff on the PV module surface, cleaner can use
scraper or gauze to wipe, but avoid using hard material, to prevent
destroy glass surface. Use cleaning effect to judge whether clean or
not.
2. Washing Clean
(1) To the inorganic compound like wet dust which are not easy to
clean on the PV modules surface, cleaner can carry out general clean
(2) first, then use clean water which pressure less than 500KPa to
washing, finally, use clean gauze wipe the waterlogging. To avoid cell
micro crack or module broken, cleaner must attention the water
pressure should not too large.
(2) To the organic like animal corpse (such as mosquitoes and
flies), dung or plant sap which are closely attach to the glass surface,
cleaner can carry out general clean (2) first, then use clean water which
pressure less than 5MPa to washing meanwhile match up professional
cleaner like soft soap water or neutral disinfectant (such like alcohol,