SAJ R6 Series User manual

R6 Series Solar Inverter
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Tel: [phone] Fax: [phone] Web: www.saj-electric.com
Add: SAJ Innovation Park,No.9, Lizhishan Road,Science City, Guangzhou High-tech Zone , Guangdong, P.R.China
GUANGZHOU SANJING ELECTRIC CO.,LTD
R6 Series
SOLAR INVERTER USER MANUAL
R6-5~10K-S2-X R6-5~10K-S3

R6 Series Solar Inverter
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Preface
Thank you for choosing SAJ solar inverter. We are pleased to provide you first-class products and
exceptional service.
This manual includes information for installation, operation, maintenance, trouble shooting and safety.
Please follow the instructions of this manual so that we can ensure delivery of our professional guidance
and wholehearted service.
Customer-orientation is our forever commitment. We hope this document proves to be of great
assistance in your journey for a cleaner, greener world.
Please check for the latest version at www.saj-electric.com
Guangzhou Sanjing Electric Co., Ltd.

R6 Series Solar Inverter
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1. SAFETY PRECAUTIONS ..........................................................................................................................1
1.1 Scope of Application........................................................................................................................................................ 2
1.2 Safety Instructions ............................................................................................................................................................2
1.3 Target Group....................................................................................................................................................................... 2
2. PREPARATION .........................................................................................................................................3
2.1 Safety Instructions ............................................................................................................................................................4
2.2 Explanations Of Symbols................................................................................................................................................ 5
3. PRODUCT INFORMATION ......................................................................................................................7
3.1 Application Scope of Products..................................................................................................................................... 8
3.2 Specification for Product Model.................................................................................................................................. 8
3.3 Overview of Productsl .....................................................................................................................................................9
3.4 Datasheet .............................................................................................................................................................................9
4. INSTRUCTIONS FOR INSTALLATION..................................................................................................13
4.1 Safety Instructions ..........................................................................................................................................................14
4.2 Pre-installation Check ...................................................................................................................................................14
4.3 Installation Method and Position ..............................................................................................................................15
4.4 Mounting Procedure ......................................................................................................................................................17
5.ELECTRICAL CONNECTION .................................................................................................................21
5.1 Safety Instruction............................................................................................................................................................ 22
5.2 Specifications for Electrical Interface ..................................................................................................................... 22
5.3 Connection of Additional Grounding...................................................................................................................... 24
5.4 AC Side Electrical Connection.................................................................................................................................... 25
5.5 DC Side Connection....................................................................................................................................................... 28
5.6 Communication Connection....................................................................................................................................... 31
5.7 Start up and Shut down Inverter.............................................................................................................................. 36
5.8 AFCI (Optional)................................................................................................................................................................ 36
6. COMMISSIONING...................................................................................................................................37
6.1 Introduction of Human-computer Interface........................................................................................................ 38
6.2 Monitoring Operation ................................................................................................................................................... 39
6.3 Setting Reactive Power Control (For Australia).................................................................................................. 44
6.4 Export Limit Setting....................................................................................................................................................... 48
6.5 Self-test (For Italy)......................................................................................................................................................... 49
7. FAULT CODE AND TROUBLESHOOTING...........................................................................................51
8. ROUTINE MAINTENANCE.....................................................................................................................55
9.RECYCLING AND DISPOSAL.................................................................................................................57
TABLE OF
CONTENTS

R6 Series Solar Inverter
1
2
SAFETY
PRECAUTIONS
1.1 Scope of Application
This User Manual describes instructions and detailed procedures for installing, operating, maintaining, and
troubleshooting of the following SAJ on-grid inverters:
R6-5K-S2-X; R6-6K-S2-X; R6-7K-S2-X; R6-8K-S2-X; R6-9K-S2-X; R6-10K-S2-X
R6-5K-S3; R6-6K-S3; R6-7K-S3; R6-8K-S3; R6-9K-S3; R6-10K-S3
1.2 Safety Instructions
DANGER
·DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.
WARNING
·WARNING indicates a hazardous situation which, if not avoided, can result in death or serious injury or moderate injury.
CAUTION
·CAUTION indicates a hazardous condition which, if not avoided, can result in minor or moderate injury.
NOTICE
·NOTICE indicates a situation that can result in potential damage, if not avoided.
1.3 Target Group
Only qualified electricians who have read and fully understood all safety regulations contained in this manual
can install, maintain and repair the inverter. Operators must be aware of the high-voltage device.
1.

R6 Series Solar Inverter
3
4
PREPARATION
2.1 Safety Instructions
DANGER
·There is possibility of danger to life due to electrical shock and high voltage.
·Do not touch non-insulated parts or cables.
·Disconnect the inverter from voltage sources and make sure it cannot be reconnected before working on the device.
·Do not disconnect the DC connector under load.
·Do not touch the live parts and cables inside the inverter during operation, it might result in burning or death.
·To prevent risk of electric shock during installation and maintenance, please make sure that all AC and DC terminals are
disconnected.
·Do not touch the surface of the inverter while the housing is wet, otherwise, it might cause electrical shock.
·Do not stay close to the inverter while there are severe weather conditions including storm, lighting, etc.
·Before opening the housing, the SAJ inverter must be disconnected from the grid and PV generator; you must wait for at least
five minutes to let the energy storage capacitors completely discharged after disconnecting from power source.
WARNING
Danger to life due to fire or explosion
·In the event of fault, do not conduct any direct action on the inverter.
·Disconnect PV array from inverter via an external disconnection device. If there is no external disconnection device present,
wait until no more DC power is applied to the inverter.
·Disconnect the AC circuit breaker, or keep it disconnect if it is tripped, and secure it against reconnection.
·Do not touch non-insulated parts or cables.
·Do not touch non-insulated parts or cables.
·The installation, service, recycling and disposal of the inverters must be performed by qualified personnel only in compliance
with national and local standards and regulations.
·Any unauthorized actions including modification of product functionality of any form may cause lethal hazard to the operator,
third parties, the units or their property. SAJ is not responsible for the loss and these warranty claims.
·The SAJ inverter must only be operated with PV generator. Do not connect any other source of energy to the SAJ inverter.
·Be sure that the PV generator and inverter are well grounded in order to protect properties and persons.
CAUTION
·The solar inverter enclosure will become hot during operation. Please do not touch the heat sink or enclosure during operation.
·Risk of damage due to improper modifications.
NOTICE
·Public utility only.
·The solar inverter is designed to feed AC power directly to the public utility power grid; do not connect AC output of the inverter
to any private AC equipment.
2.

R6 Series Solar Inverter
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6
2.2 Explanations Of Symbols
Symbol
Description
Dangerous electrical voltage
This device is directly connected to public grid, thus all work to the inverter shall only be carried out
by qualified personnel.
Danger to life due to high electrical voltage!
There might be residual currents in inverter because of large capacitors. Wait for 5 minutes before
you remove the front lid.
Notice, danger!
This is directly connected with electricity generators and public grid.
Danger of hot surface
The components inside the inverter will release a lot of heat during operation. Do not touch metal
plate housing during operating.
An error has occurred
Please go to Chapter 7 “Troubleshooting”to remedy the error.
This device shall not be disposed of in residential waste
Please go to Chapter 8 “Recycling and Disposal”for proper treatments.
CE Mark
Equipment with the CE mark fulfills the basic requirements of the Guideline Governing Low-Voltage
and Electro-magnetic Compatibility.
CQC Mark
The inverter complies with the safety instructions from China's Quality Center.

R6 Series Solar Inverter
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8
PRODUCT
INFORMATION
3.1 Application Scope of Products
R6 series product is grid-tied single phase inverter without transformer. The product converts the DC
generated by solar panels into AC which is in accordance with the requirements of public grid and send the
AC into the grid, Figure 3.1 shows the structural diagram of the typical application system of R6 inverter.
Figure 3.1
R6 series application
3.2 Specification for Product Model
R6 –XK –S3
①②③
①R6 represents for product name.
②XK represents rated power XkW of inverter, for example, 10K means 10kW.
③S means single phase; 3 represents the inverter has the function of three MPPT.
3.
PV Array AC Distribution Box Grid
Solar inverter
On-grid LoadeSolarPortalWeb App

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3.3 Overview of Productsl
Figure 3.2
Dimensions of R6-5-10K-S3
3.4 Datasheet
Model
R6-5K-S3
R6-6K-S3
R6-7K-S3
R6-8K-S3
R6-9K-S3
R6-10K-S3
DC Input
Max. PV Array Power [Wp]@STC
7500
9000
10500
12000
13500
15000
Max. DC Voltage [V]
600
MPPT Voltage Range [V]
90-550
Rated DC Voltage [V]
360
Start Voltage [V]
100
Min. DC Voltage [V]
80
Max. DC Input Current [A]
16/16/16
Max. DC Short Circuit Current [A]
19.2/19.2/19.2
No. of Strings per MPPT
1/1/1
No. of MPPT
3
DC Switch integrated
Integrated
AC Output [On-grid]
Rated AC Power [W]
4999
6000
7000
8000
9000
10000
Rated Apparent Power [VA]
4999
6000
7000
8000
9000
10000
Max. Apparent Power [VA]
4999
6600
7700
8800
9900
10000
Max. AC Current [A]
21.7
30.0
35.0
40.0
45.0
45.5
Current Inrush [A]
30
Max. AC Fault Current [A]
65
100
Max. AC Over Current Protection [A]
53
76
Rated AC Voltage
L+N+PE , 220, 230,240;180-280
Rated Output Frequency [Hz]
50, 60 / 44-55, 54-65
Power Factor [cos φ]
0.8leading～0.8lagging
Total Harmonic Distortion [THDi]
< 3%
Efficiency
Model
R6-5K-S3
R6-6K-S3
R6-7K-S3
R6-8K-S3
R6-9K-S3
R6-10K-S3
Max. Efficiency
98.2%
98.2%
98.2%
98.2%
98.2%
98.2%
Euro Efficiency
97.8%
97.8%
97.8%
97.8%
97.8%
97.8%
Protection
Overvoltage Protection
Integrated
DC Insulation Resistance Detection
Integrated
DCI Monitoring
Integrated
GFCI Monitoring
Integrated
Grid Monitoring
Integrated
AC Short Circuit Current Protection
Integrated
AC Grounding Detection
Integrated
DC Surge Protection
Type Ⅱ
AC Surge Protection
Type Ⅲ（type Ⅱoptional）
Overheat Protection
Integrated
Anti-islanding Protection
AFD
AFCI Protection
Optional
Interface
AC Connection
Quick connector
DC Connection
MC4/H4
Display
LED+APP
Communication Port
RS232+RJ45+DRM
Communication
Wi-Fi/Ethernet/4G/PLC (optional)
Load Monitoring
Whole day (optional)
General Data
Topology
Non-isolated
Consumption at Night [W]
<1
Consumption at Standby [W]
<8
Operating Temperature Range
-40℃～+60℃(>45℃derating)
Cooling Method
Natural convection
Ambient Humidity
0%～100%
Altitude
4000m (>3000m derating)
Noise [dBA]
<35
Ingress Protection
IP65
Mounting
Wall mounting
Dimensions [H*W*D] [mm]
391*532*202
Weight [kg]
17.3
17.3
18
18
18
18
Warranty [Year]
5（Standard）/10/15/20（Optional）
Applicable Standard
IEC/EN62109-1/2, EN61000-6-1/2/3/4, IEC61683, IEC60068-2, IEC62116, IEC61727, EA/MEA,VDE0126-1-1/A1,
CEI 0-21, VDE-AR-N 4105, AS/NZS4777.2, CQC NB/T 32004, G98/G99, NBR 16149, NBR 16150,
C10/11,RD1669,UNE206006, UNE206007,EN50438

R6 Series Solar Inverter
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Model
R6-5K-S2-X
R6-6K-S2-X
R6-7K-S2-X
R6-8K-S2-X
R6-9K-S2-X
R6-10K-S2-X
DC Input
Max. PV Array Power [Wp]@STC
7500
9000
10500
12000
12000
12000
Max. DC Voltage [V]
600
MPPT Voltage Range [V]
90-550
Rated DC Voltage [V]
360
Start Voltage [V]
100
Min. DC Voltage [V]
80
Max. DC Input Current [A]
16/16
Max. DC Short Circuit Current [A]
19.2/19.2
No. of Strings per MPPT
1/1
No. of MPPT
2
DC Switch integrated
Integrated
AC Output [On-grid]
Rated AC Power [W]
4999
6000
7000
8000
9000
10000
Rated Apparent Power [VA]
4999
6000
7000
8000
9000
10000
Max. Apparent Power [VA]
4999
6600
7700
8800
9900
10000
Max. AC Current [A]
21.7
30.0
35.0
40.0
45.0
45.5
Current Inrush [A]
30
Max. AC Fault Current [A]
65
100
Max. AC Over Current Protection [A]
53
76
Rated AC Voltage
L+N+PE , 220, 230,240;180-280
Rated Output Frequency [Hz]
50, 60 / 44-55, 54-65
Power Factor [cos φ]
0.8leading～0.8lagging
Total Harmonic Distortion [THDi]
< 3%
Efficiency
Max. Efficiency
98.2%
98.2%
98.2%
98.2%
98.2%
98.2%
Euro Efficiency
97.8%
97.8%
97.8%
97.8%
97.8%
97.8%
Protection
Overvoltage Protection
Integrated
DC Insulation Resistance Detection
Integrated
DCI Monitoring
Integrated
GFCI Monitoring
Integrated
Grid Monitoring
Integrated
AC Short Circuit Current Protection
Integrated
AC Grounding Detection
Integrated
Model
R6-5K-S2-X
R6-6K-S2-X
R6-7K-S2-X
R6-8K-S2-X
R6-9K-S2-X
R6-10K-S2-X
DC Surge Protection
Type Ⅱ
AC Surge Protection
Type Ⅲ（type Ⅱoptional）
Overheat Protection
Integrated
Anti-islanding Protection
AFD
AFCI Protection
Optional
Interface
AC Connection
Quick connector
DC Connection
MC4/H4
Display
LED+APP
Communication Port
RS232+RJ45+DRM
Communication
Wi-Fi/Ethernet/4G/PLC (optional)
Load Monitoring
Whole day (optional)
General Data
Topology
Non-isolated
Consumption at Night [W]
<1
Consumption at Standby [W]
<8
Operating Temperature Range
-40℃～+60℃(>45℃derating)
Cooling Method
Natural convection
Ambient Humidity
0%～100%
Altitude
4000m (>3000m derating)
Noise [dBA]
<35
Ingress Protection
IP65
Mounting
Wall mounting
Dimensions [H*W*D] [mm]
391*532*202
Weight [kg]
16.5
16.5
17.3
17.3
17.3
17.3
Warranty [Year]
5（Standard）/10/15/20（Optional）
Applicable Standard
IEC/EN62109-1/2, EN61000-6-1/2/3/4, IEC61683, IEC60068-2, IEC62116, IEC61727, EA/MEA,VDE0126-1-1/A1,
CEI 0-21, VDE-AR-N 4105, AS/NZS4777.2, CQC NB/T 32004, G98/G99, NBR 16149, NBR 16150,
C10/11,RD1669,UNE206006, UNE206007,EN50438

R6 Series Solar Inverter
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INSTRUCTIONS FOR
INSTALLATION
4.1 Safety Instructions
DANGER
·Dangerous to life due to potential fire or electricity shock.
·Do not install the inverter near any inflammable or explosive items.
·This inverter will be directly connected with HIGH VOLTAGE power generation device; the installation must be performed
by qualified personnel only in compliance with national and local standards and regulations.
NOTICE
·This equipment meets the pollution degree II.
·Inappropriate installation environment may jeopardize the life span of the inverter.
·Installation directly exposed under intensive sunlight is not recommended.
·The installation site must be well ventilated.
4.2 Pre-installation Check
4.2.1 Check the Package
Although SAJ’s inverters have thoroughly tested and checked before delivery, it is uncertain that the inverters
may suffer damages during transportation. Please check the package for any obvious signs of damage, and if
such evidence is present, do not open the package and contact your dealer as soon as possible.
4.

R6 Series Solar Inverter
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16
4.2.2 Scope of Delivery
Please contact after sales if there is missing or damaged components.
Inverter*1
Wall mounting bracket*1
Documents
Communication module*1
（Optional）
Screw & expansion bolt &
washer*3
M5*12 screw*1
AC connector set*1
PV connector
R6-5-10K-S3*6
R6-5-10K-S2-X*4
The documents include the user manual, quick installation guide and packaging list.
4.3 Installation Method and Position
4.3.1 Installation Position and Clearance
DO NOT expose the inverter to direct solar irradiation as this could cause power derating due to overheating.
The ambient temperature should be between -40 °C～+60°C (-40°F～140°F) to ensure optimum operation.
Choose locations with sufficient air exchange. Ensure additional ventilation, when necessary.
DO NOT install the inverter near any inflammable and explosive items.
To make sure the installation spot is suitably ventilated, if multiple SAJ on-grid solar inverters are installed at
the same area, the safety clearance should be followed for proper ventilation conditions.
Figure 4.1
Installation clearance
4.3.2 Mounting Method
Figure 4.2
Mounting method
①The equipment employs natural convection cooling, and it can be installed indoor or outdoor.
②Mount vertically or tilted backwards by max. 15°. Never install the inverter tilted forwards, sideways,
30CM 50CM
30CM
50CM
30CM
Keep away from sunlight Keep dry Keep it clear of snow Sun Rain Accmulated snow
15°

R6 Series Solar Inverter
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18
horizontally or upside down.
③Considering convenience for maintenance, please install the equipment at eye level.
④When mounting the inverter, please consider the solidity of wall for inverter, including accessories, make
sure the wall has enough strength to hold the screws and bear the weight of products. Please ensure the
mounting bracket mounted tightly.
Installation Environment Requirements
•The installation environment must be free of inflammable or explosive materials.
•Install the device away from heat source.
•Do not install the device at a place where the temperature changes extremely.
•Keep the device away from children.
•Do not install the device at daily working or living arears, including but not limited to the following areas:
bedroom, lounge, living room, study, toilet, bathroom, theater and attic.
•When installing the device at the garage, please keep it away from drive way.
•Keep the device from water sources such as taps, sewer pipes and sprinklers to prevent water seepage.
•The product is to be installed in a high traffic area where the fault is likely to be seen.
Note: When installing outdoors, the height of the device from the ground should be considered to prevent the
device from soaking in water. The specific height is determined by the site environment.
4.4 Mounting Procedure
4.4.1 Installation Tools
Installation tools include but are not limited to the following recommended ones. Please use other auxiliary
tools on site if necessary.
Marker Measuring tape Utility knife
Multimeter
Measurement
range: 1100Vdc Wrist strap
Protective gloves Dust mask Earplugs Goggles Insulated shoes
Vacuum cleaner Heat shrink tubing Heat gun Hammer drill Drill
bit: Φ10 Rubber mallet
Electric screwdriver
tool bit: M4 Phillips screwdriver
Specification: M4 Wire stripper Hydraulic plier Crimping tool crimping
range: 2.5-6mm²
Wrenchfor MC4
terminal Wire clipper RJ45 crimping tool Flat-blades
crewdriver M2 Torx screwdriver TX30
Socket wrench open end:
10mm (forM6 bolts)
13mm (forM8bolts)
16mm (forM10bolts)

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4.4.2 Mark the Positions of the Drill Holes of the Mounting Bracket
The mounting position should be marked as below.
Figure 4.3
Dimensions of mounting bracket
(Dimensions in mm)
4.4.3 Drill Holes and Place the Expansion Tubes
Follow the given guides, drill 3 holes in the wall (in conformity with position marked in Figure 4.4), and then
place expansion tubes in the holes using a rubber mallet.
Figure 4.4
Drill holes’dimensions
(Dimensions in mm)
4.4.4 Mount the Screws and the Mounting Bracket
The brackets should be mounted in the mounting position by screws as below.
Figure 4.5
Mount the mounting bracket
4.4.5 Mount the Screws and the Mounting Bracket
Carefully mount the inverter to the mounting bracket. Make sure that the rear part of the equipment is closely
mounted to the mounting bracket.
Figure 4.6
Mount inverter
342
30
R5
120
120
12
15
3-Ф8
120 120
3-Ф8

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ELECTRICAL
CONNECTION
5.1 Safety Instruction
Electrical connection must only be operated by professional technicians. Please keep in mind that the inverter
is a bi-power supply equipment. Before connection, necessary protective equipment must be employed by
technicians, including insulating gloves, insulating shoes and safety helmet.
DANGER
Dangerous to life due to potential fire or electricity shock.
·The PV panel string will produce lethal high voltage when exposed to sunlight.
·Disconnect DC and AC circuit breakers before starting electrical connections.
·Ensure all the cables have no voltage before conducting cable connection
WARNING
·Any improper operations during cable connection can cause device damage or personal injury.
·All cables must be undamaged, firmly attached, properly insulated and adequately dimensioned.
NOTICE
·When power-on, the equipment should be in conformity with national rules and regulations.
·The direct connection between the inverter and high voltage power systems must be operated by qualified technicians in
accordance with local and national power grid standards and regulations.
5.2 Specifications for Electrical Interface
Figure 5.1
Electrical terminals of R6-5~10K-S2-X
5.
A B C D EF G

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Figure 5.2
Electrical terminals of R6-5~10K-S3
Item
Name
A
DC Switch
B
DC Input
C
Relief Valve
D
RS232 Communication (Wi-Fi /4G)
E
RS485 Communication + DRM
F
AC Output
G
Ground Connection
Specifications for interface
5.3 Connection of Additional Grounding
WARNING
·The ground connection of this additional grounding connection cannot replace the AC cable PE terminal connection.
·Connect this additional grounding cable before AC cable connection, DC cable connection and communication cable
connection.
Note: The additional cable and OT/DT terminal should be prepared by user themselves.
Figure 5.3
Preparing additional grounding cable
1. Heat shrink tubing 2. OT/DT terminal
Note: Recommended conductor
cross-sectional area of additional
grounding cable is 6-16mm².
Remove the screw of grounding terminal
and secure the additional grounding cable
by insert a screw into the screw hole in the
OT/DT terminal.
Figure 5.3
Preparing additional grounding cable
A B C D EF G
12

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5.4 AC Side Electrical Connection
Conductor cross-sectional area of cables（mm²）
External cable diameter（mm）
Conductor material
Scope
Recommended value
14~20
Copper
6~16
10
Table 5.2
Recommended AC cable specification
Note: If the grid-connection distance is too far, please select an AC cable with larger diameter as per the
actual condition. Mutli-core cable is recommended if cross-sectional area is less than 10mm², otherwise
single-core cable is recommended. Copper core cable is recommended.
The higher grid impedance of the AC cable makes it easier to disconnect from the grid due to excessive
voltage at the feed-in point. The maximum cable lengths depend on the conductor cross-section as follows：
Conductor
cross-sectional
area （mm²）
Maximum cable length (m)
R6-5/6K-S2-X；R6-5/6K-S3
R6-7/8K-S2-X；R6-7/8K-S3
R6-9/10K-S2-X；R6-9/10K-S3
8
15
11
9
10
18
14
11
Figure 5.5
Connecting AC cable
1.Strip off 16mm of wire insulation skin and 46mm of AC cable insulation skin
2.Insert the cable through waterproof cable gland and housing
3.Insert the conductors into the corresponding ports and fix it with screws
4.Secure the cable gland by fastening sealing nut
5.Plug the AC connector into the AC connector port of inverte
16mm
46mm
1
2
3
4
5

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5.4.1 Earth Fault Alarm
This inverter complies with IEC 62109-2 clause 13.9 for earth fault alarm monitoring. If an Earth Fault Alarm
occurs, the ring light will be lit up in red and error code <31> will be displayed on LED panel 1 until the error
being solved and inverter functioning properly.
5.4.2 External AC Circuit Breaker and Residual Current Device
Please install a two pole circuit breaker to ensure the inverter is able to disconnect from grid safely. The
integrated leakage current detector of inverter is able to detect the real time external current leakage. When a
leakage current detected exceeds the limitation, the inverter will be disconnected from grid quickly.
The inverter does not require an external residual current device, as it has integrated with a RCMU. If local
regulations require the application of external residual current device, either type A or type B RCD is
compatible with the inverter. The action current of external residual current device should be 300mA.
Inverter type
Recommended breaker specification
R6-5K-S2-X,R6-5K-S3
32A
R6-6K-S2-X,R6-6K-S3
40A
R6-7-8K-S2-X,R6-7-8K-S3
50A
R6-9-10K-S2-X,R6-9-10K-S3
63A
Notice: Do not connect multiple inverters to one AC circuit breaker.
Table 5.3
Recommended circuit breaker specification
5.4.3 Multiple Inverter Combinations
The inverter should not be installed in multiple
phase combinations.
5.5 DC Side Connection
WARNING
·Make sure the PV array is well insulated to ground before connecting it to the inverter.
Conductor cross-sectional area of cables（mm²）
External cable
diameter（mm）
Conductor material
Scope
Recommended value
6~9
Outdoor multi-core copper wire
cable, complying with 600Vdc
4~6
5.26
Table5.4
Recommended specifications of DC cable
5.5.1 PV Connector Assembly
WARNING
Dangerous to life due to electric shock when live components or DC cables are touched.
·The PV panel string will produce lethal high voltage when exposed to sunlight. Touching live DC cables results in death or
lethal injures.
·DO NOT touch non-insulated parts or cables
·Disconnect inverter from voltage sources.
·DO NOT disconnect DC connectors under load.
·Wear suitable personal protective equipment for all work.
DC connector is made up of positive connector and the negative connector
Figure 5.6
Positive connector
& Negative connector
NOTICE
·Please place the connector separately after unpacking in order to avoid confusion for connection of cables.
·Please connect the positive connector to the positive side of the solar panels, and connect the negative connector to the
negative side of the solar side. Be sure to connect them in right position.
Inverter
1 Phase
Inverter
1 Phase
Inverter
1 Phase
Test Circuit
Connection
3 Phase
A
B
C
N

R6 Series Solar Inverter
29
30
Connecting Procedures:
1. Loosen the lock screws on positive and negative connector.
2. Strip the insulation of the positive and negative cables with 8-10mm length.
positive cable
negative cable
Figure 5.8
Striping off the insulation skin of cables
3. Assembly the positive and negative cables with corresponding crimping pliers.
Figure 5.9
Inserting cables to lock screws
4. Insert the positive and negative cable into positive and negative connector. Gently pull the cables backward
to ensure firm connection.
Figure 5.10
Inserting crimped cables to connectors
5.Fasten the lock screws on positive and negative connectors.
Figure 5.11
Securing the connectors
6.Make sure the DC switch is at OFF position
Figure 5.12
DC switch
7.Connect the positive and negative connectors into positive and negative DC input terminals of the inverter,
a “click”should be heard or felt when the contact cable assembly is seated correctly.
Figure 5.13
Plug in PV connectors
PV+
PV-
PV+
-
+PV-
-
+

R6 Series Solar Inverter
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32
5.6 Communication Connection
5.6.1 RS485 Communication
R6 inverter is standardly equipped with a RS485 interface, a DRM interface and a RS232 interface.
Figure5.14
RS485 pin and DRM pin
Pin Number
Wire color
Function1
1
White-orange
NC
2
Orange
GND_W
3
White-green
+5V_W
4
Blue
NC
5
White-blue
NC
6
Green
NC
7
White-brown
RS485-A
8
Brown
RS485-B
Table 5.5
RS485 pin port definition
To comply with Australian and New Zealand safety requirements, the DRMs terminals should be connected.
DRM0 is supported. A RJ45 plug is being used as the inverter DRED connection.
Pin Number
Name
1
NC
2
NC
3
NC
4
NC
5
REF GEN
6
COM LOAD
7
NC
8
NC
Table 5.6
Demand Response Modes (DRM)
Mode
Corresponding pins
Requirement
DRM0
5 & 6
The inverter is on standby mode
Table 5.7
DRM0 mode
Figure5.15
RS232 pin
Pin Number
Description
Function
1
+5 V
Power supply
2
RS-232 TX
Send data
3
RS-232 RX
Receive data
4
GND
Ground wire
Table 5.8
USB pin port definition
1 2 3 4 5 6 7 8
1 2 3 4
USB

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5.6.2 RS485 Communication Connection
Proceed as follow to connect the RS485 cables to the inverter
1. (Optional) The RS485 cable is prepared by user. It is recommended to strip the RS485 cable and Ethernet
wire insulation. Insert the stripped Ethernet wires in correct order into the RJ45 plug (please refer to fig 5.14
and table 5.5 for order) and crimp it with a crimper.
Figure 5.16
RJ45 plug
2.Insert the cable through the sealing nut of cable gland
Figure 5.17
Inserting cables
3.Install the rubber seal onto cables
Figure 5.18
Inserting rubber seal
4.Insert the RJ45 cables into the corresponding ports
Figure 5.19
Inserting RJ45 cables
5.Secure the cable gland by rotating sealing nut and plug the cable gland to communication
port of inverter
Figure 5.20
Securing sealing nut
1
8