SAJ R5-3.6K-S2 User manual

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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.
Building e-Energy Management Solution Provider

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Content
PREFACE ........................................... - 1 -
CHAPTER 1 SAFETY PRECAUTIONS ................. - 4 -
1.1 SCOPE OF APPLICATION ..................................... - 4-
1.2 SAFETY INSTRUCTIONS ..................................... - 4-
1.3 TARGET GROUP ........................................... - 5-
CHAPTER 2 PREPARATION ......................... - 5 -
2.1 SAFETY INSTRUCTIONS ..................................... - 5-
2.2 EXPLANATIONS OF SYMBOLS ................................. - 7-
CHAPTER 3 PRODUCT INFORMATION ............... - 8 -
3.1APPLICATION SCOPE OF PRODUCTS ............................ - 8-
3.2 SPECIFICATION FOR PRODUCT MODEL .......................... - 9-
3.3 OVERVIEW OF PRODUCTS.................................... - 9-
3.4 DATASHEET ............................................. - 10 -
CHAPTER 4 INSTRUCTIONS FOR INSTALLATION.... - 14 -
4.1 SAFETY INSTRUCTIONS .................................... - 14 -
4.2 PRE-INSTALLATION CHECK ................................. - 14 -
4.3 THE DETERMINATION OF THE INSTALLATION METHOD AND POSITION . - 15 -
4.4 MOUNTING PROCEDURE.................................... - 16 -
CHAPTER 5 ELECTRICAL CONNECTION............ - 20 -
5.1 SAFETY INSTRUCTION FOR HOT-LINE JOB ...................... - 20 -
5.2 SPECIFICATIONS FOR ELECTRICAL INTERFACE ................... - 21 -
5.3AC CONNECTION ......................................... - 23 -

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5.4 DC SIDE CONNECTION..................................... - 26 -
5.5 COMMUNICATION CONNECTION.............................. - 29 -
CHAPTER 6 DEBUGGING INSTRUCTIONS ........... - 31 -
6.1 INTRODUCTION OF HUMAN-COMPUTER INTERFACE ............... - 31 -
6.2 MONITORING OPERATION................................... - 32 -
CHAPTER 7 FAULT CODE AND TROUBLESHOOTING. - 40 -
CHAPTER 8 RECYCLING AND DISPOSAL............ - 43 -
CHAPTER 9 CONTACT SAJ......................... - 44 -
SAJ WARRANTY POLICY IN AUSTRALIA ........... - 44 -
WARRANTY CARD ................................. - 49 -

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Chapter 1 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:
R5-3K-S2；R5-3.6K-S2；R5-4K-S2；R5-5K-S2；R5-6K-S2；R5-7K-S2；
R5-8K-S2
Please keep this manual all time available in case of emergency.
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.

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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.
Chapter 2 Preparation
2.1 Safety Instructions
DANGER
·There is possibility of dying due to electrical shock and high voltage.
·Do not touch the operating component of the inverter, 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 plugged out.
·Do not touch the surface of the inverter while the housing is wet, otherwise, this may 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
·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.

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CAUTION
·The solar inverter will become hot during operation. Please do not touch the heat sink or
peripheral surface during or shortly after 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.

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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 9 “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.
Without Transformer
This inverter does not use transformer for the isolation function.
CE Mark
With CE mark & the inverter 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.
No unauthorized operations or modifications
Any unauthorized operations or modifications are strictly forbidden, if any
defect or damage (device/person) occurs, SAJ shall not take any responsibility
for it.

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Chapter 3 Product Information
3.1 Application Scope of Products
R5-XK-SX products are on-grid single phase inverters without transformers, and the
inverters are important components of on-grid solar power systems.
The R5 inverter 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 R5
inverter.
Figure3.1 R5 series application
Name
Description
Remarks
A
Solar panels
Monocrystalline or polycrystalline silicon, and thin-film PV
modules with II protection and need no ground connection
B
Inverters
R5-3K/3.6K/4K/5K/6K/7K/8K-S2
C
Metering
equipment
Standard metering tool for measuring the output electric power
of inverters.
D
Power grid
TT, TN-C, TN-S, TN-C-S

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3.2 Specification for Product Model
R5 –XK –S2
①②③
①R5 represents for product name.
②XK represents rated power XkW of inverter, for example 3K means 3kW.
③S means single phase; 2 represents that the inverter has the function of dual
MPPT.
3.3 Overview of Products
The dimensions of R5 series products are shown in Figure 3.2 and Figure 3.3.
Figure 3.2 Dimensions of R5-3K/3.6K/4K/5K/6K-S2
Figure 3.3 Dimensions of R5-7K/8K-S2

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3.4 Datasheet
R5-3K/3.6K/4K/5K/6K-S2
Type
R5-3K-S2
R5-3.6K-S2
R5-4K-S2
R5-5K-S2
R5-6K-S2
Input (DC)
Max. PV Array Power [Wp]@STC
3990
4788
5320
6650
7980
Max. DC Voltage [V]
600
MPPT Voltage Range [V]
90-550
Nominal DC Voltage [V]
360
Start Voltage [V]
100
Min. DC Voltage [V]
80
Max. DC Input Current [A]
12.5/12.5
Max. DC Short Current [A]
15/15
Number of DC Connection Sets per MPPT
1/1
Number of MPPT
2
Backfeed Current [A]
0
Output (AC)
Rated AC Power [W]
3000
3680
4000
4999
6000
Max. AC Power [VA]
3300
3680
4400
4999
6000
Rated AC Current [A]
13.1
16
17.4
21.7
26.1
Max. AC Current [A]
14.4
16
19.2
21.7
26.1
Current Inrush [A]
50
Max. AC Fault Current [A]
28.8
32
38.4
43.4
52.2
Max. AC Over Current Protection [A]
25.92
28.8
34.56
39.06
46.98
Nominal AC Voltage/Range [V]
220,230,240/180-280
Grid Frequency/ Range [Hz]
50,60/45-55,55-65
Power Factor [cos φ]
0.8 leading~0.8 lagging
Total Harmonic Distortion [THDi]
< 2%
Feed-in
L+N+PE
Efficiency
Max. Efficiency
97.8%
98.0%
98.0%
98.1%
98.2%
Euro Efficiency
97.2%
97.5%
97.5%
97.6%
97.6%
MPPT Accuracy
>99.5%
Protection
Internal Over-voltage Protection
Integrated

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DC Insulation Monitoring
Integrated
DCI Monitoring
Integrated
GFCI Monitoring
Integrated
Grid Monitoring
Integrated
AC Short Circuit Current Protection
Integrated
AC grounding detection
Integrated
DC Surge Protection
Integrated
AC Surge Protection
Integrated
Thermal Protection
Integrated
Anti-island protection monitoring
AFD
Interface
AC Connection
Plug-in connector
DC Connection
MC4
Human Machine Interface
LED+(Bluetooth/Wi-Fi+APP)
Communication Port
RS232(USB)+RS485(RJ45) +DRM(RJ45)
Communication Mode
Wi-Fi/GPRS/4G(Optional)
General Data
Topology
Transformerless
Consumption at Night [W]
<0.2
Consumption at Standby [W]
6
Operating Temperature Range
-40℃～+60℃[45°C to 60°C with derating]
Cooling Method
Natural Convection
Ambient Humidity
0%～100% Non-condensing
Altitude
4000m(>3000m power derating)
Noise [dBA]
<25
Ingress Protection
IP65
Mounting
Rear Panel
Dimensions[H*W*D] [mm]
389*367*143
Weight [kg]
12.2
Standard Warranty [Year]
5(standard)/10/15/20/25(Optional)
Applicable Standard
CQC NB/T 32004,EN62109-1/2,EN61000-6-1/2/3/4,
EN50438,EN50549,C10/C11,IEC62116,IEC61727,RD1699,
G98,G99,UNE206006,UNE206007-1,CEI0-21,AS/NZS4777.2

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R5-7K/8K-S2
Type
R5-7K-S2
R5-8K-S2
Input (DC)
Max. PV Array Power [Wp]@STC
9310
10640
Max. DC Voltage [V]
600
MPPT Voltage Range [V]
90-550
Nominal DC Voltage[V]
360
Start Voltage [V]
100
Min. DC Voltage [V]
80
Max. DC Input Current [A]
25/12.5
Max. DC Short Current [A]
30/15
Number of DC Connection Sets per MPPT
2/1
Number of MPPT
2
Backfeed Current [A]
0
Output (AC)
Rated AC Power [W]
7000
8000
Max. AC Power [VA]
7700
8000
Rated AC Current [A]@230Vac
30.5
34.8
Max. AC Current [A]
33.5
34.8
Current Inrush [A]
50
Max. AC Fault Current [A]
67
69.6
Max. AC Over Current Protection [A]
60.3
62.64
Nominal AC Voltage/ Range [V]
220,230,240/180-280
Grid Frequency/ Range [Hz]
50，60/45-55，55-65
Power Factor [cos φ]
0.8 leading~0.8 lagging
Total Harmonic Distortion [THDi]
< 2%
Feed-in
L+N+PE
Efficiency
Max. Efficiency
98.2%
98.3%
Euro Efficiency
97.7%
97.8%
MPPT Accuracy
>99.5%
Protection
Internal Over-voltage Protection
Integrated
DC Insulation Monitoring
Integrated
DCI Monitoring
Integrated

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GFCI Monitoring
Integrated
Grid Monitoring
Integrated
AC Short Circuit Current Protection
Integrated
AC grounding detection
Integrated
DC Surge Protection
Integrated
AC Surge Protection
Integrated
Thermal Protection
Integrated
Anti-island Protection Monitoring
AFD
Interface
AC Connection
Terminal Block
DC Connection
MC4
Human Machine Interface
LED+(Bluetooth/Wi-Fi+APP)
Communication Port
RS232(USB)+RS485(RJ45) +DRM(RJ45)
Communication Mode
Wi-Fi/GPRS/4G(Optional)
General Data
Topology
Transformerless
Consumption at Night [W]
<0.2
Consumption at Standby [W]
6
Operating Temperature Range
-40℃～+60℃[45°C to 60°C with derating]
Cooling Method
Natural Convection
Ambient Humidity
0-100% Non-condensing
Altitude
4000m(>3000m power derating)
Noise [dBA]
<25
Ingress Protection
IP65
Mounting
Rear Panel
Dimensions [H*W*D][mm]
429*418*177
Weight [kg]
18
Standard Warranty [Year]
5(standard)/10/15/20/25(Optional)
Applicable Standard
CQC NB/T 32004,EN62109-1/2,EN61000-6-1/2/3/4,
EN50438,EN50549,C10/C11,IEC62116,IEC61727,RD1699,
G98,G99,UNE206006,UNE206007-1,CEI0-21,AS/NZS4777.2
Note: 1.The above parameters might be slightly modified according to different grid codes.
2.If you need more information about our product certifications, please contact our sales.

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Chapter 4 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 or the harmonized 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 surpassed stringent testing and are checked before
leaving factory, it is still possible 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.
4.2.2 Check the Assembly Parts
Please refer to the packing list inside the package container.

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4.3 The Determination of the Installation Method and Position
4.3.1 Mounting Method
Figure 4.1 Mounting method
①The equipment employs natural convection cooling method, and it can be
installed indoor or outdoor.
②Please install the equipment under the guidance of Figure 4.1. Vertical
installation on floor level is recommended. Mount vertically or tilted backwards by
max. 15°. Never install the inverter tilted forwards, sideways, horizontally or
upside down.
③Considering convenience for maintenance, please install the equipment at a
position in parallel with line of sight.
④When mounting the inverter, please consider the solidity of wall for inverter,
including accessories. Please ensure the Rear Panel tightly.
Before installation, make sure that the wall has enough strength to hold the screws
and bear the weight of the equipment.Please make sure the equipment is installed
properly.
4.3.2 Installation Position
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, if necessary.

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To make sure the installation spot is suitably ventilated, if multiple SAJ on-grid olar
inverters are installed in the same area, the following safety clearance in Figure 4.2
shall be followed for proper ventilation conditions.
30CM
50CM50CM30CM
30CM
4.2 Installation position
4.4 Mounting Procedure
4.4.1 Mark the Positions of the Drill Holes of the Rear Panel
The mounting position should be marked as shown in Figure 4.3 & Figure 4.4.
Figure 4.3 Dimensions of rear panel of R5-3K/3.6K/4K/5K/6K-S2

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Figure 4.4 Dimensions of rear panel of R5-7K/8K-S2
4.4.2 Drill Holes and Place the Expansion Tubes
According to the guides, drill 3 holes in the wall (in conformity with position
marked in Figure 4.5), and then place expansion tubes in the holes using a rubber
mallet.
Figure 4.5 Drill holes’ dimensions of R5-3K/3.6K/4K/5K/6K/7K/8K-S2
4.4.3 Mount the Screws and the Rear Panel
The panels should be mounted in the mounting position by screws as shown in
Figure 4.6.

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Figure 4.6 Mount the rear panel of R5-3K/3.6K/4K/5K/6K/7K/8K-S2
4.4.4 Mount the Inverter
Carefully mount the inverter to the rear panel as shown in Figure 4.7 and 4.8,
Make sure that the rear part of the equipment is closely mounted to the rear
panel.
Figure 4.7 Mount R5-3K/3.6K/4K/5K/6K/7K/8K-S2 inverter

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Fig. 4.8 Fasten the inverter and hanging panel with screws
4.4.5 Install Anti-theft Lock
As shown in figure 4.9, anti-theft lock could be added to the inverter and hanging
panel. Diameter of the lock hole is φ6.0mm and anti-theft lock with a φ5.0mm
diameter of lock hook shall be recommended.
Users shall prepare anti-theft lock by themselves.
Figure 4.9 Install anti-theft lock