SAJ H2 Series User manual

H2 Series
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Add: SAJ Innovation Park,No.9, Lizhishan Road,Science City, Guangzhou High-tech Zone , Guangdong, P.R.China
GUANGZHOU SANJING ELECTRIC CO.,LTD
H2 Series
SAJ HYBRID SOLAR INVERTER
USER MANUAL
H2-5~10K-S3
V0.2

H2 Series
Preface
Thank you for choosing SAJ products. 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 and greener world.
Please check for the latest version at www.saj-electric.com.
Guangzhou Sanjing Electric Co., Ltd.

H2 Series
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 Product ...............................................................................................................................................9
3.4 Terminals Description .............................................................................................................................................9
3.5 Datasheet................................................................................................................................................................ 11
4. INSTRUCTIONS FOR INSTALLATION..................................................................................................13
4.1 Unpacking and Inspection.................................................................................................................................. 14
4.1.1 Checking the Package ............................................................................................................... 14
4.1.2 Scope of Delivery........................................................................................................................ 14
4.2 Installation Method and Position ......................................................................................................................15
4.2.1 Installation Position and Clearance........................................................................................15
4.2.2 Mounting Method .......................................................................................................................16
4.3 Mounting Procedure.............................................................................................................................................17
4.3.1 Installation Tools..........................................................................................................................17
4.3.2 Mounting Procedure...................................................................................................................18
5. ELECTRICAL CONNECTION .................................................................................................................21
5.1 Additional Grounding Cable ...............................................................................................................................22
5.2 AC Grid Wire and Backup Output Connection..............................................................................................23
5.2.1 Multiple Inverter Combinations...............................................................................................25
5.3 PV Side Connection...............................................................................................................................................26
5.3.1 PV Connector Assembly ............................................................................................................27
5.4 Communication Connection ...............................................................................................................................30
5.5 Connection Battery COMM Cable.....................................................................................................................31
5.6 Connecting Battery Power Cable......................................................................................................................32
5.7 Battery Connection .............................................................................................................................................32
5.8 System Connection ...............................................................................................................................................35
5.9 System Connection Diagram..............................................................................................................................37
5.10 AFCI (Optional) ....................................................................................................................................................37
6. COMMISSIONING...................................................................................................................................39
6.1 Start Up and Shut Down the Energy Storage System ................................................................................40
6.1.1 Start Up..........................................................................................................................................40
6.1.2 Shut Down.....................................................................................................................................40
6.2 Introduction of Human-computer Interface..................................................................................................40
6.3 Commissioning.......................................................................................................................................................42
6.4 eSAJ APP Connection...........................................................................................................................................42
6.4.1 Account Login ..............................................................................................................................42
6.4.2 Local Connection.........................................................................................................................44
6.4.3 Inverter Setting Review .............................................................................................................46
TABLE OF
CONTENTS

H2 Series
6.5 Working Modes ..................................................................................................................................................... 47
6.5.1 Selecting Working Modes Procedures.................................................................................. 47
6.5.2 Working Modes Instruction...................................................................................................... 47
6.6 Export Limit Setting ............................................................................................................................................. 48
6.6.1 APP Setting................................................................................................................................... 49
6.7 Self-test (For Italy)................................................................................................................................................ 50
6.8 Setting Reactive Power Control (For Australia)............................................................................................ 52
6.8.1 Setup Fixed Power Factor Mode ............................................................................................ 52
6.8.2 Setup V-Watt and Volt-Var Mode......................................................................................... 53
7. TRANSPORTATION and DISPOSAL ....................................................................................................57
7.1 Transportation ....................................................................................................................................................... 58
7.2 Recycling and Disposal........................................................................................................................................ 58
8. ROUTINE MAINTENANCE.....................................................................................................................59
9. TROUBLESHOOTING and WARRANTY ..............................................................................................61

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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 products:
H2-5K-S3; H2-6K-S3; H2-7K-S3; H2-8K-S3; H2-10K-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 in this manual can
perform installation and maintenance. Operators must be aware of the high-voltage device.
1.

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4
PREPARATION
2.1 Safety Instructions
For safety, be sure to read all the safety instructions carefully prior to any works, and please observe the
appropriate rules and regulations of the country or region where you installed the energy storage system.
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 equipment while the housing is wet, otherwise, it might cause electrical shock.
· Do not stay close to the equipment 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.
CAUTION
·The 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
·The 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.

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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 battery shall only be carried out
by qualified personnel.
No open flames
Do not place or install near flammable or explosive materials.
Danger of hot surface
The components inside the battery will release a lot of heat during operation. Do not touch metal
plate housing during operating.
Attention
Install the product out of reach of children
An error has occurred
Please go to Chapter 7 “Troubleshooting”to remedy the error.
This device shall NOT be disposed of in residential waste
This battery module shall NOT be disposed of in residential waste
CE Mark
Equipment with the CE mark fulfills the requirements of the Low Voltage Directive and Electro
Magnetic Compatibility.
Recyclable

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PRODUCT
INFORMATION
3.1 Application Scope of Products
H2 series is a hybrid photovoltaic inverter and it is applicable to both on-grid and off-grid solar systems. The
energy generated by PV system will be fed to loads first, and then the surplus energy can charge the battery
for later use, if there is still excess more energy, it will be exported to the grid. H2 inverter can significantly
improve the self-consumption rate of solar energy and lower the dependency on grid.
3.2 Specification for Product Model
H2 –XK –S3
①②③
①H2 represents for product name.
②XK represents rated energy XkW of inverter, for example, 5K means 5kW.
③S3 means single phase with 3MPPT
3.

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3.3 Overview of Product
Figure 3.1
Dimensions of inverter
3.4 Terminals Description
Figure 3.2
Electrical interface of H2 Inverter
Code
Name
A
DC Switch
B
DC Input
C
DC Input
D
DC Input
E
Battery Input
F
BMS/ CAN/ EMS/ METER/ DRM
G
CT/ Inverter Parallel port
H
Release Valve
I
4G/ Wi-Fi
J
Ground Connection
K
Grid
L
Backup
Table 3.1
Terminals description

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3.5 Datasheet
Model
H2-5K-S3
H2-6K-S3
H2-7K-S3
H2-8K-S3
H2-10K-S3
DC Input
Max. PV Array Power [Wp]@STC
7500
9000
10500
12000
15000
Max. DC Voltage [V]
600
MPPT Voltage Range [V]
90~550
Rated DC Voltage [V]
360
Start Voltage [V]
100
Max. DC Input Current [A]
16/16/16
Max. DC Short Circuit Current [A]
19.2/19.2/19.2
No. of MPPT
3
Battery Parameters
Battery Type
LiFePO4
Battery Voltage Range [V]
85~450
Max. Charging/Discharging Current [A]
50/50
AC Output [On-grid]
Rated AC Power [W]
5000
6000
7000
8000
10000
Max. Apparent Power [VA]
5500
6600
7700
8800
10000
Rated Current [A]
21.7
26.1
30.4
34.8
43.5
Max. AC Output Current to Utility Grid [A]
25
30
35
40
45.5
Current Inrush[A]
150
Max. AC Fault Current[A]
130
Max. AC Over Current Protection[A]
63
75
88
100
100
Rated AC Voltage/Range [V]
L+N+PE, 220, 230, 240/180~280
Rated Output Frequency/Range [Hz]
50,60/45~55,55~65
Power Factor [cos φ]
0.8 leading～0.8 lagging
Total Harmonic Distortion [THDi]
<3%
AC Input [On-grid]
Rated AC Voltage/Range [V]
L+N+PE, 220, 230, 240/180~280
Rated Input Frequency [Hz]
50,60
Max. Input Current [A]@230Vac
43.5
52.2
60.9
69.6
69.6
AC Output [Back-up]
Max. Output Power [VA]
5000
6000
7000
8000
10000
Max. Output Current [A]
22.7
27.3
31.8
36.4
45.5
Model
H2-5K-S3
H2-6K-S3
H2-7K-S3
H2-8K-S3
H2-10K-S3
Peak Output Apparent Power [VA]
6000,60s
72000,60s
8400,60s
9600,60s
12000,60s
Rated AC Voltage/Range [V]
L+N+PE, 220, 230, 240/180~280
Rated Output Frequency/Range [Hz]
50,60/45～55,55～65
Output THDv (@ Linear Load)
<3%
Efficiency
Max. Efficiency
97.6%
Euro Efficiency
97.0%
Protection
Battery Input Reverse Polarity Protection
Integrated
Over Load Protection
Integrated
AC Short Circuit Current Protection
Integrated
DC Surge Protection
Integrated
AC Surge Protection
Integrated
Anti-islanding Protection
Integrated
AFCI Protection
Optional
RSD Protection
Optional
Interface
PV Connection
MC4/D4(Optional)
AC Connection
Plug-in connector
Battery Connection
Quick connector
Display
LED+APP
Communication
Wi-Fi/Ethernet/4G(Optional)
General Parameters
Topology
Non-isolated
Operating Temperature Range
-40℃to +60℃(45℃and above with derating)
Cooling Method
Natural Convection
Ambient Humidity
0-100% Non-condensing
Altitude
4000m (>3000m Power Derating)
Noise [dBA]
<35
Ingress Protection
IP65
Dimensions [H*W*D] [mm]
430.5* 549 *223
Weight [kg]
26
Warranty [Year]
Refer to the warranty policy
Standard
CEI 0-21, VDE4105-AR-N, VDE0126-1-1, EN50438, G98, G99, EN50549, AS4777.2, IEC62109-1&-2, IEC62040-1 ,
EN61000-6-1/2/3/4

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INSTRUCTIONS FOR
INSTALLATION
4.1 Unpacking and Inspection
4.1.1 Checking the Package
Although SAJ’s products have thoroughly tested and checked before delivery, there is possibility that the
products 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.
4.1.2 Scope of Delivery
Please contact after sales if there are missing or damaged components.
Inverter Package
H2 Inverter*1
Hexagon Philips bolt
group M5*12 1PCS
Sunk screw M4*10
12PCS
PV terminal 3*2
Documents
Waterproof
communication
terminal block*1
Rear Panel*1
Battery terminal 1*2
AC terminal*6
M6*50 screw suite*4
Communication module*1
(Optional)
Waterproof AC
terminal block*1
Smart meter*1
Current transformer*1
120Ωresistor*1
Meter COMM cable*1
(1000mm)
The documents include the user manual and packaging list.
4.

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4.2 Installation Method and Position
4.2.1 Installation Position and Clearance
This device is cooled by natural convention and suggested an indoor installation or an installation under a
sheltered place to prevent the product from exposure to direct sunlight, rain and snow erosion.
Figure 4.1
Installation location
Please reserve enough clearance around the product to ensure a good air circulation at the installation area.
Because poor air ventilation will affect the working performance of internal electronic components and
shorten the service life of the system.
50CM
50CM
50CM
50CM
30CM
Figure 4.2
Installation clearance
4.2.2 Mounting Method
Figure 4.3
Mounting method
①The equipment employs natural convection cooling, and it can be installed indoor or outdoor.
②Mount vertically. Never install the device tilted forwards, sideways, horizontally or upside down.
③When mounting the device, please consider the solidity of wall for product, 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.
Keep away from sunlight Keep dry Keep it clear of snow Sun Rain Accmulated snow

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•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.
4.3 Mounting Procedure
4.3.1 Installation Tools
Installation tools include but are not limited to the following recommended ones. Please use other auxiliary
tools on site if necessary.
4.3.2 Mounting Procedures
1. Mark the Positions of the Drill Holes on the Rear Panel
The mounting position should be marked as shown in the following figure.
16
8
360
165
Figure 4.4
Mark positions
2. Drill Holes and Place the Expansion Tubes
Drill 4 holes in the wall (in conformity with the position marked in Figure 4.4), and then place expansion tubes
in the holes using a rubber mallet.
Marker Measuring tape Utility knife
Multimeter
Measurement
range: 1100Vdc
Protective gloves Dust mask Earplugs Goggles
Insulated shoes
Heat shrink tubing Heat gun Hammer drill Drill
bit: Φ10 Rubber mallet
Phillips screwdriver
Wrench

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19
20
360
165
4- ∅
8
Figure 4.5
Drill holes for installation
3. Secure the Screws and the Rear Panel
The panels should be secured onto the mounting position by screws as shown in Figure 4.6.
Figure 4.6
Secure the panel
4. Mount the Inverter
Carefully mount the inverter into the rear panel as shown in Figure 4.7. Make sure that the rear part of the
equipment is closely mounted into the rear panel.
Figure 4.7
Mount the inverter

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ELECTRICAL
CONNECTION
5.1 Additional Grounding Cable
Electrical connection must only be operated by professional technicians. Before connection, necessary
protective equipment must be employed by technicians, including insulating gloves, insulating shoes and
safety helmet.
WARNING
·Connect this additional grounding cable before other electrical connection.
Note: The additional cable and OT/DT terminal should be prepared by user themselves.
Figure 5.1
Preparing additional grounding cable
1. Heat shrink tubing 2. OT/DT terminal
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. Connect the grounding cables as the following diagram.
Note: A 6 mm2conductor cross-sectional area of cable is recommended for additional grounding cable.
12
5.

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24
Figure 5.2
Connecting the additional
grounding cable
5.2 AC Grid Wire and Backup Output Connection
Cable cross-sectional area（mm²）
Range
Recommend
13~21
16
Additional grounding cable cross-sectional area (mm²): 6
Table 5.1
Recommended specifications of AC cables
Note: If the grid-connection distance is too far, please select an AC cable with larger diameter as per the
actual condition.
Procedure:
Step 1: Open the waterproof cover, feed the AC cable through the AC waterproof hole.
Figure 5.3
Thread the cables
Step 2: Fix the cables according to conductor marks of L, N and PE.
Figure 5.4
Connect the Cables

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Step 3: Secure all parts of the grid and backup connector tightly.
Figure 5.4
Screw the Connector
Step 4: During off grid operation time, PE line at the BACK-UP end will remain to be connected with
the PE line at the power grid end inside the inverter. (Only applicable to market in Australia)
5.2.1 Multiple Inverter Combinations
Inverter
1 Phase
Inverter
1 Phase
Inverter
1 Phase
Test Circuit
Connection
3 Phase
A
B
C
N
5.2.2 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.
Note：The inverter cannot be used with functionally earthed PV Arrays.
5.2.3 External AC Circuit Breaker and Residual Current Device
Please install a 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
H2-5~10K-S3
100A
Notice: Do not connect multiple inverters to one AC circuit breaker.
Table 5.2
Recommended circuit breaker specification
5.3 PV 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）
Conductor material
Scope
Recommended value
Outdoor multi-core copper wire cable, complying
with 600Vdc
4.0~6.0
4.0
Table5.3
Recommended specifications of DC cable
The inverter should not be installed in multiple phase
combinations. If any such multiple inverter
combination is not tested，it should not be used or
external devices should be used in accordance with
the requirements of AS/NZS 4777.1

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5.3.1 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 5.5
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.
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 5.6
Striping off the insulation skin of cables
3. Assembly the positive and negative cables with corresponding crimping pliers.
Figure 5.7
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 5.8
Inserting crimped cables to connectors
5.Fasten the lock screws on positive and negative connectors.
Figure 5.9
Securing the connectors

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6.Make sure the DC switch is at OFF position
Figure 5.10
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 5.11
Plug in PV connectors
5.4 Communication Connection
Notes:
1. Confirm that the DC switch is OFF during installation to avoid short circuit caused by wrong operation
during battery wiring.
2. Please use the battery cable in original package.
Attention: The meter can only be connected to the RS485-A1+ and RS485-B1- signal ports.
EMS/METER
1
RS485-A1+
2
RS485-B1-
3
NC
4
NC
5
NC
6
NC
7
RS485-A2+
8
RS485-B2-
CT
1
R/CT.I+
2
R/CT.1-
3
NC
4
NC
5
NC
6
NC
7
NC
8
NC
DRM
1
DRM1/5
2
DRM2/6
3
DRM3/7
4
DRM4/8
5
RefGen
6
Com/DRM0
7
V+
8
V-
CAN/BMS
1
NC
2
NC
3
NC
4
CANH
5
CANL
6
NC
7
NC
8
NC
PORT0
1
NC
2
NC
3
NC
4
NC
5
NC
6
NC
7
NC
8
NC
PORT1
1
NC
2
NC
3
NC
4
NC
5
NC
6
NC
7
NC
8
NC
PV+
PV-
PV+
-
+PV-
-
+

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Thread the communication cable through the waterproof cable gland and connect to the corresponding port.
Figure 5.12
Communication cable connection
5.5 Communication Module Installation
Figure 5.13
4G/WiFI port
Plug in the communication module to 4G/WIFI port and secure the module by rotating
the nut.
1. 4G/Wi-Fi port could be externally connected with eSolar 4G module, eSolar Wi-Fi module or eSolar AIO3
module, for operation in details please refer to communication module Quick Installation Guide in
https://www.saj-electric.com/ .
5.6 Connecting Battery Power Cable
·Power off the battery system before connecting the power cable to avoid high voltage danger
·The electrical connection of high voltage battery systems must be operated by qualified technicians in accordance with
local and national power grid standards and regulations.
5.7 Battery Connection
If lithium battery is connected, it is not required to install a breaker between battery and inverter.
Cable Cross-sectional area（mm²）
Range
Recommend
8~10
8
Table 4.4
Recommended specifications of DC cables