SAJ Sununo-TL Series User manual

Sununo-TL Series
Add No. 17, Xiangshan Road, Guangzhou Science City, Guangdong, China
Zip: 510663 Tel: [phone] Fax: [phone]
E-mail: [e-mail]
Web: www.saj-solar.com
:
User Manual
*Note：Since Guangzhou Sanjing Electric Co.,Ltd has a policy of continuous product improvement,
it reserves the right to change design and specifications without notices.
*Edition No.:V1.2_E(MC)

Preface
Guangzhou Sanjing Electric Co., Ltd.
GR EEN TECHNIC GRE EN FUTURE
Thank you for choosing SAJ solar inverter. We are happy to provide
you with first-class products and quality service.
T h e m a n u al i n cl u d e s i n st a l l at i o n, o p er a t i on , ma i n te n a n ce ,
troubleshooting, and safety notice. As long as you follow the
instruction of this manual, you will get the professional guidance
and our wholehearted service.
Customer-orientation is our forever commitment. We hope this
“User Manual” become your good helper in solar power generation.
This manual subjects to change at regular intervals according to
customer's feedback.
Please check the latest version at www.saj-solar.com

Contents
User Manual User Manual
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1. Notes on
1.1 Scope of Validation
1.2 Symbols Used
1.3 Target Group
2. Preparation
2.1 System Demonstration
2.2 Safety Instructions
2.3 Explanations of Symbols on Inverter
3. Product Information
3.1 Overview
3.2 Major Characteristics
3.3 Datasheet
4. Unpacking
4.1 Assembly Parts
4.2 Further Information
5. Installation
5.1 Safety
5.2 Mounting Instructions
5.3 Safety Clearance
5.4 Mounting Procedure
5.5 Check Varistors
5.6 Maintenance
5.7 Module Technology
5.8 Pollution Degree
5.9 Overvoltage Category
This Manual
6. Electrical Connection
6.1 Safety
6 2 Overview of Connection Area
6.3 AC Side Connection
6.4 DC Side Connection
6.5 DC Side Disconnection
6.6 Communication and Monitoring Setting
7. LCD Operation
7.1 LCD Display
7.2 Operation Method
7.2.1 Button Function
7.2.5 Running-Info
7.2.7 Current Error
7.2.8 History Errors
7.2.9 Set-Param
7.2.10 Inverter-Info
8. Recycling and Disposal
9. Troubleshooting
10. Guaranty Service
11. Contact SAJ
Abbreviation
.
6.6.1 Communication through RS485
6.6.2 Communication through Ethernet
6.6.3 Cable Assembly Instructions
7.2.2 LCD Menu
7.2.3 Set The Country First
7.2.4 State
7. 2. 6 Statistic-Info
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1. NOTES ON THIS MANUAL
This discribes instructions and detailed procedures for installing,
operating, maintaining, and troubleshooting of the following SAJ grid-tie
inverters:
SU3KMTLI, SU4KMTLI, SU5KMTLI
Please keep this manual all time available in case of emergency.
User Manual
1.2 SYMBOLS USED
2. PREPARATION
DANGER
DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
CAUTION indicates a hazardous condition which, if not
avoided, can result in minor or moderate injury.
CAUTION
NOTICE indicates a situation that can result in potential
damage, if not avoided.
NOTICE
WARNING
avoided, can result in death or serious injury or moderate
injury.
WARNING indicates a hazardous situation which, if not
User Manual
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User Manual
2
Sununo– TL5K
Sununo– TL2K,Sununo– TL1.5K, Sununo– TL3KB, Sununo– TL4KB,
Sununo– TL3KA, Sununo– TL4KA,
1.3 TARGET GROUP
Solar energy generation systems, based on photovoltaic modules, nowadays
represent the most suitable solution to reduce the energy consumption
produced by oil and gas.
The solar inverter is a key device in a solar energy system. It performs the
conversion of the variable DC output of the PV modules into a clean sinusoidal
50Hz/60Hz AC current that is then directly applied to the commercial
electrical grid or to a local grid electrical network.
Typically, solar inverter includes communication function to monitor
operating condition, firmware to update and control the grid connection.
Depending on the grid infrastructure, cabled (RS-485, CAN, Power Line
Communication, Ethernet) or cableless (Bluetooth, ZigBee/IEEE802.15.4)
networking options can be used.
2.1 SYSTEM DEMONSTRATION
Figure 2.1
Solar
Panels
Purchase
Solar
inverter
Grid
Sell
Only qualified electricians who have read and fully understood all safety
regulation contained in this manual can install, maintain and repair the
inverter. Operators must be aware of the high-voltage device.
1.1 SCOPE OF VALIDATION

2.2 SAFETY INSTRUCTIONS
User Manual
3
User Manual
4
DANGER
·
·
·
·o not
·o not
·
DANGER 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.
D touch the surface of the inverter while the
housing is wet, it might lead to electrical shock.
D 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 at least five minutes to let the energy storage
capacitors fully discharged after disconnecting from
power source.
WARNING
·
·
deny
·must only be operated
·
properties
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 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 and persons.
NOTICE
·Public utility only.
·
；
The PV 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.
CAUTION
·
·
·
·
The PV inverter will become hot during operation.
Please don’t touch the heat sink or peripheral surface
during or shortly after operation.
Risk of damage due to improper modifications.
Never modify or manipulate the inverter or other
components of the system.
For radiation prevention, do not stay closer than 20cm
to the inverter for any length of time.

2.3 EXPLANATIONS OF SYMBOLS ON INVERTER
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 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.
Certified safety
The inverter complies with the requirement of the
Equipment and Product Safety Act in Europe.
CE Mark
Eq uipme nt with the CE mark fulfi lls the basi c
requirements of the Guideline Governing Low-Voltage
and Electro-magnetic Compatibility.
No unauthorized perforations or modifications
Any unauthorized perforations or modifications are
s t r i c t l y f o r b i d d e n , i f a n y d e f e c t o r d a m a g e
(device/person) is occurred, SAJ shall not take any
responsibility for it.
3.PRODUCT INFORMATION
3.1 OVERVIEW
Industrial design Reduced Heat Sink
Figure 3.1
ATTE NT IO N!
User Manual
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User Manual
6
Sununo-TL1.5K/2K
Sununo-TL3KB/4KB
Sununo-TL 3KA/4KA/5K
Ris k of ele ctr ic s hock! O nly
a ut ho ri ze d p er so nn el a re
al low ed t o do d isas sem bly,
mod ifica tion or ma inten ance.
A ny r e s ul t i ng d ef e ct o r
dam age (d evice /pers on) is not
cov ered by S AJ guar anty.
SU3KMTLI/SU4KMTLI/SU5KMTLI
SAA Mark
The inverter complies with the requirement of Equipment
and Product Safety Act in Australia.

User Manual
7
User Manual
3.2 MAJOR CHARACTERISTICS
SAJ grid - tie solar inverter has following characteristics which make SAJ
grid - tie solar inverter “High Efficiency, High input voltage with more PV
panels in series.”
• High input voltage with more PV panels in series.
• Two independent MPP trackers for flexible configuration and easy
installation.
• Ultra-high MPP tracking efficiency for full power range.
• Transformerless design.
• Multi communication interfaces,including RS485,Ethernet RJ45,Wi-Fi.
• Multi language display.
• Easy LCD operation with multi-language display.
• DC switch (optional).
• High-grade power components.
• Small size, light weight, easy installation.
Besides, following functions methods are integrated in SAJ grid - tie solar
inverter:
• Internal overvoltage protection
• DC insulation monitoring
• DC side varistor
• Ground fault protection
• Grid monitoring
• Ground fault current monitoring
• Anti-islanding protection
3.3 DATASHEET
8
Input (DC)
Max. DC Power [W]
Max. DC Voltage [V]
MPPT Voltage Range [V]
MPPT Voltage Range[V](Full Load)
DC Nominal Voltage [V]
Start Voltage [V]
Min. DC Voltage [V]
Max. DC Current Input [A]
Number of DC Connection Sets
Number of MPP Trackers
DC Switch
Output (AC)
Rated AC Power [W]
Max. AC Power [W]
Rated AC Current [A]
Max. AC Current [A]
Norminal AC Voltage/Range
Grid Frequency/Range
Power Factor(cos φ)
AC Current Distortion (THD)
Consumption at Night [W]
Consumption at Standby [W]
Efficiency
Max. Efficiency
Euro Efficiency (at 360Vdc)
MPPT Accuracy
Protection
Internal Overvoltage Protection
DC Insulation Monitoring
DC Side Varistors
Direct Current Monitoring
Ground Fault Current Monitoring
Grid Monitoring
AC Short Current Protection
Thermal Protection
Anti-island protection monitoring
Interface
AC Connection
DC Connection
LCD Display
Display Language
Datalogger & Communication
General Data
Isolation
Operating Temperature Range
Cooling Method
Ambient Humidity
Site Altitude above Sea Level
Noise Emission ( A)
IP Protection
Mounting
Dimensions (WxHxD) [mm]
Weight [kg]
Standard Warranty (Year)
Safety Class Compliance
EMC Compliance
dB
Type
Sununo-TL1.5K Sununo-TL2K
480
120-384
360
150
100
1
1
Optional
220V, 230V, 240V/180V-280V
50Hz, 60Hz/ ±5Hz
>0.99 [full load]
< 2%
<0.2
6
>99.5%
Integrated
Integrated
Integrated
Integrated
Integrated
Integrated
Integrated
Integrated
AFD
Terminals
MC4/H4
LCD(16x2 Characters Backlight) & LED(3 Lights)
Multi Language
2*RS485(Standard) Wi-Fi/Ethernet(Optional)
Transformerless
-25°C to +60°C [45°C to 60°C with derating ]
Natural Convection
0% to 98% Non-condensing
Up to 2000m
<40
IP65 [Indoor or Outdoor Installation]
Rear Panel
415*313*140
11
5 / 10 / 15 / 20 / 25 [Optional]
As3100 IEC62109-1/-2
，
，
，
EN61000-6-2，EN61000-6-3，EN61000-3-2，EN61000-3-3
1800
164-384
11
1500
1650
6.5
8.5
97.4%
96.5%
2300
190-384
12
2000
2000
8.7
11.0
97.4%
96.7%
Grid Protection Compliance VDE 0126-1-1/A1，VDE 4105，G83，RD1699， C10/11，
AS4777.3，EN50438，CGC/CF004

User Manual User Manual
9 10
Input (DC)
Max. DC Power [W]
Max. DC Voltage [V]
MPPT Voltage Range [V]
MPPT Voltage Range[V](Full Load)
DC Nominal Voltage [V]
Start Voltage [V]
Min. DC Voltage [V]
Max. DC Current Input A/Input B[A]
Number of DC Connection Sets
Number of MPP Trackers
DC Switch
Output (AC)
Rated AC Power [W]
Max. AC Power [W]
Rated AC Current [A]
Max. AC Current [A]
Norminal AC Voltage/Range
Grid Frequency/Range
Power Factor(cos φ)
AC Current Distortion (THD)
Consumption at Night [W]
Consumption at Standby [W]
Efficiency
Max. Efficiency
Euro Efficiency (at 360Vdc)
MPPT Accuracy
Protection
Internal Overvoltage Protection
DC Insulation Monitoring
DC Side Varistors
Direct Current Monitoring
Ground Fault Current Monitoring
Grid Monitoring
AC Short Current Protection
Thermal Protection
Anti-island protection monitoring
Interface
AC Connection
DC Connection
LCD Display
Display Language
Datalogger & Communication
General Data
Isolation
Operating Temperature Range
Cooling Method
Ambient Humidity
Site Altitude above Sea Level
Noise Emission dBA)
IP Protection
Mounting
Dimensions (WxHxD) [mm]
Weight [kg]
Standard Warranty (Year)
Safety Class Compliance
EMC Compliance
(
Type
Sununo-TL3KA Sununo-TL4KA
550
125-440
200-440
360
150
100
2
2
Optional
220V, 230V, 240V/180V-280V
50Hz, 60Hz/ ±5Hz
>0.99 [full load]
< 2%
<0.2
6
>99.5%
Integrated
Integrated
Integrated
Integrated
Integrated
Integrated
Integrated
Integrated
AFD
Terminals
MC4/H4
LCD(16x2 Characters Backlight) & LED(3 Lights)
Multi Language
2*RS485(Standard) Wi-Fi/Ethernet(Optional)
Transformerless
-25°C to +60°C [45°C to 60°C with derating ]
Natural Convection
0% to 98% Non-condensing
Up to 2000m
<40
IP65 [Indoor or Outdoor Installation]
Rear Panel
525*425*175
23
5 / 10/15/20/25 [Optional]
，
，
AS3100， IEC62109-1，IEC62109-2
EN61000-6-2，EN61000-6-3，EN61000-3-2，EN61000-3-3
3200
15/15
3000
3000
13.0
15.0
97.6%
96.8%
4200
15/15
4000
4000
17.4/16
20.0/16
97.6%
96.8%
Input (DC)
Max. DC Power [W]
Max. DC Voltage [V]
MPPT Voltage Range [V]
MPPT Voltage Range[V](Full Load)
DC Nominal Voltage [V]
Start Voltage [V]
Min. DC Voltage [V]
Max. DC Current Input [A]
Number of DC Connection Sets
Number of MPP Trackers
DC Switch
Output (AC)
Rated AC Power [W]
Max. AC Power [W]
Rated AC Current [A]
Max. AC Current [A]
Norminal AC Voltage/Range
Grid Frequency/Range
Power Factor(cos φ)
AC Current Distortion (THD)
Consumption at Night [W]
Consumption at Standby [W]
Efficiency
Max. Efficiency
Euro Efficiency (at 360Vdc)
MPPT Accuracy
Protection
Internal Overvoltage Protection
DC Insulation Monitoring
DC Side Varistors
Direct Current Monitoring
Ground Fault Current Monitoring
Grid Monitoring
AC Short Current Protection
Thermal Protection
Anti-island protection monitoring
Interface
AC Connection
DC Connection
LCD Display
Display Language
Datalogger & Communication
General Data
Isolation
Operating Temperature Range
Cooling Method
Ambient Humidity
Site Altitude above Sea Level
Noise Emission dBA)
IP Protection
Mounting
Dimensions (WxHxD) [mm]
Weight [kg]
Standard Warranty (Year)
Safety Class Compliance
EMC Compliance
(
Type
Sununo-TL3KB Sununo-TL4KB
550
125-440
360
150
100
2
1
Optional
220V, 230V, 240V/180V-280V
50Hz, 60Hz/ ±5Hz
>0.99[full load]
< 2%
<0.2
6
>99.5%
Integrated
Integrated
Integrated
Integrated
Integrated
Integrated
Integrated
Integrated
AFD
Terminals
MC4/H4
LCD(16x2 Characters Backlight) & LED(3 Lights)
Multi Language
2*RS485(Standard) Wi-Fi/Ethernet(Optional)
Transformerless
-25°C to +60°C [45°C to 60°C with derating ]
Natural Convection
0% to 98% Non-condensing
Up to 2000m
<40
IP65 [Indoor or Outdoor Installation]
Rear Panel
450*375*177
21
5 / 10/15/20/25 [Optional]
，
，
AS3100， IEC62109-1，IEC62109-2
EN61000-6-2，EN61000-6-3，EN61000-3-2，EN61000-3-3
3400
200-440
17
3000
3300
13.0
15.0
97.7%
97.1%
4500
225-440
20
4000
4400
17.4/16
20.0/16
97.7%
97.1%
Remarks: Meet the grid standard AC current per phase not exceeding 16A.
1
1
VDE 0126-1-1/A1，VDE 4105， G83，G59，RD1699， C10/11，
AS4777.3，EN50438，CGC/CF004
Grid Protection Compliance
1
1
Remarks: Meet the grid standard AC current per phase not exceeding 16A.
VDE 0126-1-1/A1，VDE 4105， G83，RD1699， C10/11，
AS4777.3，EN50438，CGC/CF004
Grid Protection Compliance

User Manual User Manual
12
4. UNPACKING
4.1 ASSEMBLY PARTS
After you receive the SAJ grid-tie solar inverter, please check if there is any
damage on the carton. Also, please check the inside completeness and for any
visible external damage on the inverter or any accessories. Contact your dealer
if anything is damaged or missing.
Object Description
Quantity
A
B
D
E
F
H
I
1
1
2
6
6
1
1
SAJ grid-tie solar inverter
Rear panel
RS485 connector(if attached)
M6×50 Expansion screw
Expansion tube
M4×12 Cylinder head screw and Lock washer
(Sununo-TL1.5K/2K/3KB/4KB)
M5×12 Cylinder head screw and Lock washer
(Sununo-TL3KA/4KA/5K, SU3KMTLI, SU4KMTLI,SU5KMTLI)
User manual, including installation guide
Warranty card
C
4
G
Figure 4.1
DC connector (for Sununo-TL3KB/4KB/3KA/4KA/5K,
SU3KMTLI, SU4KMTLI, SU5KMTLI)
1 sets
2 sets
11
ABC
D
E F
GHI
*
**
Here indicastes there is another unit [VA] of these data which is applied to C10/11.
Sununo-TL5K/4KA/3KA has different dimensions for enclosure as
SU5KMTL1、SU4KMTL1、SU3KMTL1,detail see table documents.
DC connector (for Sununo-TL1.5K/2K)
Input (DC)
Max. DC Power [W]
Max. DC Voltage [V]
MPPT Voltage Range [V]
MPPT Voltage Range[V](Full Load)
DC Nominal Voltage [V]
Start Voltage [V]
Min. DC Voltage [V]
Max. DC Current Input A/Input B[A]
Number of DC Connection Sets
Number of MPP Trackers
DC Switch
Output (AC)
Rated AC Power [W]
Max. AC Power [W]
Rated AC Current [A]
Max. AC Current [A]
Norminal AC Voltage/Range
Grid Frequency/Range
Power Factor(cos φ)
AC Current Distortion (THD)
Consumption at Night [W]
Consumption at Standby [W]
Efficiency
Max. Efficiency
Euro Efficiency (at 360Vdc)
MPPT Accuracy
Protection
Internal Overvoltage Protection
DC Insulation Monitoring
DC Side Varistors
Direct Current Monitoring
Ground Fault Current Monitoring
Grid Monitoring
AC Short Current Protection
Thermal Protection
Anti-island protection monitoring
Interface
AC Connection
DC Connection
LCD Display
Display Language
Datalogger & Communication
General Data
Isolation
Operating Temperature Range
Cooling Method
Ambient Humidity
Site Altitude above Sea Level
Noise Emission dBA)
IP Protection
Mounting
Dimensions (WxHxD) [mm]
Weight [kg]
Standard Warranty (Year)
Safety Class Compliance
EMC Compliance
(
Type
5200
550
125-440
200-440
360
150
100
16 / 16
2
2
Optional
5000
5000
21.7
25
220V, 230V, 240V/180V-280V
50Hz, 60Hz/±5Hz
>0.99 [full load]
< 2%
<0.2
6
97.71%
97.1%
>99.5%
Integrated
Integrated
Integrated
Integrated
Integrated
Integrated
Integrated
Integrated
AFD
Terminals
MC4/H4
LCD(16x2 Characters Backlight) & LED(3 Lights)
Multi Language
2*RS485(Standard) Wi-Fi/Ethernet(Optional)
Transformerless
-25°C to +60°C [45°C to 60°C with derating ]
Natural Convection
0% to 98% Non-condensing
Up to 2000m
<40
IP65 [Indoor or Outdoor Installation]
Rear Panel
525*425*190
26
5 / 10 /15/20/25 [Optional]
，
，
AS3100， IEC62109-1，IEC62109-2
EN61000-6-2，EN61000-6-3，EN61000-3-2，EN61000-3-3
Sununo-TL5K
VDE 0126-1-1/A1，VDE 4105，G83，G59，RD1699，
C10/11，AS4777.3，EN50438，CGC/CF004
Grid Protection Compliance

User Manual
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User Manual
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4.2 FURTHER INFORMATION
If you have any further questions concerning the type of accessories or
installation, please check our website www.saj-solar.com or contact our
service hotline.
5. INSTALLATION
5.1 SAFETY
·
·
·
SAJ grid - tie solar inverter is cooled by natural flow of air behind the
inverter.
SAJ grid - tie solar inverter is designed for installation both indoors and
outdoors.
Please only mount the inverter in the direction as illustrated above.
Figure 5.1 Bad cooling
15
5.2 MOUNTING INSTRUCTIONS
DANGER
·
·o not
·
DANGER to life due to potential fire or electricity
shock.
D 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
·
·exposed
·
NOTICE due to the inappropriate or the harmonized
installation environment may jeopardize the life span of
the inverter.
Installation directly under intensive sunshine
is not recommended.
The installation site must have good ventilation
condition.
·
·
·
·
·
·
·Installing the inverter under strong sunshine is not recommended; the excess
heating might lead to power reduction.
·
·Make sure enough ventilation at installation spot; insufficient ventilation
may affect the operating performance of the inside electronic components,
even shorten the life span of the device.
Installation of the inverter in the vertical direction is recommended.
Tilted backward max.15 degree is allowed.
Never install the inverter forward, horizontally or even upside down.
For the convenience of checking the LCD display and possible maintenance
activities, please install the inverter at eye level.
Make sure the wall you selected is strong enough to handle the screws and
the weight of the inverter.
Ensure the inverter is properly fixed to the rear panel.
The ambient temperature of installation site should be between - 25 °C and
+60 °C ( between -13 °F and 140 °F ) .
Figure5.2
Direction
Above
Below
Side
Front
Minimum Clearance
30 cm
50 cm
30 cm
5 cm
5.3 SAFETY CLEARANCE
To make sure the ventilation of the installation spot, if there are multiple SAJ
grid-tie solar inverters installed in the same area, the following safety
clearance shall be followed for proper ventilation conditions.
5cm 30cm
50cm 30cm
30cm

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5.4 MOUNTING PROCEDURE
1. Use the rear panel in the package as a drilling template and mark the
positions of the drill holes, as illustrated below.
Sununo-TL1.5K/2K
2-φ8
346
280
268
230
Figure 5.3
S u n u n o - T L 3 K A / 4 K A
SU3KMTLI/SU4KMTLI
Sununo-TL/5K
SU5KMTLI
Sununo-TL3KB/4KB
346
280
304 230
2-φ8
8
280
16
294
2-φ9
9
290
19
294
2. According to the marks, drill 6 holes in the wall (in conformity with position
marked in above picture), and then place expansion tubes in the holes using a
rubber hammer.
Figure 5.4
Figure 5.6
Notch
3. Mount the rear panel.
Wring six screws into the expansion tubes and tightly mount the rear
panel on the wall.
Figure 5.5
4. Carefully attach the inverter to the rear panel according to the position of the
screws.Make sure the backside of the inverter is closely against the rear panel.
When two people transport the inverter, make sure each one use the hand grip in
right position as illustrated in the picture.
5. Pay attention to the four notches cut in both flanks of heat sink (as illustrated
in above picture), which should be placed in corresponding hooks from the rear
panel. Make sure that the heat sink and the rear panel are buckled together and
the inverter is tightly attached to the rear panel. And tighten the screws with
5.9N·m torque.

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6. Please carefully check the accessories and original carton to make sure
during the installation every necessary part is used and nothing is missing.
Figure 5.7
Figure 5.8
5.5 CHECK VARISTORS
If one or more of the varistors might be out of function, please check or replace
the varistors according to the following steps:
1. Loosen all 4 captive screws of the removable front lid. Right after the
4 captive screws are removed, please keep them at a distance. Lift the lid
upwards and remove it.
2. There are 2 varistors for and 4 varistors for
Sununo-TL in the left side.
Sununo-TL1.5K/2K/3KB/4KB
3KA/4KA/5K/SU3KMTLI/SU4KMTLI/SU5KMTLI
Figure 5.9
Sununo-TL1.5K/2K
Sununo-TL 3KA/4KA/5K
SU3KMTLI/SU4KMTLI/SU5KMTLI
Figure 5.11
3. Remove and install the varistors
Remove:
First use specified tool and insert it to three holes
in the left side of the varistor, then press it to the
end.
Pull the varistor out.
Figure 5.10
Install:
Use specified tool and insert it to three holes in
the left side of the varistor, then press it to the
end.
Press the varistor in.
Sununo-TL3KB/4KB

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4. Put the lid back and re-screw all 4 screws, make sure the lid is tightening to
the inverter.
5.6 MAINTENANCE
Ask your installer to check for proper inverter operation at regular
intervals.
5.7 MODULE TECHNOLOGY
SAJ grid - tie solar inverters provide the optimal solution for any module.
Transformerless-type SAJ grid-tie solar inverters are designed for ungrounded
modules, especially for the crystalline silicon photovoltaic modules, such as
monocrystalline silicon and polycrystalline silicon. While the thin-film
modules are not suitable for SAJ transformerless inverters.
5.8 POLLUTION DEGREE
SAJ grid-tie solar inverters comply with the pollution degree 3.
5.9 OVERVOLTAGE CATEGORY
Overvoltage category III applies to SAJ grid - tie solar inverter AC
terminals. For PV circuits in general, Overvoltage Category II is assumed. ·Elect rical co n nect i ons shal l be ca rrie d ou t in
accordance with the applicable regulations, such as
conductor sections, fuses, earthing protection.
NOTICE
DANGER
·
·
·
DANGER to life due to potential fire or electricity
shock.
With the inverter powered, comply with all prevailing
national regulations on accidents prevention.
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.
6. ELECTRICAL CONNECTION
6.1 SAFETY

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6.2 OVERVIEW OF CONNECTION AREA
Bottom:
Object
A
B
D
E
F
C
Description
DC switch to turn off the inverter manually(optional)
DC input
Plug for connecting the RS485 communication module
Plug for connecting communication module
AC output
Heat sink
Ethernet (optional)
/Figure 6.1
ABC
D
E
F
Sununo-TL3KA/4KA/5K/SU3KMTLI/SU4KMTLI
SU5KMTLI
Bottom:
6.3 AC SIDE CONNECTION
NOTICE
·The cross-section of the AC cable should be more than 12
AW G f o r S u n u n o - T L 1 . 5 K / 2 K a n d 1 0 AW G f o r
S u n u n o - T L 3 K B / 4 K B / 3 K A / 4 K A / 5 K , S U 3 K M T L I
SU4KMTLI/SU5KMTLI and Cable Rangeφ9-14mm.
Bottom:
Sununo-TL1.5K/2K
Sununo-TL 3KB/4KB
E
F
BC
F D
ABCE
D
A

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Assembly Instructions:
1. Strip the cable with the length 0.276 inches (9/32″) - (7mm) and please be
careful NOT to nick conductors.
Figure 6.2
Integrated RCD and RCM
Current Protective Device) and RCM (Residual Current Operated Monitor).
The current sensor will detect the volume of the leakage current and compare it
with the pre-set value. If the leakage current is above the permitted range, the
RCD will disconnect the inverter from the AC load.
The SAJ grid-tie solar inverter will probably cause a DC current in the external
protective earthing conductor. Where a residual current-operated protective
(RCD) or monitoring (RCM) device is used for protection in a case of direct or
indirect contact, only an RCD or RCM of Type B is allowed on the supply side
of this product. Provided an AC current or pulse current is caused in the
external protective earthing conductor, an RCD or RCM of Type AC or Type A
as alternative can be permitted putting into use.
·
·Never
DANGER to life due to potential fire or electricity
shock.
connect or disconnect the connectors under
load.
DANGER
Cable
0.276 inches(9/32″)-(7mm)
Figure 6.3
Figure 6.4
Figure 6.5
The SAJ grid - tie solar inverter is equipped with integrated RCD (Residual
2. Screw off and separate each component of AC connector as follows.
3. Pass the cable through each component from right to the left as follows.
Tighten the screws with 3.0N·m torque.
4. Use a screw driver and loose the three screws at the side of the straight plug.
Then insert the stripped N, L and PE cable accordingly to the corresponding
position and fully tighten the screws.
Connect L, N and protective conductor ( ) to the AC terminal in
accordance with the label.

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5. Aim the terminals on the straight plug to the holes of the grommet, and then
compress them together.
6. Finally, connect the straight plug to the AC terminal on inverter. Pay
attention to the polarity of the terminals to avoid wrong connecting.
6.4 DC SIDE CONNECTION
The cable length on DC side should not exceed 30 m.
Figure 6.6
Figure 6.7
To do this , the insulated earthing conductor must be 5mm longer than the
insulated L and N conductors! L and N must not be swapped.The ground wire
shall be larger than phase conductor.
Sununo-TL1.5K/2K
Sununo-TL 3KB/4KB
Sununo-TL3KA/4KA/5K
NO T E :

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In vert e r Typ e
Su nuno - TL1 . 5K
Su nuno - TL2 K
Su nuno - TL3 K B
Su nuno - TL4 K B
Su nu no- TL3 KA ,
SU 3K MTL I
Su nu no- TL4 KA ,
SU 4K MTL I
Su nu no- TL5 K,
SU 5K MTL I
MPP Tracker
1
Max.DC Voltage
550V ·
connected at input zone 1 and the negative pole at input
zone 2, this is called a mixed connection.
·Only connect strings at one input zone and never mix
the input zones 1 and 2!
For instance, if the positive pole of a string is
NOTICE
The DC connectors come pre-assembled and the caps are loose. The whole
connector will include the male side and female side as showed below:
Figure 6.8
·
make sure the inverter is isolated and disconnected from
the PV source and AC grid.
·
Before electrical connection setup, installer shall
The inverter may only be operated with PV generators
(Class A PV modules according to IEC 61730 and
cabling) of protection class II. Do not connect any
sources of energy other than PV modules to the inverter.
NOTICE
·
please use the sealing plug to seal the left DC input set to
ensure the inverter IP 65 protection.
If only one string input is used for DC connection,
NOTICE
·
·
DANGER to life due to potential fire or electricity shock.
Never connect or disconnect the connectors under load.
DANGER
Max. DC
Power (W)
Max.DC
Current/per string(A)
2
1800
2300
3400
4500
4200
5200
480V
11
12
17
20
15A/15A
16A/16A
A
A
A
A
Female side connector (F)
Male side connector (M)
No mixed connections between input zones(for Sununo-
T L 3 K B / 4 K B a n d S u n u n o - T L 3 K A / 4 K A / 5 K ,
S U 3 K M T L I / S U 4 K M T L I / S U 5 K M T L I ) .
For Sununo – TL 1.5K/2K/3KB/4KB, there is just one MPP Tracker. These
single MPPT inverters require same type module same quantity, identical
alignment and tilt.
For Sununo–TL3KA/4KA/5K,SU3KMTLI/SU4KMTLI/SU5KMTLI, there are
two MPP Trackers for the two string inputs. Unlike the traditional single MPPT
inverters which require same type module, same quantity, identical alignment
and tilt, the multi-MPPT SAJ grid-tie inverters can deal with different solar
modules, different quantity, different alignment and tilt, thus can withstand
harshest environmental conditions.
with
15A/15A
3200

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4. Insert contact cable assembly into back of male and female connector. A
“click” should be heard or felt when the contact cable assembly is seated
correctly. See below figures.
5. Wrest the cap by using the torque of 2.6~2.9N·m.
6. After wrested the cap tightly, align the 2 half connectors and mate them
together by hand until a “click” is heard or felt.
Female side connector (F)
Figure 6.16
Male side connector (M)
Figure 6.15
Figure 6.17
Figure 6.18
Use specified strip tool in this step. Adjust the strip stopper and put the cable in
corresponding notch to strip the length of 7mm. See below figures.
2. Insert stripped cable into contact barrel and insure all conductor strands are
captured in the contact barrel and the conductors are visible in the contact
barrel observation hole. See below figures.
3. Crimp contact barrel by using the hex crimping die. ensure it is fixed.See
below figures.
Figure 6.10 Figure 6.11
Ba rr el o b s er va ti o n h ol e
Conductor should be visible
Ba rr el o b s er va ti o n h ol e
Conductor should be visible
Figure 6.12 Figure 6.13
Figure 6.14
Cable pull – out force requirement
Min. 310 N (70 Lbs)
Min. 400 N (90 Lbs)
Min. 450 N (100 Lbs)
Min. 500 N (110 Lbs)
Cable Size
2.5 mm
4 mm
6 mm
10 mm
2
2
2
2
Crimped pin contact Crimped socket contact
Pin contact Socket contact
Cable requirements:
Assembly Instructions:
1. Strip the cable with the length 0.276 inches (9/32")-(7mm) and please be
careful NOT to nick conductors.
Figure 6.9
Cable
0.276 inches(9/32")-(7mm)

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6.6 COMMUNICATION AND MONITORING SETTING
SAJ solar inverter offers 2 communication solutions for users: RS485
(standard) and Ethernet (optional). All the SAJ products involved in the solar
monitoring system are:
Sununo-TL series solar inverters: single phase transformerless on-grid solar
inverters, such as Sununo-TL1.5K/2K/3KA/4KA/5K，SU3KMTL1/
SU4KMTL1/SU5KMTL1
SAJ Logger: data logger for local monitoring and maintenance of solar
power plants,can be registered through SAJ Web Portal.
SAJ Web Portal: free monitoring application through web, iPhone,iPAD and
Android App. Internet access must be ensured for the inverter network
configuration before SAJ Web Portal service registration.
SAJ Web Server: the local web monitoring application through web browser built
in all SAJ inverters.For more detail information, please refer to SAJ Monitoring
Solution through www.saj-soalr.com
Note : The text lines in the following Figures indicates communication cable
6.6.1Communication through RS485
RS485 can be used for both single-point and multi-point communication. At
present, RS485 can communicate and monitor up to 32-inverters.
RS485 Single-point Monitoring
Communication of a single inverter is shown in Figure1 as below. Users can
connect inverter's RS485 port to PC through RS485/232 Module.
To realize multi-point monitoring of SAJ solar inverter, we offer
2configurations as shown in below:
(1) PC Multi-point Monitoring
Figure 6.19 Communication of a Single Inverter
Figure 6.20 PC Multipoint Monitoring
Figure 6.21 PC + SAJ Logger Multipoint Monitoring
RS485 Multi-point Monitoring
6.5 DC SIDE DISCONNECTION
Only qualified electricians who have fully understood all safety regulation
contained in this manual can disconnect and maintain the DC connectros.
(2) SAJ Logger Multipoint Monitoring

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Connection Procedures
1、Inverter 1 connects to Inverter 2 through RS485 cable; Inverter 2 connects
to Inverter 3 through RS485 cable. In the same way to connect all inverters.
2、Inverter 1 connects to RS485/232 Module through RS485-M cable or
connects to SAJ Logger through RS485-C cable.
3、Connect RS485/232 Module to PC's RS232 port, or connect SAJ Logger
to PC through Router.
4、Open the internal web server of SAJ logger for plant and inverter monitoring.
6.6.2 Communication through Ethernet RJ45
When users choose Ethernet communication solution, users can access to
Inverter real-time information through Inverter IP address, or through SAJ
Logger IP address. The configuration is shown in Figure6.22 as below:
6.6.3 Cable Assembly Instructions
Cable:All cables mentioned in this Manual are 5E Shielded Cable, as shown in
Figure6.23:
Terminals：According to different communication solutions, users may need
at least one of the below terminals. They are 3Pin Connector and RJ45 Plug as
shown in Figure6.24 and Figure6.25.
Figure 6.24 3Pin Connector
Figure 6.22 Communication through Ethernet RJ45
Figure 6.23 5E Shielded Cable
Four STP
Shield layers