Goodwe SMT Series User manual

SMT SERIES USER MANUAL
SOLAR INVERTER
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1 Symbols ............................................................................................................................... 01
2 Safety Measures & Warning ....................................................................... 02
3 Product Introduction ......................................................................................... 04
3.1 Intended Usage .......................................................................................................................... 04
3.2 Inverter Overview ....................................................................................................................... 05
3.3 Technical Description ................................................................................................................ 06
3.4 Package ....................................................................................................................................... 07
4 Installation ...................................................................................................................... 09
4.1 Mounting Instructions ............................................................................................................... 09
4.2 Equipment Installation ............................................................................................................. 09
4.3 Electrical Connection ................................................................................................................ 11
4.4 Communication Connection .................................................................................................... 15
5 System Operation .................................................................................................. 22
5.1 LCD Panel and LED ..................................................................................................................... 22
5.2 User Interface Introduction ...................................................................................................... 23
5.3 System Configuration ................................................................................................................ 27
5.4 Error Message ............................................................................................................................. 28
5.5 Wi-Fi Reset & Wi-Fi Reload ......................................................................................................... 28
5.6 Precaution for Initial Startup ................................................................................................... 29
5.7 Special Adjustable Setpoints ................................................................................................... 29
6 Troubleshooting ....................................................................................................... 30
7 Technical Parameters & Block Diagram .................................... 32
7.1 Technical Parameters ............................................................................................................... 32
7.2 Block Diagram ............................................................................................................................ 35
8 Caution ................................................................................................................................. 36
8.1 Clearing the FAN ........................................................................................................................ 36
8.2 Checking the DC Switch ........................................................................................................... 37
8.3 Checking the Electrical Connection ....................................................................................... 39

This manual contains important instructions for SMT series inverter that must be followed during
inverter installation.
The SMT series for three MPPT, Three-Phase solar inverter without transformer, consisting of:
GW12KLV-MT, GW15KLV-MT, GW20KLV-MT, GW25K-MT, GW29.9K-MT, GW30K-MT and GW36K-MT
model types.
SMT Series have been designed and tested strictly according to international safety regulations.
As electrical and electronic equipment, safety instructions related to them must be complied
with during installation, commissioning and operation. Incorrect or improper work may result in
damage to:
1. The life and well-being of the operator or third parties.
2. The inverter and other properties that belong to the operator or a third party.
The following safety instructions must be read and adhered to prior to any work and at all times.
All detailed work-related safety warnings and notes will be specified at the critical points in the
corresponding chapter.
All installation and electrical work must be performed only by qualified and licensed personnel
that have been specially trained.
• Completely read through and understood the manual and related documents.
• Be familiar with safety requirements for electrical systems.
The inverter must be installed and maintained by professionals in compliance with local electri-
cal standards, regulations and the requirements of local power authorities or companies.
• Improper handling of this device poses a risk of injury.
• Always follow the instructions contained in the manual when moving or positioning the invert-
er.
• The weight of the equipment can cause injuries, serious wounds or bruises if improperly han-
dled.
• Please install equipment in a place beyond children’s reach.
• Prior to installing and maintaining the inverter, it is crucial to make certain that the inverter is
not electrically connected.
• Before maintaining the inverter, first disconnect the connection between the AC grid and the
inverter. Then, disconnect the DC input from the inverter Wait at least 5 min after these discon-
nections in case of electric shock.
• All cables must be firmly attached, undamaged, properly insulated and adequately dimen-
sioned.
• The temperatures of some parts of the inverter may exceed 60 ℃ during operation. To avoid
being burned, do not touch the inverter during operation. Let it cool before touching it.
• Opening the front cover of the inverter without permission is not allowed. Users should not
touch or replace any components of the inverter except the DC / AC connectors. The manufac-
turer will not bear any responsibilities or consequences caused by unauthorized actions that
lead to injury or damage.
• Static electricity can damage electronic components. Appropriate methods must be adopted to
prevent such damages to the inverter. Otherwise, the inverter may be damaged, and the
warranty will be voided.
• Ensure that the output voltage of the proposed PV array is lower than the maximum rated input
voltage of the inverter. Otherwise, the inverter may be damaged, and the warranty will be
voided.
• If the equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
• When exposed to sunlight, the PV array will generate a very high voltage that can cause
electrical shock hazard. Please strictly follow the instructions we provide.
• PV modules should have an IEC61730 class-A rating.
• Prohibit inserting or pulling the AC or DC terminals when the inverter is operational. Otherwise,
the inverter will be destroyed.
Only DC connectors provided by the Manufacturer are permitted for use. Otherwise, the inverter
may be damaged, and the warranty will be voided.
• The inverter can exclude the possibility of DC residual currents to 6 mA in the system, where an
external RCD is required in addition to the built-in RCMU. A type-A RCD must be used to avoid
tripping.
• The default photovoltaic module is not grounded.
• It is recommended to add a fuse when there are more than two PV string inputs into one MPPT.
The IP65 machine is completely sealed until use. Please install it within one day after
unpacking, otherwise please block the unconnected port and do not open it to ensure that
the machine is not exposed to water, moisture and dust.
To our inverter product, GOODWE provides a standard manufacturer’s warranty, which comes
with the product and a prepaid warranty extension solution to our customer. You can find the
details about the terms and solutions from the below link.
https://en.goodwe.com/warranty.asp
2 Safety Measures & Warning
Failure to observe warnings indicated in this manual may result in
injury.
Recyclable materials
Danger of high voltage & electric shock
This side up - The package must always have the arrows point up
Special disposal instructions
Refer to operation instructions
CE mark.
1 Symbols
Don't touch, hot surface!
No more than six (6) identical packages be stacked on each other.
Fragile
Wait at least 5 min after disconnecting the inverter before touching
internal parts
Keep Dry
6
5min
01 02

SMT series GW12KLV-MT, GW15KLV-MT,GW20KLV-MT,GW25K-MT,GW29.9K-MT, GW30K-MT and
GW36K-MT support four different types(TN-S,TN-C,TN-C-S, TT) of grid. please refer to the below
figure.
3 Product Introduction
3.1 Intended Usage
The SMT series is is a Four MPPT, three-phase transformer-less grid-connected inverter that is a
crucial unit between the PV string and the utility grid in the PV power system.
The inverter converts DC generated by the PV module into AC, which conforms to parameters of
the local utility grid and is fed into the utility grid. The intended usage of the inverter is illustrated
in the below figure.
kW.H
A B C D
The inverter cannot be connected to the PV module, because the positive or negative
terminal should be grounded, except when a transformer has been used between the
inverter and the grid.
Item
A
B
C
D
Description
PV string
Inverter
Meter device
Utility grid
Note
Monocrystalline silicon, polycrystalline silicon and others.
MT Series
Meter cupboard with distributed generation system
TN-S, TN-C, TN-C-S, TT, IT
(different Model types with different types of utility grid as below)
TN-S TN-C TN-C-S TT
L1
L2
L3
N
PE
PE
Transformer
Inverter
Transformer
L1
L2
L3
PEN
PE
Inverter
L1
L2
L3
N
PE
Transformer
PE
Inverter
L1
L2
L3
N
Transformer
PE
Inverter
This manual contains important instructions for SMT series inverter that must be followed during
inverter installation.
The SMT series for three MPPT, Three-Phase solar inverter without transformer, consisting of:
GW12KLV-MT, GW15KLV-MT, GW20KLV-MT, GW25K-MT, GW29.9K-MT, GW30K-MT and GW36K-MT
model types.
SMT Series have been designed and tested strictly according to international safety regulations.
As electrical and electronic equipment, safety instructions related to them must be complied
with during installation, commissioning and operation. Incorrect or improper work may result in
damage to:
1. The life and well-being of the operator or third parties.
2. The inverter and other properties that belong to the operator or a third party.
The following safety instructions must be read and adhered to prior to any work and at all times.
All detailed work-related safety warnings and notes will be specified at the critical points in the
corresponding chapter.
All installation and electrical work must be performed only by qualified and licensed personnel
that have been specially trained.
• Completely read through and understood the manual and related documents.
• Be familiar with safety requirements for electrical systems.
The inverter must be installed and maintained by professionals in compliance with local electri-
cal standards, regulations and the requirements of local power authorities or companies.
• Improper handling of this device poses a risk of injury.
• Always follow the instructions contained in the manual when moving or positioning the invert-
er.
• The weight of the equipment can cause injuries, serious wounds or bruises if improperly han-
dled.
• Please install equipment in a place beyond children’s reach.
• Prior to installing and maintaining the inverter, it is crucial to make certain that the inverter is
not electrically connected.
• Before maintaining the inverter, first disconnect the connection between the AC grid and the
inverter. Then, disconnect the DC input from the inverter Wait at least 5 min after these discon-
nections in case of electric shock.
• All cables must be firmly attached, undamaged, properly insulated and adequately dimen-
sioned.
• The temperatures of some parts of the inverter may exceed 60 ℃ during operation. To avoid
being burned, do not touch the inverter during operation. Let it cool before touching it.
• Opening the front cover of the inverter without permission is not allowed. Users should not
touch or replace any components of the inverter except the DC / AC connectors. The manufac-
turer will not bear any responsibilities or consequences caused by unauthorized actions that
lead to injury or damage.
• Static electricity can damage electronic components. Appropriate methods must be adopted to
prevent such damages to the inverter. Otherwise, the inverter may be damaged, and the
warranty will be voided.
• Ensure that the output voltage of the proposed PV array is lower than the maximum rated input
voltage of the inverter. Otherwise, the inverter may be damaged, and the warranty will be
voided.
• If the equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
• When exposed to sunlight, the PV array will generate a very high voltage that can cause
electrical shock hazard. Please strictly follow the instructions we provide.
• PV modules should have an IEC61730 class-A rating.
• Prohibit inserting or pulling the AC or DC terminals when the inverter is operational. Otherwise,
the inverter will be destroyed.
Only DC connectors provided by the Manufacturer are permitted for use. Otherwise, the inverter
may be damaged, and the warranty will be voided.
• The inverter can exclude the possibility of DC residual currents to 6 mA in the system, where an
external RCD is required in addition to the built-in RCMU. A type-A RCD must be used to avoid
tripping.
• The default photovoltaic module is not grounded.
• It is recommended to add a fuse when there are more than two PV string inputs into one MPPT.
The IP65 machine is completely sealed until use. Please install it within one day after
unpacking, otherwise please block the unconnected port and do not open it to ensure that
the machine is not exposed to water, moisture and dust.
To our inverter product, GOODWE provides a standard manufacturer’s warranty, which comes
with the product and a prepaid warranty extension solution to our customer. You can find the
details about the terms and solutions from the below link.
https://en.goodwe.com/warranty.asp
03 04

When neutral wire of inverter is not connected to grid, ‘ Delta Grid’ should be selected in grid
type (IT) setting page.
IT
L1
L2
L3
Transformer
PE
Inverter
3.2 Inverter Overview
SMT series inverter illustration.
3.2.2 DC Switch
The DC switch is designed so that the DC input can be disconnected safely.
The inverter works automatically when the input and output meet requirements. Rotating the DC
switch to the ‘OFF’ position will immediately cut off the flow of DC current. Rotate the DC switch
to the ‘ON’ position before starting the inverter.
3.3 Technical Description
3.3.1 Principle Description
PV string voltage is transmitted to the DC BUS via the BOOST circuit.
The SMT series is equipped with three MPPTs for six DC inputs to ensure that the maximum
power is utilized even in different PV installation condition.
The DC / AC converter circuit converts DC power into AC power, which can be fed into the utility
grid. Protective circuits are designed to protect inverter and human safety.
DC switch is integrated to allow for a safe disconnection from the DC input. The inverter provides
a standard interface RS485, Wi-Fi / GPRS (optional) for communications. Inverters also provide a
running recode data display with parameter configuration via LCD panel. For the main block
diagram, please refer to ‘7.2 Block Diagram’.
Note: The figures are shown here for reference only, actual product you receive may differ.
Item
1
2
3
4
5
6
7
8
9
10
11
Name
DC Switch (Optional)
PV Input Terminal
Wi-Fi / GPRS Port (Optional)
RS485 & DRED
Communication Port
AC output Terminal
Fans
External Protection
Grounding Terminal
Indicator Light
LCD
Buttons
Air Outlet
Description
During normal operation, it is in the ‘ON’ state. It can shut down
the inverter after it is disconnected from the grid by the AC breaker.
For PV string connection
Wi-Fi/GPRS for connection
For RS485 and DRED Communication
For AC cable connection
There are three fans to perform controlled forced-air cooling.
Second protection earth terminals as specified in EN50178.
Display the state of the inverter
Inverter operation data viewing and parameter configuration.
For configuration and viewing parameters.
Exit of hot air during the inverter operation.
3.3.2 Function Description
Inverter functions can be grouped as follows:
1. Conversion function
Inverter converts DC power into AC power, which conforms to the grid requirement of its
installation country.
2. Data storage and display
Inverter stores the running information and fault records and displays them on the LCD screen.
3. Parameter configuration
Inverter provides various parameter configurations for optional operation.
4. Communication interface
Inverter provides standard RS485 & DRED communication interface. Wi-Fi (optional) can be
provided.
5. Protection functions
＞Insulation resistance to ground surveillance.
＞Input voltage monitor
＞Residual current monitoring unit
＞Anti-islanding protection
＞PV array string fault monitoring
＞DC switch
＞DC SPD
＞AC SPD
＞SPD fault monitoring
＞AC over current protection
＞Insulation monitoring
3.4 Package
3.4.1 Unpacking and Inspection
The unit is thoroughly tested and strictly inspected prior to delivery. Damage may occur during
shipping.
1. Check the package for any visible damage upon receipt.
2. Check the inner contents for damage after unpacking.
3. Check the Package list and it is shown as below:
① DC Switch (optional)
② PV Input Terminal
③ Wi-Fi / GPRS Port (optional)
④ RS485 & (Demand response
enabling device) DRED
Communication Port
⑤ AC Output Terminal
⑥ Fans
⑦ External Protection
Grounding Terminal
⑧ Indicator Light
⑨ LCD
⑩ Buttons
⑪ Air Outlet
① DC Switch (optional)
② PV Input Terminal
③ Wi-Fi / GPRS Port (optional)
④ RS485 & (Demand response
enabling device) DRED
Communication Port
⑤ AC Output Terminal
⑥ Fans
⑦ External Protection
Grounding Terminal
⑧ Indicator Light
⑨ Air Outlet
480
480
200
590
With LCD
Without LCD
1 2 3 4 5
6 7
1 2 3 4 5
6 7
8
8
11
200
590
9
10
9
05 06

3.2.2 DC Switch
The DC switch is designed so that the DC input can be disconnected safely.
The inverter works automatically when the input and output meet requirements. Rotating the DC
switch to the ‘OFF’ position will immediately cut off the flow of DC current. Rotate the DC switch
to the ‘ON’ position before starting the inverter.
3.3 Technical Description
3.3.1 Principle Description
PV string voltage is transmitted to the DC BUS via the BOOST circuit.
The SMT series is equipped with three MPPTs for six DC inputs to ensure that the maximum
power is utilized even in different PV installation condition.
The DC / AC converter circuit converts DC power into AC power, which can be fed into the utility
grid. Protective circuits are designed to protect inverter and human safety.
DC switch is integrated to allow for a safe disconnection from the DC input. The inverter provides
a standard interface RS485, Wi-Fi / GPRS (optional) for communications. Inverters also provide a
running recode data display with parameter configuration via LCD panel. For the main block
diagram, please refer to ‘7.2 Block Diagram’.
3.3.2 Function Description
Inverter functions can be grouped as follows:
1. Conversion function
Inverter converts DC power into AC power, which conforms to the grid requirement of its
installation country.
2. Data storage and display
Inverter stores the running information and fault records and displays them on the LCD screen.
3. Parameter configuration
Inverter provides various parameter configurations for optional operation.
4. Communication interface
Inverter provides standard RS485 & DRED communication interface. Wi-Fi (optional) can be
provided.
5. Protection functions
＞Insulation resistance to ground surveillance.
＞Input voltage monitor
＞Residual current monitoring unit
＞Anti-islanding protection
＞PV array string fault monitoring
＞DC switch
＞DC SPD
＞AC SPD
＞SPD fault monitoring
＞AC over current protection
＞Insulation monitoring
Positive DC Plug [1]Inverter Backboard Negative DC Plug [1] Connecting Terminal
Fixed Screw
RS-485 & DRED
Communication
Terminal Grounding ScrewExpansion BoltSafe Screw
PE Terminal AC Cover Wi-Fi Module [2]
Quick Installation
Instruction
Wi-Fi Configuration
Instruction
User’s Guide of
SolarGo App
SolarGo
[1] Positive & Negative DC plug: 6 pairs.
[2] For Wi-Fi communication or inverter without LCD
[3] For system configuration of inverter without LCD
3.4 Package
3.4.1 Unpacking and Inspection
The unit is thoroughly tested and strictly inspected prior to delivery. Damage may occur during
shipping.
1. Check the package for any visible damage upon receipt.
2. Check the inner contents for damage after unpacking.
3. Check the Package list and it is shown as below:
07 08

4.2 Equipment Installation
4.2.1 Select the Installation Location
1. Take the bearing capacity of the wall into account. The wall (e.g. concrete and metal) should
be strong enough to hold the weight of the inverter for a long period of time.
2. Install the unit where it is accessible to service or do the electrical connection.
3. Do not install the unit on the wall of flammable material.
4. Ensure the installation location is well ventilated.
5. Inverters should not be installed near flammable or explosive items. Any strong electromag-
netic forces should be kept away from installation site.
6. Install the unit at eye level to for convenient operation and maintenance.
7. Install the unit vertically or tilted backwards of no more than 15º. The wiring area should face
downwards. Horizontal installation requires an elevation of more than 250mm.
Max
15°
To ensure heat dissipation and convenient disassembly, the minimum clearance around the
inverter should not be less than the following values:
The upward part
The downward part
The front part
Both sides
Interval
------------ 200mm
-------- 500mm
---------------- 500mm
-------------------- 600mm
----------------------- 1200mm
500mm
1200mm600mm 600mm 500mm
200mm
Backboard Installation
Expansion Screw
4.2.2 Mounting Procedure
1. Use the wall-mounting bracket as a template and drill 6 holes on the wall: 13mm diameter and
65mm deep.
2. Fix the wall-mounting bracket to the wall with using the expansion bolts in accessory bag.
3. Carry the inverter with the handles on both sides of the inverter chassis.
4. Place the inverter on the wall-mounting bracket as illustrated.
360mm
412mm
360mm
Note: Two mounting holes in the middle of the wall-mounting
bracket are only used for single column installation; other
environments may not be used.
4 Installation
4.1 Mounting Instructions
1. In order to achieve optimal performance, the ambient temperature should be lower than 45℃.
2. For easy maintenance, we suggest installing the inverter at eye level.
3. Inverters should not be installed near flammable or explosive items. Strong electromagnetic
forces should be kept away from installation site.
4. Product label and warning symbols should be placed at a location that is easy to read by the
users.
5. Be sure to install the inverter at a place where it is protected from direct sunlight, rain and snow.
Accumulated
snow
Keep away
from sunlight Keep dry Keep it clear
of snow Sun Rain
09 10

4.3.2 AC Circuit Breaker and Residual Current Device
An independent three- or four-pole circuit breaker for each inverter must be installed at the
output side to ensure that the inverter can be securely disconnected from the grid.
Note: It is not allowed for several inverters to use the same circuit breaker. It is not allowed to
connect loads between inverter and circuit breaker.
The internal integrated residual current detection device (RCD) of the inverter can detect external
leakage current in real time. When a leakage current value exceeds the limit value, the inverter will
be disconnected from the grid as soon as possible. If an external RCD is installed, the action
current should be 500 mA or higher.
4.3.3 Earth Terminal Connection
The inverter is equipped with an earth terminal according to the requirement of EN 50178.
All non-current carrying exposed metal parts of the equipment and other enclosures in the PV
power system must be grounded.
Please follow the steps below to connect ‘PE’ cable to the ground.
Output Current
31.5A
40A
54.5A
40A
43.3A
48A
53.3A
Inverter Model
GW12KLV-MT
GW15KLV-MT
GW20KLV-MT
GW25K-MT
GW29.9K-MT
GW30K-MT
GW36K-MT
Recommended Nominal Current of AC Breaker
＞40A
＞50A
＞68A
＞50A
＞55A
＞60A
＞66A
AC cable illustration:
Value
22‒30mm
10‒25mm²(It is recommended to use 16mm² copper wire)*
About 20mm
About 45mm
Grade
A
B
C
D
Description
O.D
Section area of conduction material (mm2)
Length of bare wire
Length of wire
A B
D
Annealed copper wire
C
*If you choose aluminium wire, please contact the service provider for the aluminium terminal.
4.3 Electrical Connection
4.3.1 Connection to Grid (AC Side Connection)
1. Measure the voltage and frequency of the grid-connected access point and ensure it meets the
grid connection standard of the inverter.
2. It is recommended to add a breaker or fuse to the AC side. The specification should be more
than 1.25 times that of the rated of AC output current.
3. The PE line of inverter should be connected to the earth. Ensure that the impedance between
the neutral wire and earth wire is less than 10Ω.
4. Disconnect the breaker or fuse between the inverter and the utility.
5. Connect the inverter to the grid as follows:
• The wiring installation method on the AC output side is shown in the below figure.
• Fix (Torque: 1.2‒2N.m) the connector of AC cable to the corresponding terminals.
• Neutral conductor should be blue; line conductor should be black or brown (preferred); pro-
tective earth bonding line should be yellow-green.
• The AC line construction shall be such that, if the cord should slip in its anchorage, placing a
strain on conductors, the protective earthing conductor will be the last to take the strain.
The crimping pliers secure the line.
Tighten the nut
Tighten the screws
(Torque: 2‒2.3N.m)
20
20
L1 ----- Live Wire 1
L2 ----- Live Wire 2
L3 ----- Live Wire 3
N ----- Neutral Wire
PE ----- Earth Wire
L1
L2 = L1 + (1~2mm)
Step 1
Strip the wire insulation sheet of a suitable length with a wire stripper.
Step 2
Insert the stripped wire into the terminal and compress it tightly using crimping pliers.
11 12

4.3.4 Connecting Inverter to PV Panel
Caution
Ensure the DC switch is turned off before connecting the PV string to the inverter.
Ensure the PV string polarity confirms with the DC connector. Otherwise, it will damage the
inverter.
Ensure the maximum open-circuit voltage (Voc) of each PV string does not exceed the maximum
input voltage of the inverter under any condition (1100V).
Ensure that the maximum short circuit current of each DC input is less than the inverter’s
allowable limit.
Do not connect positive or negative pole of PV string to the earth (PE terminal). Otherwise, it will
destroy the inverter.
Positive wire shall be red, negative wire shall be black.
The minimum insulation resistance to ground of the PV panels must exceed 33.7kΩ. There is a
risk of shock if the required minimum resistance is not met.
The SMT series has three PV input areas: PV1 input, PV2 input and PV3 input. Each has an MPPT
tracker. Therefore, the three PV inputs can differ, including the type of module, the numbers of
connecting PV strings and the orientation angles of PV modules.
There are four types of DC connectors: DEVALAN, MC4, AMPHENDL H4 and QC4.10 series.
Inverter side
Positive plug
Negative plug
PV TOOL
Please use special tools to do crimping
MC4 & QC4.10 DEVALAN & AMPHENOL
Do not crimp wire
into the limit buckle.
Negative connector
Positive connector
Inverter side
A
B
C
DEVALAN SERIES MC4 SERIES
AMPHENOL SERIES QC4.10 SERIES
Note: The actual DC connector used is as shown in the accessory box.
DC cable specification:
Value
4~5 mm
2.5~4 mm2
About 7 mm
Label
A
B
C
Description
External diameter of wire stock
Cross-sectional area of conductor material
Length of bare wire
AB
C
The installation method of the DC connector is shown in the two figures below.
NO.
A
B
C
Name
Cold-pressed terminal
Screw
Green & Yellow Cable
Explanation
M5*12
10~16mm2
Step 3
Fix the earth wire on the machine.
To improve the corrosion resistance of the terminal, it is recommended to apply silica
gel on the earth terminal for corrosion protection after the grounding cable assembly is
completed.
13 14

4.4 Communication Connection
Inverter operation data can be transferred via RS485 or Wi-Fi module to a PC using monitoring
software or a data logger device, such as Ezlogger Pro. RS485 is the standard communication
choice for the inverter. The Wi-Fi module can be used optionally for communication.
4.4.1 RS485 / DRED / Remote Shutdown Communication
The communication cable must be separated from other power cables to prevent communica-
tion interference. For RS485 connections, please refer to the figure below.
Inverter
RS485
EzLogger Pro
RS485RS485
PCRouter
Internet
Inverter Inverter
To better dustproof and waterproof the internal inverter, all DC connectors provided by accessory
bag should be connected to the inverter. If only some of the DC connectors are used, the DC
connectors without connections should be blocked with a non-conductive insulator.
Plug with PV waterproof plug
RS-485
DRED
RS-485
RS-485
RS-485
Remote shutdown
(Optional)
RS485
DRED (Optional)
RS485
RS-485
RS485
RS-485
DRED
The RS485 port of inverter is used to connect the EzLogger Pro, and the total length of connect-
ing cable should not exceed 1000m.
DRED is only for Australian and New Zealand installations, in compliance with Australian and
New Zealand safety requirements. DRED is not provided by the manufacturer. DRM function is
achieved by Ezlogger Pro or DRED COM port. Please connect the Ezlogger Pro to the RS485 port.
For detailed DRED connection instructions, refer to the Ezlogger Pro manual.
Remote shutdown is only for European installations, in compliance with European safety
requirements. A remote shutdown device is not provided by manufacturer.
DRED should be connected to the COM port with 6-Pin and remote shutdown to the COM port
with 2-Pin as illustrated below.
15 16

For 5-Pin terminal Single Hole Seal Ring
Screw Cap The Insulator
Step 2
Dismount the terminal.
Note: There is an 2-Pin terminal in the accessory box.
For 6-Pin terminal Single Hole Seal Ring
Screw Cap The Insulator
For 2-Pin terminal Single Hole Seal Ring
Screw Cap The Insulator
Please follow the steps below to complete the connection.
Step 1
Unplug the terminal.
Step 4
Put the cable through the plate.
Different cable and connection method should be applied for different functions. Please
follow the connection steps in accordance to the function in need.
6.5mm
25mm
Function
DRM1/5
DRM2/6
DRM3/7
DRM4/8
REFGen
Com/DRM0
NO.
1
2
3
4
5
6
Connection of DRED
Please connect the cables in order as shown in the right table.
No.
1
2
3
4(PE)
5(N)
Function
485-A1
485-B1
485-A1
485-B1
GND
5-Pin
No.
1
2
3
4
5
6
Function
485-A1
485-B1
485-A1
485-B1
485-A2(Reserved)
485-B2(Reserved)
6-Pin
6.5mm
25mm
5-Pin
6-Pin
Connection of RS485
Please connect the cables in order as shown in the right table.
Step 3
Dismantle the resistor or shortcircuit cable.
Note: The figure shown is 6-Pin termianl. Resistor
17 18

Figure 4.4.1‒3
Caution
Cable requirements of RS485 communication: shielded twisted-pair cable or shielded
twisted-pair.
Ethernet cable 120Ω termination resistor is controlled via dip switch. ‘ON’ means connected
and ‘OFF’ means disconnected, illustrated as the above figure.
Selection mode of terminal resistance dial switch with 120Ω.
• When single inverter is in communication mode, dial the terminal resistance dial switch to the
‘ON’ state (default is ‘OFF’) next to the RS485 communication port. Ensure that the RS485
terminal is set to 120Ω and single-point ground the shielding layer of the communication, as
shown in the last figure.
• If multiple inverters are in communication, connect all inverters in a daisy chain through the
RS485 communication cable. For the device at the end of daisy chain, dial the terminal resistance
No.
1(+)
2(-)
Function
SC-A
SC-B
6.5 mm
25 mm
Connection of Remote shutdown.
Please connect the cables in order as shown in the right table.
1
2
Step 5
Connect the terminal to the right position onto the inverter.
dial switch to the ‘ON’ state (default is OFF) and single-point ground the shielding layer of the
communication line.
As shown in Figures 4.4.1‒3, waterproof covers should be removed first if remote shutdown
function and RS485 communication are needed. To enable the remote shutdown function, the
short-circuit pin should be removed and cables for remote shutdown function should be connect-
ed. Please do not remove the short-circuit pin or waterproof cover if the remote shutdown
function is not required. The inverters with an RS485 port or both RS485 & DRED ports are slightly
different, as shown in Figure 4.4.1‒4.
4.4.2 Wi-Fi Communication
The Wi-Fi Communication function is only enabled by the Wi-Fi Module. For detailed configura-
tion instructions, refer to ‘Wi-Fi Configuration Instruction’ in the accessory box.
After the configurations are completed, please register on the website: www.goodwe.com.
The Wi-Fi module installation of the SMT series is shown in the below figure.
Figure 4.4.1‒4
Note: The name and password of the Wi-Fi cannot use symbols; only use Arabic numerals or
uppercase / lowercase letters.
19 20

SEMS Portal App
5 System Operation
5.1 LCD Panel And LED
As a human‒computer interaction interface, the LCD display panel comprises LED indicators,
buttons and an LCD display on the front panel of the inverter.
The LED screen indicates the working status of the inverter.
BButtons and the LCD are used for configuration and viewing parameters.
LED panel is shown as below.
Enter
Up
ESC
Down
Explanation
ON = Equipment powered-on
OFF = Equipment powered-off
ON = Inverter is feeding power
OFF = Inverter is not feeding power
Single Slow Flash = Self check before grid connects
Single Flash = Connecting / active
On = Wireless connected / active
Blink 1 = Wireless system resetting
Blink 2 = Wireless router problem
Blink 4 = Wireless server problem
Blink = RS485 Connected
OFF = Wireless not active
On = Fault occurred
OFF = No fault
StatusIndicator
Green / green /green / red light respectively corresponds to:
4.4.2 Earth Fault Alarm
The inverter complies with IEC62109-2 13.9. When an earth fault occurs, the buzzer in EzLogger Pro
will ring for 1 min and an LED will light for 1 min. The alarm will ring again in half an hour unless the
fault is resolved.
4.4.4 SEMS Portal
The SEMS Portal is an online monitoring system. After completing the installa-
tion of the communication connection, access www.semsportal.com or
download the App by scanning the QR code to monitor your PV plant and device.
Please contact the after-sales for more operation options of the SEMS Portal.
21 22

Device Info
History Info
Advanced
Basic
Language
Date&Time
Communication
Country Code
Set Language
Set Date & Time
Set Address
Power Limit
PF Value
CT Ration
Shadow
LVRT
Set Power Limit
Set PF Value
Set CT
Set Shadow
Set LVRT
HVRT
Grid Type
Set HVRT
Set Grid
Password Reset Password
Factory Data
Reset
Reset Factory
Data
Verify Password
Select Data
Select Data
Select Data
Select Data
Grid Connection Connection Set
View Error Log
Second-level MenuFirst-level Menu Third-level Menu
Day
Month
Year
Error Log
Country Code SetCountry Code
Home Hour
Configuration
Running Info
Country Code
Set
NOTE:
Download SolarGo App from Google Play Store or Apple App Store to
complete the system operation if the inverter has no screen. You can
also scan the QR code to download it.
SolarGo APP
5.3 User Interface Introduction
①: Communication information icon:GPRS and Wi-Fi show the signal strength, RS485 shows the
communication address.
②: Communication icon: The method of communication. These include GPRS, Wi-Fi LAN and
RS485.
③: LVRT / HVRT icon: The icon indicates that the system LVRT / HVRT function is on
④: Grid Type icon: The icon indicates that the system has selected Delta Grid / Star Grid
⑤: Power limit icon: The power-limit icon indicates that the Power-limit function is on
⑥: Shadow scan: The icon indicates that the shadow-scan function is on
⑦: Safety icon:The number represents the safety country number
⑧: Real-time power
⑨: E-day: Daily generation
⑩: E-Total: Total generation
⑪: System date and time
⑫: System status information
⑬: Carbon: Energy conservation and emission reduction
01/01/2020 00:00:00
CARBON
Normal
kW
x
36.00
20.5kWH
Wi-Fi 22
93.3kWH 4
① ② ④③ ⑤ ⑥ ⑦
⑧
⑨
⑪
⑩
⑬
⑫
E-TOTALE-DAY
23 24

5.3.1 Overview of Menu Architecture
The display menu has a total of three levels. Use the ‘Up’ ‘Down’ ‘enter’ ‘ESC’ button to
operate the menu. The ‘enter’ button has two operating methods: long press (greater than 3 s)
and short press. In summary, it has 5 buttons in total for operating the menu.
Press the ‘Enter’ / ‘ESC’ to enter / exit the each menu level; use the ‘Up’ / ‘Down’ to
select the item and change the parameters; and long-press the ‘Enter’ (greater than 3s) to set
the parameters.
5.3.2 First-level Menu
The first-level menu interface through the up- and down-button cycle. In the historical informa-
tion, configuration and advanced settings interface, pressing the ‘enter’ button will enter the
second-level menu. To enter this menu, select the item from the up and down buttons. Press
‘enter’ to enter ‘project setup’ menu. Go to the third-level menu, change the setting contents
by pressing the up and down buttons. Press the ‘enter’ button to set the contents. If country
safety setting is not selected (shows ‘Configure Safety’ on the display at the home page), press
any button to enter the country safety setting page.
01/01/2020 00:00:00
CARBON
Fault
Utility Loss
0.0kWH
Basic Advanced
Wi-Fi 22
105.3kWH 4
E-TOTALE-DAY
01/01/2020 00:00:00 Fault
Wi-Fi Configuration 22
Basic Advanced
01/01/2020 00:00:00 Fault
Wi-Fi Configuration 22
Vac1/2/3 0.0/0.0/0.0V
Iac1/2/3 0.0/0.0/0.0A
Fac1/2/3 0.00/0.00/0.00Hz
Vpv1/2/3 0.0/0.0/0.0V
Ipv1/2/3 0.0/0.0/0.0A
Istr1/2/3 0.0/0.0/0.0A
Istr4/5/6 0.0/0.0/0.0A
01/01/2020 00:00:00 Fault
Wi-Fi Running Info 22
MODEL: GW36K-MT
VERSION: V1.01.01.01
SERIAL NO.: 9036KMTU189R9997
Wi-Fi Device Info 22
01/01/2020 00:00:00 Normal 01/01/2020 00:00:00 Fault
Wi-Fi History Info 22
Hour Day
2020-01-01
36kWh
1.0
0.8
0.6
0.4
0.2
0
4 6 8 10 12 14 16 18 20
Month Year
5.4 System Configuration
5.4.1 Basic Settings
Basic Settings is mainly used to set commonly used parameters, including language settings, time
settings, communication settings and safety settings for projects. These parameters can be set by
using the App.
Wi-Fi ReloadWi-Fi Reset
01/01/2020 00:00:00 Fault
Wi-Fi Wi-Fi Set 22
Wi-Fi 22
01/01/2020 00:00:00 Fault
Communication
Modbud Address
Wi-Fi Set
Year
Hour Minute
Month Day
Basic Advanced
01/01/2020 00:00:00 Fault
Wi-Fi Configuration 22
Basic Advanced
01/01/2020 00:00:00 Fault
Wi-Fi Configuration 22
01/01/2020 00:00:00 Fault
Save
Save OK
Wi-Fi 22 Wi-Fi 22
01/01/2020 00:00:00 Fault
Configuration
Language
Data & Time
Communication
Country Code
Grid Connection
Wi-Fi 22
01/01/2020 00:00:00 Fault
Configuration
Language
Data & Time
Communication
Country Code
Grid Connection
Wi-Fi 22
01/01/2020 00:00:00 Fault
Configuration
Language
Data & Time
Communication
Country Code
Grid Connection
Wi-Fi 22
01/01/2020 00:00:00 Fault
Configuration
Language
Data &Time
Communication
Country Code
Grid Connection
Wi-Fi 22
01/01/2020 00:00:00 Fault
Country Code
Holland
Northlreland
ChinaHigher
France 50 Hz
France 60 Hz
Wi-Fi 22
01/01/2020 00:00:00 Fault
Country Code
Holland
Northlreland
ChinaHigher
France 50 Hz
France 60 Hz
Wi-Fi 22
01/01/2020 00:00:00 Fault
Language
Wi-Fi 22
01/01/2020 00:00:00 Fault
Data&Time
Wi-Fi 22
01/01/2020 00:00:00 Fault
Communication
01/01/2020 00:00:00 Fault
Wi-Fi Modbud Address 22
Wi-Fi 22
01/01/2020 00:00:00 Fault
Configuration
Language
Data & Time
Communication
Country Code
Grid Connection
Wi-Fi 22
01/01/2020 00:00:00 Fault
Grid Connection
Disconnected
Connect
Wi-Fi 22
01/01/2020 00:00:00 Fault
Configuration
Error Log
Wi-Fi
01/01/2020 00:00:00 Fault
Error Log P01/01
Utility Loss 2020-01-01 00:00:00
中文
English
Portuguese
Turkish
Modbud Address
Wi-Fi Set
25 26

5.4.2 Advanced Settings
User must enter password to operate advanced settings because permission is required.
Note: Initial password： ‘1111’
Advanced Settings include nine settings: 1. Power limit; 2. CT ratio; 3. Power factor; 4. Shadow
scanning; 5. Low pressure crossing; 6. High pressure crossing; 7. Type of power grid; 8. Reset the
password; and 9. Recovery parameters.
Wi-Fi 22
01/01/2020 00:00:00 Normal
Adv.Settings
Power Limit
CT Ration
PF Value
Shadow
LVRT
Wi-Fi 22
01/01/2020 00:00:00 Normal
Adv.Settings
Power Limit
CT Ration
PF Value
Shadow
LVRT
Wi-Fi 22
01/01/2020 00:00:00 Normal
Adv.Settings
Power Limit
CT Ration
PF Value
Shadow
LVRT
Wi-Fi 22
01/01/2020 00:00:00 Normal
CT Ration
CT 40
CT 200
CT 3000
CT Unknown
Wi-Fi 22
01/01/2020 00:00:00 Normal
Grid Type
Delta Grid
Star Grid
Wi-Fi 22
01/01/2020 00:00:00 Normal
Power Limit
OFF
ON
Wi-Fi 22
01/01/2020 00:00:00 Normal
Adv.Settings
Power Limit
CT Ration
PF Value
Shadow
LVRT
Wi-Fi 22
01/01/2020 00:00:00 Normal
Shadow
OFF
ON
Wi-Fi 22
01/01/2020 00:00:00 Normal
Power Limit
OFF
ON 0%
Wi-Fi 22
01/01/2020 00:00:00 Normal
Password
01/01/2020 00:00:00 Normal
Save
Save OK
Wi-Fi 22
01/01/2020 00:00:00 Normal
Wi-Fi Power Limit Value 22
Old
New
Wi-Fi 22
01/01/2020 00:00:00 Normal
Adv.Settings
Power Limit
CT Ration
PF Value
Shadow
LVRT
Wi-Fi 22
01/01/2020 00:00:00 Normal
LVRT
OFF
ON
Basic Advanced
01/01/2020 00:00:00 Fault
Wi-Fi Configuration 22
Basic Advanced
01/01/2020 00:00:00 Normal
Wi-Fi Configuration 22
01/01/2020 00:00:00 Normal
Wi-Fi Password 22
01/01/2020 00:00:00 Normal
Wi-Fi 22 PF Value
Wi-Fi 22
01/01/2020 00:00:00 Normal
Adv.Settings
HVRT
Grid Type
Password
Factory Data Reset
Wi-Fi 22
01/01/2020 00:00:00 Normal
HVRT
OFF
ON
Wi-Fi 22
01/01/2020 00:00:00 Normal
Adv.Settings
HVRT
Grid Type
Password
Factory Data Reset
Wi-Fi 22
01/01/2020 00:00:00 Normal
Adv.Settings
HVRT
Grid Type
Password
Factory Data Reset
Wi-Fi 22
01/01/2020 00:00:00 Normal
Adv.Settings
HVRT
Grid Type
Password
Factory Data Reset
Wi-Fi 22
01/01/2020 00:00:00 Normal
Reset Factory Data
Reset Factory Data
5.4.3 History Information
The history information mainly includes information about the generating capacity of the equip-
ment, the power generation information mainly includes the amount of electricity generation,
daily power generation, monthly power generation and annual power generation information.
01/01/2020 00:00:00 Fault
Wi-Fi History Info 22
Hour Day
2020-01-01
36kWh
1.0
0.8
0.6
0.4
0.2
0
4 6 8 10 12 14 16 18 20
Month Year
Error message
SPI Failure
EEPROM R / W Failure
Fac Failure
Relay Check Failure
DC Injection High
Isolation Failure
Vac Failure
EFan Fault
PV Over Voltage
Over Temperature
IFan Fault
DC Bus High
Ground I Failure
Utility Loss
Ref 1.5V Failure
AC HCT Failure
GFCI Failure
Device Failure
Error Code
01
02
03
07, 25
13
14
15
16
17
19
20
21
22
23
30
31, 24
32, 26
Others
Description
Internal communication failure
Memory chip failure
Grid frequency out of range
Relay self-checking failure
Overhigh DC injection
Ground insulation impedance is too low
Grid voltage out of range
External fan failure
Overvoltage at DC input
Overtemperature on the case
Internal fan failure
Overhigh BUS voltage
Overhigh ground leakage current
Grid disconnection / fault
1.5V reference voltage failure
Output current sensor failure
Detection circuit of ground leakage current failure
Internal device failure
5.4 Error Message
An error message will be displayed on the LCD if a fault occurs.
27 28

6 Troubleshooting
If the Inverter does not work properly, please refer to the following instructions before contact-
ing your local service centre. If any problems arise, the red (FAULT) LED indicator on the front
panel will light up and the LCD screen will display relevant information. Please refer to the
following table for a list of error messages and associated solutions.
1. Check the impedance between Ground and PV (+) & PV (-) . The impedance
value must be greater than 100 kΩ. Ensure the inverter is grounded.
2. Contact local service office for help if the problem still persists.
1. Not connect to the grid.
2. Check if the power grid is connected to cable.
3. Check the availability of power grid.
1. Check if the PV open circuit voltage is higher or too close to the maximum
input voltage or not.
2. If the problem persists when PV voltage is less than the maximum input
voltage, contact local service office for help.
1. The internal temperature is higher than the normal value specified.
2. Reduce ambient temperature.
3. Move the inverter to a cool place.
4. If the problem persists, contact the local service office for help.
1. The ground current is too high.
2. Unplug the inputs from the PV generator and check the peripheral AC
system.
3. When the problem is cleared, reconnect the PV panel and check the Inverter
status.
4. Contact local service office for help if the problem still persist.
1. The PV Inverter will automatically restart within 5 min if the grid returns to
normal.
2. Ensure grid voltage conforms with the specification.
3. Ensure neutral (N) wire and PE wire are connected well.
4. Contact local service office for help if the problem persists.
1. Grid is not connected.
2. Check grid connection cables.
3. Check availability of grid.
Vac Failure
Fac Failure
Type of fault Troubleshooting
Ground I Failure
Isolation Failure
Over Temperature
PV Over Voltage
Utility Loss
System
Failure
Basic Advanced
01/01/2020 00:00:00
Fault
Wi-Fi Configuration
22
5.6 Precaution for Initial Start-up
1. Ensure the AC circuit is connected and that the AC breaker is turned off.
2. Ensure the DC cable between the inverter and the PV string is connected and that the PV
voltage is normal.
3. Turn on the DC switch and set the safety settings according to local regulations.
4. Turn on the AC breaker and check to see that the inverter works normally.
5.7 Special Adjustable Setpoints
The inverter has a field in which the user can set functions, such as trip points, trip times, recon-
nect times, active and inactive QU curves and PU curves. It is adjustable through special software.
If needed, please contact after-sales.
To obtain software manuals, you can download them from the official website or contact
after-sales.
5.5 Wi-Fi Reset & Wi-Fi Reload
These functions are only available for Wi-Fi model inverters.
1. Press ‘Up’ / ‘Down’ to select ‘Basic’ and press ‘Enter’.
2. Press ‘Up’ / ‘Down’ to select ‘Communication’ and press ‘Enter’.
3. Press ‘Up’ / ‘Down’ to select ‘Wi-Fi Set’ and press ‘Enter’.
4. Press ‘Up’ / ‘Down’ to select ‘Wi-Fi Reset’ / ‘Wi-fi Reload’ and long press ‘Enter’.
Wi-Fi
22
01/01/2020 00:00:00
Fault
Configuration
Language
Data&Time
Communication
Country Code
Grid Connection
Wi-Fi ReloadWi-Fi Reset
01/01/2020 00:00:00
Fault
Wi-Fi Wi-Fi Set
22
Wi-Fi 22
01/01/2020 00:00:00 Fault
Communication
Modbud Address
Wi-Fi Set
29 30

7 Technical Parameters & Block Diagram
7.1 Technical Parameters
208VAC
220VAC
240VAC
GW12KLV-MT
15600
800
200~650
180
370
25/25/25
31.3/31.3/31.3
3
2/2/2
12000
11300
12000
13100
13100
150-300
50/60
31.5
<3%
98.7%
>98.4%
GW15KLV-MT
19500
800
200~650
180
370
25/25/25
31.3/31.3/31.3
3
2/2/2
15000
14400
15000
16600
16600
150-300
50/60
40
<3%
98.7%
>98.5%
GW20KLV-MT
26000
800
200~650
180
370
25/25/25
31.3/31.3/31.3
3
2/2/2
20700
19600
20700
22600
22600
150-300
50/60
54.5
<3%
98.8%
>98.5%
Technical Data
PV String Input Data
Max. DC Input Power (Wp)
Max. DC Input Voltage (V)
MPPT Range (V)
Start-up Voltage (V)
Nominal DC Input Voltage (V)
Max. Input Current (A)
Max. Short Current (A)
No. of MPP Trackers
No. of Input Strings Per MPP Tracker
AC Output Data
Nominal Output Power (W)
Max.Output Power (W)
Max. Output Apparent Power (VA)
Nominal Output Voltage (V)
Nominal Output Frequency (Hz)
Max. Output Current (A)
Output Power Factor
Output THDi (@Nominal Output)
Efficiency
Max. Efficiency
European Efficiency
Protection
Anti-islanding Protection
Input Reverse Polarity Protection
Insulation Resistor Detection
DC Surge Protection
AC Surge Protection
Residual Current Monitoring Unit
Output Over Current Protection
Output Short Protection
Output Over Voltage Protection
AFCI
Terminal Temperature Detection
General Data
Operating Temperature Range (℃)
Relative Humidity
Operating Altitude (m）
Cooling
User Interface
Communication
Weight (kg)
Size (Width*Height*Depth mm)
Protection Degree
Night Self Consumption (W)
Topology
Certifications & Standards
Grid Regulation
Safety Regulation
EMC
~1 (Adjustable from 0.8 leading to 0.8 lagging)
Integrated
Integrated
Integrated
Type III （Type II optional）
Type III （Type II optional）
Integrated
Integrated
Integrated
Integrated
Optional
Optional
-30~60
0~100%
≤3000
Fan Cooling
LCD & LED or APP & LED
RS485 or Wi-Fi or GPRS or PLC
40
480*590*200
IP65
<1
Transformerless
Visit homepage to achieve information.
Note:
When sunlight is insufficient, the PV Inverter may continuously start up and shut down automati-
cally because of insufficient power generation by the PV panel.
1. Turn off DC switch of the inverter.
2. Wait until the inverter’s LCD light is off.
3. Turn on the DC switch and ensure it is connected.
4. If the problem persists, contact local service office for help.
1. Turn off DC switch, take off DC connector, measure the voltage of PV array.
2. Plug in DC connector and turn on DC switch.
3. If PV array voltage is lower than 250V, please check the configuration of the
inverter module.
4. If voltage is higher than 250V, please contact local office.
Type of fault Troubleshooting
Relay-Check Failure
DCI Injection High
EEPROM R / W Failure
SCI Failure
SPI Failure
DC BUS High
BUS Unbalance
GFCI Failure
Ifan Fault
Efan Fault
Afan Fault
No display
Wi-Fi module fails to
connect to network
Inverter
Failure
Others
1. If the Wi-Fi module fails to connect to the network after choosing the right
router hotspot and entering the right passwords, it is possible that there are
special characters not supported by the module in the hotspot password.
Please modify the password to consist of only Arabic numerals or uppercase /
lowercase letters.
2. If the problem persists, contact the local service office for help.
31 32

GW29.9K-MT
39000
1100
200~950
180
600
25/25/25
31.3/31.3/31.3
3
2/2/2
29900
29900
29900
400, 3L/N/PE or 3L/PE
50/60
43.3
<3%
98.80%
>98.5%
GW30K-MT
39000
1100
200~950
180
600
25/25/25
31.3/31.3/31.3
3
2/2/2
30000
33000
33000
400, 3L/N/PE or 3L/PE
50/60
48
<3%
98.80%
>98.5%
GW25K-MT
32500
1100
200~950
180
600
25/25/25
31.3/31.3/31.3
3
2/2/2
25000
27500
27500
400, 3L/N/PE or 3L/PE
50/60
40
<3%
98.70%
>98.4%
GW36K-MT
42900
1100
200~950
180
600
25/25/25
31.3/31.3/31.3
3
2/2/2
36000 [1]
36000
36000
400, 3L/N/PE or 3L/PE
50/60
53.3
<3%
98.80%
>98.5%
Technical Data
PV String Input Data
Max. DC Input Power (Wp)
Max. DC Input Voltage (V)
MPPT Range (V)
Start-up Voltage (V)
Nominal DC Input Voltage (V)
Max. Input Current (A)
Max. Short Current (A)
No. of MPP Trackers
No. of Input Strings Per MPP Tracker
AC Output Data
Nominal Output Power (W)
Max. Output Apparent Power (VA)
Max. Output Apparent Power (VA)
Nominal Output Voltage (V)
Nominal Output Frequency (Hz)
Max. Output Current (A)
Output Power Factor
Output THDi (@Nominal Output)
Efficiency
Max. Efficiency
European Efficiency
Protection
Anti-islanding Protection
Input Reverse Polarity Protection
PV String Current Monitoring
Anti-PID Function For Module
Insulation Resistor Detection
DC Surge Protection
AC Surge Protection
Residual Current Monitoring Unit
Output Over Current Protection
Output Short Protection
Output Over Voltage Protection
AFCI
Terminal Temperature Detection
General Data
Operating Temperature Range (℃)
Relative Humidity
Operating Altitude (m）
Cooling
User Interface
Communication
Weight (kg)
Size (Width*Height*Depth mm）
Protection Degree
Night Self Consumption (W)
Topology
Certifications & Standards
Grid Regulation
Safety Regulation
EMC
~1 (Adjustable from 0.8 leading to 0.8 lagging)
Integrated
Integrated
Integrated
Optional
Integrated
Type III (Type II optional)
Type III (Type II optional)
Integrated
Integrated
Integrated
Integrated
Optional
Optional
-30~60
0~100%
≤3000
Fan Cooling
LCD & LED or APP & LED
RS485 or Wi-Fi or GPRS or PLC
40
480*590*200
IP65
<1
Transformerless
Visit homepage to achieve information.
[1]: 33kW for Italy, 36kW for other country.
Note:
Overvoltage Category Definition
Category I: applies to equipment connected to a circuit where measures have been taken to
reduce transient overvoltage to a low level.
Category II: applies to equipment not permanently connected to the installation. This includes
appliances, portable tools and other plug-connected equipment.
Category III: applies to fixed downstream equipment, including the main distribution board.
This includes switchgear and other equipment in an industrial installation.
Category IV: applies to equipment permanently connected at the origin of an installation
(upstream of the main distribution board). This includes electricity meters, primary overcurrent
protection equipment and other equipment connected directly to outdoor open lines.
Moisture-location Category Definition
Environment Category Definition
Outdoor: the ambient air temperature is -20~50 ℃. Relative humidity range is 4–100%, applied
to PD3.
Indoor unconditioned: the ambient air temperature is -20~50 ℃. Relative humidity range is
5–95%, applied to PD3.
Indoor conditioned: the ambient air temperature is 0~40 ℃. Relative humidity range is 5–85%,
applied to PD2.
Pollution Degree Definition
Pollution degree 1: No pollution or only dry, non-conductive pollution occurs. The pollution has
no influence.
Pollution degree 2: Normally only non-conductive pollution occurs. However, a temporary
conductivity occasionally caused by condensation must be expected.
Pollution degree 3: Conductive pollution occurs, or dry, non-conductive pollution becomes
conductive because of condensation, which is expected.
Pollution degree 4: Persistent conductive pollution occurs, including pollution cause by conduc-
tive dust, rain and snow.
Moisture parameters
Temperature Range
Humidity Range
3K3
0~+40℃
5%~85%
4K2
-33~+40℃
15%~100%
4K4H
-20~+55℃
4%~100%
Level
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7.2 Block Diagram
SMT series main circuit is shown in the below figure:
DC
SPD
DC
SPD
DC
SPD
PV1+
PV1-
Input
EMI
Filter
PV2+
PV2-
PV3+
PV3-
DC Switch
MPPT
Circuit 1
Tri-level
DC / AC
Converter
Circuit
MPPT
Circuit 2
MPPT
Circuit 3
LC
Filter
Output
EMI
Filter
Relay
L1
L2
L3
N
AC SPD
8 Caution
Regular maintenance ensures a long operating life and optimal efficiency of the entire PV plant.
Caution: Prior to maintenance, please disconnect the AC breaker first and then disconnect DC
breaker. Wait 5 min until the residual voltage has been released.
8.1 Clearing the Fan
The SMT series inverter is equipped with three fans on its left side. The fan intakes and handle
covers should be cleaned yearly with a vacuum cleaner. For more thorough cleaning, completely
remove the fans.
Disconnect the AC breaker first. Then, disconnect the DC breaker.
Wait 5 min until the residual voltage has been released, and the fans are no longer turning.
Disassemble the fans (refer to the below figure).
1. Loosen the five screws using a crosshead screwdriver, then remove the fans from the cabinet
about 50mm slowly.
2. Open the lockers of the three fan connectors and remove them from their housings. Remove the
fans.
• Clean the ventilation grid and the fan with a soft brush, a cloth or compressed air.
• Reassemble the fans into the cabinet
• Please use a towel to clean the heat sink once per year.
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