GOODWE MT G2 Series Grid Tied PV Inverter User Manual

GOODWE MT G2 Series Grid-Tied PV Inverter

Product Information

Specifications

• Manufacturer: GoodWe Technologies Co., Ltd.
• Address: No. 90 Zijin Rd., New District, Suzhou, 215011, China
• Website:www.goodwe.com
• Email:service@goodwe.com
• Phone: 340-00717-01
• Model: MT G2 Series
• Version: V1.1-2023-12-06

Product Usage Instructions

Symbols

• 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
• Don’t touch, a hot surface!
• No more than four (4) identical packages be stacked on each other.
• Special disposal instructions
• Fragile
• Keep Dry
• Refer to operation instructions
• Wait at least 5 min after disconnecting the inverter before touching internal parts (5min)
• CE mark.

Safety Measures & Warning

• Ensure to follow the safety measures and warnings provided in this manual to prevent any potential accidents or injuries.

Product Introduction

• The MT series is a four-MPPT, three-phase transformer-less grid-connected inverter produced by GoodWe Technologies Co., Ltd.
• It acts as a crucial unit between the PV string and the utility grid in the PV power system.
• The inverter is responsible for converting DC power generated by the PV module into AC power that meets the parameters of the local utility grid, feeding it into the utility grid.
• The intended usage of the inverter is illustrated in the diagram below:
• The inverter should not be directly connected to the PV module unless a transformer is used between the inverter and the grid.
• The positive or negative terminal should be grounded.
• The inverter supports different types of utility grids, including TN-S, TN-C, TN-C-S, TT, and IT.
• It is compatible with various types of PV modules such as monocrystalline silicon, polycrystalline silicon, and others.

Item Description

Supported Grid Types:

• MT series GW30KLV-MT
• MT series GW35KLV-MT
• MT series GW50KLV-MT
• MT series GW50KN-MT
• MT series GW50KBF-MT-KR
• MT series GW60KBF-MT-KR
• MT series GW60KN-MT
• MT series GW50KBF-MT
• MT series GW60KBF-MT
• MT series GW75K-MT
• MT series GW80K-MT

Maintenance

Refer to the maintenance section in the user manual for detailed instructions on how to properly maintain and service the inverter.

FAQ

Q: Can the inverter be directly connected to the PV module?

• A: No, the inverter should not be directly connected to the PV module unless a transformer is used between the inverter and the grid.

Q: What types of utility grids are supported by the inverter?

• A: The inverter supports TN-S, TN-C, TN-C-S, TT, and IT types of utility grids.

Symbols

Safety Measures & Warning

• This manual contains important instructions for the MT series of inverter which must be followed during installation and maintenance.
• The MT series includes four MPPTs and a Three-Phase solar inverter without a transformer which consists of GW30KLV-MT / GW35KLV-MT / GW50KLV-MT / GW50KN-MT / GW50KBF-MT / GW50KBF-MT-KR / GW60KBF-MT-KR / GW60KN-MT / GW60KBF-MT /GW75KBF-MT / GW70KHV-MT / GW75K-MT / GW80KHV-MT / GW80K-MT and GW80KBF-MT model types.
• MT Series has been designed and tested strictly according to international safety regulations. Because these are electrical and electronic components, related safety instructions must be complied with during installation, and commissioning.

Improper operation will cause serious harm to:

1. The life and well-being of the operators 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 before any work and at all times.
• All detailed work-related safety warnings and notes will be specified at the critical points in corresponding chapters. All installation and electrical work must be performed only by qualified personnel.

These personnel must meet the standards as stated below:

• Been specially trained and licensed;
• Have thoroughly read and understood all related documents.
• Already familiar with safety requirements of electrical components and systems.
• The inverter must be installed and maintained by professionals in compliance with local electrical standards, regulations, and the requirements of local power authorities or companies.
• Improper handling of the device poses a risk of injury.
• Always follow the instructions contained in the manual when moving or positioning the inverter.
• The weight of the equipment can cause injuries, serious wounds, or bruises if improperly handled.
• Please install equipment where it is out of reach of children.
• Before installing and maintaining the inverter, it is crucial to make certain that the inverter is not electrically connected.
• Before maintaining the inverter, disconnect the connection between the AC grid and the inverter first.
• Then disconnect the connection between the DC input and the inverter, the operator should wait at least 5 min after the disconnection in case of electric shock.
• All cables must be firmly attached, undamaged, properly insulated, and adequately dimensioned.
• The temperature 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 down before touching it.
• Without permission, the opening of the inverter’s front cover is not allowed. Users should not touch/replace any components of the inverter except the DC / AC connectors. The manufacturer assumes no responsibility for any damage to the inverter or person caused by improper operations.
• Static electricity may damage electronic components. Appropriate measures must be adopted to prevent such damage to the inverter. Otherwise, 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 annulled.
• 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 very high voltage, which can cause an electrical shock hazard. Please strictly follow the instructions we have provided.
• PV modules should have an IEC61730 class-A rating.
• Prohibit inserting or pulling the AC or DC terminals when the inverter is working. 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 default photovoltaic module is not grounded.
• If there are more than 3 PV strings on the input side, an additional fuse installation will be required.
• Do not use Y-branch connectors to connect PV strings in parallel to the DC ports of the inverter. Otherwise, it may cause damage to the inverter which will not be covered by GoodWe warranty.
• 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.
• For our inverter product, GOODWE provides a standard manufacturer’s warranty, which comes with the product, and a prepaid warranty extension solution to our customers.
• You can find the details about the terms and solutions from the below link. https://en.goodwe.com/warranty.asp

Product Introduction

Intended Usage

• The MT series is a four-MPPT, three-phase transformer-less grid-connected inverter, which is a crucial unit between the PV string and the utility grid in the PV power system.
• The inverter is dedicated to converting DC generated by the PV module into AC, which conforms to the parameters of the local utility grid, feeding it into the utility grid. The intended usage of the inverter is illustrated in the below figure.
• The reason why the inverter cannot be connected to the PV module is that the positive or negative terminal should be grounded, except when a transformer is used between the inverter and the grid.

different types of utility grid as below)

MT series GW30KLV-MT / GW35KLV-MT / GW50KLV-MT / GW50KN-MT / GW50KBF-MT-KR / GW60KBF-MT-KR / GW60KN-MT / GW50KBF-MT / GW60KBF-MT / GW75K-MT / GW80K-MT support four different types of grid.

Note: For a TT-grid structure, the RMS voltage between the neutral wire and the earth wire must be less than 20V.

GW70KHV-MT / GW80KHV-MT and GW80KBF-MT support the IT grid type. Refer to the below figure ****

Inverter Overview

• MT series inverter illustration.
• Note: The image shown here is for reference only; the actual product you receive may be different.
• The number of strings per MPPT is different. Refer to the Technical Specification to check more details.

GW30KLV-MT/GW35KLV-MT/GW50KLV-MT/GW50KN-MT/GW60KN-MT/GW50KBF-MT/GW70KHV-MT /GW50KBF-MT-KR/GW60KBF-MT-KR

1. PV Input Terminal*
2. RS485 Communication Port
3. AC Output Terminal
4. WiFi Port (Optional)
5. GPRS Port (Optional)
6. Fans
7. DC Switch (Optional)
8. Indicator Light
9. LCD
10. Button
11. Air Outlet
12. External Protection Grounding Terminal

GW60KBF-MT/GW75KBF-MT/GW80KBF-MT/GW80KHV-MT/GW75K-MT/GW80K-MT

1. PV Input Terminal
2. RS485 Communication Port
3. AC Output Terminal
4. WiFi Port (Optional)
5. GPRS Port (Optional)
6. Fans
7. DC Switch (Optional)
8. Indicator Light
9. Air Outlet
10. External Protection Grounding Terminal

Technical Description

Principle Description

• PV string voltage is transmitted to the DC BUS via the BOOST circuit.
• The MT series is equipped with four MPPTs for four DC inputs to ensure that the maximum power is utilized even in different PV installation configurations.
• DC / AC converter circuit converts DC power into AC power, which can be fed into the utility grid. Protective circuits are designed to protect both the inverter’s safety and human safety.
• DC switch is integrated for safe disconnection of DC input. The inverter provides a standard interface RS485 and Wi-Fi (optional) for communication. Inverters also provide a running recode data display and parameter configuration via LCD panel or App.
• Please refer to Chapter 6.2 to check the main block diagram.

Function Description Inverter functions can be grouped as follows:

• Conversion function
• Inverter converts DC power into AC power, which conforms to the grid requirement of its installation country.
• Data storage and display
• Inverter stores the running information and fault records, displaying them on the LCD screen or App.
• Parameter configuration
• Inverter provides various parameter configurations for optional operation.
• Communication interface
• The inverter provides Wi-Fi(optional) and a standard RS485 communications interface.
• Protection functions
• Insulation resistance to ground surveillance
• Input voltage monitor
• Residual current monitoring unit
• Anti-islanding protection
• PV array string fault monitoring
• DC fuse
• DC switch
• DC SPD
• AC SPD
• SPD fault monitoring
• AC over current protection
• Insulation monitoring

Package

The unit is thoroughly tested and strictly inspected before 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 below:
4. Positive & Negative DC plug

  * GW50KBF-MT-KR / GW60KBF-MT-KR / GW50KBF-MT 8 pairs.
  * GW30KLV-MT / GW50KN-MT 10pairs.
  * GW35KLV-MT / GW60KN-MT / GW60KBF-MT / GW70KHV-MT / GW80KBF-MT 12 pairs. GW50KLV-MT / GW75K-MT / GW80KHV-MT / GW80K-MT 16 pairs.

Installation

Mounting Instructions

1. 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 the installation site.
4. Product labels and warning symbols should be placed at a location that is easy to see/read by the users.
5. Ensure to install the inverter at a place where it is protected from direct sunlight, rain, and snow.

Equipment Installation 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 over a long period.
2. Install the unit where it is accessible to service or provide an electrical connection.
3. Do not install the unit on the wall containing or housing flammable materials.
4. Ensure the installation location is well-ventilated.
5. Inverters should not be installed near flammable or explosive items. Any strong electro-mag-netic forces should be kept away from the installation site.
6. Install the unit at eye level for convenient operation and maintenance.
7. Install the unit vertically or tilted backward of no more than 15 °, no lateral tilt is allowed. The wiring area should face downwards. Horizontal installation requires more than 250mm elevation.
8. Install the inverters far away from noise-sensitive areas, such as residential areas, schools, hospitals, etc., to avoid the noises bothering people nearby.

To ensure heat dissipation and convenient disassembly, the minimum clearance around the inverter should not be less than the following values :

Transport And Mounting Procedure

1. Two operators are required when moving the inverter to hold the handle and arm brace respectively.
2. Use the wall-mounted bracket as a template and drill 6 holes on the wall: 13 mm diameter and 65 mm deep.
3. Fix the wall-mounted bracket on the wall with six expansion bolts from the accessory bag.
4. Carry the inverter with the handles on both sides of the inverter.
5. Place the inverter on the wall-mounted bracket as illustrated.

Schematic of Cover Dismantling and Installation Steps

1. Dismantle the downside cover.
   • (Tool: external hexagonal screwdriver)
2. Electrical installation.
3. Assemble the bottom-side cover.
   • (Tool: hex button.
   • Twisting Force: 2 N.m)
4. Assemble the downside cover.
   • (Material: M5 inner-hexagon screws.
   • Tool: hex button)

Electrical Connection

Connection to Grid (AC Side Connection)

1. Measure the voltage and frequency of the grid-connected access point, and ensure it is under the grid-connected 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 the rating of the AC output current.
3. The PE line of the inverter should be connected to the earth, ensuring that the impedance between the neutral wire and earth wire is less than 10 Ω.
4. Disconnect the breaker or fuse between the inverter and the utility.
5. Connect the inverter to the grid. The wiring installation method on the AC output side is shown below：
6. Fix (Torque : 6-8 N.m) the connector of the AC cable to the corresponding terminals.
7. The neutral conductor shall be blue; the line conductor shall be black or brown (preferred); the protective earth bonding line shall be yellow-green.
8. The AC line construction shall be such that if the cord should slip from its anchorage, placing a strain on conductors, the protective earthing conductor will be the last to take the strain.
   • Ensure the PE line is longer than L and N.

Note: It is not necessary to connect Neutral wire to the inverter of GW30KLV-MT / GW35KLV-MT / GW50KN-MT / GW60KN-MT / GW75K-MT / GW80K-MT products.
Please select Delta grid on the panel or SolarGo App, otherwise connect the neutral wire to them. Do not connect the neutral wire to the inverter of GW70KHV-MT, GW80KHV-MT, and GW80KBF-MT products.

AC cable illustration

AC Circuit Breaker and Residual Current Protection 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 safely disconnected from the grid.
• The output current of GW30KLV-MT / GW50KN-MT is 80A. Thus we recommend that the nominal current of the AC breaker be 100 A.
• The output current of GW35KLV-MT / GW50KBF-MT / GW50KBF-MT-KR / GW60KN-MT / GW60KBF-MT / GW60KBF-MT-KR / GW70KHV-MT / GW80KHV-MT and GW80KBF-MT is 90A.
• Thus, we recommend that the nominal current of the AC breaker be 120A.
• The output current of GW50KLV-MT / GW50KLV-MT / GW80K-MT is 133A. Thus, we recommend that the nominal current of the AC breaker should be more than 160A.
• Note: It is not allowed for several inverters to use the same circuit breaker. Connecting loads between the inverter and circuit breaker is also not allowed Select and Install RCD depending on local laws and regulations.
• Type A RCDs (Residual Current Monitoring Devices) can be connected to the outside of the inverter for protection when the DC component of the leakage current exceeds the limit value.

The following RCDs are for reference:

GW30KLV-MT, GW35KLV-MT, GW50KLV-MT, GW50KN-MT, GW60KN-MT, GW50KBF-MT, GW60KBF- MT, GW75KBF-MT, GW80KBF-MT, GW70KHV-MT, GW80KHV-MT, GW75K-MT, GW80K-MT, GW50KBF-MT-KR, GW60KBF-MT-KR| 500mA

Earth Terminal Connection

• The inverter is equipped with an earth terminal, per the requirement of EN 50178.
• All non-current carrying exposed metal parts of the equipment and other enclosures of the PV power system must be grounded.
• Please connect the ‘PE’ cable to the ground.

1. Strip the wire insulation sheet to a suitable length using a wire stripper, illustrated below.

Section area of AC cable (S)| Section area of PE cable| Note
---|---|---
S > 16mm2| 16mm²| Only applicable when the material of PE wire and L wire is the same.
If the material is different, please select according to the equivalent resistance of the PE wire.
S ≤ 35mm2| 16mm²
S > 35mm2| S/2

1. Insert the stripped wire into the terminal and compress it tightly by crimping pliers.
2. Fix the earth wire on the machine.

1. To improve the corrosion resistance of the terminal, we recommended applying silica gel to the earth terminal for corrosion resistance after the grounding cable assembly is completed.

Connecting Inverter to PV Panel Caution

1. Ensure the DC switch is turned off before connecting the PV string to the inverter.
2. Ensure PV string polarity confirms with the DC connector. Otherwise, it will cause damage to the inverter.
3. Ensure the maximum open circuit voltage (Voc) of each PV string does not exceed the maximum input voltage of the inverter under any circumstances (1100V).
4. Ensure that the maximum short circuit current of each DC input is less than the inverter’s allowable limit.
5. Do not connect the positive or negative poles of the PV string to the earth (PE terminal). Otherwise, it will destroy the inverter.
6. Positive cable should be red; negative cable should be black.
7. The minimum insulation resistance to the ground of the PV panels must exceed 33.3kΩ (R = 1000/30 mA), there is a risk of shock hazard if the requirement of minimum resistance is not met.
8. The MT series has four PV input areas: PV1 input, PV2 input, PV3 input, PV4 input. Each has an MPP tracker. The four PV inputs work independently. Therefore, the four PV inputs can differ, including different module types, numbers of connecting PV strings, and orientation angels of the PV module.

There are four types of DC connectors: VACONN, MC4, AMPHENDL H4, and QC4.10 series.

Note: The actual DC connector used is as shown in the accessory box.

DC cable specification:

The installation method for DC connector

• To better dustproof and waterproof the internal inverter, all DC connectors provided in the accessory bag should be connected to the inverter.
• If only some of the DC connectors are used, the DC connectors without connection should be blocked with a non-conductive insulator.

DC Switch

• The DC switch is designed to be safely disconnected from the DC input if required.
• The inverter works automatically when the input and output meet the requirements.
• Rotating the DC switch to the ‘OFF’ position will immediately cut off the flow of DC.
• Rotate the DC switch to the ‘ON’ position before starting the inverter.

Communication Connection

• Inverter operation data can be transferred by USB, RS485, or WI-FI Module to a PC with monitoring software or to a data logger device (e.g. Ezlogger Pro).
• USB is only used for service debugging; The RS485 is the standard communication choice for the inverter, and the WI-FI module can be used optionally for communication.

USB Connection

• The USB cable must be connected according to the following steps, shown below:
• This function is only for local firmware upgrades and parameter calibrations.

RS485 Communication

• This function only applies to the inverter with RS485 ports.
• The RS485 port of the inverter is used to connect the EzLogger Pro, and the total length of the connecting cable should not exceed 1000m.
• Communication lines must be separated from other power lines to prevent interference with the communication. RS485 connections are shown below.

The connection steps of RS485 communication of the MT series are as follows:

• Step 1: Find the RS485 terminal and screw out the screw cap.

Step 2:

• Put the cable through the plate, and connect the RS485 cable to the 6-pin terminal.
• Advise to use cable 16AWG-26AWG.

No.

1

2

| Function

RS485+

RS485-

---|---
3| Reserved
4| Reserved
5| RS485+
6| RS485-

Step 3:
Connect the terminal to the right position onto the inverter.
Note: The terminal of different inverter models may be located in a different place.

Caution

• Cable requirements of RS485 communication: Shielded twisted-pair cable or shielded twisted-pair Ethernet cable 120 Ω termination resistor is controlled by a dip switch. ‘ON’ means connected, and ‘OFF’ means disconnected.
• The terminal resistance dial switch is selected to 120 Ω.
• When A single inverter is in communication, rotate the terminal resistance dial switch to the ON state (The default state is ‘OFF’) which is next to the RS485 communication port of the inverter, so that the RS485 terminal is 120Ω.
• Then, ensure the shielding layer of the communication line issingle-point grounded.
• If multiple inverters are in communication, connect all of them in a daisy chain through the RS485 communication cable.
• For the device at the end of the daisy chain, rotate the terminal resistance dial switch to the ‘ON’ state (The default state is ‘OFF’).
• Then, ensure the shielding layer of the communication line is single-point grounded.

Wi-Fi Communication

• This function is only applicable to the Wi-Fi model inverter. Please refer to ‘Wi-Fi Configuration
• Instruction’ to complete WiFi configuration.
• After the configurations are completed, please register on the website: www.goodwe.com.
• Please refer to the Wi-Fi app for specific configuration.
• The Wi-Fi module installation of the MT series is shown below.

DRED ( Demand response enabling device)

• DRED function is achieved using the Ezlogger Pro. Please connect the Ezlogger Pro through the RS485 port. Please refer to the Ezlogger Pro manual for detailed DRED connections.
• You can refer to EzLogger Pro SERIES USER MANUAL. Visit https://en.goodwe.com/Public/Uploads/sersups/GW_EzLogger%20Pro_User%20Manual-EN.pdf to get the user manual.

Remote Shutdown

Step 1:

• Unscrew this plate from the inverter.

(Optional) Step 2: Ony for Germany.

1. Plug out the 4-pin terminal and dismantle the resistor on it.
2. Plug the wire out; leave the 4-pin terminal for the next step.

Step3:

• Insert the gateway cable through the components as follows: screw cap, one-hole sealing ring, insulation body, and sheet-metal parts.
• For regions except for Germany, the 4-Pin Terminal is in the scope of delivery.

No.

1

2

| Function

24V

Shutoff _1

---|---
3| 24V
4| Shutoff _2

Step4:

1. Connect the terminal to the right position of the inverter.
2. Fasten the waterproof plate to the inverter.

Precaution For Initial Startup

1. Make sure the AC circuit is connected and the AC breaker is turned off.
2. Make sure the DC cable between the inverter and the PV string is connected, and the PV voltage is normal.
3. (Optional) Turn on the DC switch, and set safety according to the local regulations.
4. Turn on the AC breaker. Check the inverter works normally.

System Operation

LCD Panel and LED

• As a human-computer interaction interface, the LCD panel comprises LED indicators, buttons, and a display on the front panel of the inverter.
• The LED interface provides the working status of the inverter.
• Buttons and LCDs are used for configuration and viewing parameters.
• LCD panel is included in GW30KLV-MT / GW35KLV-MT / GW50KN-MT / GW60KN-MT / GW50KBF-MT / GW70KHV-MT model type.
• LED only panel is included in: GW50KN-MT / GW50KLV-MT / GW50KBF-MT / GW50KBF-MT-KR / GW60KBF-MT-KR / GW60KN-MT / GW60KBF-MT / GW70KHV-MT / GW75K-MT / GW80KHV-MT / GW80K-MT and GW80KBF-MT.

User Interface Introduction

1. Safety code: The number represents the safety serial number
2. Fan icon: The fan icon indicates that the fan is on
3. Power Derating: The output power of the inverter is derating
4.  Alarm icon: The alarm icon indicates that the system LVRT function is on
5. LVRT icon: The LVRT icon indicates that the system LVRT function is on
6. Shadow scan: The Shadow icon indicates that the Shadow scan function is on
7. PID icon: The PID icon indicates the existence of the PID module
8. Communication icon: Method of communication: GPRS, Wi-Fi or RS485
9. Communication information icon: GPRS and Wi-Fi show signal strength; RS485 shows the communication address.
10. E-Day icon: Daily generation
11. E-Total: Total generation
12. Time and date
13. Real-time power icon
14. Real-time power
15. System status information

Overview of Menu Architecture

• The display menu has a total of three levels. Use the ‘Up’ ‘Down’ ‘Enter’ ‘ESC’ buttons to operate the menu. The enter button has two operating methods: long-press (greater than 3s) and short-press. In summary, there are 5 buttons total to operate the menu.
• Press the ‘Enter’ / ‘ESC’ to enter / exit each level menu, use the ‘Up’ / ‘Down’ to select the item and change the parameters, and long press the ‘Enter’ (greater than 3s) to set the parameters.

First-level Menu

• Press ‘up’ / ‘down’ to select the interface of the first level: History, Configuration, Adv.Settings etc.
• Pressing the Enter button will enter the corresponding Second-level menu. Select the item through the ‘up’ / ‘down’ in the Second-level menu. Press the Enter button to enter the project setup menu in the Third-level menu, change the setting contents by pressing the ‘up’ / ‘down’, and press the ‘Enter’ to set the contents. If the country’s safety setting is not selected (shows ‘Configure Safety’ on display on the home page), press any button to enter the country’s safety setting page

System Configuration

Basic Settings

• Basic settings are mainly used to set the commonly used parameters, including language settings, time settings, communication settings, and safety settings.

Advanced Settings

• Advanced settings are mainly used to set the function parameters of the equipment to running modes.
• To prevent the device from running abnormally because of improper operation, all advanced-settings items require a password.
• Therefore, enter a password so that you can set all the settings in the ‘advanced settings’ menu. In case the customer forgets the password, all devices have a unique super password and SN binding.
• Advanced settings items include LVRT settings, Shadow settings, PF value settings, Active power settings, Reactive power settings, and password modification settings.

History Information

• The history information mainly includes information about the generating capacity of the equipment, the fault record, and the power generation information.
• The power generation information mainly includes in the amount of electricity generation, daily power generation, monthly power generation, and annual power generation information.

Operation of Display When Started Up

• When the input voltage reaches the inverter’s turn-on voltage, the LCD will indicate.
• WAITING’. If the grid is accessible, ‘Checking xxx Sec’ (The time is decided by the grid connection standards from a different country) will appear after 5 s. As it is counting, the inverter is self-checking.
• When it shows ’00Sec’, you will hear the voice from the motion of the relay. The LCD will display ‘Normal’ afterward. The instant power output will be shown on the left of the LCD.

Menu Introduction

• When the PV panel is feeding power to the inverter, the screen shows the first interface of the first-level menu. The interface displays the current state of the system.
• It shows ‘Waiting’ when in the initial state; it shows ‘Normal’ when in the power generation mode. If there is something wrong with the system, an error message will be shown. Please refer to ‘5.6 Error Message’.
• In the first-level menu, the displayed information can be switched via the ‘Up’ and ‘Down’ buttons operation. There are 6 interfaces in total, which are circulatory. The second-level menu can only be selected using the ‘Enter’ button from the seventh interface.
• In the ‘History-Info’ menu, press ‘Enter’ and ‘Down’ to select ‘Error Log’, and press ‘Enter’ to enter the historical error message interface. Press ‘Up’ and ‘Down’ to switch the display page and inquire about the historical error message.
• Press ‘ESC’ to return to the upper menu.
• In the ‘Configuration’ menu, select ‘Date & Time’ to enter the setting interface, Press ‘Up’ and Down’ to change the data, short-press ‘Enter’ to move the cursor, and long-press ‘Enter’ to save the settings.
• You must type in the password before entering the Advantage Setting. The inverter’s default password is 1111. You can set the parameters and modify the password after this password verification is passed.
• If you forget your password, please contact after-sales for help.
• In the ‘Configuration’ menu, select ‘Language’ and press ‘Enter’ to enter the language setting interface, press ‘Up’ or ‘Down’ to change language, long-press ‘Enter’ to save the settings, and press ‘ESC’ to return.
• In the ‘History-Info’ menu, short-press ‘Enter’ to enter the second-level and third-level menus.
• In the third-level menu, press ‘up’ or ‘down’ to inquire about the historical power generation data in Year Mode, Month Mode, Day Mode, and Hour Mode. Press ‘ESC’ to return to the upper menu.
• In the ‘Configuration’ menu, choose ‘Comm’ and press ‘Enter’ to enter the Modbus address interface. Press ‘Up’ or ‘Down’ to set the address, and long press ‘Enter’ to save the address.

This function is used for special requirements, please don’t set it arbitrarily

• In the second-level menu, select ‘LVRT'(if LVRT mode has not been turned on), it will show ‘[OFF]’ on the right-hand side of the LCD. Then press ‘Up’ or ‘Down’ to change the state to ‘[ON]’. Long press ‘Enter’ to save the setting.
• Then the screen will soon display ‘[ON]’ after a while. This means that LVRT mode has been successfully turned on.

This function is used for special requirements, please do not set it arbitrarily

• In the second-level menu, select ‘Shadow'(if shadow mode has not been turned on). It will show ‘[OFF]’ on the right-hand side of the LCD. Then press ‘Up’ or ‘Down’ to change the state to ‘[ON]’. Long press ‘Enter’ to save the setting and the screen will display ‘[ON]’ after a while so that the Shadow mode has been successfully turned on.

This function is used for special requirements, please do not set it arbitrarily

• Select ‘Safety’ in the ‘Configuration’ menu, then press ‘Enter’, so that the set safety interface will be shown. Press ‘Down’ or ‘Up’ to choose the safety you need and then long press ‘Enter’.
• The chosen safety option will be set. If there is no exact proper country code, please choose ’50Hz Grid Default’ or ’60Hz Grid Default’ accordingly.

Wi-Fi Reset & Wi-Fi Reload

These functions are only available for Wi-Fi model inverters.

1. In the ‘Configuration’ menu, select ‘Wi-Fi Reset’ and press ‘Enter’ for 3 seconds to reset the inverter Wi-Fi module. Wait for a while.
   • The operation result will be shown on the display.
   • The function can be applied when the inverter is unable to connect to the router or monitor server.
2. In the ‘Configuration’ menu, select ‘Wi-Fi Reload’ at lever 3. Press ‘Enter’ for 3 seconds. The initial settings of the Wi-Fi module will be reloaded. Wait for a while. the operation result will be shown on the display.
   • The function can be applied when the inverter is unable to connect to the Wi-Fi model. After the Wi-Fi modular is restored to its initial settings, the Wi-Fi module needs to be reset again.

Setting Inverter Parameters via App

SolarGo is an application used to communicate with the inverter via Bluetooth module, WiFi module, or GPRS module. Commonly used functions:

1. Check the operating data, software version, alarms of the inverter, etc.
2. Set grid parameters and communication parameters of the inverter.
3. Maintain the equipment.

For more details, refer to the SolarGo APP User Manual. Scan the QR code or visit https://en.goodwe.com/Ftp/EN/Downloads/User%20Manual/GW_SolarGo_User %20Manual-EN.pdf to get the user manual.

Monitoring via the SEMS Portal

• SEMS Portal is a monitoring platform used to manage organizations/users, add plants, and monitor plant status.
• For more details, refer to the SEMS Portal User Manual. Scan the QR code or visit https://en.goodwe.com/Ftp/EN/Downloads/User%20Manual/GW_SEMS%20Portal-User%20Manual-EN.pdf to get the user manual.

Special Adjustable Setpoints

• NOTE: For the Australian market, to comply with AS/NZS 4777.2:2020, please select from Australia Region A/B/C, please contact your local electricity grid operator on which Region to select.
• After the safety area setting is completed, some parameters in the inverter system will take effect according to the corresponding safety regulations, such as the PU curve, QU curve, trip protection, etc.
• If you need to change the configuration parameters, please refer to the SolarGo APP user manual.

Power Limit Setting

Power limit networking scenario (single inverter)

Power limit networking scenario (multi inverter)

Set related parameters via the SolarGo app to enable export power limit control or output power limit control.

Error Message

The error message in the below diagram will be displayed on the LCD if faults occur.

the Master DSP
13| DC Injection High| The DC component of AC exceeds the inverter’s limit
14| Isolation Failure| Insulation Resistance between the ground and the panel is too low
15| Vac Failure| Grid voltage exceeds the inverter limit
16| External Fan Failure| External Failure
17| PV Over Voltage| PV Array voltage exceeds the inverter limit
19| Over Temperature| Over temperature on the case
20| IFAN Fault| Internal FAN Fault
21| DC BUS HIGH| BUS voltage is too high
22| Ground I Failure| Residual current protection
23| Utility Loss| Grid disconnection/fault
30| REF 1.5V Failure| 1.5V reference voltage exceeds the limit
31, 24| AC HCT Failure| AC sensor failure
32, 26| GFCI Failure| Leakage current detection circuit Failure
Others| Device Failure| Internal Device Failure

Troubleshooting

• If the Inverter is unable to work properly, please refer to the following instructions before contacting your local service center.
• 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.

PV (+) & PV (-). The impedance

2. The value must be greater than 100 kΩ. Ensure the inverter is earthed. Contact the local service office for help if the problem persists.

Ground I Failure| 1. The ground current is too high.

2. Unplug the inputs from the PV generator and check the peripheral AC

3. system.  problem is cleared, reconnect the PV panel and check the Inverter When the Contact status. local service office for help if the problem persists.

Vac Failure| 1. The PV Inverter will automatically restart within 5 minutes if the grid returns

2. to normal. voltage conforms with the specification.

3. Ensure grid       (N) wire and PE wire are connected well.

4. Ensure neutral office for help if the problem persists.

Contact local service

Fac Failure| 1. The grid is not connected.

2. Check grid connection cables.

3. Check the availability of the grid.

Utility Loss| 1. Not connect to the grid.

2. Check if the power grid is connected to the cable.

3. Check the availability of the power grid.

PV Over Voltage| 1. Check if the PV open circuit voltage is higher or too close to the maximum

2. input voltage or not.  when the PV voltage is less than the maximum input If the problem persists voltage, contact the local service office for help.

Over Temperature| 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 still exists, contact the local service office for help.

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 the local service office for help.

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| 1. Turn off the DC switch, take off the DC connector, and measure the voltage of the PV array. connector, and turn on the DC switch.

3. Plug in the DC is lower than 250V, please check the configuration of the PV array voltage If the voltage is higher

4. inverter module. than 250V, please contact the local office.

Others| The Wi-Fi module fails to connect to a network| 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 in the hotspot’s password that are not supported by the module. Please modify the password to comprise only Arabic numerals or If the problem persists, contact
2. uppercase/lowercase letters.  the local service office for help.

Note:

• When sunlight is insufficient, the PV Inverter may continuously start up and shut down automatically because of insufficient power generation by the PV panel.

Earth Fault Alarm

• The inverter complies with IEC62109-2 13.9. When an earth fault occurs, a buzzer in the EzLogger Pro will ring for 1 minute, and an LED will be lit for 1 minute. The alarm will ring again every half hour unless the fault is resolved.
• You can refer to EzLogger Pro SERIES USER MANUAL. Visit https://en.goodwe.com/Public/Uploads/sersups/GW_EzLogger%20Pro_User%20Manual-EN.pdf to get the user manual.

Technical Parameters & Block Diagram

Technical Parameters

Technical Data| GW30KLV- MT| GW35KLV- MT| GW50KLV- MT
---|---|---|---
DC Input Data

Max. PV Power (W)

| 54000| 63000| 65000
Max. DC Input Voltage (V)| 800| 800| 800
MPPT Range (V)| 200~650| 200~650| 200~650
Starting Voltage (V)| 200| 200| 200
Min. Feed-in Voltage(V)| 210| 210| 210
Nominal DC Input Voltage (V)| 370| 370| 370
Max. Input Current (A)| 33/33/22/22| 33/33/33/33| 44/44/44/44
Max. Short Current (A)| 41.5/41.5/27.5/27.5| 41.5/41.5/41.5/41.5| 55/55/55/55
No. of MPP Trackers| 4| 4| 4
No. of Input Strings per Tracker| 3/3/2/2| 3/3/3/3| 4/4/4/4
AC Output Data|  |  |
Nominal Output Power (W)| 30000| 36000| 50000
208VAC| 28800| 34500| 47300
Max. Output Power (W) Max. Output Apparent Power| 220VAC| 30000| 36000| 50000
240VAC| 33000| 39900| 55000
(VA)| 33000| 39900| 55000
Nominal Output Voltage (V)| 220, 3L/N/PE or 3L/PE| 220, 3L/N/PE or 3L/PE| 220, 3L/N/PE or 3L/PE
Nominal Output Frequency (Hz)| 50/60| 50/60| 50/60
Max. Output Current (A)| 80| 96| 133
Output Power Factor| ~1 (Adjust| able from 0.8 leading to 0.8| lagging)
Output THDi (@Nominal Output)| <3%
Efficiency|
Max. Efficiency| 98.7%                                        98.8% 98.7%
European Efficiency| 98.3%| 98.5%| 98.3%
Protection|  |  |
PV String Current Monitoring| Integrated
Anti-islanding Protection| Integrated
Input Reverse Polarity Protection| Integrated
Insulation monitoring| Integrated
DC fuse| Integrated
Anti-PID Function for Module| Optional
DC SPD Protection| Integrated（Type II）
AC SPD Protection| Integrated（Type II）
Residual Current Monitoring Unit| Integrated
AC Over Current Protection| Integrated
AC Short Protection| Integrated
AC Over Voltage Protection| Integrated
General Data|
Ambient Temperature Range (℃)| -30~60(60 °C for outdoor unconditioned with solar effects.)
Relative Humidity| 0~100%
Operating Altitude (m）| ≤4000
Cooling| Fan Cooling
Display| LCD or WiFi+APP                     LCD or WiFi+APP LED, WiFi+APP
Communication| RS485, WiFi(Optional)| RS485, WiFi(Optional)| RS485, WiFi, PLC(Optional)
Weight (kg)| 59| 64| 70
Dimension (Width Height Depth mm）| 586788264| 586788264| 586788267
Protection Degree|  | IP65|
Night Self Consumption (W)| <1
Topology| Transformerless（Non-isolated）
Certifications & Standards|
Grid Regulation|
Safety Regulation| Visit the homepage to get information.
EMC Regulation

Input

Max. PV Power (W)

| 65000| 80000| 104000
Max. DC Input Voltage (V)| 1100| 1100| 1100
MPPT Range (V)| 200~1000| 200~1000| 200~1000
Starting Voltage (V)| 200| 200| 200
Min. Feed-in Voltage (V)| 210| 210| 210
Nominal DC Input Voltage (V)| 620| 620| 800
Max. Input Curren per MPPT(A)| 33/33/22/22| 33/33/33/33| 39/39/39/39
Max. Short Current per MPPT (A)| 41.5/41.5/27.5/27.5| 41.5/41.5/41.5/41.5| 54.8/54.8/54.8/54.8
No. of MPP Trackers| 4| 4| 4
No. of Input Strings per Tracke| 3/3/2/2| 3/3/3/3| 3/3/3/3
 |  |  |
Output|  |  |
Nominal Output Power (W) Max. Output Power (W)| 50000

55000；57500@415ac

| 66000; 60000

69000@415ac

| 80000

88000

Max. Output Apparent Power (VA)| 55000； 57500@415ac| 66000; 69000@415ac| 88000
Nominal Output Voltage (V)| 400, default 3L+N+PE, 3L+| PE optional in settings| 540,3L/PE
Nominal Output Frequency (Hz)| 50/60|  | 50/60| 50/60
Max. Output Current (A)| 80| 96| 94.1
Output Power Factor| ~1 (adjust| table from 0.8 lagging to 0.8| leading)
Output THDi (@Nominal Output)| <3%
Efficiency|
Max. Efficiency| 98.7%| 98.8%| 99.0%
European Efficiency| 98.3%| 98.5%| 98.4%
Protection|  |  |
PV String Current Monitoring| Integrated
DC fuse| Integrated
Insulation monitoring| Integrated
Residual Current Monitoring| Integrated
Anti-islanding Protection| Integrated
Input Reverse Polarity Protection| Integrated
DC Surge Arrester| Type II
AC Surge Arrester| Type II
AC Over Current Protection| Integrated
AC Short Circuit Protection| Integrated
AC Over Voltage Protection| Integrated
Anti-PID Function for Module| Optional
General Data|
Ambient Temperature Range (℃）| -30~60(60 °C for outdoor unconditioned with solar effects.)
Relative Humidity| 0~100%
Operating Altitude| ≤4000（m）
Cooling| Fan Cooling
Display|  | LCD or APP+Wifi|  | LED, APP +WiFi
Communication| RS485, WiFi, or PLC (Optional| l)
Weight (kg)| 59|  | 64| 65
Dimension W×H×D (mm)| 5867| 88264| 586788267
Protection Degree| IP65|
Night Self Consumption| <1
Topology| Transformerless（Non-isolated）
General Data|
Grid Regulation|
Safety Regulation| Visit the homepage to get information.
EMC

Technical Data| GW60KBF- MT| GW75KBF- MT| GW50KBF- MT
---|---|---|---
DC Input Data

Max. PV Power (W)

| 80000| 97500| 65000
Max. DC Input Voltage (V)| 1100| 1100| 1100
MPPT Range (V)| 200~1000| 200~1000| 200~1000
Starting Voltage (V)| 200| 200| 200
Min. Feed-in Voltage(V)| 210| 210| 210
Nominal DC Input Voltage (V)| 620| 750| 620
Max. Input Current (A)| 44/44/44/44| 44/44/44/44| 30/30/30/30
Max. Short Current (A)| 55/55/55/55| 55/55/55/55| 37.5/37.5/37.5/37.5
No. of MPP Trackers| 4| 4| 4
No. of Input Strings per Tracker| 3/3/3/3| 3/3/3/3| 2/2/2/2
AC Output Data|  |  |
Nominal Output Power (W)| 60000| 75000| 50000
Max. Output Power (W) [1]| 66000;69000@415Vac| 82500| 55000;57500@415Vac
Max. Output Apparent Power (VA) [2]| 66000;69000@415Vac| 82500| 55000;57500@415Vac
 | 400, 3L+N+PE|  | 400, 3L+N+PE
Nominal Output Voltage (V) Nominal Output Frequency (Hz)| or 3L+PE 50/60| 500, 3L/PE

50/60

| or 3L+PE 50/60
Max. Output Current (A)| 96| 95.3| 80
Output Power Factor| ~1 (Adjust| able from 0.8 leading to 0.8| lagging)
Output THDi (@Nominal Output)| <3%
Efficiency|
Max. Efficiency| 98.8%| 99.0%| 98.8%
European Efficiency| 98.3%| 98.4%| 98.3%
Protection|  |  |
PV String Current Monitoring| Integrated
Anti-islanding Protection| Integrated
Input Reverse Polarity Protection| Integrated
Insulation monitoring| Integrated
DC fuse| Integrated
DC SPD Protection| Type II
AC SPD Protection| Type II
Residual Current Monitoring Unit| Integrated
AC Over Current Protection| Integrated
AC Short Protection| Integrated
AC Over Voltage Protection| Integrated
General Data|
Ambient Temperature Range (℃)| -30~60(60 °C for outdoor unconditioned with solar effects.)
Relative Humidity| 0~100%
Operating Altitude (m）| ≤4000
Cooling| Fan Cooling
Display|  | LED or WiFi+APP|
Communication| RS485, WiFi or PLC(Optional)|
Weight (kg)| 65| 65| 60
Dimension (Width Height Depth mm）| 586788267| 586788267| 586788264
Protection Degree|  | IP65|
Night Self Consumption (W)| <1
Topology| Transformerless（Non-isolated）
Certifications & Standards|
Grid Regulation|
Safety Regulation| Visit the homepage to get information.
EMC Regulation

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. For example, 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).For example, 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℃. The relative humidity range is 4-100%, applied to PD3.
• Indoor unconditioned: the ambient air temperature is -20-50℃. The relative humidity range is 5- 95%, applied to PD3.
• Indoor conditioned: the ambient air temperature is 0-40℃. The relative humidity range is 5- 85%, applied to PD2.

Pollution Degree Definition

• Pollution degree 1: No pollution or only dry, non-conductive pollution occurs. 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. This includes the pollution caused by conductive dust, rain, and snow.

Block Diagram

GW30KLV-MT / GW50KN-MT main circuit

GW70KHV-MT / GW80KBF-MT main circuit

When GW50KN-MT is without a DC switch, the circuit diagram is as follows.

For Australia and New Zealand

When GW80K-MT is equipped with 3 MPPTs but without a DC switch, the circuit diagram is as follows.

For Australia and New Zealand

Maintenance

• Regular maintenance ensures a long operating life and optimal efficiency of the entire PV plant.
• Caution: Before maintenance, please first disconnect the AC breaker. Then disconnect the DC breaker. Wait 5 min until the residual voltage has been released.

Clearing The FAN

The MT series inverter is equipped with three fans on its left side. The fan intakes and handle covers should be cleaned yearly using a vacuum cleaner. For more thorough cleaning, completely remove the fans.

1. Disconnect the AC breaker first. Then, disconnect the DC breaker.
2. Wait 5 min until the residual voltage has been released, and the fans are no longer running.
3. Disassemble the fans (Refer to the below figure).
   • Loosen the five screws using a crosshead screwdriver. Then, slowly remove the fans out of the cabinet about 50mm.
   • Open the lockers of the three fan connectors and remove them from the housing. Then uninstall the fans.
4. Clean the ventilation grid and the fans with a soft brush, or compressed air.
5. Reinstall the fans into the cabinet.

(Optional) Checking the DC switch

• DC switch does not require any maintenance
• Although not mandatory, maintenance below is still recommended:
• Check the DC switch regularly.
• Activate the DC switch 10 times in a row once per year.
• Operating the switch will clean the switch and will extend its life.

Turn On / Off the Inverter Boot order:

1. Turn on the breaker on the AC side.
2. (Optional) Turn on the DC switch.
3. Turn on the breaker on the DC side.

Note: If there is no switch, only perform steps 1 and 3 (please skip step 2).

Shutdown order:

1. Turn off the breaker on the AC side.
2. (Optional) Turn off the DC switch.
3. Turn off the breaker on the DC side.

Note: If there is no switch, only perform steps 1 and 3 (please skip step 2).

Checking the Electrical Connection

1. Check if the AC or DC wire is loose.
2. Check to ensure the earth wire is reliably grounded.
3. Check if the waterproof covers of the RS485 and USB port are fastened.

Note: The maintenance cycle is once every half year.

Fuse Replacement

If the inverter fuses are broken, replace them quickly.

The steps are as follows:

1. Disconnect the circuit breaker on the AC side.
2. Rotate the DC switch to the ‘OFF’ position.
3. Disconnect the front-end circuit breaker of the PV input terminal or pull out the PV input terminal.
4. Wait at least 10 min.
5. Open the junction box’s cover on the bottom of the inverter.
6. Confirm that the fuses are broken.
7. Remove the broken fuses vertically as shown in the right figure. Do not remove fuses by prying or via similiar methods.
8. Install the same model fuses from the same company to the corresponding fuse holders.
9. Install the junction box cover on the inverter.

• GoodWe Technologies Co., Ltd.
• No. 90 Zijin Rd., New District, Suzhou, 215011, China
• www.goodwe.com
• service@goodwe.com

Documents / Resources

| GOODWE MT G2 Series Grid Tied PV Inverter [pdf] User Manual
MT G2 Series Grid Tied PV Inverter, MT G2 Series, Grid Tied PV Inverter, Tied PV Inverter, PV Inverter, Inverter
---|---

References

• GoodWe Warranty

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