GROWATT TL3-X2 Series Photovoltaic Inverter User Manual

Installation& Operation Manual

Notes on this manual

1.1 Validity
This manual will provide detailed product information and installation instructions for users of model TL3-X2 series photovoltaic inverter of Shenzhen Groat new energy Co., Ltd. (hereinafter referred to as Groat new energy). Please read this manual carefully before using this product. Groat new energy will not inform users of any changes to this manual.
MID 15KTL3-XL2
MID 17KTL3-XL2
MID 20KTL3-XL2
MID 22KTL3-XL2
MID 25KTL3-XL2
MID 30KTL3-X2-1
MID 33KTL3-X2
MID 36KTL3-X2
MID 40KTL3-X2
MID 50KTL3-X2
1.2 Applicable personnel
The inverter must be installed by professional electricians who are certified by relevant departments. By reading this manual in detail, the installer can install the MID TL3X2/TL3-XL2 series inverter correctly and quickly, and can carry out troubleshooting and communication system construction.
If there are any problems during the installation process, the installer can log on to www.growatt.com to leave a message on the website or call our 24-hour service phone: +86 755 2747 1942 .
1.3 Symbols in this document
1.3.1 Symbols in this document
Warnings indicate hazards to equipment or personnel. It draws your attention to a certain procedure or practice. If the procedure or practice is not properly implemented or followed, it may cause damage or destruction of part or all of the Groat device and/or
other equipment connected to the Groat device, or cause personal injury.

DANGER

| DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.

WARNING

| WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION

| CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

NOTICE

| NOTICE is used to address practices not related to personal injury.

Information

| Information that you must read and know to ensure optimal operation of the system.

1.3.2 Markings on this product

| Point of connection for grounding protection

| Direct Current (DC)

| Alternating Current (AC)

| Read the manual
| CE mark.
The inverter complies with the requirements of the applicable CE guidelines.

| The inverter must not be disposed of with the household waste.

1.3.3 Glossary
AC
Abbreviation for “Alternating Current”
DC
Abbreviation for “Direct Current”
Energy
Energy is measured in Why (watt hours), kWh (kilowatt hours) or MWh (megawatt hours).
The energy is the power calculated over time. For example, your inverter operates at a constant power of 4600 W for half an hour and then at a constant power of 2300 W for another half an hour, it has fed 3450Wh of energy into the power distribution grid within that hour.
Power
Power is measured in W (watts), kW (kilowatts) or MW (megawatts). Power is an instantaneous value. It displays the power your inverter is currently feeding into the power distribution grid.
Power rate
Power rate is the radio of current power feeding into the power distribution grid and the maximum power of the inverter that can feed into the power distribution grid.
Power factor
Power factor is the ratio of active power or watts to apparent power or volt amps. They are identical only when current and voltage are in phase then the power factor is 1.0. The power in an ac circuit is very seldom equal to the direct product of the volts and amperes. In order to find the power of a single phase ac circuit the product of volts and amperes must be multiplied by the power factor.
PV
Abbreviation for photovoltaic.
Wireless communication
The external wireless communication technology is a radio technology that allows the inverter and other communication products to communicate with each other. The wireless communication device is not standard. Require to order extra if you need it.

Safety

2.1 Product description and features
2.1.1 Product description
Groat series photovoltaic inverters are used to convert the direct current generated by photovoltaic panels into alternating current, and send it to the grid in a three-phase manner. MID TL3-X2(30-36K) series inverter can be connected to six strings(MID TL3X2(40-50K)/MID TL3-XL2(15-25K)can be connected to eight strings), has 3/4 maximum power tracking point trackers, so suitable for connection 3/4 Set of arrays of different panels.

As shown in Fig 2.1 above, a complete photovoltaic grid-connected system includes photovoltaic modules, photovoltaic inverters, public grids and other components. In the photovoltaic module system, the photovoltaic inverter is a key component.
Note: If the selected photovoltaic module requires positive or negative grounding, please contact Groat for technical support before installation.
2.1.2 Product features
The characteristics of the inverter are as follows:

• 3/4 independent maximum power point tracking
• Built-in DC switch
• Compatible with RS485/Wifi/GPRS/4G communication
• 200V-1000V input voltage range
• The maximum efficiency is as high as 98.8%
• OLED+LED/WIFI+APP display
• Integrated with touch button
• Protection grade IP66
•  The weight is only 38kg
• Simple installation

2.2 Qualification of skilled person
This grid-tied inverter system operates only when properly connected to the AC distribution network. Before connecting the MID TL3-X2/MID TL3-XL2 to the power distribution grid, contact the local power distribution grid company. This connection must be made only by qualified technical personnel to connect, and only after receiving appropriate approvals, as required by the local authority having jurisdiction.
2.3 Safety instructions

1. Please read this manual carefully before installation. If you fail to install according to the instructions in this manual, or ignore the warnings in the manual and the equipment is damaged, our company reserves the right not to guarantee the quality;
2. All operations and wiring should be finished by the professional electrical or mechanical engineers;
3. During installation,  for the wiring terminals, please do not move other parts inside the chassis;
4. All electrical installations must comply with local electrical safety standards;
5. If the machine needs maintenance, please contact the local designated system installation and maintenance personnel;
6. The use of this machine for grid-connected power generation requires permission from the local power supply department;
7. When installing photovoltaic modules during the day, use opaque materials to cover the photovoltaic modules, otherwise the voltage at the module terminals will be high in the sun, which may cause personal danger.

2.3.1 Assembly Warnings

WARNING| ▶Before installation, please check the unit to ensure that there is no transportation or handling damage, which may affect the insulation integrity or safety clearances; otherwise, it may cause safety hazards.
▶ Follow the instructions in this manual to assemble the inverter. Note that select the suitable mounting location and comply with the specified requirements of cooling.
▶ Unauthorized removal of necessary protections, improper use, incorrect installation and operation may lead to serious safety and shock hazards and/or equipment damage.
▶ In order to minimize the possibility of shock hazards due to dangerous voltages, cover the entire solar array with dark colored materials before connecting the array to any equipment.
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CAUTION| ▶ Grounding the PV modules： the MID TL3-X2/MID TL3-XL2 is a transformer less inverter. which means there is no galvanic separation. Do not grounding the DC side of the MID TL3-X2/MID TL3-XL2 inverter. Only grounding the mounting frame of the photovoltaic module. Otherwise there will be an error message “PV ISO Low”.
▶ Comply with the local requirements for grounding the PV modules and the PV generator. GROWATT recommends connecting the generator frame and other electrically conductive surfaces in a manner which ensures continuous conduction with ground in order to have optimal protection of the system and personnel.

2.3.2 Electrical Connection Warnings

DANGER| ▶ The components in the inverter are live. Touching live components can result in serious injury or death.
▶  Do not open the inverter except the wire box by qualified persons.
▶ Electrical installation, repairs and conversions may only be carried out by electrically qualified persons.
▶ Forbid live line work.
▶ Danger to life due to high voltages in the inverter
▶ There is residual voltage in the inverter after the device shutdown. The inverter need to take 20 minutes to discharge for safety.
▶ Persons with limited physical or mental abilities may only work with the Groat inverter following proper instruction and under constant supervision. Must keep the Groat inverter away from children.
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WARNING| ▶ Make all electrical connections (e.g. conductor termination, fuses, PE connection, etc.) in accordance with prevailing regulations. When using the inverter to provide the power, adhere to all prevailing safety regulations to minimize risk of accidents.
▶ Systems with inverters typically require additional control (e.g., switches, disconnects) or protective devices (e.g., fusing circuit breakers) depending upon the prevailing safety rules.

2.3.3 Operation Warnings

WARNING| ▶ Ensure all connectors are sealed and secure during operation.
▶ Although designed to meet all safety requirements, some parts and surfaces of inverter are still hot during operation. To reduce the risk of injury, do not touch the heat sink at the back of the PV- inverter or nearby surfaces while inverter is operating.
▶ Incorrect sizing of the PV panels may result in voltages being present which could destroy the inverter. The inverter display will read the error message “PV Voltage High!”
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CAUTION| ▶ All operations regarding transport, installation and start-up, including maintenance must be operated by qualified, trained personnel and in compliance with all prevailing codes and regulations.
▶ When the inverter is disconnected from the grid, please be careful because some components can retain enough charge to create a shock hazard. In order to minimize the occurrence of this situation, observe all corresponding safety symbols and marks in this manual.
▶ Under special circumstances, the inverter may be subject to electromagnetic interference from surrounding equipment. At this time, the user is obliged to take correct measures to reduce the interference from surrounding equipment to the inverter.
▶ Do not stay close to the inverter less than 20cm at any time.

Product overview

3.1 Appearance overview

The appearance instructions are as follows:

The label description on the inverter:

touching.
| Inverter status identification| Indicate the current running status of the inverter Red: fault Green: normal operation Flashing red light: warning Flashing green: update program

3.2 Dimensions

Size and weight:

3.3 Storage Environment
If you want to store the inverter in a warehouse, you must choose a suitable location for the inverter.

• The equipment must be stored in its original packaging.
• The storage temperature should always be between -25℃ and +60℃, and the storage relative humidity should be less than 90%.
• If you need to store a batch of inverters, the maximum number of layers of the original carton is 3.

Unpacking inspection

Before opening the inverter package, please check whether the outer package is damaged. After unpacking, please check whether the appearance of the inverter is damaged or lack of accessories. If there is damage or missing parts, please contact the
dealer.

Note:
PV+/ PV-terminal and PV+/ PV-metal terminal have 6/6PCS for MID 30-36KTL3-X2; PV+/ PV-terminal and PV+/ PV-metal terminal have 8/8PCS for MID 40-50KTL3-X2/MID 15-25KTL3-XL2.

Installation

5.1 Basic installation requirements

• The wall on which the inverter is mounted must be sturdy and can withstand the weight of the inverter for a long time (refer to the specifications in Chapter 12 for the weight of the inverter);

• The installation location must match the size of the inverter;

• Do not install the inverter on a building constructed of flammable or heat-resistant materials;

• Install the inverter in an eye-view orientation to facilitate inspection of the OLED display and maintenance work;

• The machine’s degree of protection is IP66 and can be installed indoors and outdoors;

• It is not recommended to expose the inverter directly to strong sunlight to prevent overheating and cause power derating;

• The humidity of the installation environment should be between 0 and 90%;

• The ambient temperature around the inverter should be between -25 ° C ~ 60 ° C;

• The inverter can be mounted on a plane that is tilted vertically or backwards. Please refer to the following figure:

• In order to ensure the normal operation of the machine and the convenience of personnel operation, please pay attention to provide sufficient clearance for the inverter. Please refer to the figure below:

• Do not install the inverter on the TV antenna, other antennas or antenna cables;

• Do not install the inverter in the living area;

• Do not install the inverter where children can reach it;

• The inverter should be installed in a sheltered and protected location such as cool, rain-proof;

• Make sure that the inverter is installed in a suitable place and is not allowed to be installed in a closed box;

• In order to reduce the inverter load and extend the life of the inverter due to direct sunlight, we recommend installing a awning. The distance between the awning and the inverter is as follows:

5.2 Install the wall mount
5.2.1 Install the wall mount
Danger
To prevent electric shock or other damage, be sure to check the wall for power or other piping before opening the hole in the wall.
Secure the wall mount as shown, do not let the screws flush with the wall, instead expose 2 to 4 mm.

5.3 Installing the inverter
Note: Before installing the inverter, you must first make sure that the wall mount is firmly fixed to the wall.
steps:

1. Hang the inverter on the wall mount and keep the inverter balanced when hanging.
2. To ensure that the inverter can be securely attached to the wall, secure the side of the inverter with the M5 safety screw on the left.

Inverter wiring

6.1 Security

Danger| There may be a high voltage in the conductive part of the inverter, which may cause electric shock. Therefore, when installing the inverter, make sure that the AC and DC sides of the inverter are powered off.
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WARNING| Static electricity may damage the electronic components of the inverter. Anti-static measures should be taken during the replacement or installation of the inverter.
Note| Moisture and dust penetration can damage the inverter
▶   Make sure that the waterproof cable gland is firmly tightened.
▶  If the cable connector is not installed correctly, the inverter may be damaged due to the penetration of moisture and dust. All warranty claims are void

6.2 AC side wiring

Danger| Before making electrical connections, please make sure that the DC switch of the inverter is in the “OFF” state and disconnect the AC side MCB, otherwise the high voltage of the inverter may cause death.
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Warning| ▶  Each inverter must be installed with an AC circuit breaker independently, and it is forbidden to share multiple inverters.
▶  It is forbidden to use single-core wire at the output terminal of the inverter.
▶    It is forbidden to use aluminum wires as output cables.
▶  Please ensure that the output cable is well connected before turning on the   inverter. Ignoring   the   above   warning may damage the machine or cause other losses. In this case, the company reserves the right not to carry out the warranty and bear any responsibility and related expenses.
Note| Moisture and dust penetration can damage the inverter.
▶  Make sure the cable connector is securely tightened.
▶  If the cable connector is not installed correctly, the inverter may be damaged by moisture and dust. All warranty claims are invalid.

Residual current protection device (RCMU)
Because the inverter itself has a high-precision residual current detection device, it is not recommended to install a leakage protection switch in the system. If for some special reason, it must be installed between the inverter output and the grid. Please install a type B leakage protection switch above 300mA.When multiple leakage protection switches are installed in the system, it is forbidden to share the neutral line, otherwise the leakage protection function may be triggered by mistake and cause the switch to trip.
Preparation before wiring:
Connect the protective ground wire (PE)
Connect the inverter to the grounding bar through the protective earth (PE) to achieve grounding protection.

| ▶ Good grounding is good for resisting surge voltage impact and improving EMI performance. Therefore, you need to ground the wire before connecting the AC,DC, and communication cables.
▶ For a single-machine system, only the PE cable needs to be grounded; For a multi-machine system, the PE cables of all inverters need to be connected to the same grounding copper bar to ensure equipotential connection.
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• Disconnect the inverter DC switch, AC side circuit breaker or switch.
• Measure the voltage and frequency of the public grid (voltage: AC 230V; frequency:50Hz)
• The recommended specifications of the AC output switch are as follows:

AC connection steps(just for Vietnam models):

1. Pass the 5 wires (L1,L2,L3,N and PE wires) through the AC shield, connect them to the power grid, and then crimp the O/U terminal.
2. Lock the AC cable to the corresponding AC terminal.
3. Lock the protective cover on the inverter frame, and finally tighten the protective cover hole.
   Noted: Waterproof must be blocked with fireproof mud to prevent water.

Suggested line length:

Danger| ▶  Sunlight will generate voltage on the battery panel. The high voltage after the series connection may cause life danger. Therefore, before connecting the DC input cable, you need to cover the battery panel with an opaque material before operation, and ensure the reverse The DC switch of the inverter is in the “OFF” state, otherwise the high voltage of the inverter may cause life danger.
▶  To avoid electric shock, do not touch the live parts, and connect the terminals carefully.
▶  Please make sure that the AC switch has been disconnected before wiring.
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Warning| Please ensure that the following conditions are met, otherwise it may cause a fire hazard or damage the inverter. In this case, the company does not carry out quality assurance and assumes any responsibility.
▶  The maximum open circuit voltage of each string of photovoltaic modules shall not exceed 1100Vdc under any conditions.
▶  PV modules connected in series in each PV string are of the same specification type.
▶  The maximum short-circuit current of each PV string must not exceed 26A under any conditions.
▶  The total output power of all PV strings must not exceed the maximum input power of the inverter.
▶  In order to optimize the system configuration, it is recommended to connect the two inputs with the same number of photovoltaic modules.
▶  If the inverter output is directly connected to the grid (that is, the output side is not connected to a low-frequency isolation transformer),please ensure that the PV string is not grounded.
▶  If the inverter is a specific type of thin-film battery module (PV- grounded),please connect the low-frequency isolation transformer to the output terminal before turning it on, otherwise the inverter will be damaged.
Note| ▶  If a stable non- zero DC voltage is measured between the positive pole of the photovoltaic string and the ground, it means that an insulation fault has occurred at a certain position in the photovoltaic string. You need to ensure that the fault is repaired before continuing the wiring.
Moisture and dust penetration can damage the inverter
▶  Make sure that the waterproof cable gland is firmly tightened.
▶  If the cable connector is not installed correctly, the inverter may be damaged due to the penetration of moisture and dust. All warranty claims are void.

The MID series inverter has two independent inputs, as shown in the figure below:

Note: MID 30-36KTL3-X2 (3-channel string); MID 40-50KTL3-X2/MID 15-25KTL3XL2(4-channel string).
The following points should be concerned when choosing photovoltaic modules:

• The photovoltaic modules of each photovoltaic string are of the same specification and model.
• The photovoltaic modules of each photovoltaic string are connected in series with the same number.

Note| Ø Before connecting the battery panel, please make sure that the DC input polarity is correct, that is, the positive pole of the photovoltaic module is connected to the DC input terminal marked “+” of the inverter, and the negative pole is connected to the DC input terminal marked “-“.
Ø  The maximum DC input current and voltage of the inverter shall not exceed the following limits.
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Model| Single maximum input current| Maximum input voltage
MID 30-36KTL3-X2| 32A| 1100V
MID 15-25KTL3-XL2 MID 40-50KTL3-X2| 32A| 1100V

Connect DC terminal

6.4 Connect the signal cable
The MID series inverter has an 16-Pin signal connector except Vietnam models. The client signal line port is as follows:

1. Strip the cable 10mm through the waterproof gland, thread sleeve, and tighten the screws.
2. Push the threaded sleeve into the socket and tighten the waterproof gland.
3. Connect the client to the inverter plug until both are tightly locked on the inverter.

Remove the signal connector

1. Press down the fastener and pull it out of the inverter.
2. Insert the H-shaped tool and pull it out of the socket.

6.5 Grounding the inverter
The inverter must be connected to the AC grounding conductor of the power distribution grid via the ground terminal (PE) .
WARNING
Because of the transformer less design, the DC positive pole and DC negative pole of PV arrays are not permitted to be grounded.
According to the relevant provisions of IEC 61643-32 “Connecting to photovoltaic devices surge protectors – selection and use of guidelines”, whether for household or outdoor photovoltaic power plants, it is necessary to ensure the implementation of lightning protection measures for photovoltaic systems.
WARNING
The lightning protection measures for photovoltaic systems shall be carried out in accordance with the corresponding national standards and IEC standards. Otherwise, photovoltaic devices such as components, inverters and power distribution facilities may be damaged by lightning.
In this case, the company does not carry out warranty and assumes any responsibility.

1. It is generally recommended to install lightning protection devices (such as lightning rods / lightning protection belts and down conductors) to prevent lightning from hitting the PV array.

2. Lightning protection devices and down-conductors and related equipment in photovoltaic systems (including photovoltaic panels, inverters, cables, power distribution equipment) should maintain a safe separation distance S. Suggested value of S: According to the general 5 storey height (about 15m) building roof, S takes 2.5m enough, this distance can be simplified according to the inverse relationship of the floor height.
   A. When the safety distance S is satisfied:
   The position ①③ of the figure should be equipped with a lightning protection module. In general, it is recommended to install Type II in position ① and Type I in position ③.
   B. When the safety and safety distance S is not met:
   In addition to position 3, Type I lightning protection module should be installed in Figure ①②④.

3. The lightning down conductor and the equipment ground wire eventually sink at a total ground point, but the two cannot share the wire. That is, the equipment grounding wire should be pulled separately, and the wire diameter requirement >6mm² when the safety interval distance S is satisfied.

4. About the above lightning protection lightning receptor system related design reference GB/T 21714.3-2015.

6.6 Active power control with smart meter , CT or ripple control signal receiver
Information
The position of export limitation CT or Meter must between the Inverter & Load and gird. This series inverter has integrated export limitation functionality. To use this function, you can connect smart meter or CT. The smart meter model is Easton SDM230-Modbus. The CT Model is TOP 90-S10/SP4(LEM).The primary aperture is 10mm,output cable length is 5m . The arrow on the CT must pointing towards the inverter.

Active power control with a Radio Ripple Control Receiver(RRCR).

6.7 Inverter demand response modes (DRMS)
This series inverter has the function of demand response modes, We use 16-Pin socket as inverter DRMS connection.

Information| DRMS application description
▶   Applicable to AS/NZS4777.2:2015 or Commission Regulation (EU) 2016/631.
▶  DRM0, DRM5, DRM6, DRM7, DRM8 are available.
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CAUTION| Damage to the inverter due to moisture and dust penetration
▶  Make sure the cable gland has been tightened firmly.
▶  If the cable gland are not mounted properly, the inverter can be destroyed due to moisture and dust penetration. All the warranty claim will be invalid.
WARNING| Excessive voltage can damage the inverter! External voltage of DRM PORT don’t over +5V.

6.7.1 16-Pin socket pin assignment

6.7.2 Method of asserting demand response modes

reactive power as far as possible.
DRM 8| 12| 13| Increase power generation (subject to constraints from other active DRMs).

6.7.3 Using the Power Control Interface for EU

6.7.3.1 The following table describes the connector pin assignment and function:

6.8.3.2The inverter is preconfigured to the following RRCR power levels:

DRM Socket Pin 9| DRM Socket Pin 10| DRM Socket Pin 11| DRM Socket Pin 12| Active power| Cos(φ)
---|---|---|---|---|---
Short circuit with Pin 13|  |  |  | 0%| 1
 | Short circuit with Pin 13|  |  | 30%| 1
 |  | Short circuit with Pin 13|  | 60%| 1
 |  |  | Short circuit with Pin 13| 100%| 1

Active power control and reactive power control are enabled separately.
6.8 AFCI(Optional)
6.8.1 Arc-Fault Circuit Interrupter (AFCI)
In accordance with the National Electrical Code R, Article 690.11, the inverter has a system for the recognition of electric arc detection and interruption. An electric arc with a power of 300 W or greater must be interrupted by the AFCI within the time
specified by UL 1699B. A tripped AFCI can only be reset manually. You can deactivate the automatic arc fault detection and interruption (AFCI) via a communication product in “Installer” mode if you do not require the function. The 2011 edition of the National
Electrical Code R, Section 690.11 stipulates that newly installed PV systems attached to a building must be fitted with a means of detecting and disconnecting serial electric arcs (AFCI) on the PV side.
6.8.2 Danger information
 Danger of fire from electric arc
Only test the AFCI for false tripping in the order described below.
Do not deactivate the AFCI permanently.
If an “Error 200” message is displayed, the buzzer alarms, an electric arc occurred in the PV system. The AFCI has tripped and the inverter is in permanent shutdown.
The inverter has large electrical potential differences between its conductors. Arc flashes can occur through air when high-voltage current flows. Do not work on the product during operation.
When the inverter error 200, please follow the steps:
6.8.3 Operation step
6.8.3.1 Turn the DC & AC Switch to position “OFF”.

Wait for the screen be off.
6.8.3.2 Perform troubleshooting on the PV system:
Check the PV strings’ open circuit voltage is normal or not.
6.8.3.3 After the fault is rectified, restart the inverter:
Turn the DC & AC Switch to position “ON”.

Debugging

1. Close the DC switch on the inverter. As long as the input DC voltage is greater than 140V,the inverter display will show the following information: No mains connection error, the inverter LED will turn red.
   If other information is displayed, please refer to Chapter 8.If you encounter any problems during the debugging process and cannot solve it, please contact customer service.

2. Close the circuit breaker or switch between the inverter and the grid, the inverter will start a countdown to the self-check, and after the self-check is normal, it will be connected to the grid.

3. In normal operation, the leaves of the inverter indicator window will turn green.

4. Finish debugging.

Working Mode

8.1 Normal mode
In this mode, the inverter works normally.

• When the DC voltage is greater than 250V, the energy is sufficient, and the grid voltage frequency meets the grid-connected requirements, the inverter will convert the energy of the solar panels into AC power and export to the grid, and the green LED will light up.
• When the DC voltage is lower than 180V, the inverter will automatically disconnect from the grid and exit the normal operation mode. When the input voltage reaches the requirement again and the grid voltage and frequency return to normal, the inverter will automatically connect to the grid.

8.2 Failure mode
The inverter controls the chip monitors and adjusts the state of the system in real time. When the inverter monitors any unexpected conditions, such as system failure and inverter failure, the display will show the fault information. IN the failure mode, the inverter will indicate The leaves of the window will turn red and the inverter output will be disconnected from the grid.
8.3 Shutdown mode
When the sunlight is weak or there is no sunlight, the inverter will automatically stop running. When in shutdown mode, the inverter basically does not consume energy from the grid or solar panels, and at the same time, the inverter’s display screen and LED lights will be turned off.

OLED display and touch button

The OLED display can display the running status of the inverter, as well as various parameters information, and the display interface of the inverter can be switched and the inverter parameters can be set by touching the button.

plus 1
Double touch| Enter the setting state or confirm
Triple touch| Return to the previous display interface
Long press for 5s| The current data returns to the default value

9.1 Boot display
When the inverter is turned on, the OLED display interface is as follows:

9.2 OLED display wake up
After the inverter works normally for 5 minutes, the OLED display will be automatically turned off. At this time, there is no display on the OLED, and the leaf of the indicator window is green. You need to view the display data or make settings to make the OLED display again through touch operation.
9.3 Function setting
** The inverter can support multiple touch modes: single touch, two consecutive touches, three consecutive touches, long press for 5S.
Different types of taps have different functions. Advanced setting password: 111
All setting interfaces are as follows:**

9.3.1 Select the protection voltage level
The factory setting of the inverter is CQC standard regulations. Customers can choose different voltage protection levels according to the actual situation; a single touch switches the voltage level, and two consecutive touches confirm the setting.

Standard

1. Wide voltage level 2
2. Wide voltage level 3

Tips and disclaimers
When the inverter leaves the factory, the grid-connected voltage and frequency are set in accordance with the latest domestic standard;
If the grid voltage is close to or higher than the domestic legal requirements, the inverter cannot be connected to the grid. After obtaining the permission of the local power operator, the user can choose other voltage levels according to the voltage situation of
the grid connection point.
** Excessive grid voltage may affect the normal use and service life of home appliances on the grid-connected side, or cause loss of power generation.
Our company does not accept any responsibility for the related impacts and consequences caused by enabling the automatic control function of output voltage to connect to the grid.
9.3.2 Set language**
The default language is English, touch twice in a row to enter the setting mode, a single touch to switch the language, and touch twice to confirm the setting.

9.3.3 Set COM address
The default COM address is 1.Touch twice in a row to enter the setting mode, single touch, the number +1,touch twice in a row to confirm the setting,long press for 5S number to return to zero.

9.3.4 Set date and time
Touch twice to enter the parameter setting submenu, select the general setting, touch twice to enter the general setting submenu, single touch to switch the display interface, touch twice in the date and time interface to enter the setting state, single touch, number+.

Communication and Monitoring

10.1 RS485
This series of inverters provide two RS485 ports. You can monitor one or more inverters via RS485. The other RS485 port is used to connect a smart meter (stand-alone ant backflow function).

2W
2| COM
3| RS485A1| RS485 communication port
4| RS485B1
5| RS485A2| BAT communication port(reserved)
6| RS485B2
7| RS485A3| Meter communication port
8| RS485B3
9| DRM1/5| Relay contact 1 input
10| DRM2/6| Relay contact 2 input
11| DRM3/7| Relay contact 3 input
12| DRM4/8| Relay contact 4 input
13| REF/GEN| Relay signal reference
14| DRM0/COM| Relay common node

Fig 10.2 just for Vietnam models

10.2 USB-A
USB-A port is mainly used to connect monitoring module or firmware update:
We can connect the external optional monitoring modules, such as Shine WIFI-X, Shine Shine 4G-X, Shine LAN-X, etc. to the USB interface for monitoring.
Steps for installing the monitoring module: Make sure △ is on the front side, then insert the datalogger and tighten the screws.

Maintenance and Cleaning

11.1 Checking Heat Dissipation
If the inverter regularly reduces its output power due to high temperature, please improve the heat dissipation condition. Maybe you need to clean the heat sink.
11.2 Cleaning the Inverter
If the inverter is dirty, turn-off the AC breaker and DC switch ,waiting the inverter shut down ,then clean the enclosure lid, the display, and the LEDs using only a wet cloth. Do not use any cleaning agents (e.g. solvents or abrasives).
11.3 Checking the DC Disconnect
Check for externally visible damage and discoloration of the DC Disconnect and the cables at regular intervals. If there is any visible damage to the DC Disconnect, or visible discoloration or damage to the cables, contact the installer.
Ø Once a year, turn the rotary switch of the DC Disconnect from the On position to the Off position 5 times in succession. This cleans the contacts of the rotary switch and prolongs the electrical endurance of the DC Disconnect.

Start and shut down the inverter

12.1 Start the inverter

1. Close the inverter AC circuit breaker.
2. Close the DC switch, when the input PV voltage is higher than 250Vdc, and the inverter will start automatically.

12.2 Shut down the inverter
Danger
Don’t disconnect the DC connector while the inverter is connected to the grid.
Steps to turn off the inverter:

1. Disconnect the AC circuit breaker to prevent the inverter from starting again;
2. Turn off the DC switch;
3. Check the operating status of the inverter;
4. Wait until the LED and OLED display are off, indicating that the inverter is turned off.

Troubleshooting

13.1 Error message
When a malfunction occurs, an error message will be displayed on the OLED screen.
Faults include system faults and inverter faults.
In some cases, you may be advised to contact Groat, please provide the following information.
Information about the inverter:

• Serial number
• Model
• Error message on OLED
• A short description of the problem
• Grid voltage
• DC input voltage
• Can you reproduce the failure? If so, how?
• Has this problem occurred in the past?
• What were the environmental conditions when the problem occurred?

Information about photovoltaic panels:

• PV panel manufacturer’s name and model
• Panel output power
• Vac of the panel
• Vmp of the panel
• Imp of the group
• The number of panels in each string
• If you need to replace the device, please ship it to the original box.

13.2 System error
Warning Code

shutting down;
2. If the fault message still exists, contact the manufacturer.
Warning 201| String/PID quick connect terminal abnormal| 1. Check the string terminal wiring after shutdown;
2. If the fault message still exists, contact the manufacturer.
Warning 202| DC lightning protection device alarm| 1. Check the DC lightning arrester after shutdown;
2. If the fault message still exists, contact the manufacturer.
Warning 203| Panel short circuit| 1. Check whether the first or second road panel or circuit is short-circuited;

2. If the fault message still exists, contact the manufacturer.

Warning 204| Abnormal function of dry node| 1.Check the dry node wiring after shutdown; 2.If the fault message still exists, contact the manufacturer.
Warning message| Description| Suggest
---|---|---
Warning 205| Boost drive abnormal| 1. Restart the inverter;
2. If the fault message still exists, contact the manufacturer.
Warning 206| AC lightning protection device alarm| 1. Check the DC lightning arrester after shutdown;
2. If the fault message still exists, contact the manufacturer.
Warning 207| USB overcurrent protection| 1. Unplug the U disk;
2. Reconnect the U disk after shutdown; 3.If the fault message still exists, contact the manufacturer.
Warning 208| DC fuse is broken| 1. Check the fuse after shutdown;
2. If the fault message still exists, contact the manufacturer.
Warning 209| Panel voltage is too high| 1. Disconnect the DC switch immediately and confirm the voltage;
2. After the normal voltage is restored, if the fault message still exists, contact the manufacturer.
Warning 210| Panel reverse| 1. Check the panel input;
2. If the fault message still exists, contact the manufacturer.
Warning 300| No mains connection| 1.Please confirm whether the power grid is lost; 2.If the fault message still exists, contact the manufacturer.
Warning 301| Mains voltage is out of range| 1.Check whether the AC voltage is within the specification range of the standard voltage; 2.If the fault message still exists, contact the manufacturer.
Warning 302| Mains frequency is out of range| 1. Check whether the frequency is within the range;
2. If the fault message still exists, contact the manufacturer.
Warning 303| Output overload| 1. Reduce output power;
2. If the fault message still exists, contact the manufacturer.
Warning 304| Open current transformer| 1. Check whether the current transformer is connected well;
2. If the fault message still exists, contact the manufacturer.
Warning 305| Reverse connection of current transformer| 1. Check whether the current transformer is connected reversely;
2. If the fault message still exists, contact the manufacturer.
Warning 306| Communication failure of current transformer| 1. Please check the communication line;
2. If the fault information still exists, contact the manufacturer.
Warning message| Description| Suggest
---|---|---
Warning 307| Wireless CT pairing timeout| 1. Please check the communication line;
2. If the fault information still exists, contact the manufacturer.
Warning 400| Fan function is abnormal| 1.Check the fan wiring after shutdown; 2.Replace the fan;
3.If the fault information still exists,contact the manufacturer.
Warning 401| The meter is abnormal| 1.Check whether the meter is turned on; 2.Check whether the connection between the machine and the meter is normal.
Warning 402| Optimizer and inverter communication abnormal| 1. Check if the optimizer is open;
2. Check whether the connection between the optimizer and the inverter is normal.
Warning 403| String communication abnormal| 1.Check the string board wiring after shutdown; 2.If the fault message still exists,contact the manufacturer.
Warning 404| Memory exception| 1. Restart the inverter;
2. If the fault message still exists, contact the manufacturer.
Warning 405| The firmware version of the control board and the communication board do not match| 1. Check the firmware version;
2. If the fault message still exists, contact the manufacturer.
Warning 406| Boost circuit failure| 1. Restart the inverter;
2. If the fault message still exists, contact the manufacturer.

13.3 System error

2.Restart the inverter;
3.If the fault message still exists, the manufacturer.
Error 201| Leakage current is too high| 1. Restart the machine;
2. If the fault information still exists, contact the manufacturer.
Error 202| Panel voltage is too high| 1. Disconnect the DC switch immediately and confirm the voltage;
2. After the normal voltage is restored, if the fault message still exists, contact the manufacturer.
Error 203| Low panel insulation resistance| 1. After shutting down, check whether the panel shell is reliably grounded;
2. If the fault message still exists, contact the manufacturer.
Error 300| The mains voltage is abnormal| 1. Check the grid voltage;
2. If the grid voltage has recovered to the allowable range and the fault information still exists, contact the manufacturer.
Error 301| AC wiring error| 1. Please check the mains terminal;
2. If the fault message still exists, contact the manufacturer.
Error 302| No mains connection| 1. Check the AC side line connection after shutdown;
2. If the fault message still exists, contact the manufacturer.
Error 303| Zero ground detection anomaly| 1.Check the ground wire after shutting down to ensure that the ground wire is connected reliably; 2.If the fault message still exists, contact the manufacturer.
Error 304| Abnormal mains frequency| 1. Detect grid frequency and restart;
2. If the fault message still exists, contact the manufacturer.
Error 305| Output overload protection| 1. Check output load, reduce load power;
2. If the fault information still exists, contact the manufacturer
Error 306| Reverse connection of current transformer| 1. Check the connection direction of the current transformer after shutdown;
2. If the fault information still exists, contact the manufacturer.
Error 307| Communication failure of current transformer| 1. Please check the communication line;
2. If the fault information still exists, contact the manufacturer.
Error 308| Pairing timeout| 1. The pairing of the machine and the current transformer is overtime, re-pair;
2. If the fault information still exists, contact the manufacturer;
Error code| Description| Suggest
---|---|---
Error 400| Abnormal DC component offset| 1. Restart the machine;
2. If the fault information still exists, contact the manufacturer.
Error 401| The output voltage DC component is too high| 1. Restart the machine;
2. If the fault information still exists, contact the manufacturer.
Error 402| The output current DC component is too high| 1. Restart the machine;
2. If the fault information still exists, contact the manufacturer.
Error 403| Unbalanced output current| 1. Check whether the output current is unbalanced after shutdown;
2. If the fault message still exists, contact the manufacturer.
Error 404| Bus voltage sampling is abnormal| 1 Restart the machine
2: If the fault information still exists, contact the manufacturer
Error 405| Relay abnormal| 1. Restart the machine;
2. If the fault information still exists, contact the manufacturer.
Error 406| Initialization mode exception| 1. Reset mode;
2. If the fault message still exists, contact the manufacturer.
Error 407| Automatic detection failed| 1. Restart the machine;
2. If the fault information still exists, contact the manufacturer.
Error 408| Temperature is too high| 1. Check the temperature after shutdown, restart the inverter after normal;
2. If the fault message still exists, contact the manufacturer.
Error 409| Abnormal bus voltage| 1. Restart the machine;
2. If the fault information still exists, contact the manufacturer.
Error 410| Inconsistent insulation resistance sampling| 1. Restart the machine;
2. If the fault information still exists, contact the manufacturer.
Error 411| Internal communication abnormal| 1. Check the wiring of the communication version after shutdown;
2. If the fault message still exists, contact the manufacturer.
Error 412| Temperature sensor connection abnormal| 1. Check whether the temperature sampling module is properly connected after shutdown;
2. If the fault message still exists, contact the manufacturer.
Error code| Description| Suggest
---|---|---
Error 413| Drive exception| 1. Restart the machine;
2. If the fault information still exists,contact the manufacturer.
Error 414| Memory exception| 1. Restart the machine;
2. If the fault information still exists,contact the manufacturer.
Error 415| Abnormal auxiliary power supply| 1. Restart the machine;
2. If the fault information still exists, contact the manufacturer.
Error 416| Overcurrent  protection| 1. Restart the machine;
2. If the fault information still exists, contact the manufacturer.
Error 417| The grid voltage sampling is inconsistent| 1. Restart the machine;
2. If the fault information still exists, contact the manufacturer.
Error 418| The firmware version of the control board and the communication board do not match| 1. Restart the machine;
2. If the fault information still exists, contact the manufacturer.
Error 419| Inconsistent leakage current sampling| 1. Restart the machine;
2. If the fault information still exists,contact the manufacturer.
Error 420| Leakage current module is abnormal| 1.  Restart the machine;
2. If the fault information still exists, contact the manufacturer.
Error 421| CPLD abnormal| 1. Restart the machine;
2. If the fault information still exists, contact the manufacturer.
Error 422| Redundant sampling is inconsistent| 1. Restart the machine;
2. If the fault information still exists, contact the manufacturer.
Error 423| Abnormal battery reverse connection protection tube| 1. Restart the machine;
2. If the fault information still exists, contact the manufacturer.
Error 424| Battery    voltage sampling is inconsistent| 1. Restart the machine;
2. If the fault information still exists, contact the manufacturer.
Error 425| AFCI self-check error| 1. Restart the machine;
2. If the fault information still exists, contact the manufacturer.

Manufacturer warranty

Please refer to the warranty card.

Decommissioning

15.1 Dismantling the Inverter

1. Disconnect the inverter as described in section8.

2. Remove all connection cables from the inverter.
   CAUTION
   Danger of burn injuries due to hot enclosure parts!
   Wait 20 minutes before disassembling until the housing has cooled down.

3. Screw off all projecting cable glands.

4. Lift the inverter off the bracket and unscrew the bracket screws.

15.2 Packing the Inverter
If possible, always pack the inverter in its original carton and secure it with tension belts.
If it is no longer available, you can also use an equivalent carton. The box must be capable of being closed completely and made to support both the weight and the size of the inverter.
15.3 Storing the Inverter
Store the inverter in a dry place where ambient temperatures are always between -25°C and +60°C.
15.4 Disposing of the Inverter
**** Do not dispose of faulty inverters or accessories together with household waste. Please accordance with the disposal regulations for electronic waste which apply at the installation site at that time. Ensure that the old unit and, where applicable, any accessories are disposed of in a proper manner

EU Declaration of conformity

With the scope of EU directives:

• 2014/35/EU Low Voltage Directive (LVD)
• 2014/30/EU Electromagnetic Compatibility Directive (EMC)
• 2011/65/EU RoHS Directive and its amendment (EU)2015/863

Shenzhen Growatt New Energy Co. Ltd confirms that the Growatt inverters and accessories described in this document are in compliance with the above mentioned EU directives. The entire EU Declaration of Conformity can be found at www.ginverter.com.

Specification

17.1 Parameter

Model Specifications| MID 15KTL3-XL2| MID 17KTL3-XL2| MID 20KTL3-XL2| MID 22KTL3-XL2| MID 25KTL3-XL2
---|---|---|---|---|---
Input data(DC)
Max. recommended PV power(for

module STC)

| 22.5kW| 25.5kW| 30kW| 33kW| 37.5kW
Max. DC voltage| 1100V
Start voltage| 200V
Nominal voltage| 360V
MPP voltage range| 200-850V
No. of MPP trackers| 4
No. of PV strings per MPP trackers| 2/2/2/2
Max. input current per MPP trackers| 32A4
Max. short-circuit current per MPP trackers| 40A4
Backed current to PV array| 0A
Output data(AC)
AC nominal power| 15kW| 17kW| 20kW| 22kW| 25kW
Max. AC apparent| 16.6kVA| 18.8kVA| 22.2kVA| 24.4kVA| 27.7kVA
Nominal AC voltage/range| 127V/220V 133V/230V
AC grid frequency/range| 50/60 Hz 45~55Hz/55-65 Hz
Max. output current| 43.7A| 49.6A| 58.3A| 64.2A| 72.9A
AC inrush current| 60A
Max. output fault current| 148.8A
Max. output overcurrent

Protection

|

148.8A

Power factor(@nominal power)| >0.99
Adjustable power factor| 0.8Leading      0.8Lagging
Theda| <3%
Model Specifications| MID 15KTL3-XL2| MID 17KTL3-XL2| MID 20KTL3-XL2| MID 22KTL3-XL2| MID 25KTL3-XL2
---|---|---|---|---|---
AC grid connection type| 3W+PE /3W+N+PE
Efficiency
Max. efficiency| 98.8%
Euro-eta| 98.5%
Protection devices
DC reverse-polarity protection| YES
DC switch| YES
DC Surge protection| typeII OPT
Insulation resistance monitoring| YES
AC surge protection| typeII OPT
AC short-circuit protection| YES
Grid monitoring| YES
Anti-islanding protection| YES
Residual-current monitoring unit| YES
String Fuse protection| NO
String monitoring| YES
AFCI protection| OPT
General data
Dimensions (W / H / D) in mm| 580435230mm
Weight| 38kg| 38kg| 38kg| 38kg| 38kg
Operating temperature range| -25°C … +60°C (>45°CDerating)
Noise emission (typical)| ≤50dB(A)
Altitude| 4000m
Internal consumption at night| 1W
Topology| Transformer less
Model Specifications| MID 15KTL3-XL2| MID 17KTL3-XL2| MID 20KTL3-XL2| MID 22KTL3-XL2| MID 25KTL3-XL2
---|---|---|---|---|---
Cooling| Smart air cooling
Electronics protection degree| IP66
Relative humidity| 0~100%
DC connection| H4/MC4(OPT)
AC connection| Waterproof PG headnote terminal or quick connect terminal
Interfaces
Display| OLED+LED
USB/RS485| YES
WIFI/GPRS/4G/RF/L AN| OPT
Model Specifications| MID 30KTL3-X2-1| MID 33KTL3-X2| MID 36KTL3-X2| MID 40KTL3-X2| MID 50KTL3-X2
---|---|---|---|---|---
Input data(DC)
Max. recommended PV power(for module STC)| 45kW| 49.5kW| 54kW| 60kW| 75kW
Max. DC voltage| 1100V
Start voltage| 200V
Nominal voltage| 600V
MPP voltage range| 200-1000V
No. of MPP trackers| 3| 4
No. of PV strings per MPP trackers| 2/2/2| 2/2/2/2
Max. input current per MPP trackers| 32A3| 32A4
Max. short-circuit current per MPP

trackers

| 40A3| 40A4
Backed current to PV array| 0A
Output data(AC)
AC nominal power| 30kW| 33kW| 36kW| 40kW| 50kW
Max. AC apparent| 30kVA| 36.6kVA| 40kVA| 44.4kVA| 55.5kVA
Nominal AC voltage/range| 230/400V 340-440V
AC grid frequency/range| 50/60 Hz 45~55Hz/55-65 Hz
Max. output current| 45.5A| 55.5A| 60.6A| 67.3A| 84.1A
AC inrush current| 60A
Max. output fault current| 98.2A| 98.2A| 107.1A| 119A| 148.8A
Max. output overcurrent Protection| 98.2A| 98.2A| 107.1A| 119A| 148.8A
Power factor(@nominal power)| >0.99
Adjustable power factor| 0.8Leading
0.8Lagging
Theda| <3%
AC grid connection type| 3W+N+PE
Model Specifications| MID 30KTL3-X2-1| MID 33KTL3-X2| MID 36KTL3-X2| MID 40KTL3-X2| MID 50KTL3-X2
---|---|---|---|---|---
Efficiency
Max. efficiency| 98.8%
Euro-eta| 98.5%
Protection devices
DC reverse-polarity protection| YES
DC switch| YES
DC Surge protection| typeII OPT
Insulation resistance monitoring| YES
AC surge protection| typeII OPT
AC short-circuit protection| YES
Grid monitoring| YES
Anti-islanding protection| YES
Residual-current monitoring unit| YES
String Fuse protection| NO
String monitoring| YES
AFCI protection| OPT
General data
Dimensions (W / H / D) in mm| 580435230mm
Weight| 34kg| 34kg| 34kg| 38kg| 38kg
Operating temperature range| -25°C … +60°C (>45°CDerating)
Noise emission (typical)| ≤50dB(A)
Altitude| 4000m
Internal consumption at night| 1W
Topology| Transformer less
Cooling| Smart air cooling
Electronics protection degree| IP66
Model Specifications| MID 30KTL3-X2-1| MID 33KTL3-X2| MID 36KTL3-X2| MID 40KTL3-X2| MID 50KTL3-X2
---|---|---|---|---|---
Relative humidity| 0~100%
DC connection| H4/MC4(OPT)
AC connection| Waterproof PG headnote terminal or quick connect terminal
Interfaces
Display| OLED+LED
USB/RS485| YES
WIFI/GPRS/4G/RF/LAN| OPT

17.2 Torque

17.3 Annex
Product attachments can be selected from the table below:

The inverter can be repaired on site or transported to the Groat service center for repair, or it can be replaced with a new one based on the model and service life of the machine.
The warranty does not include the cost of recovery and transportation of faulty equipment. The cost of installation or reinstallation of malfunctioning equipment should also be clearly excluded from other related logistics and processing costs incurred by warranty claims related to various aspects.

Compliance certificates

With the appropriate settings, the unit will comply with the requirements specified in the following standards and directives (dated: Dec./2022):

Contact

If you have technical questions about our products, please contact the Groat New Energy Service Hotline. We need the following information to provide you with the
necessary help:

• Inverter type
• Inverter serial number
•  Inverter error message code
• Inverter OLED display content
• Type and number of PV modules connected to the inverter
•  Inverter communication method

http://oss-cn.growatt.com/common/knowledgeShareH5No?lang=en&type=65
Download Manual Shenzhen Groat New Energy Co., Ltd
4-13/F, Building A, Sino-German(Europe) Industrial Park,
Hunching Ave, Bauman District, Shenzhen, China
T +86 755 2747 1942
E service@ginverter.com
W www.ginverter.com

References

• Growatt | Global Leading Distributed Energy Solution Provider
• 光伏逆变器-工商业储能一体柜-户用储能逆变器_太阳能逆变器厂家【古瑞瓦特逆变器】

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