Growatt 10000UE User manual

Growatt 10000UE
Growatt 12000UE
Growatt 18000UE
Growatt 20000UE
Installation
&
Operation Manual
GROWATT NEW ENERGY CO., LTD
No.12 Building, Xicheng Industrial
Zone, Bao’an District, Shenzhen, P. R.China
+ 86 755 2747 1900
+ 86 755 2749 1460
[e-mail]
www.ginverter.com
T
F
E
W

Introduction
1.1 Validity
1.2 Target Group
1.3 Product Overview
Unpacking
2.1 Unpacking and Inspection
Mounting
3.1 Selecting Mounting Location
3.2 Dimensions and Required Clearances
3.3 Mounting the Bracket
3.4 Mounting Inverter
Electrical connections
4.1 Wiring AC Output
4.2 Wiring DC Input
Directory
1
2
3
4
2.2 Information of Label
1.4 Safety
Commissioning
5
Operation Modes
6
6.1Normal Mode
6.3Shutdown Mode
6.2Fault Mode

Growatt UE series inverters are grid-tied inverters which convert DC current
generated by PV modules into AC current and feed it into the public grid in three-
phase. Growatt UE series inverters are multi-string inverters with multi-MPP trackers,
which mean they are able to connect to different PV module arrays.
Introduction 1
1.1 Validity
1.2 Target Group
1.3 Product Overview
This installation guide contains installation, commissioning, communication, trouble
shooting. information of Growatt UE series inverters:
Growatt 10000UE
Growatt 12000UE
 Growatt 18000UE
 Growatt 20000UE
This manual is for qualified persons such as PV system installers or electricians.
Scope of the factory
warranty
LCD display
7.1 General LCD display
7.2 Operate by knock
7.3 Data checking and parameters
setting
8.1 ShineNet monitoring software
8.2 Bluetooth Module (opt)
8.3 ShineLogger
COMMUNICATIONS
9.1 General question
9.2 Error Messages displayed on LCD
TROUBLE SHOOTING
SPECIFICATIONS
Growatt Factory
warranty
Warranty conditions
7
8
9
10
11
12
13
With this installation guide, users are able to install and operate the inverters
easily.This manual does not cover any details concerning equipment connected to
the Growatt UE.Store this manual where accessible at all times.
Notes
responsibilities to inform the users.
: For possible changes in this manual, Growatt New Energy Co., Ltd accepts no
7.4 Inverter faulty messages
8.4 Shine GPRS collector

As drawings shown above, a complete Grid-tied PV system consists of PV modules,
PV inverters, public grid and other components. Moreover, PV inverters always act as
key components.
When design a PV system contains Growatt UE series inverters or any other Growatt
inverters, the system designing software ShineDesign (download from site:
www.ginverter.com) will provide adequate supports.
Inverters Overview:
Grid-tied PV system Overview:
Notes
capacity relative to ground of the modules is large, please contact Growatt New
Energy for technical support before installation.
: If PV modules of the PV system require POSITIVE or NEGATIVE GROUND, or the
1.4 Safety
VDE0126-1-1
 AS4777
 Dk5940
Growatt UE is designed to use worldwide, hence the inverters meet different safety
standards of variety countries and regions：
DANGER!
Danger to life due to high voltages in the inverter!
All work on the inverter may be carried out by qualified personnel only.
The appliance is not to be used by children or persons with reduced physical, sensory
or mental capabilities, or lack of experience and knowledge, unless they have been
given supervision or instruction.
Children should be supervised to ensure that they do not play with the appliance.
CAUTION!
Danger of burn injuries due to hot enclosure parts!
During operation, the upper lid of the enclosure and the enclosure body may become
hot.
Only touch the lower enclosure lid during operation.
CAUTION!
Possible damage to health as a result of the effects of radiation!
Do not stay closer than 20 cm to the inverter for any length of time.
Grounding the PV generator
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 and ground
these in order to have optimal protection of the system and personnel.
CAUTION!
Possible damage the PV modules as a result of Identification
of String Failure!
The GROWATT UE Inverter is equipped with a system which recognizes total failure of
individual strings or part-strings.
Input A
Input B
DC Breaker
DC Breaker
AC Breaker
GROWATT UE Inverter
Energy meter Public grid

Unpacking 2
2.1 Unpacking and Inspection
Notes
box gently and avoid dispose the packing box.
: Though the packaging box of Growatt UE is durable, please treat the packing
Before opening the packing box of Growatt UE, please note that whether there are
any visible external damages.
Once open the packing box, please check the delivery for completeness and for any
visible external damages of the inverter. If there are anything damaged or missing,
please contact your dealer. Complete delivery should contain as follows:
A
BC
D
E
F
Item
A
B
C
D
E
F
__
Number
1
1
6/8
6/8
6/8
6/8
1
Description
Growatt UE inverter
Mounting frame
Expansion bolt
Screw washer
Spring washer
Nut
User manual (not shown in the picture)
G
H
2
1
Handle
AC connector
Hint: Number of C/D/E/F is 6 for Growatt 10000/12000UE, and 8 for Growatt 18000/20000UE.
2.2 Information of Label
The label contains information as below:
The inverter type/model (Model Name);
The certificates and approvals (Certificate
Number and Logos at the bottom of the
label);
Specifications of the inverter (From UDCmax
to Operation Ambient Temperature.
3 Mounting
3.1 Selecting Mounting Location
This is guidance for installer to choose a suitable installation location, to avoid
potential damages to device and operators.
E
A
B
C
The wall selected to install the inverter must be strong and firm
enough to support and bear the weight of the inverter for a long
period time. (Refer to Chapter 10 Specifications)
The location selected must be suitable for inverters’ dimension.
(Refer to 3.2 Dimensions and Required Clearances)
Do not install the inverter on structures constructed of flammable
or thermolabile materials.
Never install the inverter in environment of little or no air flow, nor
dust environment. That may derate the efficiency of the cooling fan
of the inverter; hence derate the efficiency of PV inverter.The
cooling fans and air grills should be cleaned every half or a year.
The Ingress Protection rate is IP65 which means the inverter can be
installed outdoors and indoors.
D
GH

F
G
H
I
J
Do not expose the inverter to direct sunlight, in order to avoid the
power and efficiency derating caused by excessive heating.
The humidity of the installation location should be 0~95%
without condensation.
The ambient temperature of the inverter should be -25℃~+60℃.
The installation location must be freely and safely to get at all
times.
Vertically installation and make sure the connection of inverter
must be downwards. Never install horizontal and avoids forward
and sideways tilt.(Refer to drawings below)
K
L
M
Notice the minimum clearances of the inverter. (Refer to 3.2
Dimensions and Required Clearances).
Do not install the inverter near television antenna or any other
antennas and antenna cables.
Do not install the inverter in living area, the noise caused by the
machine may affect on daily life.
For security reasons, DON’T install the inverter in place where the
children can reach.
N
3.2 Dimensions and Required Clearances
Dimensions and weight :
Types Height(H) Width(W) Weight/kg
10000UE
12000UE
18000UE
20000UE
740
740
740
740
440
440
520
520
41
41
60
60
Depth(D)
However, additional clearances are needed to guarantee running and operation of
the inverters. Especially when several inverters are installed together, the clearances
between the inverters and objects are necessary.
3.3 Mounting the Bracket
To mount the inverter on the wall, we should mount the bracket to the wall firmly
first of all.
235
235
235
235

Overview of the Bracket:
Hint: Data units in mm
Steps:
Drill holes for screws while use the mounting frame as template.6 holes for
Growatt 10000/12000UE and 8 for Growatt 18000/20000UE.
Fix the mounting frame on the wall as the figures shown below, combine as
the screws as the Items overview picture shows (items C, D, E, F).
Notes
mounting frame is really firmly mounted on the wall after carefully checking.
: Never mount the inverter on the bracket unless you are sure that the
3.4 Mounting Inverter
After the bracket is firmly mounted on the wall, then mount the inverter on the bracket.
Hang the inverter on the bracket through the match hooks on bracket and the
back of the inverter.
4Electrical connections 
4.1 Wiring AC Output
Measure the public grid voltage and frequency (Voltage: 400Vac;
Frequency: 50Hz/60Hz; in 3-Phase);
Open the breaker or fuse between the PV inverter and utility;
Screw torsional force is 8 kg/cm;
Rise up the Growatt UE a little higher than the bracket. Considered the weight of
Growatt UE, you need handles (items G shown in chapter 2.1) to hang on the
inverter. During the process please maintain the balance of the Growatt UE.

Specification of AC breaker: Growatt 10000UE/ 12000UE: 32A/400V
Growatt 18000UE/ 20000UE: 63A/400V
*
*

Connect cables to relative bolts shown in figure above , specifications of cables
must meet the requirements shown in the table above;
Cable requirements:
Model _(mm) Area(mm²) AWG no.
10000UE
12000UE
18000UE
20000UE
_2.05
_2.05
_2.59
_2.59
3.332
3.332
5.260
5.260
12
12
10
10
The interface of the connector:
Assemble the connector as figures shown below;
1
23
N
E
12
Notes
AC output, please make sure that the AC breaker has been turned off (open).
: The connector must be screwed firmly. Before you operating and wiring the
4.2 Wiring DC Input
The open circuit voltage of each string should never exceed 1000Vac, while the
length must be less than 30m;
The diagram drawing of DC side is shown as below, notice that the connectors
are in paired (male and female connectors). The connectors for PV arrays and
inverters are MC (multi-connector) connectors;
Connect the positive and negative terminals from the PV panels to positive and
negative terminals on the PV inverter. The maximum string currents are varying
from different inverter types
34
5
Notes
package.
: Detailed information of the connector refer to the manual of the connector in

Type Max. current
10000UE
12000UE
18000UE
20000UE
15Adc
17Adc
23Adc
25Adc
Cable requirements:
Model _(mm) Area(mm²) AWG no.
10000UE
12000UE
18000UE
20000UE
_2.05
_2.05
_2.05
_2.05
3.332
3.332
3.332
3.332
12
12
12
12
Notes:
Current.
Under any conditions the total circuit current should never exceed the Max.
Notes:
treat the terminals carefully.
To reduce the risk of electric shock, avoid touching the live components and
Commissioning 5
A
B
C
If the inverter is connected with PV panel arrays and the input voltage is
higher than 300Vac, while the AC grid is not connected yet, LCD will
display messages in order as below:
Company info  Basic info  State info 
The LCD will repeat clue to No AC connection at State info and the LED
turns red.
In State info, operate by knocks will change the LCD display:
State info  (knock) Input info  (knock) Output info  (knock) E_day
power curve
Turn on the AC breaker or close the fuse between inverter and grid, the
system will operate normally.
Under normal operating conditions, the LCD displays ‘Power: xx.xx Kw’ at
State info, this is the power fed into grid. The LED turns green.
Finish commissioning.
D
6Operation Modes 
6.1 Normal Mode
In this mode, the inverter works normally and LED turns green.
Whenever the DC voltage is lower than 300Vac, the inverter will work in waiting
state and attempt to connect the grid. In waiting state the inverter consumes
just enough power generated by the PV panel to monitor the internal system
status;
Whenever the DC voltage is higher than 350Vac, inverter converts power to grid
as generated by the PV panels;

Notes:
sufficient.
The inverter starts up automatically when DC power from the PV panel is
6.2 Fault Mode
The internal intelligent controller can continuously monitor and adjust the system
status. If inverter finds any unexpected conditions such as system fault and inverter
fault, the fault information will be displayed on the LCD. In fault mode the LED turns
red.
Notes:
LCD. Detailed fault information refers to Chapter 9.2 ERROR messages displayed on
6.3 Shutdown Mode
Inverters automatically stop running during periods of little or no sunlight. In
shutdown mode the inverters take no power from the grid and panel, and the LCD
and LED turns off.
Notes:
Mode. If the PV string DC voltage is too low, the inverter will also turn to Shutdown
LCD display7
In the lower right corner of inverter there is the LCD display. We can check inverter
running status, historical generation data, etc, on the LCD screen. Items displayed
can be changed by knock, you can also set some parameters by knock.
7.1 General LCD display
7.1.1 Power on display
When inverter is powered on, LCD background light will light automatically. Growatt
Logo will appear immediately. The background light will last for 2 seconds. See
Fig7.1 for reference.
Fig7.1:Power on Growatt Logo
After displaying Growatt Logo for 2 seconds, LCD screen will switch to the second
interface, display the figure of inverter, company name, inverter’s power rating, etc.
The second interface will last for 3 seconds. See Fig7.2 for reference.
Fig 7.2:The second power on interface
After 3 seconds, it will switch to the third interface. See Fig7.3 for reference.
Fig7.3:The third power on interface
Here are explanation of items on Fig7.3:
No. : serial number of this inverter.
Model:model name of this inverter.
Main Ver: firmware version of control board
Comm Ver: firmware version of communication board .
After displaying information of the third interface for 3 seconds, the background
light will turn off.

LCD Display Overview

7.1.2 LCD Display when background light off
After the power on information is displayed automatically and the background light
turns off, the LCD display will switch to the following Interface 1. There are 4
interfaces, which can be displayed in turn by single knock.
Interface 1: Running status. See Fig 7.4 as reference. The first line displays inverter’s
status description, for example, in faulty state it will display ERROR and followed
with faulty codes, which is convenient to compare with error code list in manual. The
second line displays inverter’s states name; and the third line displays energy
generated today, and the forth line displays the total energy generated since
installation.
Fig7.4:Interface 1: Running status
Interface 2: Input information. See Fig7.5 for reference.
This interface displays parameters of PV input, including input voltage, current, and
power of each MPP tracker.
V-pv: input voltage of MPPT1 and MPPT2
I-pv: input current of MPPT1 and MPPT2
W-pv: input power of MPPT1 and MPPT2
Fig7.5:Interface 2: Input information
Interface 3: Output information. See Fig7.6 for reference.
This interface displays output information of inverter, including output voltage of
each phase, output current of each phase, and output power of each phase.
Fig7.6:Interface 3: Output information
V: output voltage of each phase
I: output current of each phase
P: output power of each phase
Interface 4: 24 hour’ generation curve. See Fig7.7 for reference.
This interface shows the generated power of every hour this day.
Fig7.7:Interface 4: 24 hour’s generation curve
Max: maximum power of today
Power curve: today’s power curve
7.1.3 Connecting messages
When inverter started to connect to grid, the following message will appear on LCD
screen. See Fig7.8 for reference.

Fig7.8 Connect to gird interface
7.2 Operate by knock
7.2.1 Knock type and definition
The inverter can support three kinds of knock: single knock, double knock and thrice
knock. Each kind of knock has different function. Refer to specified definition in
Table 7.1.
Table 7.1 Knock definition list
KeyEsc
Knock type
Single knock
Double knock
Thrice knock
Definition
KeyDown
KeyEnter
7.2.2 Light background light and single knock to check running
information
Before light the background light, the three types of knock functions the same,
which is just lighting the background.: just light the background . Note that the
background lighting will automatically turn off if there is no knock detected in 10
seconds.
During cloudy days or in the area of low light, it’s inconvenient for users to check
inverter running information such as status, input data, output data, energy
generated. In this case user can light the background and check those data by single
knock, a single knock will switch LCD screen to a following interface. The interface
display on LCD screen will circle as follows: Fir7.4 -> Fig7.5 -> Fig 7.6 -> Fig7.7 ->
Fig7.8, and then again Fig7.4.
7.3 Data checking and parameters setting
7.3.1 First level menu
It is a little bit different to enter the first level menu, note that using thrice knock to
enter first level menu instead of double knock. Fig 7.9 is interface of first level menu.
Fig 7.9 First level menu
In this interface, a single knock will switch the index to next item, a double knock will
enter the corresponding second level menu.
7.3.2 Second level menu
In first level menu, double knock will lead to next level menu.
The followings are second level menu interfaces for each first level menu items,
shown in Fig 7.10
In second level menu, a single knock will switch the index to next item, a double
knock will enter the corresponding third level menu. And a thrice knock will back to
first level menu.

Double knock
Single knock
Fig 7.10 Second level menu for each first level menu items
7.3.3 Third level menu and explanations
7.3.3.1 Working information
The followings are third level menu interfaces for each second level menu items of
working information, shown in Fig 7.11
Fig 7.11 Third level menu interface of working information
Explanations of each items in third level menu interface of working information:
State information:
Table 7.2 Working information sub-items explanation
State
Input
State: Normal
Power: xxx.xx
E_day
E_all
Power: xxx.xx
V-pv xxx/xxx
I-pv xx.x/xx.x
W-pv xxx/xxx
Inverter running status
AC gross output power
Energy produced today
Energy produced since installation
Gross input power from PV panel
PV input voltage for each MPP tracker
PV input current for each MPP tracker
PV input power for each MPP tracker
Second level menu Third level items Item explanation
Double knock
Single knock
Single knock
Single knock
Double knock
Double knock
Double knock
Double knock

Second level menu
Output
Power line
Third level items
Power: xx.xx
V: xxx.xxx.xxx
I: xx.x/xx.x/xx.x
P: xxx/xxx/xxx
Power: xx.x
Max: xx.x
Power curve
Item explanation
AC output gross power
AC output voltage for each phase
AC output current for each phase
AC output power for each phase
AC output current power
AC output maximum power
AC output power curve
7.3.3.2 Historical information
The followings are third level menu interfaces for each second level menu items of
historical information, shown in Fig 7.12
Double knock
Double knock
Double knock
Double knock
Double knock
Fig 7.12 Third level menu interface of historical information
Explanation of each items in third level menu interface of working information:
State information:
Table 7.3 Historical information sub-items explanation
Second level menu
Error Record
E in 7Days
E in This Year
Third level items
Error1: xxx
Error2: xxx
Error3: xxx
Error4: xxx
7 Days
Month
Item explanation
Display 4 latest error record.
Title indicate this is latest 7 days
running data
Title indicate this is every month’s
running data in this year
Title indicate this is latest 10 years
running data
E in Each Year Year
Format is Month:Date, xxxx.x is
energy generated in that day.
MM:DD: xxxx.x
Kwh
MM: xxxx.x Kwh xxxx.x is energy generated in
that month.
xxxx.x is energy generated in the
corresponding year.
20XX: xxxx.x Kwh
7.3.3.3 Property information
The followings are second level menu interfaces of property, shown in Fig 7.13
Double knock
Single knock
Fig 7.13 Property information

Explanation of each items in third level menu interface of working information:
State information:
Table 7.4 Property information
First level menu
Property
Second level items
No.:xxxxxxxxxx
Model:PxUxMxSx
Main Ver:D.0.1
Comm Ver:C.0.1
2011-01-01
07:00:00
Item explanation
Serial number of this inverter
Odel name of this inverter
Date time
System time
7.3.4 Parameters set and auto test
The followings are setting information in second level menu and its sub-
menus,shown in Fig 7.14
Fig 7.14 setting second level menu and its sub-menus
7.3.4.1 Set inverter’s COM address
When communicating with monitoring software or device, the software or device
may regard inverter’s COM address as communication address (Also may use
inverter’s serial number as communication address).The COM address could be
assigned random or fixed. The second level menu “Set COM address” of setting is to
set inverter’s COM address.
Set random COM address :
Setting->Set COM addr->Set Auto, then LCD screen will display “Set OK, Mode:
Auto, COM addr: xxx”, see Fig 7.14 for reference.
Set fixed COM address:
Setting->Set COM addr->Set Manual, then single knock to change value of fixed
address, double knock will save changes, and LCD screen will display “Set Addr OK!
Current Addr XXX”, see Fig 7.14 for reference.
7.3.4.2 Set language
To change inverter’s displaying language, please select Setting->Set language, then
LCD screen will display current language type, single knock to change current
language, double knock will save changes and displays “Set Language OK! Current
Language English” see Fig 7.14 for reference.
Please note in order to prevent misoperation, system language won’t be change in
second level menu “Set language”, but it will be only if user saves save the choice by
double knock and LCD displays “Set OK!”
The inverter provides five languages: Italian, English, German, Spanish, and French.
The number on Set language interface is sequence number of these five languages,
the sequence number and its corresponding language are shown in Table 7.5
Table7.5 sequence number of languages
Language Sequence Number
Italian
English
German
Spanish
French
0
1
2
3
4

7.3.4.3 Set inverter time
Inverter provides a system clock; user must set the system time after installation, as
the historical statistic data for a period were based on the clock. User can set the
following time parameters: year, month, day, hour, minute.
Set year: Setting->Set time->Set year->Year up or Year down->knock to change year.
Thrice knock to exit and save changes.
Set month: Setting->Set time->Set month->Month up or Month down->knock to
change month. Thrice knock to exit and save changes.
Set date: Setting->Set time->Set date->Date up or Date down->knock to change
date. Thrice knock to exit and save changes.
Set hour: Setting->Set time->Set hour->Hour up or Hour down->knock to change
Hour. Thrice knock to exit and save changes.
Set minute: Setting->Set time->Set minute->minute up or minute down->knock to
change minute. Thrice knock to exit and save changes.
7.3.4.4 Auto test function
Auto test function is to check the inverter's protection when grid is abnormal,
including over voltage, under voltage, over frequency, and under frequency.
To run auto test function please select Setting->Auto test, then double knock to start
auto test function. It’s required to connect inverter to computer and run a test
software in computer.
Auto test procedure
7.4 Inverter faulty messages
When system fault or inverter error occurs, inverter will display faulty message or
error code on LCD screen.
7.4.1 System fault
System fault is related to the solar system, it may be caused by PV panels wiring, AC
wiring, or AC grid faults.
The followings are all system faulty messages displayed on inverter:
123
456
7
89
10 11 12
13

System fault message may
display on LCD Explanation and suggestion
Auto Test Failed
No AC Connection
PV Isolation Low
Residual I High
Output High DCI
PV Voltage High
AC V Outrange
AC F Outrange
Auto test didn’t pass
No utility, no grid connected
Insulation problem.
GFCI current high
Output current DC offset too high
PV panel voltage too high
Grid voltage out of range
Grid frequency out of range
7.4.2 Error message
Inverter errors are problems come from interior inverter.
DISPLAY OPERATION
Error: 100
Error: 101
Error: 103
Error: 104
Fan fault
Communication fault
EEPROM fault
Model Fault
Error: 109 Input Current Out of range
Error: 110
Output Current Out of range
Error: 117 Relay Fault
Error: 119
Error: 120
Error: 122
GFCI Fault
UHCT Fault
Bus voltage out of range
Communication 8
8.1ShineNet monitoring software
ShineNet is PC software designed to collect data from Growatt Inverters with strong
analytical function. It has multi-communication channels and completed data
analysis function. Users are able to monitor the status of Growatt inverters in real-
time, browse and analysis the history data that has been recorded.
Notes:
information about setting and functions refer to the ShineNET Manual.
Users are able to monitor the inverter after the setting of software. Detailed
8.2 Bluetooth Module (opt)
Bluetooth module is an external device that can be plugged into inverter via RS232
port. Bluetooth RS232 Configuration is a parameter setting software of Bluetooth
module to set configuration such as device name, flow control method, encryption
password (pair code), etc.
Pic:
Notes:
parameters:
Before delivery, the Bluetooth module is set to the default configuration
Baud rate 9600 bps Parity bit None
Data bit
Flow control
Bind address
8
None
None
Stop bit
Master/Slave devices
Pair code
1
Slave device
1234
Hint: Pair code is encryption password.

8.3 ShineLogger
ShineLogger is an inverter monitoring product of Growatt New Energy Co., Ltd. It
can collect and analyze running data of inverter via Bluetooth connection, and
display monitoring data on LCD screen; user can also browse data on computer as
well. ShineLogger can monitor up to 4 inverters simultaneity.
ShineLogger has standard data communication interface, including RS232/RS485
serial port, USB port, and Bluetooth, it will be compatible with you existing systems
smoothly.
Pic:
Notes: Indoor installation. Detailed information refers to ShineLogger Manual.
8.4 Shine GPRS collector
PV power station remote data acquisition unit (GPRS data collector) collects inverter
operation data, including PV input voltage, PV input current, AC output voltage, AC
output current, frequency, output power, etc. via RS-485/RS232 connection and send
the above data to website via GPRS, so that users can check power station’s real time
status by login to website www.growatt.net, also can browse historical data in the
past.
Pic:
Notes:
signal is stability. Indoor installation only. Detailed information refers to Shine GPRS
collector manual.
To assure the regular running of collector, user should make sure the GSM
9Trouble shooting
Our quality control program assures that every inverter is manufactured to accurate
specifications and is thoroughly tested before leaving our factory. If you have
difficulty in the operation of your inverter, please read through the following
information to correct the problem.
9.1 General question
For General question, please visit www.ginverter.com, and find the Q&A column.
Customers DON’T need to set the configuration again. Detailed information of
configuration and operation refer to Bluetooth module Introduction.
This device is optional.

9.2 Error Messages displayed on LCD
An error message will be displayed on the LCD screen when a fault occurs. The faults
consist of system fault and inverter fault.
You may be advised to contact Growatt in some situation, please provide the
following information.
Information concerning the inverter:
• Serial number
• Model number
• Error message on LCD
• Short description of the problem
• Grid voltage
• DC input voltage
• Can you reproduce the failure? If yes, how?
• Has this problem occurred in the past?
• What was the ambient condition when the problem occurred?
Information concerning the PV panels:
• Manufacturer name and model number of the PV panel
• Output power of the panel
• Voc of the panel
• Vmp of the panel
• Imp of the panel
• Number of panels in each string
If it is necessary to replace the unit, please ship it in the original box.
9.2.1 System fault
System fault (system faults are mainly caused by system instead of inverter, please
check the items as instructed below before replacing inverter)
Error message
No AC Connection
AC V Outrange
Description
N o u t i l i t y g r i d
connected or utility
grid power failure.
Utility grid voltage I
s out of permissible
range.
Suggestion
1.Check AC wiring, especially the
ground wire.
2.Contact Growatt
1.Check grid voltage.
2.If the error message still exists
despite the grid voltage being
within the tolerable range,
contact Growatt.
Output High DCI Output current DC
offset too high
1.Restart inverter.
2.If error message still exists,
contact Growatt.
PV Isolation Low Insulation problem 1.Check if panel enclosure ground
properly.
2.Check if inverter ground properly.
3.Check if the DC breaker gets wet.
4.Check the impedance of PV (+) &
PV (-) between ground (must be more
than 8 MΩ). If the error
message is displayed despite the
above checking passed, contact
Growatt.
Residual I High Leakage current
too high
1.Restart inverter.
2.If error message still exists,
contact Growatt.
PV Voltage High The DC input voltage
is exceeding the
maximum tolerable
value.
Disconnect the DC wire
immediately.
Error message Description Suggestion
AC F Outrange Utility grid frequency
out of permissible
range.
1.Check firmware version (Please
refer to LCD display section).
If firmware version is below G.1.3,
contact Growatt.
2.Check grid frequency.
3.If the error message is displayed
despite the grid frequency being
within the tolerable range, contact
Growatt.
Auto Test Failed Auto test didn’t passed Reboot inverter.