Goodwe UT Series User manual

User Manual
Grid-Tied PV Inverter
UT Series
V1.0-2023-3-20

I
Copyright StatementUser Manual V1.0-2023-03-20
No part of this manual can be reproduced or transmitted to the public platform in any form or
by any means without the prior written authorization of GoodWe Technologies Co.,Ltd.
The information in this user manual is subject to change due to product updates or other
reasons. This manual cannot replace the safety instructions or labels on the equipment unless
otherwise specied. All descriptions here are for guidance only.
Copyright ©GoodWe Technologies Co.,Ltd. 2023. All rights reserved.
Trademarks
NOTICE
and other GOODWE trademarks are trademarks of GoodWe Technologies
Co.,Ltd. All other trademarks or registered trademarks mentioned in this manual are owned by
the company.

II
Content User Manual V1.0-2023-03-20
CONTENT
1 About This Manual .................................................................1
1.1 Applicable Model.........................................................................................1
1.2 Target Audience...........................................................................................1
1.3 Symbol Denition........................................................................................2
1.4 Updates ........................................................................................................2
2 Safety Precaution...................................................................3
2.1 General Safety .............................................................................................3
2.2 PV String Safety ...........................................................................................3
2.3 Inverter Safety .............................................................................................4
2.4 Personnel Requirements............................................................................4
2.5 EU Declaration of Conformity....................................................................5
3 Product Introduction.............................................................6
3.1 Product Overview ........................................................................................6
3.2 Supported Grid Types..................................................................................6
3.3 Features........................................................................................................7
3.3 Circuit Diagram.............................................................................................8
3.4 Appearance................................................................................................10
3.4.1 Parts......................................................................................................................10
3.4.2 Dimensions ..........................................................................................................12
3.4.3 Indicators .............................................................................................................12
3.4.4 Nameplate ..........................................................................................................13
4 Check and Storage ...............................................................14
4.1 Check Before Receiving ............................................................................14
4.2 Deliverables................................................................................................14
4.3 Storage .......................................................................................................15
5 Installation ...........................................................................16
5.1 Installation Requirements........................................................................16
5.2 Inverter Installation ..................................................................................19
5.2.1 Moving the Inverter............................................................................................19
5.2.2 Installing the Inverter.........................................................................................20
5.2.3 Installing the Inverter.........................................................................................21

III
CONTENT
User Manual V1.0-2023-03-20
6 Electrical Connection...........................................................23
6.1 Safety Precaution ...................................................................................... 23
6.2 Connecting the PE cable........................................................................... 25
6.3 Connecting the PV Input Cable ............................................................... 25
6.4 Connecting the AC Output Cable ............................................................. 29
6.5 Communication Connection .................................................................... 32
6.5.1 Connecting RS485 Communication Cable ...................................................... 32
6.5.2 Connecting PLC Communication Cable............................................................ 34
6.5.3 Installing the Communication Module (Optional) .......................................... 35
7 Equipment Commissioning.................................................36
7.1 Check Before Power ON ........................................................................... 36
7.2 Power On.................................................................................................... 36
8 System Commissioning .......................................................37
8.1 Indicators and Buttons............................................................................. 37
8.2 Setting Inverter Parameters via LCD ...................................................... 38
8.3 Setting Inverter Parameters via App ..................................................... 40
8.3 Monitoring via SEMS Portal ..................................................................... 40
9 Maintenance.........................................................................41
9.1 Power OFF the Inverter ............................................................................ 41
9.2 Removing the Inverter.............................................................................. 41
9.3 Disposing of the Inverter ......................................................................... 41
9.4 Troubleshooting ........................................................................................ 42
9.5 Routine Maintenance................................................................................ 48
10 Technical Parameters ........................................................49

1
01 About This ManualUser Manual V1.0-2023-03-20
1 About This Manual
1.1 Applicable Model
1.2 Target Audience
This manual describes the product information, installation, electrical connection, commissioning,
troubleshooting, and maintenance. Read through this manual before installing and operating the
product. All the installers and users have to be familiar with the product features, functions, and
safety precautions. This manual is subject to update without notice. For more product details and
latest documents, visit https://en.goodwe.com.
This manual applies to trained and knowledgeable technical professionals. The technical
personnel has to be familiar with the product, local standards, and electric systems.
This manual applies to the listed inverters below (UT for short) :
Model Nominal Output Power Nominal Output Voltage
GW320K-UT 320kW
800V,3L/PE
GW320KH-UT
GW350K-UT 350kW
GW350KH-UT

2
01 About This Manual User Manual V1.0-2023-03-20
1.3 Symbol Denition
1.4 Updates
The latest document contains all the updates made in earlier issues.
V1.0 03/20/2023
First Issue
Dierent levels of warning messages in this manual are dened as follows:
DANGER
Indicates a high-level hazard that, if not avoided, will result in death or serious injury.
WARNING
Indicates a medium-level hazard that, if not avoided, could result in death or serious injury.
CAUTION
Indicates a low-level hazard that, if not avoided, could result in minor or moderate injury.
NOTICE
Highlights key information and supplements the texts. Or some skills and methods to solve
product-related problems to save time.

3
02 Safety PrecautionUser Manual V1.0-2023-03-20
2 Safety Precaution
2.1 General Safety
2.2 PV String Safety
NOTICE
• The information in this user manual is subject to change due to product updates or other
reasons. This manual cannot replace the safety instructions or labels on the equipment
unless otherwise specied. All descriptions here are for guidance only.
• Before installations, read through the user manual to learn about the product and the
precautions.
• All operations should be performed by trained and knowledgeable technicians who are
familiar with local standards and safety regulations.
• Use insulating tools and wear personal protective equipment when operating the
equipment to ensure personal safety. Wear anti-static gloves, clothes, and wrist strips
when touching electronic devices to protect the inverter from damage.
• Strictly follow the installation, operation, and conguration instructions in this manual.
The manufacturer shall not be liable for equipment damage or personal injury if you do
not follow the instructions. For more warranty details, please visit https://en.goodwe.com/
warranty.
NOTICE
The inverters are designed and tested strictly to comply with related safety rules. Read and
follow all the safety instructions and cautions before any operations. Improper operation might
cause personal injury or property damage as the inverters are electrical equipment.
DANGER
• Connect the DC input cables using the included PV connectors or terminals. Severe
damage might happen if other types of PV connectors or terminals are used, which is
beyond the manufacturer’s liability.
• Do not connect the inverter to PV string that requires positiver or negative grounding.
WARNING
• Ensure the component frames and the bracket system are securely grounded.
• Ensure the DC cables are connected tightly, securely and correctly.
• Measure the DC cables with a multimeter to avoid reverse polarity connection. Also, the
voltage should be under the permissible range.
• Do not connect one PV string to more than one inverter at the same time. Otherwise, it
may damage the inverter.
• Ensure that the positive or negative poles of the PV string do not short-circuit to the
ground. Otherwise, severe damage might happen, which is beyond the manufacturer’s
liability.

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02 Safety Precaution User Manual V1.0-2023-03-20
DANGER
• Do not apply mechanical load to the terminals, otherwise the terminals can be damaged.
• All labels and warning marks should be visible after the installation. Do not scrawl,
damage, or cover any label on the device.
• Warning labels on the inverter are as follows.
2.4 Personnel Requirements
NOTICE
• Personnel who install or maintain the equipment must be strictly trained, learn about
safety precautions and correct operations.
• Only qualied professionals or trained personnel are allowed to install, operate, maintain,
and replace the equipment or parts.
DANGER High voltage hazard.
Disconnect all incoming
power and turn o the
product before working on it.
Delayed discharge. Wait
5 minutes after power o
until the components are
completely discharged.
Read through the user
manual before any
operations.
Potential risks exist. Wear
proper PPE before any
operations.
High-temperature hazard. Do
not touch the product under
operation to avoid being
burnt.
Grounding point.
CE Mark Do not dispose of the inverter
as household waste.Discard
the product in compliance
with local laws and
regulations, or send it back to
the manufacturer.
2.3 Inverter Safety
WARNING
• The voltage and frequency at the connection point meet the inverter grid connection
requirements.
• Additional protective devices like circuit breakers or fuses are recommended on the AC
side. Specication of the protective device should be at least 1.6 times the maximum AC
output current.
• Make sure that all the grounding cables are tightly connected. When there are multiple
inverters, make sure that all the grounding points on the enclosures are equipotental
connected.
• You are recommended to use copper cables as AC output cables. A copper to aluminum
adapter terminal is required when an aluminum cable is used.

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02 Safety PrecautionUser Manual V1.0-2023-03-20
2.5 EU Declaration of Conformity
GoodWe Technologies Co., Ltd. hereby declares that the inverter with wireless communication
modules sold in the European market meets the requirements of the following directives:
• Radio Equipment Directive 2014/53/EU (RED)
• Restrictions of Hazardous Substances Directive 2011/65/EU and (EU) 2015/863 (RoHS)
• Waste Electrical and Electronic Equipment 2012/19/EU
• Registration, Evaluation, Authorization and Restriction of Chemicals (EC) No 1907/2006
• (REACH)
GoodWe Technologies Co., Ltd. hereby declares that the inverter without wireless
communication modules sold in the European market meets the requirements of the following
directives:
• Electromagnetic compatibility Directive 2014/30/EU (EMC)
• Electrical Apparatus Low Voltage Directive 2014/35/EU (LVD)
• Restrictions of Hazardous Substances Directive 2011/65/EU and (EU) 2015/863 (RoHS)
• Waste Electrical and Electronic Equipment 2012/19/EU
• Registration, Evaluation, Authorization and Restriction of Chemicals (EC) No 1907/2006
• (REACH)
You can download the EU Declaration of Conformity on https://en.goodwe.com.

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03 Product Introduction
For Re-
view
User Manual V1.0-2023-03-20
3 Product Introduction
3.1 Product Overview
The UT Series inverter is a three-phase PV string grid-tied inverter. The inverter converts the DC
power generated by the PV module into AC power and feeds it into the utility grid. The intended
use of the inverter is as follows:
3.2 Supported Grid Types
The UT inverter supports IT grid type.
Inverter
PE
L1
L2
L3
Transformer
PV string Inverter
Box-type
transformer
Utility
grid

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03 Product IntroductionUser Manual V1.0-2023-03-20
3.3 Features
Power derating
For a safe operation, the inverter will automatically reduce the output power when the operating
environment is not ideal.
The following are the factors that may occur power derating. Please try to avoid them when the
inverter is working.
• Unfavorable environmental conditions, e.g., direct sunlight, high temperature, etc.
• Inverter's output power percentage has been set.
• Over-frequency derating.
• Higher input voltage value.
• Higher input current value.
Reactive power control At night (SVG, optional)
To improve the power generation performance of the power station at night, the inverter
supports night SVG function. Issuing a reactive power compensation command via the power
station monitoring platform, which makes the inverter keep working even when there is no
active power output.
Weak grid support
Short circuit ratio (SCR) of the grid system determines the strength of the grid. The grid is
dened as a weak grid when SCR is less than 10.
The weak grid support function keeps the inverter be on-grid and output current steadly even
when the SCR is higher than 1.2.
355
350
345
340
335
330
325
320
315
310
305
300
3000 3200 3400 3600 3800 4000 4200 4400 4600 4800 5000
Output power (kW)
Altitude (m)
Example: output power derating due to altitude change

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03 Product Introduction
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Replace the fan on-grid
Disconnect a single inverter from the utility grid and change its fan, which means the power
generation of other inverters in the power station will not be inuenced.
Potential Induced Degradation (PID, optional)
When the inverter is connected to the grid, the potential dierence between the negative pole of
the PV array and the module frame decreases the energy generated by the PV modules. That is
the PID eect.
• Anti-PID function
The inverter rises the voltage of the negative pole of the PV array to ground through the PID
module. When the voltage to ground is close to zero, the PID eect is suppressed.
• PID recovery function
The inverter rises the voltage of the negative pole of the PV array to ground to approx. 1/2 DC
BUS voltage through the PID module to recover the PID eect.
Anti-PID function and PID recovery function can work properly only when the inverter is applied
to an IT system.

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03 Product IntroductionUser Manual V1.0-2023-03-20
3.3 Circuit Diagram
GW320KH-UT/GW350KH-UT
PV1+ PV1- PV2+ PV2- PV3+ PV3- PV4+ PV4- PV5+ PV5- PV6+ PV6- PV7+ PV7- PV8+ PV8- PV9+ PV9-
PV10+ PV10- PV11+ PV11-
PV12+ PV12-
DC switch 1
DC switch 2
DC switch 3
DC switch 4
DC SPD
DC SPD
DC SPD
DC SPD DC SPD DC SPD
DC SPD
DC SPD
DC SPD DC SPD DC SPD DC SPD
AC SPD
MPPT1
MPPT2 MPPT3 MPPT4 MPPT5
MPPT6
MPPT7
MPPT8
MPPT9
MPPT10 MPPT11
MPPT12
DC EMI DC EMI DC EMI
DC EMI DC EMI
DC EMI
DC EMI
DC EMI DC EMI
DC EMI DC EMI DC EMI
DC/AC
inverter
circuit
LC
lter
Output
EMI
lter
L1 L2 L3
PE
Output
Disconnecting
Relay
L lter

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03 Product Introduction
For Re-
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User Manual V1.0-2023-03-20
GW320K-UT/GW350K-UT
PV1+ PV1- PV2+ PV2- PV3+ PV3- PV4+ PV4- PV5+ PV5- PV6+ PV6- PV7+ PV7- PV8+ PV8- PV9+ PV9-
PV10+ PV13+ PV10- PV13- PV11+ PV14+ PV11- PV14-
PV12+ PV15+ PV12- PV15-
DC switch 1
DC switch 2
DC switch 3
DC switch 4 DC switch 5
DC SPD
DC SPD
DC SPD
DC SPD DC SPD DC SPD
DC SPD
DC SPD
DC SPD DC SPD DC SPD DC SPD DC SPD DC SPD DC SPD
AC SPD
MPPT1
MPPT2
MPPT3 MPPT4 MPPT5
MPPT6
MPPT7
MPPT8
MPPT9
MPPT10 MPPT11
MPPT12
MPPT13
MPPT14
MPPT15
DC EMI
DC EMI
DC EMI
DC EMI DC EMI
DC EMI
DC EMI
DC EMI DC EMI
DC EMI DC EMI DC EMI DC EMI DC EMI DC EMI
DC/AC
inverter
circuit
LC
Filter
Output
EMI
lter
L1 L2 L3
PE
Output
Disconnecting
Relay
L lter

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03 Product IntroductionUser Manual V1.0-2023-03-20
3.4 Appearance
3.4.1 Parts
26
27
252422 23
21
1
8
2
9
3
10
4
11
5
12 13 14 15 16
17 18 19 20
67
No. Parts Description
1 DC switch reset button 1
Reset the DC switch manually if it is tripped due to
the inverter fault. Press the RESET button using the
reset tool and turn the switch from OFF to ON. Con-
trols DC switch 1-3.
2DC switch 1-3 (DC SWITCH 1-3) Controls PV input terminal 1-3 (MPPT 1-3) to connect
or disconnect the PV string.
3PV input terminal 1-3 (MPPT1-3) Controlled by DC switch 1-3. Used to connect the PV
strings.
4 PV input terminal 7-9 (MPPT7-9)Controlled by DC switch 7-9. Used to connect the PV
strings.
5 DC switch reset button 2 Controls DC switch 4-6.
6DC switch 7-9 (DC SWITCH 7-9) Controls PV input terminal 7-9 (MPPT 7-9) to connect
or disconnect the PV string.
7PV input terminal 10-12 (MPPT10-
12)
Controlled by DC switch 10-12. Used to connect the
PV strings.

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03 Product Introduction
For Re-
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No. Parts Description
8 DC switch reset button 3 Controls DC switch 7-9.
9DC switch 4-6 (DC SWITCH 4-6) Controls PV input terminal 4-6 (MPPT 4-6) to connect
or disconnect the PV string.
10 PV input terminal 4-6 (MPPT4-6) Controlled by DC switch 4-6. Used to connect the PV
strings.
11 PV input terminal 13-15 (MPPT13-
15)
Controlled by DC switch 13-15. Used to connect the
PV strings. Only for GW320KH-UT and GW350KH-UT.
12 DC switch reset button 4 Controls DC switch 10-12.
13 DC switch 13-15 (DC SWITCH
13-15)
Controls PV input terminal 13-15 (MPPT 13-15)
to connect or disconnect the PV string. Only for
GW320KH-UT and GW350KH-UT.
14 Ventilation valve -
15 DC switch reset button 5 Controls DC switch 13-15. Only for GW320KH-UT and
GW350KH-UT.
16 DC switch 10-12 (DC SWITCH
10-12)
Controls PV input terminal 10-12 (MPPT 10-12) to
connect or disconnect the PV string.
17 Communication module port
(COM1)
Connects a communication module, like a Bluetooth
module.
18 RS485 communicaiton port
(COM2)
For RS485 communication between inverters, a
smart communication unit, or a smart datalogger.
19
Remote shutdown or emergency
shutdown communication port
(COM3)
Connects communication cable for remote shutdown
or emergency shutdown.
Remote shutdown for Europe. Emergency shutdown
for India.
20 AC cable outlet hole Route the AC output cables through the cable outlet
hole.
21 LED Indicator Indicates working state of the inverter.
22 LCD (optional) Optional. To check the parameters of the inverter.
23 Button (optional) Optional. To control contents displayed on the
screen.
24 Grounding point Connects grounding cables to the two grounding
points for protection.
25 AC cable wiring box
Protects the AC output cables. Connects or
disconnects the AC cables after opening the AC
wiring box.
26 Mounting handles
Two mounting handles To attach the handles, move
the inverter, and hand the inverter to the moungting
bracket.
27 Bottom handles
Two bottom handles. To attach the handles, move
the inverter, and hand the inverter to the moungting
bracket.

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03 Product IntroductionUser Manual V1.0-2023-03-20
3.4.3 Indicators
3.4.2 Dimensions
1120mm 368mm
928mm
810mm
280mm
Indicator Status Description
ON= EQUIPMENT POWER ON
OFF= EQUIPMENT POWER OFF
ON= THE INVERTER IS FEEDING POWER
OFF= THE INVERTER IS NOT FEEDING POWER
SINGLE SLOW FLASH= SELF CHECK BEFORE CONNECTING TO
THE GRID
SINGLE FLASH = CONNECTING TO THE GRID
ON= WIRELESS IS CONNECTED/ACTIVE
BLINK 1 = WIRELESS SYSTEM IS RESETTING
BLINK 2 = WIRELESS ROUTER PROBLEM
BLINK 4 = WIRELESS SERVER PROBLEM
BLINK = RS485 IS CONNECTED
OFF= WIRELESS IS NOT ACTIVE
ON= A FAULT HAS OCCURRED
OFF= NO FAULT

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03 Product Introduction
For Re-
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User Manual V1.0-2023-03-20
3.4.4 Nameplate
The nameplate is for reference only.
GOODWE trademark, product type,
and product model
Technical parameters
Safety symbols and certication
marks
Contact information and serial
number
Model
Product: Grid-Tied PV Inverter
: GW***-UT
P.F. ~1,0.8cap...0.8ind,: Toperating:-**~+** ℃
Output
UDCmax :*** Vd.c .
UMPP:*** Vd.c.
IDC,max:*** Ad.c.
ISC PV:*** Ad.c
UAC, r:3 L/PE~ ***V a.c .
fAC, r:***Hz
IAC,max:***Aa.c.
Sr:  *** VAk
S max: VA ***k
PV Input
PAC,r: W***k
Non-isolated, IP66 , Protective Clas s I, OVC DCII/ACIII
Good We Technologies Co., Ltd.
No.9 0 Ziji n Rd., Ne w District , Suzhou, 2150 11, Chin a
S/ N
ALT: 5000m (>4000m derating)

15
04 Check and StorageUser Manual V1.0-2023-03-20
4 Check and Storage
4.1 Check Before Receiving
4.2 Deliverables
Check the following items before receiving the product.
Check the outer packing box for damage, such as holes, cracks, deformation, and other signs of
equipment damage. Do not unpack the package and contact the supplier as soon as possible if
any damage is found.
Check the inverter model. If the inverter model is not what you requested, do not unpack the
product and contact the supplier.
Check the deliverables for correct model, complete contents, and intact appearance. Contact the
supplier as soon as possible if any damage is found.
NOTICE
* The bluetooth module is optional, and delivered individually.
• Connect the DC cables with the delivered PV connectors. The manufacturer shall not be
liable for the damage if other terminals are used.
• N represents the accessories’ quantity delivered varies depending on the specic inverter
type. The number of PV connectors and the PV terminals in the inverter is the same.
Inverter x 1 Mounting plate x 1
Screws x 2 Bluetooth
module x N*
PIN terminal x 6
Screw for assembling
the plate x 6 Documents *1
Expansion bolt
x 4
PV connector x N
or
Communication
connector x 1 Screwdriver x 1

16
04 Check and Storage User Manual V1.0-2023-03-20
4.3 Storage
If the equipment is not to be installed or used immediately, please ensure that the storage
environment meets the following requirements:
1. Do not unpack the outer package or throw the desiccant away.
2. Store the equipment in a clean place. Make sure the temperature and humidity are
appropriate and no condensation.
3. The height and direction of the stacking inverters should follow the instructions on the
packing box.
4. The inverters must be stacked with caution to prevent them from falling.
5. If the inverter has been long term stored, it should be checked by professionals before being
put into use.