Goodwe CT90 User manual

User Manual
Power Limit Solution for Grid-Tied PV Inverters
V1.0-2022-09-15
WARNING
1. Power o the equipment in the system before operations and maintenance. Otherwise, the equipment may be damaged or
electric shocks may occur.
2. The installation, electrical connection, and commissioning of the inverter, smart meter, communication box and other devices
in the system are not mentioned in this document. Please refer to the related user manual from the ocial website: https://
en.goodwe.com/
General Safety
System Safety
Matching Table
NOTICE
• The information in this user manual is subject to change due to product updates or other reasons. This guide cannot replace
the product labels or the safety precautions in the user manual unless otherwise specied. All descriptions in the manual are for
guidance only.
• Before installations, read through the corresponding user manual to learn about the product and the precautions. Strictly follow
its requirements.
• All installations 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, cloths, and wrist strips when touching electron 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.
1 Safety Precaution
2 Networking
Product CT90 GM3000 HK3000 GM3000C SEC1000
DNS Series O× × × ×
XS Series O× × × ×
MS Series O× × × ×
NS Series O× × × ×
SDT G2 Series ×O O O O
SMT Series ×O O O O
MT Series ×O×O O
HV 1100 Series × × × O O
Note The load current shall be
less than 90A.
The load current of each phase shall be
less than 120A.
The load current of any phase shall be more
than 120A.
• For some inverter series, the power limit function is not available. Please contact After-sales Service if needed.
• In networking systems with GM3000C + EzLogger Pro, or SEC1000, the power limit function can be fullled for multiple inverters
in parallel.
• In networking systems with CT90, GM3000 or HK3000, it is only able to realize power limit function for single inverter.

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Power Limit Solution for Grid-Tied PV Inverters User Manual V1.0-2022-09-15
2.1 Single-Phase Inverter + CT90 Networking
No. Parts Description
1Inverter • Applicable inverters are DNS series, XS series, MS series and NS series.
• It is only applicable to install one inverter in the system, not for multiple inverters in parallel.
2 CT90 You can purchase CT from GoodWe with a standard length of 5 meters. Or select one with 30 meters in
length. The cable length of CT depends on the actual distance between the inverter and the entry point of the
distribution board.
3Load The load current shall be less than 90A.
WARNING
1. Make sure the CT direction is right during installing. If CT is installed reversely, the inverter will be triggered with an alarm and
unable to realize the power limit function.
2. The appearances of the inverter and its communication port for CT connection vary according to dierent types. Please refer to
the related inverter’s user manual or quick installation guide for specic CT wiring.
3. CT shall be snap tted on Cable L. Do not t it on Cable N.
Wiring Description
Parts Description
-
+
CT+
CT+
CT-
CT-
K
LN
L
Inverter
Distribution Board
Load
Utility Grid
PV String
CT90

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Power Limit Solution for Grid-Tied PV Inverters User Manual V1.0-2022-09-15
2.2 Three-Phase Inverter + GM3000 Networking
No. Parts Description
1Inverter • Applicable inverters are SDT G2 series, SMT series, and MT series.
• It is only applicable to install one inverter in the system, not for multiple inverters in parallel.
2 GM3000 Select whether to use GM3000 smart meter according to the maximum over current, the cables or the copper
busbar in the system. For details, please consult GoodWe Solar Academy for help. CT is delivered with the
smart meter.
3Load The load current of each phase shall be less than 120A.
WARNING
1. Make sure the CT direction is right during installing. If CT is installed reversely, the inverter will be triggered with an alarm and
unable to realize the power limit function.
2. The appearances of the inverter and its communication port for CT connection vary according to dierent types. Please refer to
the related inverter’s user manual or quick installation guide for specic CT wiring.
3. CT shall be snap tted on Cable L1, L2 and L3. Do not t it on Cable N.
Inverter
Loads
CT
GM3000
Utility Grid
Meter
PV String
Wiring Description
Parts Description

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Power Limit Solution for Grid-Tied PV Inverters User Manual V1.0-2022-09-15
2.3 Three-Phase Inverter + HK3000 Networking
Inverter
Load
Utility Grid
Meter
PV String
HK3000
No. Parts Description
1Inverter • Applicable inverters are SDT G2 series and SMT series.
• It is only applicable to install one inverter in the system, not for multiple inverters in parallel.
2 HK3000 Select whether to use HK3000 smart meter according to the maximum over current, the cables or the copper
busbar in the system. For details, please consult GoodWe Solar Academy for help. CT is delivered with the
smart meter.
3Load The load current of each phase shall be less than 120A.
WARNING
1. The place to snap t the CT shall be near the entry point in the right direction. “-->” of CT refers that the inverter current ows to
the Grid. If CT is installed reversely, the inverter will be triggered with an alarm and unable to realize the power limit function.
2. The appearances of the inverter and its communication port for CT connection vary according to dierent types. Please refer to
the related inverter’s user manual or quick installation guide for specic CT wiring.
3. CT shall be snap tted on Cable L1, L2 and L3. Do not t it on Cable N.
Wiring Description
Parts Description

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Power Limit Solution for Grid-Tied PV Inverters User Manual V1.0-2022-09-15
2.4 Three-Phase Inverter + GM3000C Networking
Inverter
Load
External CT
Utility Grid
Meter
PV String
GM3000C
System with Single Inverter
No. Parts Description
1Inverter Applicable inverters are SDT G2 series, SMT series, MT series and HT 1100V series.
2 GM3000C Prepare CT by yourself for external installation when selecting 3000C smart meter. Specication of CT:
1. Choose nA/5A for the current transformation ratio of the external CT. (n refers to CT primary input current
value, which is between 200 - 5000, chosen by the user according to the actual conditions. 5A refers to CT
secondary output current value.)
2. The sampling error for the CT current shall be ≤ 1% (the recommended precision is 0.5, 0.5s, 0.2, or 0.2s).
3. The recommended wire diameter for the CT secondary output cable is 1.5mm, corresponding to 1.5mm²
in cross-sectional area.
3Load The load current of any phase shall be more than 120A.
WARNING
1. The place to snap t the CT shall be near the entry point in the right direction. “-->” of CT refers that the inverter current ows to
the Grid. If CT is installed reversely, the inverter will be triggered with an alarm and unable to realize the power limit function.
2. The appearances of the inverter and its CT wiring port vary according to dierent types. Please refer to the related inverter’s
user manual or quick installation guide for specic CT wiring.
3. The CT bore diameter shall be bigger than the outer diameter of AC power cable, to ensure the AC power cable can be inserted
into CT.
4. For specic CT wirings, please refer to the documents provided by the respective manufacturer, to ensure that the wiring
direction is correct and CT is able to work properly.
5. CT shall be snap tted on Cable L1, L2 and L3. Do not install it on Cable N.
Wiring Description
Parts Description

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Power Limit Solution for Grid-Tied PV Inverters User Manual V1.0-2022-09-15
Inverter I
Router Monitoring
System
Inverter N
Load
Utility Grid
Meter
GM3000C
System with Multiple Inverters
External CT
No. Parts Description
1Inverter Applicable inverters are SDT G2 series, SMT series, MT series and HT 1100V series.
2 GM3000C Prepare CT by yourself for external installation when selecting 3000C smart meter in networking.CT
Specication:
1. Choose nA/5A for the current transformation ratio of the external CT. (n refers to CT primary input
current value, which is between 200 - 5000, chosen by the user according to the actual conditions. 5A
refers to CT secondary output current value.)
2. The sampling error for the CT current shall be ≤ 1% (the recommended precision is 0.5, 0.5s, 0.2, or 0.2s).
3. The recommended wire diameter for the CT secondary output cable is 1.5mm, corresponding to 1.5mm²
in cross-sectional area.
3EzLogger Pro Install an EzLogger Pro in systems with multiple inverters for power limit function.
4Load The load current of any phase shall be more than 120A.
WARNING
1. The place to snap t the CT shall be near the Grid-Tied entry point. Make sure the connecting direction is right. If CT is installed
reversely, it is unable to realize the power limit function.
2. The appearances of the inverter and its communication port for CT connection vary according to dierent types. Please refer to
the related inverter’s user manual or quick installation guide for specic CT wiring.
3. The CT bore diameter shall be bigger than the outer diameter of AC power cable, to ensure the AC power cable can be inserted
into CT.
4. For specic CT wirings, please refer to the documents provided by the respective manufacturer, to ensure that the wiring
direction is correct and CT is able to work properly.
5. CT shall be snap tted on Cable L1, L2 and L3. Do not t it on Cable N.
Wiring Description
Parts Description

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Power Limit Solution for Grid-Tied PV Inverters User Manual V1.0-2022-09-15
2.5 Three-Phase Inverter + SEC1000 Networking
No. Parts Description
1Inverter • Applicable inverters are SDT G2 series, SMT series, MT series and HT 1100V series.
• It is applicable to install one inverter or multiple inverters in the system.
2SEC1000 Prepare CT by yourself for external installation when selecting SEC1000.
3Load The load current of any phase shall be more than 120A.
No. Current Scope Description Note
1Imax< 250A CT 200A Acrel/AKH-0.66 (200A/5A) CT for power limit, closed type (born dimension 31mm*11mm,
Φ22mm)
CT 250A/5A Acrel/AKH-0.66-K-30x20-250/5 CT for power limit, open type (opening size 32mm*22mm), 0.5% in
precision
CT 250A/5A Acrel/AKH-0.66-K-60x40-250/5 CT for power limit, open type (opening size 62mm*42mm), 1.0% in
precision
2250A ≤Imax< 1000A CT 1000A/5A Acrel/AKH-0.66-K-60x40-1000/5 CT for power limit, open type (opening size 62mm*42mm), 0.5% in
precision
CT 1000A/5A Acrel/AKH-0.66-K-80x40-1000/5 CT for power limit, open type (opening size 82mm*42mm), 0.5% in
precision
CT 1000A/5A Acrel/AKH-0.66-K-80x80-1000/5 CT for power limit, open type (opening size 82mm*42mm), 0.5% in
precision
31000A ≤ Imax <
5000A
CT 5000A/5A Acrel/AKH-0.66-K-140x60-5000/5 CT for power limit, open type (opening size 142mm*62mm), 0.2% in
precision
CT 5000A/5A Acrel/AKH-0.66-K-160x80-5000/5 CT for power limit, open type (opening size 162mm*82mm), 0.2% in
precision
Based on the external CT test current, the recommended CT specication are:
Inverter I
Inverter N
Inverter II
SEC1000
Utility Grid
Transformer
PV String
PV String
PV String
Router Monitoring System
-
+
CT
AC
AC
AC
LAN
RS485
RS485
-
+
-
+
Parts Description

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Power Limit Solution for Grid-Tied PV Inverters User Manual V1.0-2022-09-15
• Non-MT Series and Non-SMT Series Inverters;
• Inverters with LCD;
• Inverters nished wiring and power on.
Preconditions
Operations for Inverters with LCD
Steps
3 Parameter Setting
3.1 Setting Power Limit Parameters via LCD
• Stop pressing the button for a period on any page, the LCD will get dark and go back to the initial page.
• Short press the button to switch menu or adjust parameter values.
• After adjusting the parameter values, long press the button, and the parameters will be set successfully; enter into the sub menu.
Notice
• Below User Interface (UI) gures in this document are from DNS series inverters with rmware version V1.00.00 and communication
version V1.00. The screenshots are for reference only. For detail information, please nd in the related inverter’ user manual to
set the parameters.
• The name, range, and default value of the parameters are subject to change or adjust. The actual display prevails.
• The power parameters should be set by professionals, to prevent the generating capacity from being inuenced by wrong
parameters.
Step 1 (Optional) Set the safety country/region in compliance with the local grid standards and application scenario of the inverter.
Step 2 Short press the buttons on the LCD till “Set the power limit value” appearing.
Step 3 Set the “power limit value” according to the power value which is actually able to feed back into the utility grid.
WARNING
1. Connect SEC1000 AC cable to a 3L/N/PE Grid. The voltage of the Grid shall be within allowable voltage sampling scope of
SEC1000.
2. The place to snap t the CT shall be near the Grid-Tied entry point. Make sure the connecting direction is right. If CT is installed
reversely, it is unable to realize the power limit function.
3. The appearances of the inverter and its communication port for CT connection vary according to dierent types. Please refer to
the related inverter’s user manual or quick installation guide for specic CT wiring.
4. The CT bore diameter shall be bigger than the outer diameter of AC power cable, to ensure the AC power cable can be inserted
into CT.
5. For specic CT wirings, please refer to the documents provided by the respective manufacturer, to ensure that the wiring
direction is correct and CT is able to work properly.
6. CT shall be snap tted on Cable L1, L2 and L3. Do not t it on Cable N.
If none of the above conditions can be satised, no EzLogger Pro or SEC1000 applied in the system as well, you can set the related
parameters via SolarGo App.
Wiring Description
Short press
Short press
Short press Short press Short press
Short press
Short press Short press
Long press for 2s Long press for 2s
Long press for 2s Long press for 2s
Long press for 2s
Long press for 2s Long press for 2s
Long press for 2s
Long press
for 2s
Long press for 2s
Long press for 2s
Long press for 2s
Long press for 2s
Shadow MPPT ON
Pac = xxx W
Shadow MPPT OFF
Pac = xxx W
Power Limit
Pac = xxx W
Set OK
Set Fail
Time Interval
010 min
Time Interval
010 min
Time Interval
010 min
Soft Limit ON Set Power Limit
XX%
Set Power Limit
XXX%
Set Power Limit
X
X
XX%
Set OK
Set Fail
Set OK
Set Fail
Soft Limit OFF
Hard Limit ON
Hard Limit OFF
Wait
Wait
Wait
Select Country /
Region Country code 1 Country code 1 Normal
Pac=XXX.XX W

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Power Limit Solution for Grid-Tied PV Inverters User Manual V1.0-2022-09-15
3.2 Setting Power Limit Parameters via SolarGo App
• Inverters nished wiring and power on;
• Inverters connected with WiFi, LAN, 4G, GPRS, Bluetooth or Wi-Fi/LAN module, and in normal communication.
Preconditions
Operations
Notice
• All the UI gures in this document are based on SolarGo App V4.0.2. The UI may be dierent due to the version upgrading. The
data on the UI screenshots is for reference only.
• The method to set parameters is the same for all inverters. But the parameters displayedwill be dierent based on the inverter
model.
• Before setting any parameters, read through this document and the related inverter’s user manual to learn the product
functions and features. If the inverter parameters are set improperly, operations such as issuing start or stop griding command
to the inverter may fail or not in compliance with the related requirements, thus aecting the inverter’s power generation.
• For more details, refer to the SolarGo APP User Manual. Visit https://en.goodwe.com/Ftp/EN/Downloads/User%20Manual/GW_
SolarGo_User%20Manual-EN.pdf or scan below QR to get the user manual.
Step 1 Download the APP.
Step 2 Log into the APP.
SolarGo App
User Manual
Method I Search SolarGo in Google Play
(Android) or App Store (iOS); Method II Scan below QR.
play
App Store
SolarGo
SolarGo App
Notice
Type the original password to log in for the rst time. Modify the password as soon as possible and remember the new one. To
ensure a safe account, modify the password regularly.
3
• Initial password for Bluetooth/
WiFi: 1234
• Initial password for 4G:
automatically ll in
• Initial Password for GPRS: the
last 4 digits of Inverter bar code.
2
1
• When using WiFi, LAN, Bluetooth
modules, tap “WiFi&Bluetooth”
on the UI;
• When using GPRS or 4G module,
click “GPRS” on the UI.
4
• Bluetooth: SOL-BLE********
• WiFi: SOL-WiFi********
• The original password of WiFi:
12345678
• When using GPRS or 4G module,
scan the device’s QR.
• * refers to the last 8 digitals of
the inverter SN.

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Power Limit Solution for Grid-Tied PV Inverters User Manual V1.0-2022-09-15
Step 3 Tap Home > More > Advanced Setting > Power Limit Settings to enter into the parameter setting page.
Step 4 Enter the parameters based on actual needs, tap “√” and the parameters are set successfully.
No. Parameters Description
1Export/Power Limit Enable Export/Power Limit when power limiting is required by local grid standards and
requirements.
2Mode Select the power limit model according to the applied scenarios under local region and country’s
requirement. The current software is available both for single phase and three phase power limit.
3Export Power Set the value based on the actual maximum power feed into the utility grid.
4External CT Ratio Set the ratio of the primary current to the secondary current of the external CT.
5Export Power Limit
Protection After enabling this function, the inverter will stop grid tying once the export power limit fails.
3.3 Setting Power Limit Parameters via ProMate
• Already obtained ProMate from the website and installed it in computer;
• Already nished the inverter wiring and power on. No fault has occurred;
• Set power limit parameters via ProMate software when EzLogger Pro or SEC1000 is connected in the system.
Notice
• Before setting any parameters, read through this document and the related inverter’s user manual to learn the product
functions and features. If the inverter parameters are set improperly, operations such as issuing start or stop griding
commands to the inverter may fail or not in compliance with the related requirements, thus aecting the inverter’s power
generation.
• For more details, refer to SEC1000 User Manual. Visit https://en.goodwe.com/Ftp/EN/Downloads/User%20Manual/GW_SEC1000_
User%20Manual-EN.pdf or scan below QR to get the user manual.
• For more details, refer to EzLogger Pro User Manual. Visit https://en.goodwe.com/Ftp/EN/Downloads/User%20Manual/GW_
Ezlogger%20Pro_User%20Manual-EN.pdf or scan below QR to get the user manual.
SEC1000
User Manual
EzLogger Pro
User Manual
Preconditions
Operations

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Power Limit Solution for Grid-Tied PV Inverters User Manual V1.0-2022-09-15
Step 1 SEC1000 is in the dynamic IP mode as default. Connect the SEC1000 NET port to the Router LAN port with the network cable.
(Press RELOAD button for about 4 seconds, and the EzLogger Pro inside of SEC1000 is reset and switched to dynamic IP mode.)
Step 2 Connect the computer to the Router network for communication.
Step 2 The IP addresses for the computer and EzLogger Pro shall be in the same network segment. Set the computer IP
address at 192.168.1.xxx (1 ≤XXX ≤250 and XXX ≠200).
Step 3 Set the Total Capacity, Power Limit and Ratio of CT, then click “Export Enab” on ProMate UI to nish export power limit setting.
Step 3 Set the Total Capacity, Power Limit and Ratio of CT, then click “Export Enab” on ProMate UI to nish export power limit setting.
Step 4 Monitor the data such as Active Power, Voltage and Current on ProMate UI in real time, ensuring power limit function is
enabled.
Step 4 Monitor the data such as Active Power, Voltage and Current on ProMate UI in real time, ensuring power limit function is
enabled.
Step 1 Press RELOAD button for about 10 seconds, and the EzLogger Pro inside of SEC1000 is reset and switched to static IP mode.
(The default IP:192.168.1.200 and default gateway: 192.168.1.254)
Log Info: conrm whether the operation is nished.
Inverter List: conrm
whether the online
quantity is accurate.
Parameter Setting (for Dynamic IP Mode)
Parameter Setting (for Static IP Mode)
ProMate UI

GoodWe Technologies Co.,Ltd.
No. 90 Zijin Rd., New District, Suzhou, 215011, China
www.goodwe.com
[email protected]
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Power Limit Solution for Grid-Tied PV Inverters User Manual V1.0-2022-09-15
• Power limit for single inverter: when the communication is disconnected, the inverter can derate based on the
setting power limit percentage.
• Power limit for multiple inverters: when the communication with SEC1000 or EzLogger Pro is disconnected, the
inverters continue to run for 10 minutes and then become standby. If it is disconnected with the smart meter, the
inverters are able to run based on the setting power limit percentage.
4 Troubleshooting