Disclaimer: The material in this document has been prepared by Sungrow Australia Group Pty. Ltd. ABN 76 168 258 679 and is intended as a guideline to assist solar installers for troubleshooting. It is not a statement or advice on any of the Electrical or Solar Industry standards or guidelines. Please observe all OH&S regulations when working on Sungrow equipment.
Version: 1.2 | Revision History: Issued for Approval | Created by: AU Service Team | Date: 29th Jan 2021
This document applies to Sungrow Power three-phase inverters (including SG5KTL-MT, SG10 KTL-MT, SG15KTL-M, SG20KTL-M) with Logger1000. The information may contain predictive statements; actual results could differ. This information is for reference only.
1. Introduction
This quick guide should be read with Sungrow's User Manuals and 3-phase KTL series inverters. For multiple inverters, commissioning is performed via the Logger1000, with components connected via standard RS485 daisy-chain topology. A 3-phase energy meter is required for export control and load consumption. The default baud rate for the energy meter is 9600, which can be changed in the Logger1000 under "System/Interface/RS485". Use shielded twisted pair cable with a minimum CSA of 0.75mm², with a maximum total cable length of 1,200m (a 120 Ohm resistor should be terminated).
Diagram illustrating the RS485 daisy-chain connection: Inverter 1 connected to Inverter 2, and both connected to the Logger 1000. A separate connection shows the 3-Phase meter linked to the Logger 1000.
Table: RS485 communication cable specifications. Type: Shielded twisted pair. Recommended cross-section: 0.75mm²~1.5mm².
NOTICE: The RS485 communication cable must be the shielded twisted pair with the shielding layer single-point grounded.
2. RS485 Connections
2.1 Inverter Connection (Daisy Chain)
The RS485 is connected by RJ45 connector at the inverter end and terminated cable at the logger end. Connect the RJ45 plug to the front COM port on the inverter via the supplied shroud.
Illustration of an RJ45 connector being attached to the inverter's COM port (Terminal 2).
Note: Make sure to plug into the COM port on the inverter (Terminal 2). DO NOT plug into the RS485 port (Terminal 5).
If the Sungrow KTL series inverter has only one COM port, a third-party RJ45 splitter is required for daisy-chain RS485 connections.
Visual comparison of an RJ45 splitter: a correct 8-pin to 8-pin splitter (✔️) and an incorrect 8-pin to 4-pin splitter (❌).
Note: Make sure the splitter splits 8-pin cable into two 8-pin outputs. Some splitters divide 8-pin cables into two groups of 4-pin outputs, which will not work.
RS485 wiring diagram showing Inverter 1 and Inverter 2 daisy-chained to the Logger 1000 via RS485 A/B lines. The 3-Phase meter is also connected to the Logger 1000.
Note: Never connect the meter to the same RS485 terminals as the inverters.
2.2 Energy Meter Connection
For supplies smaller than 80 Amps, use the DTSU666 with inbuilt CTs. For installations larger than 80 Amps, select appropriate CT ratings; the secondary current of the CT should be 5A. CT ratios can be set on Logger1000.
The corresponding RJ45 pinouts are: Pin 3 (White-green) to RS485- B and Pin 6 (Green) to RS485+ A.
Cable Color Coding: Cable 1: White-orange, Cable 2: Orange, Cable 3: White-green, Cable 4: Blue, Cable 5: White-blue, Cable 6: Green, Cable 7: White-brown, Cable 8: Brown. Cables 3 and 6 are used for communication.
On the DTSD1352 energy meter side, terminal 21 connects to the Green cable (RS485+ A) and terminal 22 connects to the White/Green cable (RS485- B).
Diagram showing the DTSD1352 energy meter's connection terminals, with the green cable (RS485+ A) connected to terminal 21 and the white/green cable (RS485- B) to terminal 22.
Connect to Logger1000 via the RS485 cable from the energy meter on RS485 port A2 and B2.
2.3 Connection to Logger1000
Connect the RS485 communications from the inverter(s) via A1/B1 and the energy meter via A2/B2 (or A3/B3 if A2/B2 is occupied by inverters) to the Logger1000.
Illustration of the Logger1000's RS485 ports: A1/B1 for inverters (COM1) and A2/B2 for the energy meter (COM2).
On the Logger1000 side, A1 and B1 are terminals for inverter connection (displayed as COM1 on the web portal). A2 and B2 are terminals for energy meter connection (displayed as COM2 on the portal).
3. Web Portal Setup
3.1 Access Web Portal
Use a smart device or laptop with Wi-Fi to search for the SG********** network (corresponding to the Logger1000 serial number). Connect to the network; use the serial number as the password if required.
Illustration of a smart device connecting to the Logger1000's Wi-Fi network (SSID: SG**********, Password: Serial Number).
Open a web browser and enter the IP address 11.11.11.1 to access the Logger1000 web page.
Screenshots depicting the Logger1000 web interface accessible on a PC, iPad, and smartphone.
Log in using the password "pw1111". A help window may appear for first-time users.
3.2 Set Local Time
Navigate to System > System Time. Set the Clock Source to 'NTP' and the Time Zone to 'UTC+10:00' (e.g., Brisbane), then click Save.
Screenshot of the Logger1000 web interface's 'System Time' settings, showing Clock Source set to 'NTP' and Time Zone to 'UTC+10:00'.
3.3 Scan for Inverters
Navigate to Device > Device List and click 'Auto search'. Sungrow inverters will be detected if correctly connected and energized.
Screenshot of the Logger1000 web interface's 'Device List' with an 'Auto search' function. It shows detected inverters and their communication status (green checkmark ✔️ for connected).
Confirm the communication status for each device. A green icon ✔️ indicates a working connection; a red icon ❌ indicates no connection between the Logger1000 and the device.
3.4 Add Energy Meter
The energy meter must be manually added, similar to other 3rd party equipment. Click 'Add device', select the device type (Meter), and fill in the required information. For the DTSD1352 energy meter, the device address is 254.
If the meter is connected via A2/B2 on the Logger1000, the port is COM2. If connected via A3/B3, the port is COM3.
Screenshot of the Logger1000 'Add Device' pop-up window for configuring an energy meter.
3.5 Enable Remote Control
Navigate to System > Remote maintenance. Enable the function and ensure the Remote Service Address is set to 'International Server'.
Screenshot of the Logger1000 'Remote Maintenance' settings, with 'Enable' toggled ON and 'Remote Service Address' set to 'International Server'.
Next, navigate to System > Transfer Configuration. Click the gearwheel icon ⚙️ to change the Server Domain. Ensure the domain address is api.isolarcloud.com.hk.
Screenshot of the Logger1000 'Transfer Configuration' settings, showing the 'Server Domain' set to 'api.isolarcloud.com.hk'.
3.6 Internet Connection
3.6.1 Connect via Ethernet Cable
Navigate to System > Port Parameter > Ethernet. Select ON for DHCP. The home router will assign an IP address to the Logger1000. Upon successful internet connection and iSolarCloud communication, the Ethernet port icon and the cloud icon ☁️ on the left column will be active.
Screenshot of the Logger1000 'Port Parameter' -> 'Ethernet' settings, with DHCP enabled.
Note: DHCP can be set to Dynamic, or a specific IP Address can be entered. Remember to save.
3.6.2 Connect via WiFi
Navigate to System > Port Parameter > WiFi. Turn on the WiFi switch, choose the network, and enter the password. Available WLAN Networks will be displayed upon successful connection. When connected to the internet and iSolarCloud, the WiFi icon ? and the cloud icon ☁️ on the left column will be active.
Screenshot of the Logger1000 'Port Parameter' -> 'WiFi' settings, showing available networks and connection status indicators.
3.7 Add CT Transformation Ratio
Navigate to Device Monitoring and select the meter DTSD1352. Click "Initial Parameter". If the ratio is 200/5, enter the value 40 in the CT Transformation Ratio field.
Screenshot of the Logger1000 'Device Monitoring' section, showing the 'Initial Parameter' settings for the DTSD1352 meter, including 'CT Transformation Ratio'.
3.8 Setup Export Control if required
Navigate to Power Control > Active Power. Set the parameters as shown. The Fixed Value of Active Power sets the power limit. Ensure 'Feed-in stop' is disabled.
Example: For a 50 kW inverter needing an export limit of 20 kW, set 'Fixed Value of Active Power' to 20.0 kW.
Screenshot of the Logger1000 'Power Control' -> 'Active Power' settings, illustrating export limit configuration with 'Feed-in stop' disabled and 'Fixed Value of Active Power' set.
4. Create Plant on iSolarCloud
The iSolarCloud portal is used for Logger1000 online monitoring. Create an iSolarCloud installer account if you do not have one. Use the iSolarCloud APP to create a plant and link it with the Logger1000.
Log in to your account and click the "Create Plant" option. Follow the path: Create Plant > Commercial > PV > Scan the QR Code of Logger1000.
Enter the customer's basic information to create the plant, which typically takes a few minutes.
For any questions, please contact Sungrow Service Department at 1800 786 476 or email service@sungrowpower.com.au.
