Sungrow CX Series Inverters Commissioning Guide

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.

Introduction

The CX series inverters range does not have a screen and needs to be configured using the iSolarCloud App. This document explains the steps of commissioning the inverter (30kW, 50kW and 110kW range) and mentions how to set other major parameters using the local access function of the iSolarCloud App.

Step 1: Local Login

Login to the inverter locally by clicking “Local Access” under “More” or on the bottom right of the home page and select the “Bluetooth” connection option.

Figure 1: Local Access Login screen showing fields for Account, Password, and buttons for Login, Register, Visitor Login, and Local Access via Bluetooth.

A list of nearby inverters will appear. Simply select the SN of the inverter you wish to commission. Once selected and connected, the SN will be visible on the top right with a tick next to it. You can then proceed to login as the “admin”. Please contact Sungrow Service Department for the password.

Figure 2: Bluetooth Login screen showing Account, Password fields, and a Login button.

Step 2: Initial Configuration

Once logged in via Bluetooth for the first time, the “Initial Protection Parameter” option will appear. Here, the country can be set to “Australia”. Selecting Australia will set the protection parameters according to the AS/NZS 4777 standard.

Figure 3: Initial Configuration screen displaying 'Initial Protection Parameter' with a dropdown for Country (Region) selection, showing options like United States, Australia, and various Australian grid regions. An arrow indicates selection of 'Australia'.

*Please note that the specific grid settings are currently unavailable.

After selecting the country, press “Boot” to finalise the initial protection parameter. Once booted, the app will redirect to the homepage of local login where the inverter's performance can be viewed. All the other settings can be configured under the "More" tab.

Figure 4: Home Page showing inverter status, power graph, and yield data (Today Yield, Total Yield).

Step 3: Date and Time Settings

Date and Time can be configured under “System Parameters”.

Figure 5: Date and Time settings screen, showing navigation within the app's settings menu. It highlights 'System Parameters' and then 'Date Setting' and 'Time Setting' fields.

Step 4: Protection Parameters

To set the relevant grid protection parameters (Value and trip time for under/over voltage and frequency), click on “Protection Parameters”.

Figure 6: Protection Parameters screen, showing navigation options within the app's settings menu, including '10-min Overvoltage Protection', 'Grid Unbalance Protection', 'LVRT Parameters', etc.

Please refer to the following images for the relevant protection parameters.

Figure 7: Grid Code table listing Grid company Codes (AG, EE, EG, PN, PC, WP) and their corresponding regions and companies (e.g., AusGrid, NSW; Ergon Energy, QLD).

Please refer to the relevant DNSP for the upto date standards.

Figure 8: Grid Parameters table detailing protection settings for Over-voltage, Under-voltage, Over-frequency, and Under-frequency. It includes parameters like Vmax, Vmin, Fmax, Fmin, and their corresponding trip times (Time (s)) for different grid codes (AG, EE, EG, PN, PC, WP).

Step 5: Volt-Var and Volt-Watt Settings

Volt-Var Settings

Click "More" > "Settings" > "System Parameters" > Country (Australia). Then go back to the Setting menu and select "Power Regulation Parameters" > "Reactive Power Regulation" (For example QU) > to input the voltage and reactive power ratio as per the requirement.

Figure 9: Volt-var settings screen. It shows navigation through 'More' > 'Settings' > 'System Parameters' > 'Power Regulation Parameters' > 'Reactive Power Regulation (Q(U))'. It displays voltage points (QU_V1, QU_V2, etc.) and corresponding reactive power settings (QU_Q1, QU_Q2, etc.) in percentage.

Enable the “Reactive Power Regulation Mode” to “QU” and set the reactive power value. It is only possible to enter the value in % Vars in Sungrow inverter. You get the Volt-Var settings value from the DNSP Protection settings calculator, please follow the steps below on how to enter those values on Sungrow inverters.

Reference point	Set Points	Setting Range
QU_V1 = V1 44% leading	QU_V1 QU_Q1	207.0 V -44%
QU_V2 = V2	QU_V2 QU_Q2	220.0 V 0%
QU_V3 = V3	QU_V3 QU_Q3	250.0 V 0%
QU_V4 = V4 44% lagging	QU_V4 QU_Q4	265.0 V 44%

Volt-watt Settings

Click "More" > "Settings" > "System Parameters" > Country (Australia). Then go back to the Setting menu and select "Power Regulation Parameters" > "Power Regulation at Grid Overvoltage" > to input the Voltage and active power ratio as per the requirement.

Figure 10: Volt-watt settings screen. It shows navigation through 'More' > 'Settings' > 'System Parameters' > 'Power Regulation Parameters' > 'Power Regulation at Grid Overvoltage'. It displays voltage points (OPU_V1, OPU_V2, etc.) and corresponding active power settings (OPU_P1, OPU_P2, etc.) in percentage.

For Volt-watt settings, it is only possible to enter the value in % Vars in Sungrow inverter. You get the Volt-Var settings value from the DNSP Protection settings calculator, please follow the steps below on how to enter those values on Sungrow inverters.

Reference point	Set Points	Setting Range
OPU_V1 = V1 100%	OPU_V1 OPU_P1	207 V 100%
OPU_V2 = V2 100%	OPU_V2 OPU_P2	220 V 100%
OPU_V3 = V3 100%	OPU_V3 OPU_P3	253 V 100%
OPU_V4 = V4 44% lagging	OPU_V4 OPU_P4	259 V 44%

Step 6: 10-Min Overvoltage Setting

The 10-min over-voltage setting can be adjusted under “Protection Parameter".

Figure 11: 10-Min Overvoltage Protection screen, showing navigation within the 'Protection Parameters' menu where '10-min Overvoltage Protection' can be adjusted.

Step 7: Enable RS485 Port for Inverter via iSolarCloud App

Click "More" > "Settings" > “Operation Parameters” > “Other Parameters" > Enable” transparent transmission via standby RS485 port.

Screenshots showing navigation: 'More' > 'Settings' > 'Operation Parameters' > 'Other Parameters'. The final screenshot highlights the 'Transparent Transmission Via Standby RS485 Port' option.

Contact Information

If you have any questions, please contact Sungrow Service Department on 1800 786 476 or email to service@sungrowpower.com.au.

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