INSTALLATION MANUAL
INTEGRATION AND CONFIGURATION OF HUAWEI INVERTER WITH TRYDAN
Electric Installation
First, we must make sure that our Huawei SUN2000-5KTL-L1 inverter has been correctly installed and configured. In order to be able to take home consumption measurements we will need to connect one of the compatible meters provided by Huawei to our inverter. For this manual we will use the DDSU666-H meter.
Power Meter Installation (DDSU666-H)
The meter is responsible for calculating the household consumption and sending it to the inverter via RS485. For this communication to be established, the following connections must be made:
The diagram shows a power meter (DDSU666-H) connected to the electrical line (L-N) via a CT clamp. It also illustrates the RS485 communication wiring, with pins labeled 485B1, 485A1, 485B2, and 485A2. The table details these labels, their definitions (differential signal), and their connection points for single and cascaded SUN2000 units. A schematic shows the meter connected to a protection box, which is then connected to the SUN2000 inverter and a solar panel. The meter is powered by L and N.
| N. | Label | Definition | Single SUN2000 | Cascaded SUN2000 |
| 1 | 485B1 | RS485B, differential signal - from RS485 | Connects to SUN2000 units | Connects to SUN2000 units |
| 2 | 485A1 | RS485A, differential signal + from RS485 | They are used for connection to the RS485 signal ports of the battery and power meter. When both the battery and power meter are configured, they must be crimped to ports 485B2, | Used for connection to the RS485 signal ports of the battery and power meter. When configuring both the battery and power meter, they must be crimped to ports 485B2 and 485A2. |
| 3 | 485B2 | RS485B, differential signal - from RS485 | ||
| 4 | 485A2 | RS485A, differential signal + from RS485 |
A pinout diagram shows connections 1-8. Pins 3 and 4 are for L and N power. Pins 5 and 6 are labeled RS485B, and pins 7 and 8 are labeled RS485A.
To power the meter, we must connect the phase and neutral of the line we want to measure to pins 3 and 4, respectively. After that, we must establish RS485 communication by connecting pin 24 (A) and 25 (B) of the meter to pin 3 and 4 of the communications connector of the Huawei inverter respectively. The clamp should be connected according to the following scheme:
A schematic shows the energy meter connected to a protection box, which is then connected to a SUN2000 inverter and a solar panel. The meter is powered by L and N. The protection box has connections for the meter (pins 3, 4, 24, 25) and the inverter (COM, 485A2, 485B2).
Communications Configuration
This section will show step by step how to configure the Huawei inverter to communicate with Trydan and send the measurement data to Trydan.
Huawei Configuration SUN2000
Once the installation is done, we will be able to configure the communication of the Huawei inverter thanks to the Wi-Fi signal it generates. This configuration can be executed from a smartphone, so we will use as an example the configuration from the mobile app. To do this, we must download the SUN2000 app and install it on our device. As an example, we will use an Android device, and with the following link the download will start automatically: https://appgallery.cloud.huawei.com/appdl/C10279542. We can also scan this QR code:
After installation, when we start the app, we will accept the privacy policy and all the permissions required.
A series of app screenshots are shown. The first displays a connection record with an inverter (SDongleA-05, SUN2000-5KTL-L1). The user clicks 'Manual connection'. The next screen shows connection modes: 'WLAN', 'Bluetooth', 'USB data cable'. The user selects 'WLAN'.
The first thing it shows us is a scanner to configure our inverter. The QR code that can scan is located on the right side of the inverter but in this manual, we will configure the SUN2000 manually. Click on Manual connection and select the image of our inverter. In order to enter the configuration, we need to connect to the Wi-Fi that the SUN2000 generates. To do this, press change and we will be redirected to the Wi-Fi configuration where we will search for this network.
The app displays a Wi-Fi connection screen. The current WLAN is shown as 'SUN2000-TA2210008145'. The user needs to 'Switch' [Switch] to the correct network. A prompt appears: "The app cannot obtain the system permission. Tap the Switch button at the bottom to select a network." The setting method is to select the WLAN with an identifier (usually SUN2000).
Another screen shows a Wi-Fi connection confirmation: "The current Wi-Fi connection cannot access the Internet, do you want to switch to mobile data?". Options are 'Maintain' [Maintain] and 'Use mobile data' [Use mobile data].
By default, the network SSID will be SUN2000-(SERIAL NUMBER) and the password is Changeme. Once connected, some devices will show a warning that the network has no internet connection. We will have to press [Maintain] to maintain the connection and then we will press [Use mobile data] to continue inside the SUN 2000 app. We will be asked for a password for the Installer user, by default it should be 00000a. This will allow us to enter the Home screen.
The app home screen is shown, with options like 'Settings' [Settings], 'Alarm', 'Quick settings', 'Device monitoring', 'Maintenance' [Maintenance], 'Power adjustment'. The user clicks on 'Settings' [Settings].
Within Settings, the user navigates to 'Communication configuration' > 'Router connection settings'. This screen displays network details like 'Current WLAN', 'DHCP', 'IP address', 'Subnet mask', 'Gateway address', and DNS servers.
Once we get in the home screen click on Settings >> Communication settings >> Router connection settings. We can now see if the router to which it is connected is the same as Trydan or if it needs to be configured. If it is configured, we should note down the IP it occupies in our network for further configuration of Trydan.
Dongle parameter settings. Before exiting the Communication configuration settings, select the option Dongle parameter settings >> Modbus TCP, indicating the option [Enable without restrictions].
The navigation path is shown: Settings > Communication configuration > Dongle parameter settings > Modbus TCP. The Modbus TCP screen has an option to 'Enable (unrestricted)' [Enable (unrestricted)].
Power meter configuration
To configure the meter, go to Maintenance from the home screen. Click on Manage sub-device and add our DDSU666-H (single phase) meter. The inverter will start scanning the device and if the connections are correct, it will add it automatically.
A sequence of app screens: Home screen > Maintenance > Subdevice management > Power meter. The 'Subdevice management' screen lists 'Battery' and 'Power meter'. The 'Power meter' screen shows 'Power meter model' (DDSU666-H), 'Power meter address', and an 'Auto search' button.
If the measurements or the energy diagram shown is not logical, we must change the direction of the clamp or configure this direction in the meter options through this same app.
A final screenshot shows the 'Power meter' screen with details like 'Active power', 'Yield today', 'Monthly energy yield', 'Total yield'. Another screenshot shows the 'Device monitoring' screen with energy flow indicators.
Trydan Configuration
The result should be a diagram in which the photovoltaic power is always positive as well as that of the household. Only the total consumption should be negative if the house is consuming less than the PV system is generating.
Once the SUN2000 is configured, we open the V2C application where we can access our e-Charger.
A series of app screenshots for the V2C app. It shows the 'e-Chargers' list, then a specific charger's details (e.g., 32 AMPERE, VEHICLE CONNECTED). The user clicks the configuration icon.
The configuration screen shows sections like 'DYNAMIC POWER CONTROL', 'OCPP', 'PAYMENT SYSTEM', 'WIFI CONFIGURATION', 'UPDATE FIRMWARE'. The user enters the 'DYNAMIC POWER CONTROL' section.
Within 'DYNAMIC POWER CONTROL', the user selects 'Huawei' as the slave type and enters the IP address (e.g., 192.168.68.131). They also select the 'Type of installation' (Monophasic/Triphasic, Installation with photovoltaic) and the charger type (Type 1).
Enter the desired e-Charger and click on the configuration icon at the top right. Enter the DYNAMIC POWER CONTROL section and choose Huawei as the slave type and enter the IP address we specified earlier (e.g. 192.168.1.229). After choosing whether our network is single-phase or three-phase and whether it includes photovoltaic installation, we will save the configuration. Trydan will save the configuration and restart to apply these changes.
Final result
When Trydan finishes its startup, it will connect to Huawei and obtain the measurements via Modbus TCP to vary the load intensity dynamically depending on the mode we have chosen. In the Trydan screen we will be able to see the measurements obtained:
Two screens are shown: one displaying "WAITING EV ERROR communication" and another showing "WAITING EV T:8.3 FU:0.9".
Trydan will display an error message if it fails to connect to Huawei, check your connection and make sure that the two devices are connected to the same network. If the connection is correct, it will show the measurements.
Problems after Huawei inverter update
Due to the recent update that Huawei has released to the SUN2000 family inverters, the communication protocol used by Trydan has been disabled. After contacting Huawei to solve this problem, they indicate that the only way to re-establish communication is by connecting an SDongleA to our inverter.
This device is an upgraded Wi-Fi adapter manufactured by this brand. Below, we describe the process of installing and upgrading this device to be able to establish communication with Trydan again.
Physical connection of SDongleA al to the inverter
The diagram shows the inverter's USB port, the SDongleA device being inserted, and an LED indicator on the dongle. A torque specification (0.8-1.1 N m) is also shown.
Connect the dongle to the USB port of our inverter as shown in the pictures. After that, the Dongle will start the boot protocol and the LED will start blinking red. When finished, the blinking will be green and it will generate a Wi-Fi access point for 3 minutes.
We must connect to this access point, which will have a name similar to "SDongleA-XXXX...". To do this, open the SUN2000 application. Click on Manual Connection and select SDongleA. Click on Change in Current WLAN and connect to the SDongleA WiFi with the password Changeme.
A sequence of app screenshots: Connection record screen, Manual connection screen, Select connection mode screen (WLAN selected), Wi-Fi selection screen showing available networks including 'SUN2000-TA2210008145' and others.
Once done, click on connect and the authentication screen will appear. We identify ourselves as Installer with the password 00000a.
The app shows the 'Settings' [Settings] menu, then 'Maintenance' [Maintenance]. Within 'Maintenance', the user selects 'Upgrade Disp.' [Upgrade Disp.]. The screen shows the current dongle version and an 'Upgrade' [Upgrade] button.
Firmware Upgrade Process
A sequence of app screens: Wi-Fi selection screen, SDongle settings screen (with 'Maintenance' [Maintenance] and 'Settings' [Settings] options), Maintenance screen, Upgrade device screen showing current version and an 'Upgrade' [Upgrade] button.
It will allow us to update the equipment to be the correct version by uploading it from our smartphone. Click on Manual Selection and look for this file which can be downloaded from the following link: https://drive.google.com/file/d/1mqxrzA3c_7eEkTUueztCHdiApzA6vv51/view?usp=sharing
App screenshots showing the 'Select upgrade package' screen, a 'Downloads' folder with various files, and the selection of the firmware file (e.g., SDongle_V100R001C00SPC127_package.zip).
Click on Dongle Update and wait for the process to finish following the instructions on the screen. This process should not modify the Wi-Fi configuration of the inverter, but it is advisable to check it later by entering the inverter configuration. Once this process is done, the communication between the inverter and Trydan will be re-established.
Display RS485_1 Dongle communication channel
We must consult the communication channel used by the Huawei inverter to then be incorporated into the Dynamic Power Control settings. Currently there are 3 communication channels (0, 1, 2).
To do this, click on Communication Settings >> RS485_1 >> Comm Address.
A sequence of app screens: Settings menu, Communication configuration menu, RS485_1 screen showing 'Baud rate', 'Protocol type' (MODBUS), and 'Com address' (set to 2).
