Introduction #
Fronius inverters can be connected to the Qilowatt system using a Modbus module. This guide explains the necessary settings, module installation, and startup steps.
Prerequisites #
• The inverter is operational and configured according to the manufacturer’s instructions
• A Modbus R1 or R2 module is available
• Required tools and a communication cable (CAT5 or CAT6)
• A Qilowatt account has been created and the app is ready for adding devices → Creating a user account
• A Modbus R1 or R2 module is available
• Required tools and a communication cable (CAT5 or CAT6)
• A Qilowatt account has been created and the app is ready for adding devices → Creating a user account
Step-by-step Guide #
Configuring the inverter in the Fronius web interface #
1. Open the Fronius web interface and go to the Modbus Data Export view.
2. Configure the following settings:
• Modbus RTU Interface 1: slave
• Baud Rate: 9600
• Parity: none
• SunSpec Model Type: int + PF
• Inverter Address: 3
• Inverter Control via Modbus: On
2. Configure the following settings:
• Modbus RTU Interface 1: slave
• Baud Rate: 9600
• Parity: none
• SunSpec Model Type: int + PF
• Inverter Address: 3
• Inverter Control via Modbus: On
Installing the module #
1. Install the MODBUS R1 / R2 module according to the installation manual.
2. Connect the communication cable (CAT5 or CAT6) between the module’s RS485 port and the inverter’s Modbus port:
• M1+ → A
• M1- → B
2. Connect the communication cable (CAT5 or CAT6) between the module’s RS485 port and the inverter’s Modbus port:
• M1+ → A
• M1- → B
Starting the module #
1. Switch on the circuit breaker of the MODBUS R1 / R2 module (or insert the fuse).
2. Check if the module’s white LED indicator starts flashing rapidly.
3. Connect the module to your home WiFi network → Connecting the device to WiFi.
• Place the module where the WiFi signal is strong.
• Use a WiFi range extender if necessary.
2. Check if the module’s white LED indicator starts flashing rapidly.
3. Connect the module to your home WiFi network → Connecting the device to WiFi.
• Place the module where the WiFi signal is strong.
• Use a WiFi range extender if necessary.
Result #
The Fronius inverter is successfully connected to the Qilowatt system. The Modbus module transmits data and enables device control and energy optimization.
If it Doesn’t Work #
• If the LED indicator does not light up, check the connections and circuit protection.
• If communication does not work, verify that the Modbus settings in the web interface are correct.
• If the module does not connect to WiFi, follow the guide → Resetting WiFi settings.
• If the issue persists, contact our team: support@qilowatt.eu.
• If communication does not work, verify that the Modbus settings in the web interface are correct.
• If the module does not connect to WiFi, follow the guide → Resetting WiFi settings.
• If the issue persists, contact our team: support@qilowatt.eu.
