fronius – Qilowatt https://docs.qilowatt.eu/en/ Thu, 30 Oct 2025 10:03:46 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://docs.qilowatt.eu/wp-content/uploads/2025/08/cropped-cropped-527027273_25002846699317774_491633004174988328_n-32x32.webp fronius – Qilowatt https://docs.qilowatt.eu/en/ 32 32 Fronius https://docs.qilowatt.eu/en/docs/fronius/ Thu, 28 Aug 2025 17:38:03 +0000 https://docs.qilowatt.eu/docs/fronius/ 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

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

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

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.

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.

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