sigenergy2mqtt 2026.6.21

Publish Modbus data from Sigenergy to MQTT, with optional Home Assistant Auto-Discovery and PVOutput updating

sigenergy2mqtt is a bridge between the Modbus interface of the Sigenergy energy system and the MQTT lightweight publish/subscribe messaging protocol.

In addition, sigenergy2mqtt has several optional features:

1. It can auto-discover Sigenergy devices and their device IDs without having to specify the host IP address.
2. It can publish the appropriate messages to allow Home Assistant to automatically discover the Sigenergy devices, simplifying Home Assistant configuration.
3. Production and consumption data can automatically be uploaded to PVOutput.
4. It can directly publish the Modbus data to an InfluxDB (v1/2) time series database for long-term storage and analysis.

Pre-requisites

• Sigenergy ESS or PV Inverter, with Modbus-TCP enabled by your installer or through the mySigen app
• MQTT broker such as Mosquitto, either standalone or installed as an app to Home Assistant

Installation

Follow the installation guides for supported environments:

• Home Assistant
• Docker
• Linux

Configuration

When parsing configuration options, sigenergy2mqtt looks at the configuration sources in the following order:

1. Configuration File
2. Environment Variables
3. Command Line Options¹
4. Home Assistant App Configuration

This means, for example, that the options specified in the configuration file can be overridden by environment variables and command line options.

The combined reference for CLI flags, environment variables, and YAML configuration keys can be found here.

¹ _{Not applicable to the Home Assistant App}

MQTT Publish and Subscribe Topics

The topics that are published and subscribed to by sigenergy2mqtt can be found here.

Disclaimer

sigenergy2mqtt was developed for my own use, and as such has only been tested in my single-phase environment without AC or DC chargers, although I have developed a testing environment in software that emulates the chargers and three phase implementations. If you find a problem, please raise an issue.

Thanks

sigenergy2mqtt was inspired the Home Assistant integrations developed by TypQxQ.