Chint Energy Meters

Integration with Chint electricity meters via Modbus protocol.

Overview

This bundle provides OpenEMS integration for selected Chint electricity meters. The components communicate through the OpenEMS Modbus bridge and expose standard ElectricityMeter channels for power, voltage, current, frequency, and cumulative energy.

Supported Devices

Components

This bundle implements the following OpenEMS Components:

Chint DDSU666 Meter

Name: Meter Chint DDSU666

Factory-PID: Meter.Chint.DDSU666

Implemented Natures/Interfaces

  • MeterChintDdsu666

  • SinglePhaseMeter

  • ElectricityMeter

  • ModbusComponent

  • OpenemsComponent

  • ModbusSlave

Description: Single-phase electricity meter via Modbus. The device-specific communication address is exposed as a custom channel, while cumulative import energy is mapped to the standard OpenEMS energy channels.

Configuration:

  • id (String): Component ID for unique identification (default: "meter0")

  • alias (String): Human-readable alias for the component

  • enabled (Boolean): Enable/disable this component (default: true)

  • modbus_id (String): ID of Modbus bridge for communication (default: "modbus0")

  • modbusUnitId (Integer): Modbus Unit ID of the meter device (default: 1)

  • type (Enum): Meter type - GRID, PRODUCTION, or CONSUMPTION (default: GRID)

  • invert (Boolean): Invert power values and swap production/consumption energy (default: false)

  • phase (Enum): Which phase is measured - L1, L2, or L3 (default: L1)

Chint DTSU666 Meter

Name: Meter Chint DTSU666

Factory-PID: Meter.Chint.DTSU666

Implemented Natures/Interfaces

  • MeterChintDtsu666

  • ElectricityMeter

  • ModbusComponent

  • OpenemsComponent

  • ModbusSlave

Description: Three-phase, four-wire electricity meter via Modbus input registers. This implementation supports phaseRotation, maps the total import-energy register to standard OpenEMS cumulative energy channels, and exposes the total power factor as a device-specific channel.

Unlike the DDSU666 single-phase support in this bundle, DTSU666 uses FC4 / input registers for the verified live register map.

Configuration:

  • id (String): Component ID for unique identification (default: "meter0")

  • alias (String): Human-readable alias for the component

  • enabled (Boolean): Enable/disable this component (default: true)

  • modbus_id (String): ID of Modbus bridge for communication (default: "modbus0")

  • modbusUnitId (Integer): Modbus Unit ID of the meter device (default: 1)

  • type (Enum): Meter type - GRID, PRODUCTION, or CONSUMPTION (default: GRID)

  • invert (Boolean): Invert power values and swap production/consumption energy (default: false)

  • phaseRotation (Enum): Phase mapping for the three-phase meter (default: L1_L2_L3)

Configuration note: the OSGi attribute is named modbus_id, but in FileInstall/Felix .config files the property key is typically modbus.id.

Verified DTSU666 communication assumptions: * Use FC4 / input registers * Recommended serial bridge settings are 9600-N-8-2 * Total import energy is read from register 0x4000 * Total power factor is read from register 0x202A and exposed as an integer-style OpenEMS value with scale 1000 = 1.000

Scope note: DTSU666 is the supported three-phase, four-wire model in this bundle. The separate DSSU666 three-phase, three-wire variant is intentionally not included here.

Source Code