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User Guide: Integrating Sigenergy Solar, Battery, and EV Chargers with EMHASS for Home Assistant

This updated guide uses the comprehensive Sigenergy-Local-Modbus integration for Home Assistant, enabling local monitoring and control of Sigenergy systems. Below are setup instructions for solar PV, battery storage, DC/AC EV chargers, and EMHASS optimization.

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1. Integration Setup via Sigenergy-Local-Modbus

A. Installation (HACS)

1. Add the Integration Repository
   • In Home Assistant, go to HACS > Integrations.
   • Click ⋮ > Custom Repositories and add:

https://github.com/TypQxQ/Sigenergy-Local-Modbus

- Install the **Sigenergy ESS Integration**. 2. **Configure Modbus-TCP**
- Ensure your Sigenergy inverter has Modbus-TCP enabled (ask your installer).
- Assign a **static IP** to the Sigenergy device on your network. 3. **Auto-Discovery**
- Restart Home Assistant. The integration should auto-discover your Sigenergy system under **Settings > Devices \& Services > Discovered**.
- If not found, add it manually:
    - Go to **Add Integration > Sigenergy**.
    - Enter the device IP, port (default: `502`), and first Device ID (usually `1`).

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2. Solar PV Integration

A. Key Sensors The integration auto-creates these entities:

• PV Power: sensor.plant_pv_power
• PV Strings: sensor.inverter_pv_string_1_power, etc.

B. EMHASS Configuration

• In EMHASS’s config.json or web UI:

{
  "sensor_power_photovoltaics": "sensor.plant_pv_power",
  "sensor_power_load_no_var_loads": "sensor.plant_load_power"
}

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3. Battery Integration

A. Key Sensors

• Battery Power: sensor.inverter_battery_power (negative when charging)
• Battery SOC: sensor.inverter_battery_soc

B. EMHASS Configuration

• Enable battery optimization:

{
  "sensor_battery_power": "sensor.inverter_battery_power",
  "sensor_battery_soc": "sensor.inverter_battery_soc",
  "battery_capacity_kwh": 48  // Adjust for your system
}

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4. DC EV Bidirectional Charger (25kW V2X)

A. Home Assistant Setup

• The integration exposes:
  • Charger Power: sensor.dc_charger_power
  • Charger Status: sensor.dc_charger_status

B. EMHASS Configuration

• Treat the charger as a secondary battery:

{
  "sensor_ev_battery_power": "sensor.dc_charger_power",
  "sensor_ev_soc": "sensor.ev_soc"  // Requires EV SOC sensor
}

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5. AC EV Charger (7-22kW)

A. Home Assistant Setup

• Key entities:
  • Charger Power: sensor.ac_charger_power
  • Charger Mode: select.ac_charger_work_mode

B. EMHASS Configuration

• Add as a deferrable load:

{
  "deferrable_loads": {
    "ev_charger": {
      "entity_id": "switch.ac_charger_control",
      "max_power": 22000  // 22kW
    }
  }
}

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6. Automation Example

Optimize Charging Based on Solar Forecast

alias: "EV Charging Schedule"
trigger:
  - platform: time
    at: "04:00:00"  # Run after EMHASS optimization
action:
  - service: input_number.set_value
    target:
      entity_id: input_number.evac_charge_limit
    data:
      value: ""

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Troubleshooting

• Modbus Not Detected: Confirm Modbus-TCP is enabled on the Sigenergy device and the IP is static.
• Entity Mismatches: Verify sensor names in Developer Tools > States.
• Control Limitations: Enable write access in the integration’s configuration options.

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Summary Table: Key Entities

Component	Home Assistant Entity	EMHASS Parameter
Solar PV	sensor.plant_pv_power	sensor_power_photovoltaics
Battery	sensor.inverter_battery_power	sensor_battery_power
DC EV Charger	sensor.dc_charger_power	sensor_ev_battery_power
AC EV Charger	switch.ac_charger_control	deferrable_loads.ev_charger

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For advanced configurations, refer to the Sigenergy-Local-Modbus documentation. This integration provides the most reliable local control for optimizing Sigenergy systems with EMHASS.

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