Growatt THOR EV Charger

Share your Projects! Custom Integrations
1

Hi all,
this is my first post here. I’m using HA for about a year now. Coming from Domoticz but I find HA more versatile.
I was struggling to get my EV Charger working with HA so I decided to make my own integration for it. I like to share it with you. Please try and report your findings!

Link to Github repo

:zap: Unofficial Home Assistant integration for the Growatt THOR EV charger

This integration allows you to connect a Growatt THOR EV charger directly to Home Assistant using OCPP 1.6 over WebSocket, providing local control without relying on the Growatt cloud.

Tested on:
THOR 22AS with FW version 2.2.16-20240902 (but it should be working on all THOR 11/22AS-S/P/SE/PE versions.)

Features

:bar_chart: Real-time Monitoring

  • Charger status: Idle, Preparing, Charging, Finishing, Faulted, Unavailable
  • Power monitoring: Total power and per-phase (L1, L2, L3) in Watts
  • Current monitoring: Current draw per phase in Amperes
  • Voltage monitoring: Voltage per phase
  • Energy tracking: Session energy in kWh with automatic reset per session
  • Temperature: Internal charger temperature in °C
  • Transaction tracking: Active transaction ID and charging session details (saved in sensor.growatt_thor_ev_charger_last_sessions)
  • Energy Dashboard compatible charging sensors

:electric_plug: Grid & Load Balancing

  • External meter monitoring: Real-time grid power, voltage, and current per phase
  • Dynamic load balancing: Set maximum grid import limit (kW) to prevent overload
  • Smart polling: Configurable polling interval (5-3600 sec. recommended setting 30 seconds)
    • :warning: Note: Polling interval only affects the frequency of grid data display updates in Home Assistant. Load balancing functionality itself operates independently and responds in real-time regardless of the polling setting.
  • Wiring detection: Automatic 1-phase or 3-phase detection

:gear: Configuration & Control

  • Max current control: Set maximum charging current (6-32A)
  • Charging schedule: Configure automatic start/stop times
  • Charger modes: Switch between Plug & Charge, RFID only, HomeAssistant(HA)/RFID mode
  • Manual charging control: Start and stop charging sessions via buttons
  • Load balancing toggle: Enable/disable dynamic load balancing
  • Auto update THOR time: Auto sync time with server time at every heartbeat and with reboot (ocpp protocol)
  • AP Mode Activation: Added ability to enable AP (Access Point) mode directly from Home Assistant via integration configuration menu
    • Accessible through Settings → Devices & Services → Growatt THOR → Configure
    • Includes safety confirmation dialog to prevent accidental activation
    • Uses OCPP DataTransfer with messageId=“appconfigmode” (discovered via PCAP analysis)
    • THOR broadcasts WiFi network (typically serialno based SSID) for direct configuration when activated

:chart_with_upwards_trend: Session History

  • Last 5 sessions: Energy (kWh), cost, charge mode, work mode, timestamps
  • Current session tracking: Real-time updates during active charging

Link to Github repo

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Any links to your hard work? Any description and hints that may make it attractive for me to install it, or does it happen silently and automagically?

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I was locked out after my first post :grimacing: I modified my first post…thx!