ESPHome-based WiFi interface for Voltronic-style solar inverters, PIP inverters, EASUN, etc. , providing seamless integration with Home Assistant.

Just connect the board to the inverter's serial port with a standard RJ45 ethernet cable, provision the board and you are ready to go. Simple as that!

• Comprehensive Monitoring

  • Grid voltage, frequency, and power metrics
  • Solar (PV) voltage, current, and charging power
  • Battery voltage, charging/discharging current, and state
  • Inverter heat sink temperature and bus voltage
  • Output power, voltage, and load percentage
  • Complete fault and warning indicators
  • Single AND Dual MPPT compatible

• Remote Configuration

  • Battery charging parameters (bulk, float, recharge voltages)
  • Charging source priority (Utility/Solar/Both)
  • Output source priority
  • Maximum charging currents (AC and DC)
  • Dynamic log level control

• Easy Setup

  • ESP32 Improv WiFi provisioning via Bluetooth
  • Dashboard import for quick adoption
  • No hardcoded credentials required
  • Automatic AP fallback mode

• MCU: ESP32-S3
• Interface Board: MPPHA (custom PCB)
• Inverter: Voltronic-style solar inverters (PIP series, etc.)
• Connection: UART (GPIO6/GPIO7) at 2400 baud

If you want to purchase the electronics board contact me directly at [email protected]

1. Connect the MPPHA device to the serial port of the inverter with the supplied RJ45 cable
2. The inverter should power the board trough the RJ45 cable and a orange led should light up on the board
3. The second led should pulse slowly (aprox. once per second)

1. Power up the device - The ESP32 will create a WiFi access point named mppha-XXXXXX - Setup (password: setup1234) - Default IP 192.168.4.1
2. Connect via Bluetooth using ESP Improv in the Home Assistant ESPHome dashboard
3. Configure WiFi credentials through the provisioning interface
4. Device auto-discovers in Home Assistant

All configuration is done through Home Assistant after initial setup:

• Battery Settings: Configure voltage thresholds and charging parameters
• Priority Settings: Set charging and output source priorities
• Current Limits: Adjust maximum charging currents
• Log Level: Change logging verbosity for debugging

• Try the fallback AP mode (mppha_single-XXXXXX - Setup)
• Check WiFi credentials
• Ensure 2.4GHz WiFi is available (5GHz not supported)

• Wait 30 seconds for auto-discovery
• Restart Home Assistant
• Check ESPHome logs for connection errors

Contributions are welcome! Please:

1. Fork the repository
2. Create a feature branch
3. Test your changes thoroughly
4. Submit a pull request

This project is licensed under the MIT License - see the LICENSE file for details.

• ESPHome Community for the excellent framework
• Pipsolar component developers
• Home Assistant community

• 🐛 Report Issues
• 💬 Discussions
• 📖 ESPHome Documentation

See CHANGELOG.md for version history and updates.

Made with ❤️ for the ESPHome community

If you want to purchase the electronics board contact me directly at [email protected]