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Modbus TCP/IP Integration with Qvantum Heat Pumps

How to use Modbus to integrate your heat pump with a HEMS, BMS, or smart home system

Modbus TCP/IP integration

Qvantum heat pumps support Modbus TCP/IP communication, allowing integration with home energy management systems (HEMS), building management systems (BMS), and advanced smart home setups.

What Modbus enables

  • Read live operational data (temperatures, power consumption, status)
  • Send control signals (setpoint changes, mode switching, on/off)
  • Integrate with solar inverters or battery systems for self-consumption optimisation
  • Connect to third-party platforms (Home Assistant, KNX, Loxone, etc.)

Getting started

To use Modbus integration:

  1. Ensure your heat pump is connected to your local network (Wi-Fi or Ethernet).
  2. Note the IP address of the heat pump (visible in the app under Settings → Network or in your router's device list).
  3. Modbus TCP/IP uses port 502 by default.
  4. Request the Modbus register map from Qvantum support — this document lists all available registers, their addresses, data types, and read/write permissions.

Requesting the Modbus register map

The register map is available for certified installers and technical users. Contact support with your model and serial number to request it.

Email: support@qvantum.com
Subject: Modbus register map request – [model] [serial number]

Cloud API

Qvantum is also developing a Cloud API for remote integration. This will allow external systems to read and control the heat pump over the internet without requiring local network access. Contact support for the current status of the API programme.