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Fronius Primo 4 Modbus Register Map

The Fronius Primo 4 is a solar inverter used for PV production monitoring, inverter diagnostics, and energy analytics. This page provides a sample Modbus register map with addresses, data types, and signal categories to help engineers commission, troubleshoot, and monitor the device. For Fronius Primo 4 deployments, teams often use this map to surface power, voltage, and current data in solar inverter monitoring and renewable energy systems.

This page shows a preview subset of the full device map available in Modbus Monitor XPF.

Engineers searching for Fronius Primo 4 Modbus map, Fronius Primo 4 register map, or Fronius Primo 4 Modbus registers can use this page as a compatibility snapshot before importing the full map into Modbus Monitor XPF. Also aligns to search intent around Fronius Primo 4 Modbus registers, Fronius Primo 4 Modbus TCP.

Overview

  • Device: Fronius Primo 4
  • Type: Solar Inverter
  • Protocol: Modbus RTU / Modbus TCP
  • Use case: PV production monitoring, inverter diagnostics, and energy analytics
  • Works with: Modbus Monitor XPF (import directly)

Download Modbus Map

The full Fronius Primo 4 Modbus register map is available inside Modbus Monitor XPF as a pre-built device map. Download the free feature-locked version to access and export the complete map.

Register Table (Sample)

Sample registers from the Fronius Primo 4 Modbus map. Import the full map in Modbus Monitor XPF to access all registers.

Signal Address Type Units Category
Phase Voltage AB V 440077 FLOAT32 V Voltage
AC Current A 440069 FLOAT32 - Current
AC Power W 440089 FLOAT32 kW Power
AC Energy Wh 440099 FLOAT32 kWh Energy
Line Frequency Hz 440091 FLOAT32 Hz Frequency
Enumerated value Operating state 440115 UINT16 - Status
Cabinet Temperature C 440107 FLOAT32 degC Temperature
Bitmask value Event fields 440117 UINT32 - General
Phase A Current A 440071 FLOAT32 - Current
Phase B Current A 440073 FLOAT32 - Current
Phase C Current A 440075 FLOAT32 - Current
Phase Voltage BC V 440079 FLOAT32 V Voltage

How to Use This Map

  1. Download Modbus Monitor XPF — Get the free version.
  2. Select the Fronius Primo 4 device map — pre-built maps are bundled and ready to load.
  3. Connect to your device — enter the device IP or COM port and start polling registers immediately.
  4. Visualise and log — build dashboards, trend data, and export readings without manual register entry.

Why Use Pre-Built Maps

  • Saves time — no need to manually look up or enter register addresses
  • Reduces errors — pre-validated maps eliminate mis-typed addresses and wrong data types
  • Speeds commissioning — connect and poll within minutes instead of hours
  • Reusable across projects — use the same map across multiple sites and installations

Data Categories Available

  • Power
  • Voltage
  • Current
  • Energy
  • Status
  • Temperature