Fronius - Modbus TCP

Installation

1. 1In the Fronius web UI, navigate to Communication, enable Modbus TCP, and set SunSpec Model Type to float. Save and reboot the Datamanager if prompted.
2. 2Note the inverter IP address on your LAN. Set a DHCP reservation so the address does not change.
3. 3In ModbusCloud, add a new device with protocol Modbus TCP, port 502, slave ID 1, and the inverter IP.
4. 4Import the Fronius Modbus TCP template. Readings appear within a few polling cycles.

Things to watch for

01

The inverter is online but ModbusCloud shows timeouts. What to check?

Verify that Modbus TCP is actually enabled in the Fronius Datamanager web UI. The inverter responds to ping even when Modbus is off. Also confirm the SunSpec Model Type is float and not int+SF for this template.

02

AC power reads zero at night. Is the template broken?

That is correct behaviour. Fronius inverters shut down when there is no PV production, so all AC values drop to zero or report as not valid. Lifetime energy stays accurate because the Datamanager retains it.

Registers (15)

15 read / 0 write

More Fronius templates

Fronius GEN24

Fronius

Modbus TCP

Monitors and controls Fronius GEN24 inverters and PV batteries via SunSpec Modbus TCP

0 registers762

Fronius - Modbus TCP Integer+SF

Fronius

Modbus TCP

Reads Fronius inverter data via Modbus TCP using SunSpec int+SF model

14 registers214

Fronius SnapInverter

Fronius

Modbus RTU

Controls a Fronius SnapInverter via Modbus RTU over RS-485.

0 registers160

More TCP templates

NIBE Nibe S-Series (SG Ready)

NIBE

Modbus TCP

5 registers1

Domekt R 400 V

Komfovent

Modbus TCP

Controls Komfovent Domekt recuperator ventilation via Modbus TCP

25 registers118

HUAWEI SUN2000 Inverter & LUNA2000 battery

Huawei

Modbus TCP

Monitors HUAWEI SUN2000 inverter, LUNA2000 battery, and Smart Power Sensor via Modbus TCP.

4 registers1248

Algodue Energy meter UEM80-2D E

Algodue Elettronica S.r.l.

Modbus TCP

Measures single-phase energy consumption and production via Modbus TCP.

12 registers46

Sigenergy SigenStore EC (grid)

Sigenergy

Modbus TCP

5 registers1

Siemens Junelight Smart Battery (battery)

Siemens

Modbus TCP

2 registers1