---
title: "Fronius Smart Meter 63A"
description: "Real and apparent energy, power, voltage and current of the Fronius Smart Meter 63A via Modbus TCP through a Fronius inverter (unit ID 240 or 200)."
url: "https://taphome.com/en/compatibility/fronius-smart-meter-63a/"
language: en
lastmod: 2026-11-10
generator: hugo
ai:
  topics: ["modbus-tcp","electric-meter","sunspec","3-phase","rs485","energy-metering","solar-pv"]
  questions: ["How to integrate the Fronius Smart Meter 63A with TapHome?","What does the Fronius Smart Meter 63A TapHome template measure?","How to connect the Fronius Smart Meter 63A via Modbus TCP to TapHome?","Which Modbus unit ID does the Fronius Smart Meter 63A use behind a Datamanager or GEN24 inverter?","How to enable Modbus TCP and SunSpec float on a Fronius Datamanager or GEN24?","Why does TapHome read inverter values instead of meter values with Slave ID 1?"]
---

# Fronius Smart Meter 63A

Communication: Modbus TCP

> Network address
> 
> TapHome reaches this device at the address entered on import. Give the device a fixed address — an IP reservation in the router, or its mDNS name if it supports one — otherwise the integration stops working when the router changes the address.
> 
> [Network Preparation](https://taphome.com/en/docs/setup/network-preparation/)

## Integration guide

The Fronius Smart Meter 63A is a bidirectional three-phase electricity meter (DIN rail, 4 modules, maximum current 63 A) for Fronius PV systems. The meter itself has no network connection: it talks Modbus RTU over a 3-wire RS-485 line to a Fronius inverter — a SnapINverter with Fronius Datamanager 2.0, or a Fronius GEN24 — and the inverter makes the meter data available over Modbus TCP as SunSpec meter models. TapHome connects to the IP address of the inverter / Datamanager on port 502, not to the meter.

This community template reads the SunSpec float meter model 213 (wye-connected three-phase) with function 0x03 and 32-bit float registers. It creates two electricity meters — real energy and apparent energy, each with import and export counters — and adds phase currents, voltages, grid frequency, reactive power and power factor as module service attributes. For the Fronius Smart Meter TS, the official [Fronius Smart Meter](https://taphome.com/en/compatibility/fronius-smart-meter/) template is available.

## Hardware connection

The data outputs of the meter are terminals **A**, **B** and **C** (RS-485, electrically isolated from the measuring input). Fronius requires the following for the data cable:

- Cable of type CAT5 or higher, shielded twisted pair recommended
- A twisted pair for the data lines that belong together (D+/D- or M1+/M1-)
- Maximum cable length between the inverter and the meter: **300 m**
- Near mains wiring, wires rated 300–600 V (never less than the operating voltage); double-insulated or sheathed cables near bare conductors

### Wiring to a Fronius SnapINverter (Datamanager 2.0)

![Fronius Smart Meter 63A-3 RS-485 terminals A, B, C connected to the D+, D- and minus terminals of a Fronius SnapINverter, with a 120 ohm terminating resistor](https://taphome.com/images/compatibility/fronius-smart-meter-63a/wiring-rs485-snapinverter_hu_28ded130e72c1d1b.jpg)

| Smart Meter | SnapINverter (system monitoring) |
|---|---|
| A | D+ |
| B | D- |
| C | - |

### Wiring to a Fronius GEN24 inverter

![Fronius Smart Meter 63A-3 RS-485 terminals A, B, C connected to the M1+, M1- and GND terminals of a Fronius GEN24 inverter, with a 120 ohm terminating resistor](https://taphome.com/images/compatibility/fronius-smart-meter-63a/wiring-rs485-gen24_hu_1231571e1a25e8cd.jpg)

| Smart Meter | GEN24 Modbus terminal |
|---|---|
| A | M1+ |
| B | M1- |
| C | GND |

On the GEN24 the inputs M0 and M1 can be chosen freely; up to 4 Modbus participants can be connected to the Modbus terminal.

> [!WARNING]
> Fronius recommends terminating resistors to avoid interference. The **120 Ω** terminating resistor supplied with the Smart Meter is installed on the meter between **A** and **B**. In a multi-meter system, place the terminating resistors individually for each channel.

### Network connection

The Fronius inverter (SnapINverter with Datamanager 2.0, or GEN24) must be in the same local network as the TapHome Control Unit. Fronius recommends a wired network for a stable data connection. The IP address of the inverter / Datamanager is entered when the template is imported, so a fixed IP address or a DHCP reservation in the router is recommended.

```
[Smart Meter 63A] --RS-485 / Modbus RTU--> [SnapINverter + Datamanager 2.0 / GEN24] --Modbus TCP, port 502--> [TapHome]
```

> [!WARNING]
> Modbus TCP is an unsecured interface. Fronius advises operating the inverter in a private, secured network and never making it reachable from the internet via port forwarding.

## Configuration

### Setting the meter address

With a single Smart Meter in the system, the meter keeps address **1** (the primary meter always has address 1). In a multi-meter system each meter needs its own address; the other meters are numbered consecutively from 2 to 14.

![Setting the Modbus address on the Fronius Smart Meter display: code 2633 entry with the Prog and Page buttons, then the Addr menu with permissible values 1 to 14](https://taphome.com/images/compatibility/fronius-smart-meter-63a/meter-address-setting_hu_4ab3f2d7eecf2666.jpg)

1. Press **Prog** and **Page** at the same time to enter the code.
2. Enter the password **2633** — **Prog** increases the digit, **Page** moves to the next digit.
3. Press **Prog** and **Page** at the same time again to open the menu item **Addr**.
4. Set the address (permissible values 1–14).

### Registering the meter in the inverter

The meter must be configured as the primary meter in the inverter before its data are available:

- **SnapINverter / Datamanager 2.0** — open the Datamanager web page, **Settings**, log in as user **service** with the service password, open **Meter**, select the primary meter, click **Settings**, set the position (feed-in point or consumption point), confirm with **Ok** once the status shows OK, and save.
- **GEN24** — open the inverter web page, **Device configuration**, log in as user **Technician**, open **Components**, click **Add component**, set the position (feed-in point or consumption point), click **Add** and **Save**.

Secondary meters are added the same way with the address set on the meter in the **Modbus address** field.

### Enabling Modbus TCP on the Fronius Datamanager

1. Open the Datamanager web interface in a browser (IP address from System Information, or host name)
2. Open **Settings** > **Modbus**
3. Set **Data output via Modbus** to **tcp**
4. Keep **Modbus port** at **502**
5. Set **SunSpec Model Type** to **float** (meter models 211/212/213 — required by the template; int+SF shifts all register addresses)
6. Save the settings

On the Datamanager 2.0, data output via Modbus is set to **rtu** at the factory. When a Smart Meter is configured under Settings / Meter, the rtu setting cannot be used — select **tcp**.

### Enabling Modbus TCP on a Fronius GEN24

1. Open the inverter web interface
2. Open **Communication** > **Modbus**
3. Enable the **TCP Server**
4. Set **SunSpec Model Type** to **float**
5. Set **Modbus port** to **502** (the GEN24 also offers 1502; the template uses 502)
6. Note the **Meter address** — the unit ID of the meter, factory setting **200**

### Modbus unit ID of the meter

The inverter is a Modbus TCP gateway: the unit ID selects which device behind it answers. The meter is reached under a fixed unit ID on the Datamanager and under a configurable one on the GEN24:

| Smart Meter address | Unit ID via Datamanager | Unit ID via GEN24 (default) |
|---|---|---|
| 1 | **240** | **200** |
| 2 | 241 | 201 |
| 3 | 242 | 202 |
| 4 | 243 | 203 |
| 5 | 244 | 204 |

> [!WARNING]
> The template's import parameter **Slave ID** (*Modbus egységazonosító*) defaults to **1**. Unit ID 1 addresses the inverter, not the meter (inverter number 01 on the Datamanager; on the GEN24 the inverter's unit ID is always 1). When importing, set the Slave ID to **240** behind a Datamanager or **200** behind a GEN24 (or the meter address configured on the GEN24).

In TapHome, import the template and enter the inverter / Datamanager IP address (*IP-cím*, default 192.168.1.100) and the meter's unit ID when prompted.

## Device capabilities

All values are read from holding registers as 32-bit floats; the module and both devices poll every 15 seconds.

### Real energy (import/export) — appears as *Valós energia (import/export)*

An electricity meter for active energy and power:

- **Total consumption** — total imported real energy, register H:40137 divided by 1000 (Wh → kWh)
- **Demand** — reads the total real power register H:40097 (W)

Service attributes of the device:

| Attribute | Appears as | Register |
|---|---|---|
| Total exported real energy (kWh) | *Exportált valós energia összesen* | H:40129 / 1000 |
| Real power phase A / B / C (W) | *Valós teljesítmény A / B / C fázis* | H:40099, H:40101, H:40103 |
| Imported real energy phase A / B / C (kWh) | *Importált valós energia A / B / C fázis* | H:40139, H:40141, H:40143 / 1000 |
| Exported real energy phase A / B / C (kWh) | *Exportált valós energia A / B / C fázis* | H:40131, H:40133, H:40135 / 1000 |

> [!TIP]
> The sign of the total real power and the meaning of the two energy counters depend on the meter position set in the inverter. With the meter at the feed-in point (grid), positive power means consumption from the grid and negative power means feed-in; the import counter is energy taken from the grid and the export counter is energy fed into the grid. At the consumption point, normal consumption is reported as negative power.

### Apparent energy (import/export) — appears as *Látszólagos energia (import/export)*

An electricity meter for apparent energy and power:

- **Total consumption** — total imported apparent energy, register H:40153 divided by 1000 (VAh → kVAh)
- **Demand** — reads the total apparent power register H:40105 (VA)

Service attributes of the device:

| Attribute | Appears as | Register |
|---|---|---|
| Total exported apparent energy (kVAh) | *Exportált látszólagos energia összesen* | H:40145 / 1000 |
| Apparent power phase A / B / C (VA) | *Látszólagos teljesítmény A / B / C fázis* | H:40107, H:40109, H:40111 |
| Imported apparent energy phase A / B / C (kVAh) | *Importált látszólagos energia A / B / C fázis* | H:40155, H:40157, H:40159 / 1000 |
| Exported apparent energy phase A / B / C (kVAh) | *Exportált látszólagos energia A / B / C fázis* | H:40147, H:40149, H:40151 / 1000 |

### Module service attributes

The module shows meter identification from the SunSpec common block and the instantaneous grid values:

| Attribute | Appears as | Register |
|---|---|---|
| Manufacturer | *Gyártó* | H:40004 (text) |
| Device model | *Készülékmodell* | H:40020 (text) |
| Software version | *Szoftververzió* | H:40044 (text) |
| Serial number | *Sorozatszám* | H:40052 (text) |
| Total current (A) | *Összesített áramerősség* | H:40071 |
| Current phase A / B / C (A) | *Áramerősség A / B / C fázis* | H:40073, H:40075, H:40077 |
| Voltage L-N average (V) | *Feszültség L-N (átlag)* | H:40079 |
| Voltage AN / BN / CN (V) | *Feszültség AN / BN / CN (A / B / C fázis)* | H:40081, H:40083, H:40085 |
| Voltage L-L average (V) | *Feszültség L-L (átlag)* | H:40087 |
| Voltage AB / BC / CA (V) | *Feszültség AB / BC / CA* | H:40089, H:40091, H:40093 |
| Grid frequency (Hz) | *Hálózati frekvencia* | H:40095 |
| Total reactive power (var) | *Meddőteljesítmény összesen* | H:40113 |
| Reactive power phase A / B / C (var) | *Meddőteljesítmény A / B / C fázis* | H:40115, H:40117, H:40119 |
| Total power factor | *Teljesítménytényező összesen* | H:40121 |
| Power factor phase A / B / C | *Teljesítménytényező A / B / C fázis* | H:40123, H:40125, H:40127 |

## Troubleshooting

### No communication

1. Check that Modbus TCP is enabled — Datamanager: **Settings** > **Modbus** > **tcp**; GEN24: **Communication** > **Modbus** > **TCP Server**
2. Check that TapHome uses the IP address of the inverter / Datamanager, not of the meter
3. Check the port — the template uses **502**; a GEN24 can be set to 1502
4. Check that the meter is registered as the primary meter in the inverter (Datamanager **Meter** page shows status OK, or the meter is listed under GEN24 **Components**)
5. Check the RS-485 wiring (A→D+, B→D-, C→- on the SnapINverter; A→M1+, B→M1-, C→GND on the GEN24) and the 120 Ω terminating resistor

### Values belong to the inverter or registers are wrong

- With Slave ID **1** TapHome talks to the inverter, not to the meter — set **240** (Datamanager) or **200** (GEN24, or the configured meter address)
- **SunSpec Model Type** must be **float**; with int+SF the meter models 201/202/203 are used and all register addresses shift
- On an installation that is not three-phase, the phase B and C registers can return invalid (NaN) values

### Slow responses or timeouts

Fronius recommends executing Modbus queries sequentially, not in parallel (GEN24: at most 2 in parallel), and reading several registers in one request. For the Datamanager, Fronius recommends a response timeout of at least 10 seconds (GEN24: at least 1 second), and longer with more devices in the Fronius Solar Net ring; the template suggests a read/write timeout of 1000 ms. Avoid other Modbus TCP clients polling the inverter at the same time.

## Available devices 2

These devices appear in TapHome after import.

Fronius Smart Meter 63A Module

Service Attributes

|                              |
|------------------------------|
| Gyártó                       |
| Készülékmodell               |
| Szoftververzió               |
| Sorozatszám                  |
| Összesített áramerősség      |
| Áramerősség A fázis          |
| Áramerősség B fázis          |
| Áramerősség C fázis          |
| Feszültség L-N (átlag)       |
| Feszültség AN (A fázis)      |
| Feszültség BN (B fázis)      |
| Feszültség CN (C fázis)      |
| Feszültség L-L (átlag)       |
| Feszültség AB                |
| Feszültség BC                |
| Feszültség CA                |
| Hálózati frekvencia          |
| Meddőteljesítmény összesen   |
| Meddőteljesítmény A fázis    |
| Meddőteljesítmény B fázis    |
| Meddőteljesítmény C fázis    |
| Teljesítménytényező összesen |
| Teljesítménytényező A fázis  |
| Teljesítménytényező B fázis  |
| Teljesítménytényező C fázis  |

Service Attributes

Gyártó

```taphome
modbusr(H, 40004, String, 32)
```

Készülékmodell

```taphome
modbusr(H, 40020, String, 32)
```

Szoftververzió

```taphome
modbusr(H, 40044, String, 16)
```

Sorozatszám

```taphome
modbusr(H, 40052, String, 32)
```

Összesített áramerősség

```taphome
ROUND(MODBUSR(H, 40071, Float), 2) + " A"
```

Áramerősség A fázis

```taphome
ROUND(MODBUSR(H, 40073, Float), 2) + " A"
```

Áramerősség B fázis

```taphome
ROUND(MODBUSR(H, 40075, Float), 2) + " A"
```

Áramerősség C fázis

```taphome
ROUND(MODBUSR(H, 40077, Float), 2) + " A"
```

Feszültség L-N (átlag)

```taphome
ROUND(MODBUSR(H, 40079, Float), 2) + " V"
```

Feszültség AN (A fázis)

```taphome
ROUND(MODBUSR(H, 40081, Float), 2) + " V"
```

Feszültség BN (B fázis)

```taphome
ROUND(MODBUSR(H, 40083, Float), 2) + " V"
```

Feszültség CN (C fázis)

```taphome
ROUND(MODBUSR(H, 40085, Float), 2) + " V"
```

Feszültség L-L (átlag)

```taphome
ROUND(MODBUSR(H, 40087, Float), 2) + " V"
```

Feszültség AB

```taphome
ROUND(MODBUSR(H, 40089, Float), 2) + " V"
```

Feszültség BC

```taphome
ROUND(MODBUSR(H, 40091, Float), 2) + " V"
```

Feszültség CA

```taphome
ROUND(MODBUSR(H, 40093, Float), 2) + " V"
```

Hálózati frekvencia

```taphome
ROUND(MODBUSR(H, 40095, Float), 2) + " Hz"
```

Meddőteljesítmény összesen

```taphome
ROUND(MODBUSR(H, 40113, Float), 1) + " var"
```

Meddőteljesítmény A fázis

```taphome
ROUND(MODBUSR(H, 40115, Float), 1) + " var"
```

Meddőteljesítmény B fázis

```taphome
ROUND(MODBUSR(H, 40117, Float), 1) + " var"
```

Meddőteljesítmény C fázis

```taphome
ROUND(MODBUSR(H, 40119, Float), 1) + " var"
```

Teljesítménytényező összesen

```taphome
ROUND(MODBUSR(H, 40121, Float), 3)
```

Teljesítménytényező A fázis

```taphome
ROUND(MODBUSR(H, 40123, Float), 3)
```

Teljesítménytényező B fázis

```taphome
ROUND(MODBUSR(H, 40125, Float), 3)
```

Teljesítménytényező C fázis

```taphome
ROUND(MODBUSR(H, 40127, Float), 3)
```

Valós energia (import/export) Electricity Meter

Service Attributes

|                                  |
|----------------------------------|
| Exportált valós energia összesen |
| Valós teljesítmény A fázis       |
| Valós teljesítmény B fázis       |
| Valós teljesítmény C fázis       |
| Importált valós energia A fázis  |
| Importált valós energia B fázis  |
| Importált valós energia C fázis  |
| Exportált valós energia A fázis  |
| Exportált valós energia B fázis  |
| Exportált valós energia C fázis  |

Read total consumption

```taphome
MODBUSR(H, 40137, Float) / 1000
```

Read demand

```taphome
MODBUSR(H, 40097, Float)
```

Service Attributes

Exportált valós energia összesen

```taphome
ROUND(MODBUSR(H, 40129, Float) / 1000, 3) + " kWh"
```

Valós teljesítmény A fázis

```taphome
ROUND(MODBUSR(H, 40099, Float), 1) + " W"
```

Valós teljesítmény B fázis

```taphome
ROUND(MODBUSR(H, 40101, Float), 1) + " W"
```

Valós teljesítmény C fázis

```taphome
ROUND(MODBUSR(H, 40103, Float), 1) + " W"
```

Importált valós energia A fázis

```taphome
ROUND(MODBUSR(H, 40139, Float) / 1000, 3) + " kWh"
```

Importált valós energia B fázis

```taphome
ROUND(MODBUSR(H, 40141, Float) / 1000, 3) + " kWh"
```

Importált valós energia C fázis

```taphome
ROUND(MODBUSR(H, 40143, Float) / 1000, 3) + " kWh"
```

Exportált valós energia A fázis

```taphome
ROUND(MODBUSR(H, 40131, Float) / 1000, 3) + " kWh"
```

Exportált valós energia B fázis

```taphome
ROUND(MODBUSR(H, 40133, Float) / 1000, 3) + " kWh"
```

Exportált valós energia C fázis

```taphome
ROUND(MODBUSR(H, 40135, Float) / 1000, 3) + " kWh"
```

Látszólagos energia (import/export) Electricity Meter

Service Attributes

|                                        |
|----------------------------------------|
| Exportált látszólagos energia összesen |
| Látszólagos teljesítmény A fázis       |
| Látszólagos teljesítmény B fázis       |
| Látszólagos teljesítmény C fázis       |
| Importált látszólagos energia A fázis  |
| Importált látszólagos energia B fázis  |
| Importált látszólagos energia C fázis  |
| Exportált látszólagos energia A fázis  |
| Exportált látszólagos energia B fázis  |
| Exportált látszólagos energia C fázis  |

Read total consumption

```taphome
MODBUSR(H, 40153, Float) / 1000
```

Read demand

```taphome
MODBUSR(H, 40105, Float)
```

Service Attributes

Exportált látszólagos energia összesen

```taphome
ROUND(MODBUSR(H, 40145, Float) / 1000, 3) + " kVAh"
```

Látszólagos teljesítmény A fázis

```taphome
ROUND(MODBUSR(H, 40107, Float), 1) + " VA"
```

Látszólagos teljesítmény B fázis

```taphome
ROUND(MODBUSR(H, 40109, Float), 1) + " VA"
```

Látszólagos teljesítmény C fázis

```taphome
ROUND(MODBUSR(H, 40111, Float), 1) + " VA"
```

Importált látszólagos energia A fázis

```taphome
ROUND(MODBUSR(H, 40155, Float) / 1000, 3) + " kVAh"
```

Importált látszólagos energia B fázis

```taphome
ROUND(MODBUSR(H, 40157, Float) / 1000, 3) + " kVAh"
```

Importált látszólagos energia C fázis

```taphome
ROUND(MODBUSR(H, 40159, Float) / 1000, 3) + " kVAh"
```

Exportált látszólagos energia A fázis

```taphome
ROUND(MODBUSR(H, 40147, Float) / 1000, 3) + " kVAh"
```

Exportált látszólagos energia B fázis

```taphome
ROUND(MODBUSR(H, 40149, Float) / 1000, 3) + " kVAh"
```

Exportált látszólagos energia C fázis

```taphome
ROUND(MODBUSR(H, 40151, Float) / 1000, 3) + " kVAh"
```

**Connection:** Modbus TCP • Slave ID: $\[SlaveId]

## Import parameters

Enter these values when you import the XML.

| Asked in the app       | Default         |
|------------------------|-----------------|
| IP-cím                 | `192.168.1.100` |
| Modbus egységazonosító | `1`             |

## Related Documentation

- [Modbus Integration](https://taphome.com/en/compatibility/modbus-guide/)
- [Modbus](https://taphome.com/en/docs/integration/modbus/)
- [Simple configuration using templates](https://taphome.com/en/docs/integration/modbus/templates/)
- [Modbus scripts and prefetch](https://taphome.com/en/docs/script/modbus-scripts/)
- [Modbus functions](https://taphome.com/en/docs/script/modbus/)
- [Modbus data types](https://taphome.com/en/docs/script/modbus-data-types/)