Fronius Verto 30.0

Commercial PV inverter

Verto 30.0 exposes a configurable SunSpec Modbus TCP server for local inverter monitoring. Its meter, RTU participant and cloud VPP settings are distinct. Use the installed inverter's own model list and keep all control permissions under the site's commissioned design.

Fronius Verto 30.0 PV inverter
  • Modbus TCP

Commercial PV inverter

Compatibility

Local SunSpec Modbus TCP monitoring

Fronius documents a TCP server, selectable SunSpec representation and ports 502 or 1502 for the Verto 25.0–33.3 family. Read-only identity and measurement checks still require the commissioned settings and discovered models.

This guide covers the non-Plus Verto 30.0 in the 25.0–33.3 operating instructions. Check the nameplate, regional rating, firmware, selected TCP port and float or int + SF model type. Verto Plus battery functions and RTU terminal ownership are separate. Do not enable Allow Control or cloud VPP control for this monitoring procedure.

Connect it with

For inverter production and operating measurements on the approved site network

  • Modbus
  • Edge
  • Platforms
Commercial PV inverter
Interface
Gateway
Edge
Output
Verto 30.0Verto 30.0 TCP server
Protected EthernetSegmented LAN
ZGW-20 GatewayHosts Edge locally
EpiSensor EdgeEdge Modbus TCP client
Customer platformMQTT · API · files
Modbus TCP
Protected Ethernet
Runs locally
Optional onward data
Read the Verto's configured server endpoint without changing its Allow Control, cloud control, meter, RTU or feed-in settings. A separate site meter is needed to establish grid import and export. The customer-platform output is optional; Edge remains the local system of record.

Models

Download
ModelsInterfaceRoute into Edge
Verto 30.0Non-Plus 25–33.3 family; TCP server with SunSpec model selectionUse the installed TCP port and discovered model list for read-only monitoring.
Verto 25.0 / 27.0 / 33.3Same operating-instruction family with different nameplate ratingsDo not substitute Verto 30.0's PV or AC limits for these models.
Verto PlusSeparate battery-capable product familyBattery control and the Plus manual are outside this Verto 30.0 guide.

Specifications

The exact Verto 30.0 product listing belongs to the 25.0–33.3 family. Its operating instructions describe a Modbus TCP server with selectable SunSpec float or integer-plus-scale-factor models and ports 502 or 1502. The meter address shown in the TCP settings is separate from the inverter's own measurements.12

Exact target
Fronius Verto 30.0, non-Plus, three-phase PV inverter12
PV design
Four MPP trackers; the exact site design and nameplate govern input limits2
TCP server
Commissioned port 502 or 1502; verify the inverter's configured endpoint1
SunSpec type
float models 111/112/113 or 211/212/213; int + SF models 101/102/103 or 201/202/2031
Meter identity
Meter address defaults to 200 and is not a substitute for an inverter identity read1
Security boundary
Unsecured Modbus TCP/IP; restrict it to the site LAN and avoid Internet port forwarding1

Interface

Documented measurements and integration boundaries for Verto 30.0.

  • The selected SunSpec inverter model can provide production power, voltage, current and operating state after its headers and data type are discovered on the installed unit.
  • The inverter's TCP server, RTU M0/M1 components, Solar API and Internet-dependent cloud VPP control are separate configuration surfaces.
  • A Verto inverter measurement does not by itself identify site import, export or consumption; record the feed-in meter and measurement location separately.
  • This guide approves no on/off, curtailment, reactive-power, power-factor or cloud dispatch write.

Assessment

Fronius Verto 30.0 non-Plus using its commissioned local SunSpec Modbus TCP server. Grid meter and Internet-dependent VPP cloud control are separate.

InteroperabilitySupported with conditions
Fronius documents the exact-family TCP server and SunSpec model choices; commissioned settings and model discovery are required.1
AccuracySupported with conditions
Inverter models can supply production telemetry, but feed-in-point import and export require a separate meter contract.1
SecurityLimited
Fronius identifies Modbus TCP/IP as unsecured and advises against Internet port forwarding; use a restricted site LAN.1
ReliabilityNot yet assessed
The manual does not establish availability, stale-value detection or historical backfill for this local Edge reader.1
RuggednessNot yet assessed
The exact installation environment has not been compared with the Verto 30.0 enclosure limits.2
ScalabilitySupported with conditions
Each inverter has its own endpoint; preserve the site's existing controller and meter topology when adding readers.1
LifecycleNot yet assessed
The retained manual does not establish a guaranteed software-support or hardware-replacement period.1

Setup

Discover the SunSpec model, then read power

Start with the configured local TCP server and its inverter unit ID. The reads below use FC03; the returned SunSpec model determines the measurement layout. Byte values and the example model position are synthetic.

Connection
Use the inverter LAN address and configured TCP port 502 or 1502. Read the inverter identity, not the meter at its default unit ID 200. Leave Allow Control off.
Signature read
FC03 at wire address 40000, quantity 2: PDU 03 9C 40 00 02. Expected SunSpec signature bytes 53 75 6E 53 spell SunS. If absent, check endpoint and unit ID before selecting points; the standard also permits bases 0 and 50000.
Common model discovery
Read the two-register header after the signature. Synthetic bytes 00 01 00 42 indicate common model 1 and 66 following registers. With its header at wire 40002, the next header is 40002 + 2 + 66 = 40070. Compare manufacturer, model and serial number in the common model.
Select the returned model
Only use the power calculation below if the returned header identifies model 103, the three-phase int + SF model. Models 113, 203 or 213 have different definitions; use their own layout without changing the representation another client uses.
Conditional model-103 power read
Let H be the discovered model-103 header address. W is at H + 14 and W_SF at H + 15, each signed 16-bit. FC03 quantity 2 reads both. If H = 40070, the wire address is 40084 (0x9C94), PDU 03 9C 94 00 02. H = 40070 is an example, not a fixed Verto address.
Synthetic decode
Bytes 30 39 FF FF decode to W = 12345 and W_SF = -1. Calculate 12345 × 10^-1 = 1234.5 W. Decode the scale factor as signed; do not treat this pair as Float32. A signed value 0x8000 is unavailable, not zero power.
Next monitoring points
For returned model 103, frequency is at H + 16 with its signed scale factor at H + 17. Keep inverter production separate from the site meter’s import/export reading.

Acceptance: Compare a fresh decoded power value with the inverter interface before adding points. This is a public-documentation starting point and synthetic decoder example, not a physical Verto test or a control procedure.

  1. Identify the inverter

    Confirm Verto 30.0 non-Plus model, firmware and regional nameplate before selecting a map.

  2. Record the TCP settings

    Record the configured TCP port and SunSpec representation without changing Allow Control, cloud control or site-controller priorities.

  3. Preserve the network boundary

    Restrict the unsecured TCP endpoint to an approved site LAN; never expose it through port forwarding.

  4. Compare the first reads

    Discover the SunSpec signature, common identity and model headers as shown below. For returned model 103, read W and W_SF at header offsets 14 and 15 and compare decoded power with the inverter interface.

  5. Keep system roles separate

    Treat meter readings and cloud VPP dispatch as separate integration and control contracts.

Common questions

Does monitoring require the Verto's Allow Control switch?
No. Fronius lists the TCP server and Allow Control as separate settings. This procedure reads measurements and leaves the control permission unchanged.1
Is Fronius cloud VPP control the same as local Modbus TCP?
No. The manual describes cloud VPP control as Internet-dependent and separately documents the local TCP server. Neither setting proves that EpiSensor supplies trading or balancing services.1
Can the inverter's power value replace a grid meter?
No. Production at the inverter and import or export at the feed-in point have different measurement boundaries. Read the site meter as a separately identified device.1
Can I use fixed SunSpec register offsets from a Tauro or GEN24?
No. The Verto offers different model representations. Discover the installed model headers and lengths before decoding any value.1

Sources

  1. Fronius Verto 25–33.3 kW operating instructions (opens in a new tab) Fronius
  2. Fronius Verto 30.0 product and technical data (opens in a new tab) Fronius
  3. SunSpec Device Information Model Specification 1.1 (opens in a new tab) (PDF) SunSpec Alliance
  4. SunSpec three-phase inverter model 103 definition (opens in a new tab) SunSpec Alliance

Further reading

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