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Peter Trimmel edited this page Feb 19, 2019 · 1 revision

Fronius

This library provides access to various data fields from the Fronius Symo 8.2-3-M inverter. The data properties are based on the specification Fronius Solar API V1 (42,0410,2012,EN 008-15092016).

With power categories ranging from 3.0 to 8.2 kW, the transformerless Fronius Symo is a three-phase solar inverter. The high system voltage, wide input voltage range and two MPP trackers ensure maximum flexibility in system design. The standard interface to the internet via WLAN or Ethernet make the Fronius Symo easy to integrate.

Integrated WLAN interface: With the Fronius Datamanager, the Fronius Symo offers a WLAN interface in the inverter itself. The inverter is connected to the internet without additional cabling and support the monitoring of the PV system and its operation.

Open data communication: The open Modbus TCP SunSpec standard protocol provides a simple way of establishing a data connection to other systems. The protocol is used via the existing Ethernet interface, guaranteeing reliable communication. Additionally a REST based Web service interface allows simple access to the inverter data.

Fronius REST Web Service API

The REST Web Service of the Fronius Symo provides access to various data sets:

  • Inverter Info
  • Logger Info
  • Common Data
  • Phase Data
  • MinMax Data
InverterInfo

The InverterInfo class holds the following properties:

  • Index
  • DeviceType
  • PVPower
  • CustomName
  • Show
  • UniqueID
  • ErrorCode
  • StatusCode
LoggerInfo

The LoggerInfo class holds the following properties:

  • UniqueID
  • ProductID
  • PlatformID
  • HWVersion
  • SWVersion
  • TimezoneLocation
  • TimezoneName
  • UTCOffset
  • DefaultLanguage
  • CashFactor
  • CashCurrency
  • CO2Factor
  • CO2Unit
CommonData

The CommonData class holds the following properties:

  • Frequency
  • CurrentDC
  • CurrentAC
  • VoltageDC
  • VoltageAC
  • PowerAC
  • DailyEnergy
  • YearlyEnergy
  • TotalEnergy
  • StatusCode
PhaseData

The PhaseData class holds the following properties:

  • CurrentL1
  • CurrentL2
  • CurrentL3
  • VoltageL1N
  • VoltageL2N
  • VoltageL3N
MinMaxData

The MinMaxData class holds the following properties:

  • DailyMaxVoltageDC
  • DailyMaxVoltageAC
  • DailyMinVoltageAC
  • YearlyMaxVoltageDC
  • YearlyMaxVoltageAC
  • YearlyMinVoltageAC
  • TotalMaxVoltageDC
  • TotalMaxVoltageAC
  • TotalMinVoltageAC
  • DailyMaxPower
  • YearlyMaxPower
  • TotalMaxPower

Fronius Class

The Fronius class implements all communication routines to read the data values from the Fronius Symo inverter. The only data needed to instanciate a Fronius class instance are:

  • A logger
  • The base uri
  • The device id

The Fronius class provides simple Read() methods to update the data values. Additional property helper functions allow to read properties or get property values.

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