Telegraf Input and Processor plugin configuration for Fronius Inverters using SolarAPI

telegraf.conf

###############################################################################
#                            PROCESSOR PLUGINS                                #
###############################################################################

[[processors.strings]]
  ## Replace all non-overlapping instances of old with new

  ## Trim the given prefix from the field
  [[processors.strings.trim_prefix]]
    field_key = "*"
    prefix = "Body_Data_Site_"
  [[processors.strings.trim_prefix]]
    field_key = "*"
    prefix = "Body_Data_0_"


###############################################################################
#                            INPUT PLUGINS                                    #
###############################################################################

# Read formatted metrics from one or more HTTP endpoints
[[inputs.http]]
  # measurement name
  name_override = "smartmeter"
  # override default http query interval
  interval = "1m"

  ## One or more URLs from which to read formatted metrics
  urls = [
    "http://${FRONIUS_IP}/solar_api/v1/GetMeterRealtimeData.cgi?Scope=System"
  ]

  ## Data format to consume.
  # json parsing
  data_format = "json"
  json_time_key = "Body_Data_0_TimeStamp"
  json_time_format = "unix"
  
  # data filtering
  # EnergyReal_WAC_Plus_Absolute ... Import
  # EnergyReal_WAC_Minus_Absolute ... Export
  # Power* individual phases; *_Sum only sum of all phases.
  fieldpass = [
    "Body_Data_0_Energy*",
    "Body_Data_0_Current_AC_*",
    "Body_Data_0_Power*",
    # "Body_Data_0_*_Sum"
    ]

[[inputs.http]]
  # measurement name
  name_override = "powerflow"
  # override default http query interval
  interval = "1m"

  ## One or more URLs from which to read formatted metrics
  urls = [
    "http://${FRONIUS_IP}/solar_api/v1/GetPowerFlowRealtimeData.fcgi"
  ]

  ## Data format to consume.
  # json parsing
  data_format = "json"
  json_time_key = "Head_Timestamp"
  json_time_format = "2006-01-02T15:04:05Z07:00"
  
  # data filtering
  fieldpass = [
    "Body_Data_Site_P_*",
    "Body_Data_Site_rel_*",
    "Body_Data_Site_E_Total"
  ]

I haven't tested the envirnoment variable unpacking (${FRONIUS_IP}) yet. I've just hardcoded the IP.