Need help to get custom library for Solar Frontier to work

Configuration
1

Hi there, I am an enthusiastic newbie to Home Assistant and try to get some information from my SF-WR-3600 inverter. I got the info from the measurements.xml to work, but also found a custom library: PySolarFrontier (pysolarfrontier · PyPI). I would like to try that one as well. I did an install of the library, but I can’t figure out what to do next and where to put the files.
Can anyone can share their experience with this library and how you set this up? Very much appreciated!

2

Hello Peter, what script are using for reading measurements.xml?

This is what i am using right now. Still got some errors because at night some fields do not exist.

sensor:
  - platform: systemmonitor
    resources:
      - type: processor_use
      - type: processor_temperature
      - type: memory_use_percent
      - type: memory_use
      - type: memory_free
      - type: disk_use_percent
      - type: swap_use_percent
      - type: swap_use
      - type: swap_free
      - type: last_boot
  - platform: rest # Uitlezen van Solar Frontier Inverter
    resource: http://aaa.bbb.ccc.ddd/measurements.xml
    json_attributes:
      - root
      - Measurements
    name: Solar_Frontier
    scan_interval: 60
    timeout: 20
    value_template: 'OK'
  - platform: template
    sensors:
      solar_live_output:
        value_template: >
            {% set root = state_attr('sensor.solar_frontier', 'root') %}
            {% if root.Device.Measurements.Measurement is defined and root.Device.Measurements.Measurement | length > 0 %}
              {{ (root.Device.Measurements.Measurement | selectattr('@Type', 'eq', 'AC_Power') | list | first)['@Value'] | default }}
            {% else %}
              0
            {% endif %}
        device_class: power
        unit_of_measurement: 'W'
        friendly_name: Solar Frontier Live power
      solar_live_temp:
        value_template: >
            {% set root = state_attr('sensor.solar_frontier', 'root') %}
            {% if root.Device.Measurements.Measurement is defined and root.Device.Measurements.Measurement | length > 0 %}
              {{ (root.Device.Measurements.Measurement | selectattr('@Type', 'eq', 'Temp') | list | first)['@Value'] | default }}
            {% else %}
                0
            {% endif %}
        device_class: temperature
        unit_of_measurement: '°C'
        friendly_name: Solar Frontier temperature
  - platform: integration # Omzetten Solar Frontier Watt naar kWh
    source: sensor.solar_live_output
    name: Solar Frontier Energy Created
    unit_prefix: k
    round: 3

# Solar Frontier bereken dagelijks/maandelijks prodcutie
utility_meter:
  daily_energy:
    source: sensor.solar_frontier_energy_created
    name: Solar Frontier Daily Energy
    cycle: daily
  monthly_energy:
    source: sensor.solar_frontier_energy_created
    name: Solar Frontier Monthly Energy
    cycle: monthly
  yearly_energy:
    source: sensor.solar_frontier_energy_created
    name: Solar Frontier Yearly Energy
    cycle: yearly