If your Kostal Pico MP inverter provides data on http://your-inverter-ip/measurements.xml
Install https://github.com/danieldotnl/ha-multiscrape and use the following configuration to get the data to Home Assistant
Add this to the configuration.yaml and change the inverter IP from 192.168.0.90 used in the example to whatever is your inverter IP.
# Kostal inverter
multiscrape:
- resource: http://192.168.0.90/measurements.xml