extract metrics from kostal inverter for PV Solar and submit them to InfluxDB
My inverter has an old firmware, so it doesn't have the http://hostname/api/dxs.json
So I couldn't use work like: kostal-dataexporter
So, looking at the source code of the page: http://hostname/pages/livechart.html
there's a XML endpoint at http://hostname/measurements.xml which is used to read the data.
I've created a 
to monitor my system.
It uses raw data, but it also uses synthetic metrics to at a glance read total power generation and consumption (see kostal_inverter_msf). Here's the json config of the dashboard