Hey… I am here again 
Yes I have an InfluxDB as data source.
Could you help me to set up the query with your Idea(s)?
Here is my query, which does not give me any data:
SELECT mean("value")*3.6 FROM (SELECT mean("value") FROM "autogen"."Item_Garten_Steckdose_Solarpanel_Poolhuette_EnergyCurrent" WHERE $timeFilter GROUP BY time(1s) fill(previous)) WHERE $timeFilter GROUP BY time(1h) fill(null)