Hi Gerben, thx for the suggestion. But the totalization of power usage/production over time is something I do not want to incorporate in my app. It should be a reporting feature from Homey itself. Maybe Athom can include more statistical views in insights, or in some other way 
The way I get these type of statistics is to use the Enelogic website. There I get a dashboard with all the energy statistics. This service works with the youless and is free with history limitations, or paid for longer history.
Another way to get totals per day is to make use of Homey variables. See this item: Wie heeft er mooie flows gebaseerd op de opwekking van zonnepanelen en wil die delen?
