What is the correct settings for showing yearly data?

[henriknordgren]

I have gotten daily (by hour) and monthly (by day) to work. But when I want to show a donut pie diagram by year, I fail. The calculations for total seem all wrong, as well as the graph itself.

The documentation is not clear, but I assume I should use days as the unit of setting things up. I have set it up like this:

graph_span: 365d
            span:
              start: year          
              offset: |
                [[[ 
                   return '-0d' // (for this year)  -365d for last year etc?
                  
                 ]]] 


I then use statistics for the data, with lifetime sensors configured like this:

 - entity: sensor.qubino_3_phase_smart_meter_electric_consumption_kwh
                name: Climate
                statistics:
                  type: change  // the delta. 
                  period: month // This is very confusing, how will it calculate the delta from 2024-01-01 to 2024-12-31 ???? 

I assume everything is set up according to the documentation. My only concern is the entities and statistics. Since year is not supported for period, I have to set month instead. But how does it know which months to calculate? I assume it uses graph_span, start and offset to figure that out? Or am I mistaken?

regards
Henrik