Entity updates not reflected on graphs

[sunseeker2k5]

Good day. I have just installed the addon and been enjoying it so far, great stuff.

I have an issue, I created a bar graph to show my solar production but the graph values don't update with the entity:

Here are the code views:

I tried setting the auto update interval manually to 5 or 10 seconds but didn't help. The entities are refresh every 30 seconds btw.
I would appreciate some help as to what I am doing wrong.

Thank you
Sun