Plugwise Stretch does not show energy used/produced

[freekdk]

I installed the plugin Plugwise Stretch and got it up and running.
When I look at the widget on the Dashboard or Others, it shows the Watts when there is use or production. I my case mostly production. My Stealth is in the circuit of my solarpanels. However I also see Today, but the value is always zero. How do I get this value to show the used or produced energy in kWh during the day? There is also nothing in the graph for the week, month or year.

[freekdk]

Please IGNORE. See Python for further discussion.