There is a difference between :
- the per day chart (in orange) produced by the graph module using the accumulated feed
- the per day chart (in blue) produced with the phptimeserie feed resulting of the emoncms kwhkwhd process

this is related to gaz consumption but it should not be like that : sometimes 3 days are missing
For the accumulated feed, the recording occurs each 300 s, and it has many missing points
