Graph Accuracy

Hi,

Having completed a monitoring trial I am now writing up the findings using various graphs from dashboard.

I've noticed some differences in graphs over same period depending on specific Visualisation  API used. While bar graphs are broadly inline with each other,  the trend graphs vary quite a bit. I have attached example of the mains power feed over last week. Please comment and maybe recommend which is more representative of actual power trend. In particular I need to know maximum value used as this is needed to calculate maximum KVA e.g. max +10%.

Cheers

Peter