Getting spikes in emonCMS graph

There isn’t anything obviously wrong with this data (to us at least) it is increasing only and the values seem believable (without any context to consider).

You have posted a link to a graph on your local emonpi (http://emonpi/emoncms/graph/3) which obviously we cannot view. I these instances we ask you post a screenshot rather than a (working) link because as time passes the link to live data would change and the context of the discussion is lost.

Can you specify what is wrong with the current value, ie what it is and what you think it should be and why?