Hi there.
For some reason the use_kwh feed reset itself at some point. It took place when the electrician came to install a new consumer unit for an EV car. Not entirely sure the exact reason for it however.
You can see it in this graph:
I second this. One bad value and your whole feed is broken
I have tried using the EditDaily function on the PHPTIMESERIES feed but that seems to be broken (or I don’t know how to use it).