[zdimension]

> Aside from that I am curious about the discontinuity at 22h.

My water heater turns on during off-peak hours (so, at 22h). I have no other equipment that responds to the off-peak signal, so the discontinuity is entirely attributable to the water heater.

> The color scale on the hour/day grid initially seemed backwards to me.

I think it was one of the default color scales in Plotly. Maybe I got used to it, it doesn't strike me as reversed, but I think I see how it would feel that way for you.

> The daily total takes up so much space

That is true, though it didn't disturb me enough to bother changing its size.