In the upper left margin of the graph utility, there are a series of tabs: Voltage, Power, Energy, and (sometimes) Outputs:
If you click on Energy, all of the inputs and outputs with Watts units will be listed:
When you plot these, you are plotting total kWh for that input since installation, during the period selected in the graph. Here’s my total kWh for the past week:
This isn’t really very useful yet, but it does have some good information that I’ve highlighted at the bottom:
- The Max figure is your up-to-date running kWh total.
- The Diff figure is the total kWh used during the week.
Now if you are interested in something like daily kWh usage, you can use the graph functions to produce that from what you have. Using the various options at the bottom:
- Select period Type “Daily” in the top line.
- In each detail line, select Type “Bars” and check the “Delta” box. This tells graph to plot the difference in kWh in each day instead of the cumulative total at the end of the day.
- Press “Reload” in the top line:
Now you have a histogram of daily kWh over the last week. If you are interested in the numbers you can display the CSV:
There is a caveat here. Days begin and end at 24:00 UTC (GMT) rather than your local time. That’s something that needs to be addressed in a future release.