Just got Sense+Solar installed, and it worked great for the first 6 hours. But then 90 minutes after solar production went to zero in the evening, the Consumption plot started showing the negative of the actual consumption. The next day, the Consumption plot was clearly correlated to the Production plot. I did some math and it turns out that it’s plotting Consumption as 2*Production-Consumption. When I turn on an appliance the Consumption plot drops by the wattage used. Here’s a plot of this odd equation:

The deep dip near the right is a -5100w drop when I turned on my dryer. The jagged section on the left is due to the jagged solar production as the sun comes up behind some trees. You see that it is mirrored in the consumption plot, incorrectly.

I guess it’s a calibration problem, but why did it work for the first 6 hours? Here is the first 6 hour plot:

Service has been contacted but it’s the weekend.