My sense unit started to read negative numbers in the middle of the day. At this time of the day (1500/3pm) it should be producing 8-9 Kw. I noticed the negative numbers at around 1000. Has anyone encountered this before?
Is this a new installation? Check your CT clamps to make sure an extra wire is not clamped. Check to make sure CT clamps are completely closed.
As @markhovis73 mentioned, that definitely looks like an installation issue. And if it’s not a recent installation, perhaps somehow one of your clamps opened up in the panel. If you’re able to verify that it’s installed correctly, you should write into firstname.lastname@example.org and they can help you out.