Well I am seeing some of what you describe as normal and some of what you describe as an error. At night I see nominally 3-5 watts makes as negative but bouncing back and forth as plus minus. At that time there is no usage shown on the meter display that appears to be related to the solar.
AS the sun comes up and the solar begins to produce, there is a baseline power use that mirrors tha solar production. That usage runs from almost nothing under low production; up to about 1,200- 1,400 watts at full generation levels. On the sense displays this shows up as power usage in the house with solar going to the house and the grid. On what meter is shown up in the power usage as a wave of increasing and decreasing usage perfectly matching and mirroring the solar generation as it fluctuates.
Now I just spent the last 40 minutes looking at how all this is put together inside my panels and it is exactly as shown in the Sense install instructions.
AS I have watched this over the past weeks, I have often wondered if this fluctuating usage pattern was screwing with device detection. I cant say either way; but I would think it would be an issue. But to me it would seem that unless you show the power used by the inverter you are not getting the full picture of what is happening with the system. I realize most folks are only interested in net production but I also want to know how much my system is costing me to operate.
But wahat you are telling me is that this is some kind of Sense error and that this should not be showing in my displays. If that is the case then it clearly needs to be fixed. Here is a part of todays meter showing this variable power usage curve…Note the baseline usage looks almost exactally like the solar production.
