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[kevin1]

Welcome @medicjwilson,
Fun stories… Bummer that your solar installer didn’t hook up the mains CTs(sensors) for Enphase, but now you have Sense. I bought Solar via SolarCity (now Tesla) in 2013 (21 220W panels / 4.62kW) for 15.5k$ (with then tax credits going to them). Looking at another Sense user’s Enphase setup, it looks fairly nice.

Difference In Daily Total Usage

My utility tracks usage and generation (the amount I send back to the grid). On my bill they subtract the generation from my total usage to come up with a new total usage and then bill me on that. My house will will sometimes use directly from the solar as it is being generated. What it doesn’t use will get sent to the grid. This typically happens in the middle of the day. [Enphase] I am working on putting together a spreadsheet that shows what my utility says I used on a given day, and wha…

But the Enphase net usage data is also less accurate vis a vis their utility numbers, vs. Sense.

Solar Production Comparison

You might need to re-regress the fit lines. But with that change, the fit is much better as told by the residuals. In my case, point 33 and point 1 look like the worst. Point 33 is missing 1 hour, because I had to do the offset and only have the CMP data through 1/6/21 23:00. Picture the residuals as an exaggerated view of the points on either side of the fit line. [resid2] [resid1] If I pull point 33 (1/6/21), both graphs look pretty good. [enphase] [sense] One thing that is highly…