How long before you lost interest and moved on?

[kevin1]

Interesting @rgmichel. My observations have been that Sense, especially in the past (2019 and earlier), had some measurement reliability issues, but that when all is well, it is incredibly close to my utility net meter (within +/- 0.5%). And if I try to substitute my solar inverter data for my Sense solar data, I get much larger discrepancies during the daytime, because the inverter metered production is about 3% greater than Sense shows.

How to Tell When Your Sense is Lying to You

Chapter 1 - Introduction I love my Sense ! In general it is a very accurate tool for looking at my energy consumption, especially when coupled with smart plugs, DCM, etc. But even though I trust it, the old saw goes, “Trust, But Verify”. I decided to look back over my almost 2 years (16,090 hourly observations) with my current Sense to see if I can find discernible patterns of when it led me astray, especially with the most basic of measurements. The plot below highlights the comparison of Se…

From what I have seen on this forum, there are many more solar users that see their solar inverter data as being 2-4% “over optimistic” on a systematic basis, vs Sense and correlation with their utility meter. One example below.

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…

So in my mind, Sense is a little more prone to outages, especially in the past, but is also more accurate at the meter box than most solar inverters.