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You are correct that I was assuming that the Tesla data was an instant sample at the timestamp. I didn't make that assumption up out of thin air, so I'll have to refresh my memory about where I found that. There are some curious points that I don't seem to be communicating effectively because...

Redquill_qik"It isn't clear what you are looking at, so posting CSV files for your Tesla data, SCE data and a table of calculations would be valuable. Again, the Tesla monitoring of the grid is almost surely the problem especially if you have unbacked up loads." File is attached in previous...

Thanks for the thoughtful responses. The assumptions underlying the "5/60" method and my method are different, but both are built on assumptions. The "5/60" method assumes that the power is constant within each 5 minute interval. My method assumes that the power varies within the range...

Thanks for your reply. Maybe I'm missing something, but it seems odd that most days the data from SCE & that from Tesla is spot on in agreement, if my methodology is wrong. 5 minutes * 3 = 15 minutes. 15 minutes = 0.25 hours. kW * hours = kWh. Multiplication by 0.25 = division by 4. Also...

Upon completing the analysis of this billing cycle, the discrepancy is over 800 kWh for this bill alone!!! While on many days, the SCE & Tesla data align perfectly, on other days there are significant discrepancies. If this is happening systemically, it would add up to MILLIONS of $$$ being...

I noticed major discrepancies as well, so I downloaded the data from SCE, which is reported in 15 minute increments as kWh, with one data blob being for usage followed by another data blob for the same day reporting kWh received from our rooftop generation (minus what we use for our home & the...