It took over a month to resolve, but I'm happy to report that the discrepancies between Tesla's grid usage numbers (from my powerblaster) and my utility's meter numbers have been fixed.
TLDR; Tesla mistakenly registered my powerblaster in their system so the data from it was not being allocated properly.
I first spent a week or so collecting data and experimenting to convince myself that I had a problem worth reporting to Tesla. I then drafted an email with the details including photos of my powerblaster in the breaker box. I called customer service, waited to talk to a person, and then convinced them to give me a direct email address to send my details. After some back and forth, the customer service rep said my issue would be forwarded to tier 2 and that I should wait to hear back from them.
So, I waited.
After not hearing anything for a couple of weeks, I called customer service back. They looked at my file and realized that my case had never actually been forwarded to tier 2. They apologized and said my issue would be forwarded to tier 2 and that I should wait to hear back from them.
A couple of days ago, I noticed that my grid usage numbers changed for all my historical data and that the numbers looked much closer to my utility's numbers. I called customer service today and got confirmation that the problem was a clerical error and that it had been fixed (no one contacted me to tell me that things had been fixed
).
So, I'm happy that things are fixed and that they were fixable remotely - but the process was frustrating.
I also thought it might help others to know that incorrect CT setup isn't the only potential source for data problems.
Now I can go back to obsessing over whether my system will produce enough over time
.