I've read several threads here of people asking about why their Tesla data don't reconcile/agree with their PG&E data. I have the same question, and none of the other threads really seemed to apply to my situation.
I have a 8.6kW Tesla system with 2x powerwalls. I typically see peak production power in the summer months of around 5.5-6kW.
My Tesla app data and downloaded PG&E data never agree, not even close. But the trends are similar (high months are high in both sources, low months low in both, etc.)
I've downloaded data for Jan through Sept of this year for both PG&E and from the Tesla app:
TESLA:
PG&E:
I recognize that the "from grid" data from Tesla is going to be always positive... or at least I think that's true. But when I add the "from grid" and the "to grid" columns in the Tesla data, the result is still very off:
What math is going to get me a version of the Tesla data that is within a ballpark of the PG&E usage data? I understand that CT's are not as accurate as PG&E's smartmeter, but still these data are way off.
Any help understanding this would be greatly appreciated.
Note: I don't care at the moment about the dollar values associated with these data. That gets way too confusing. I'm just hoping that the actual power flows, regardless of the price, match up, and wondering if I need to get anything fixed so I'm not under or over paying for my PG&E service. Thanks!!!
I have a 8.6kW Tesla system with 2x powerwalls. I typically see peak production power in the summer months of around 5.5-6kW.
My Tesla app data and downloaded PG&E data never agree, not even close. But the trends are similar (high months are high in both sources, low months low in both, etc.)
I've downloaded data for Jan through Sept of this year for both PG&E and from the Tesla app:
TESLA:
Date time | Home (MWh) | Solar Energy (MWh) | From Powerwall (MWh) | From Grid (MWh) | To Grid (MWh) |
2022-01-01T02:00:00-07:00 | 1.03 | 0.44 | 0.2 | 0.72 | -0.09 |
2022-02-01T02:00:00-07:00 | 0.91 | 0.56 | 0.3 | 0.44 | -0.02 |
2022-03-01T02:00:00-07:00 | 0.92 | 0.83 | 0.39 | 0.29 | -0.15 |
2022-04-01T01:00:00-07:00 | 1.21 | 1.08 | 0.45 | 0.46 | -0.27 |
2022-05-01T01:00:00-07:00 | 1.11 | 1.32 | 0.44 | 0.29 | -0.45 |
2022-06-01T01:00:00-07:00 | 1.36 | 1.27 | 0.45 | 0.52 | -0.37 |
2022-07-01T01:00:00-07:00 | 0.94 | 1.24 | 0.35 | 0.31 | -0.57 |
2022-08-01T01:00:00-07:00 | 1.19 | 1.08 | 0.46 | 0.39 | -0.21 |
2022-09-01T01:00:00-07:00 | 0.89 | 0.74 | 0.41 | 0.35 | -0.17 |
| | | | |
PG&E:
Month | Total kWh |
Jan | 962.72 |
Feb | 681.83 |
Mar | 456.13 |
Apr | 461.02 |
May | -27.49 |
Jun | 543.37 |
Jul | -43.79 |
Aug | 725.99 |
Sep | 618.55 |
Oct | 0 |
Nov | 0 |
Dec | 0 |
Total yr | 4378.33 |
I recognize that the "from grid" data from Tesla is going to be always positive... or at least I think that's true. But when I add the "from grid" and the "to grid" columns in the Tesla data, the result is still very off:
What math is going to get me a version of the Tesla data that is within a ballpark of the PG&E usage data? I understand that CT's are not as accurate as PG&E's smartmeter, but still these data are way off.
Any help understanding this would be greatly appreciated.
Note: I don't care at the moment about the dollar values associated with these data. That gets way too confusing. I'm just hoping that the actual power flows, regardless of the price, match up, and wondering if I need to get anything fixed so I'm not under or over paying for my PG&E service. Thanks!!!