Lol, yeah I thought PG&E was intentionally making the B&W bill impossible to deconstruct and explain (even though it is like 13 pages) so they could bury stuff in there and screw with the NEM calc.
But after dropping everything into a spreadsheet I found their math actually adds up and is consistent with rates they published to the CPUC. So while their 13 page bill is absurd, it is possible to replicate their math in a logical way and arrive at their calculations.
The only thing that may have some monkey business is the metered kWh that passes through the PG&E meter. I have no way to validate the meter reading. I can tell that the Tesla app and the meter aren't aligned, but how could a homeowner claim an alleged revenue grade "smart meter" is good/bad compared to an alleged "revenue grade" Tesla Energy Gateway 2? The TEG2 insists I'm exporting about ~10% more kWh than what PG&E's meter registers.
Edit: Actually there is something that maybe CCA folks could research. PG&E has a calc for $0.04760 per kWh for a "CCA power Charge Indifference" on each kWh of generation minus consumption. This is a "2017 vintage" calc. This effectively makes the per kWh cost of energy go up compared to non-CCA folks. This means (for now under existing NEM rules) if you're a net generator you have a net benefit of $0.04760 per kWh. I don't know how long this thing persists and it's not terribly clear to me if the benefit on being a net generator will persist through the NEM calc. But for now it appears as a good-guy item for me since I'm a year-to-date net generator.
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