There's another thread about this... posted my thoughts here:
I have a 7.5 kw solar system that was installed 10 years ago. I added 2 Tesla batteries late last year. I am on a grandfathered PGE E6 rate however the choices on the Performance section only show Etou a, b, c and EV rates. E6 is very attractive as I sell to the grid at the same rates they sell...
teslamotorsclub.com
For now, I think it comes down to whether or not you think you'll be able to get enough solar to be a net producer on the year. And whether you'll have enough batteries to let you ride through the 3pm to midnight shoulder+peak time under EV2A (or similar TOU plans where the peak and off-peak have a huge differential).
What's tougher to predict is how being exposed to IOUs will evolve. It seems every 3 years PG&E takes repeated shots at "wealthy" homeowners with solar and batteries. You're basically investing your money now with Tesla (or whoever your PV+ESS seller is) to delay the inevitable since you know PG&E is coming for your $. The only way around this is to be like that one dude who spent like $300k to get a 300 kWh Tesla Powerpack and monster solar installed on his property. Probably has propane for backup as well. Need to completely go off grid to get away from PG&E... and most people don't have enough land or money to pull this off.
PG&E's endgame is putting a meter on you your house that measures all energy you use regardless of where it comes from or what form it's in (gas or electric). Then charging you for that energy at the rates they deem necessary to offset their ridiculous cost structure. Any excess juice you may send back to them will be punished, so you end up just taking energy from them and generating as little as possible. This endgame may not happen for 20+ years, but it'll happen one of these days.