I think there is a very long answer to this. SDG&E offers several EV-TOU rates, but I’m not well versed in many of them. I know the best one for someone with a small solar system (net consumer) or no system at all, is EV-TOU-5. It has a super-off-peak rate of $0.09 / kW-h, but comes with a fixed $16 / month fee (that’s not a minimum use–you pay it no matter what).
I have a small east-facing solar system and a Tesla model S, and I’m a net consumer. My sweet spot is TOU-DR-P. On peak rate isn’t too bad, and a modest discount for super-off-peak. The trade-off is those reduce-your-use days (of which there are only a few per year, obviously during super hot weather): My rate from 2pm-6pm is crazy high, like $1.40 / kW-h. Whenever that happens I’ll just stay a work late.
Also, I don’t have a Tesla home battery or anything, but I think one could really game the TOU rates, especially the EV-TOU-5. Load up super-off-peak, and dump on-peak.
