in CA, it's essentially required at this point to pick a TOU plan. It may be possible to drag it a bit, but ultimately you get to chose. Unfortunately, the peak and off peak rates are both high compared to what we had just a decade ago when we still had 4 tiers, with the base tier (60% of average use by a miser) being 12 or 13 cents, and then it shooting up into the upper 20s. In that period, it was ideal to have enough solar to keep you out of tiers 3 and 4. Then it collapsed to 2 tiers both in the 20ths, single rate, and now our TOU.
TOU is either 4-9pm every day, or 5-8 on weekdays. I took the latter as I moved to solar. There is also a couple EV rate plans, but not advantage for me over the existing rate metering, and not enough incentive that I see to do middle of the night charging schedules.
Weirdly, the grid friendliest time for me to charge is 10am-3pm, esp in the spring when solar generation has to be curtailed due to excess.
