One thing I find funny is, SCE just (as in less than 24 hours ago now) emailed me about "you can switch to another rate plan, here is what that would look like".
I am still under a regular domestic (tiered) plan, which is not TOU, and holding onto it for dear life. Under that current plan, I dont have a Time of use, I pay more for energy the more I use. Keeping my energy use as low as possible (using self powered mode) benefits me more than "when" i use it.
I also have been using energy in my home "as if" I had a time of use plan for several months now, in preparation / practice for when they finally try to take this away from me. What I mean is, I charge my model 3 at 3am in the morning (always finishes by 5am), we set the dishwasher to run after midnight with its delay setting, stuff like that. I have been doing that for almost a year.
The reason this is relevant is, I have been using energy as if I had a time of use plan for almost a year, so any evaluations by SCE on my energy usage and swapping to a new plan should be fairly accurate.
This is what they sent me, as costs for my current domestic plan vs TOu 4-9 and TOU prime:
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I found it interesting (and funny) that their own tools show that I should "do nothing" as all the options are more. The interesting part is, TOU 4-9 shows as cheaper for me than TOU prime, even though I have an EV and charge it overnight. I am guessing this is because I drove a "LOT" less last year (like 20k miles in 2019 vs 6k in 2020).
To me, this shows that people likely need to do their own research on whether TOU 4-9 or TOU prime is better for them, regardless of whether they have an EV or not (and if you are grandfathered into a domestic plan in CA, you likely dont want to do anything to change that.)