My base rate in the Bay Area, CA is 26c/kWh for the first 300kW tier. The community where I live doesn't have peak/off-peak rate plan. If I charge the car at home and jump 3-4 tiers, it will cost more to drive compare to an efficient hybrid car.Welcome to California. If I charge during peak its 54c/kWh. Partial peak is 24c/kWh. And the best rate for me is off peak (the only time I do charge) is at 13.5c/kWh.
And unfortunately this year because of lack of water and little hydro generation, I am using natural gas generated electricity. Those who are on rate plans more aligned to solar can charge during the day and use sun energy.
The SuperChargers around here have the off peak rate of 20c/kWh so it's cheaper to supercharge. Luckily, there're plenty of free chargers around so I haven't been paying to charge the cars.