PG&E is 62 cents/kwh for peak rate above-baseline, I believe 52 cents/kwh for off-peak (which most EV charging would be). Gas prices where I'm at are around $4.20/gal. I ran the numbers for my Mazda CX-90 PHEV SUV, which gets about 1.7 mi/kwh on electric and about 23 mpg gas. It's about 30 cents/mile on electric and about 18 cents/mile on gas.
For this tank only I have been charging at home (and at work, and anywhere I can), because I want to see how much mileage I can get out of a tank with full PHEV driving. In this regard it hasn't disappointed; I'm at 1200 miles and just passed half a tank of gas. But once I have a baseline for how much of my driving can be done on electric, I'll probably switch to just charging at work (where it's free) and using gas for most other driving, because it's so much cheaper.
You should look into a PGE EV time of use rate plan if you can charge your car between 12am and 3pm - that should drop your rate for charge down to about 34 cents per kWh (though on my last bill mine was 28 cents per kWh).
I see what you're saying, that makes sense for that vehicle. I think pure EVs tend to get about twice as many miles per kWh as your car, so for an average pure EV compared to an average pure ICE I think the EV is still cheaper to fill up, although it is pretty close with these prices.
It's not really the pure EV vs. hybrid factor, it's the weight. The CX-90 is a really big (5200 lbs) 8-seater. Hence why its gas mileage is only about 23. It's also very heavily terrain & road dependent, eg. for roads with lots of stop signs in the hills, I get 0.6 mi/kwh or 8 mpg, but for flat highway driving it's about 3.0 mi/kwh or 40 mpg.
A typical EV would get more like 4 mi/kwh, but then, the equivalent ICE car would get more like 35 mpg. The delta's a little bit closer because of peculiarities of the CX-90's powertrain, but not a whole lot.
For this tank only I have been charging at home (and at work, and anywhere I can), because I want to see how much mileage I can get out of a tank with full PHEV driving. In this regard it hasn't disappointed; I'm at 1200 miles and just passed half a tank of gas. But once I have a baseline for how much of my driving can be done on electric, I'll probably switch to just charging at work (where it's free) and using gas for most other driving, because it's so much cheaper.