Assuming an ICE that gets 40 mpg and an EV with the efficiency of a Chevy Bolt the EV costs less to charge than the ICE costs to fuel whenever G/E > 9.6, where G is the price of gas in dollars/gallon and E is the price of electricity in dollars/kWh.

At E = 0.35, the EV wins whenever G > 9.6 E = $3.36. Can you get gas for $3.36/gallon or less in California?

Speaking of gas prices, what is up with the large variation among stations? Right now along a mile along the main road in my area it is $3.59 at ARCO, $4.09 at Shell, and $4.39 at Chevron.

The ARCO is no busier than the others so it is not like people are going to Shell or Chevron because the wait is less. They are all selling gas that has the "TOP TIER(tm)" certification so its not like your car is going to have problems if you don't pay an extra $0.80/gallon to use Chevron.

Heck, its not even that you get a better convenience store at Shell or Chevron. ARCO has AM/PM which is way better.

Is 35 cents / kWh normal in CA? I thought Europe had expensive electricity lately!

That's a midrange price actually. Depending on how much and when you use electricity, you could be paying 65c/kWh.

It various a bit from place to place, but it is around that on average [1].

[1] https://www.cpuc.ca.gov/RateComparison

Does AM/PM still not take credit cards?

They've accepted credit cards for quite a while here in Washington. I don't know about California.

Electricity pricing is set to change to lower volume rates paired with a high up front cost to be connected to the grid. We'll see how the lower marginal cost changes consumer behavior.