I've had this discussion many times. Unless you own a house, with solar panels and your own parking spot any cost/km gains on fuel with EV are marginal. Gas get's adjusted more quickly but eventually the roadside charge prices will catch up. And many "researchers" take the average price (not any better metric) which is heavily skewed by "public" chargers which you cannot use since they are inaccessible on private property but are public for tax reasons.

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tverbeure 18 minutes ago | parent | next [-]

I don’t have solar panels but own a house with parking spot.

I use the PG&E EV2-A night tariff at home which is still 0.23 $/kWh, though the rate at work is only 0.14 $/kWh which I use as much as possible. I rarely use the superchargers (0.45$/kWh.) Let’s use the 0.23 value.

I drive 15k miles per year. At roughly 2.5 mi/kWh. That gives $1380 per year.

At 20 mi/gallon and $6/gallon, I’d pay $4500 per year. At today’s gas prices, the difference is IMO not marginal anymore. (That said, I didn’t buy the EV for the drive savings…)

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spiclk an hour ago | parent | prev [-]

The primary cause of this current price differential is the enormous taxation applied to diesel and petrol in the UK. Obviously this situation won't last.

	▲	consp 37 minutes ago \| parent [-]
		For me (not UK, no price cap on either electricity or petrol) the taxes for the equivalent in EV vs petrol is about half of the taxes for petrol are also applied to EV in km equivalent (11ct/kwh, 84ct/L, assuming my plug in hybrid usage). My main point is that even with happy hour prices this is only viable for people which do not have to rely on external chargers, which is the majority. Currently EV is cheaper again, due to rapid rise of fuel prices, but the power companies with street side chargers generally "adjust" prices every year to match petrol and it's been for a long time cheaper to run petrol. Also: getting petrol from a few km away for cheap is easy, you are not going to park in the next village overnight to charge your car.