It would greatly depend on your driving habits. I’m averaging 2k miles a month. My electricity cost averages around 4 cents/mile(14c/kWh). At my current gas prices($5.75) I’d need to get 142mpg to get 4 cents/mile. The rav4 is complicated because it’s both, but I’d get about 40% of my day on electric and 60% on gas. That means 4c/mile for the EV(even granting it’s as efficient as the Tesla which epa numbers aren’t as good) and 36mpg(epa Highway rav4 prime) on the Highway for 60% of my day. 36mpg would be about 16c/mile. So in an average day about 100 miles, it’d be 40 * .04 + 60 * .16 = 13.5c/mile averages over a day. So 24000miles/yr multiples by .04 or 0.135 and it’s $960 vs $3240. That points to in excess of $20k in savings over 10 years. If someone goes 40 miles or less a day these numbers favor a prime quite a bit more.