4.7 mpkWh is 213 Wh per mile, scaled for input power is 265 Wh per mile.
Sounds reasonable - I've seen figures of 250 to 300Wh/mile, but don't forget that winter heating and hot summer A/C (ie. this year in the UK!) will increase these so average annual comnsumption may be a bit higher (quite a bit higher in colder climes than the UK). Of course ICE are slightly less efficient when it's cold but there is no need for any extra cabin heating power. A/C obviously requires more fuel.
That gives me £0.039 per mile. We can argue endlessly as to whether we should include the battery lease as a per mile charge (as Renault bill it) or add it to the purchase price, but if we do add it in then we get to £0.119 per mile.
The battery clearly has to be paid for, either directly in the battery lease cost or indirectly by paying into a fund for its eventual replacement or through the vehicle depreciation which is high for EVs for that reason (amongst others including significantly improved models being, or likely to be, released).
The Renault £.08/mile cost may be reasonable but as far as I know no replacement batteries are available for sale from the manufacturers (in the UK) so we have to guess at the eventual costbut I'd guess that anywhere between £.05 and £.08/mile are realistic costs. This is more than the electricity cost yet rarely gets mentioned when comparing running costs with ICEs.
The car it replaced was a 2010 Chevrolet Spark. Real-world we got around 320 miles to a tank with perhaps 5 L left in the 35 L tank, I pretty much always put 30 L in anyway. My local petrol stations are currently around £1.35 /L for unleaded so those 30 L would cost £40.50, so £0.127 per mile. The Zoe just about breaks even if you include the battery lease.
Again I'd agree that this is a reasonable conclusion - similar costs for EVs and ICEs. I understand that insurance for EVs used to be higher but this may no longer be the case and the high depreciation (above battery cost) may make an EV more costly to run if you change your car every few years.
But the big factor that gets barely mentioned is that EVs are heavily subsidised - not only because of government subsidy for the purchase price but also the lack of duty on the fuel. In the UK 61% of the retail price of petrol and diesel is tax compared to 5% for electricity. That can't remain the case when EVs get more popular (as the government can't afford the loss of so much revenue) so road pricing or similar will have to introduced at some point to ensure EV owners pay their fair share of maintaining the road network, emergency services etc.
That may change the balance somewhat but it could (very likely) be offset by higher charges on ICE vehicles to encourage switching to EVs. I'm not convinced they can go very on this route as doing so may be politically difficult because many people, especially the poorer, won't have the choice to switch to an EV for various reasons including lack of home recharging facilities. The UK government has been forced to cancel the fuel duty rises it had planned for many years now because they were profoundly unpopular and may have lost office for the government of the day at the next election.
I think the mass adoption of EVs will take a lot longer than may expect or wish for - unless there is more radical changes in the battery technology and/or cost than currently predicted.