A gallon of petrol - 40 miles (realistcally and using UK gallon).
According to Tesla their charging is 92% efficient so reduce that 200 to 184 miles.
Your process is 4.5 times less efficient than just putting that electricity into the EV? Is that right?
If so - and your process is carbon neutral (big if) - what's the point in a future where EVs dominate?
It might also be worth looking at where airplanes tanker fuel, that is to say, carry more fuel than they need for their current leg because refueling at the next stop would be difficult or expensive. Apparently a lot of that currently happens on short flights to small islands; while I hope Wright Electric and/or the EViation Alice will eventually take over that market, in the short term that's a market that might be willing to pay a bit more for liquid fuel made from air plus local solar panels.
Fuel oil that can be burned in combined cycle power plants in the winter may also be valuable for dealing with seasonal imbalances in demand vs renewable generation that lithium ion batteries can't cost effectively balance.
EVs won't dominate some important uses for a long time, e.g. aviation and marine shipping.
It's just a great storage mechanism.
Storage is also a big issue when it comes to renewables. You could take in carbon in areas with lots of sun and ship the fuel to areas not well suited for solar generation.
This really would be a game changer for lowing the net carbon output.
This also means you could solve one of the big problems in the power grid, peak generation. Use the extra capacity during off peak hours to generate fuel that is later used to fire up power stations to supply peak demand.