IMHO here is my formula.
60L gas tank = $120+
Recharge = $bugger all?? 40kW battery at 24c per kWh is $10.
Don't forget to factor in the $/km. 40kWh battery won't get you anywhere near as far as 65L of petrol in a similar vehicle. Then there's the cost of capital and depreciation.
It's going to a fair few years yet before EV is competitive against the ICE when measured against real world costs of ownership.