Interesting you find fuel costs are 1/8th the cost. Where I am gas is $3.75/gallon. Electricity is $0.12 to $0.48 per kWhr. Time of Use raftes. Cost for a fill up of electrity here is either one quarter the cost or if at peak rate is the same as gasoline.
Sounds about right, you're paying a similar price for gasoline, and about double (at your cheapest tariff) what I pay for electricity (mine is that rate 24/7).
My costs in CAD (USD)
electricity C$0.091/kWh (US$0.068)
gasoline C$1.319/litre (US$3.74/USGal)
my car's usage (vs its ICE twin)
17.4kWh/100km @ 0.091/kWh = C$1.58/100km
8.5l/100km @ 1.319/l = C$11.21/100km
Gasoline has dipped a little recently from 1.499 to 1.319/l around here recently, so my original 8x number I calculated a couple of months ago has drifted down to 7x.
My actual fuel costs are a little lower, as the business park I'm in has 14 EVSE spread around (which are always busy), and allow 2hrs of employee charging/day; so for example I managed to grab about 8kWh this afternoon. The free ride on this kind of charging probably isn't that long for the world, but doing it at home is easy enough, and my 40km/day could easily be replenished using just a regular 120V outlet.
*Consumption figures, combined cycle, 2018 VW eGolf vs 2018 VW Golf from Transport Canada https://www.nrcan.gc.ca/energy/efficiency/transportation/21002