I don’t know where the joker who did this is at, but I just looked my state’s Public Service Commission site, and find I am paying $0.132 / kWh. Let’s say he’s in California and it’s around twice that at a nice even $0.25 / kWh.
They saw battery has 210 kWh of capacity. I’m seeing AC-to-DC charging efficiency of 92% our there. For the sake of this, let’s say the charging transformer is 90% efficient.
That means to charge from zero to full you’d take
(210 kWh / 0.90) x $0.25 = $58.33
So the cost of ~$97 means there is about $39 of overhead and profit for the charger operator. At minimum, given the assumptions above.
Also, it states he charged 200+ kWh in 152 minutes. How many volt-amps was that charger??? And for me 200 kWh @ $.13/kWh is only about $26. His cost per kilowatt as you suggest seems whacked.
I tried to do the math on that and my 60 amp level 2 charger certainly would not get CLOSE to that.
P.S. my vehicle is a plug-in hybrid, the ONLY way to go EV is you ask me.